content: /*
   * Copyright (C) 2014 The Android Open Source Project
   * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  // -- This file was mechanically generated: Do not edit! -- //
  
  package java.nio;
  
  import libcore.io.Memory;
  
  import dalvik.annotation.codegen.CovariantReturnType;
  
  /**
   * A byte buffer.
   *
   * <p> This class defines six categories of operations upon
   * byte buffers:
   *
   * <ul>
   *
   *   <li><p> Absolute and relative {@link #get() <i>get</i>} and
   *   {@link #put(byte) <i>put</i>} methods that read and write
   *   single bytes; </p></li>
   *
   *   <li><p> Relative {@link #get(byte[]) <i>bulk get</i>}
   *   methods that transfer contiguous sequences of bytes from this buffer
   *   into an array; </p></li>
   *
   *   <li><p> Relative {@link #put(byte[]) <i>bulk put</i>}
   *   methods that transfer contiguous sequences of bytes from a
   *   byte array or some other byte
   *   buffer into this buffer; </p></li>
   *
   *
   *   <li><p> Absolute and relative {@link #getChar() <i>get</i>}
   *   and {@link #putChar(char) <i>put</i>} methods that read and
   *   write values of other primitive types, translating them to and from
   *   sequences of bytes in a particular byte order; </p></li>
   *
   *   <li><p> Methods for creating <i><a href="#views">view buffers</a></i>,
   *   which allow a byte buffer to be viewed as a buffer containing values of
   *   some other primitive type; and </p></li>
   *
   *
   *   <li><p> Methods for {@link #compact compacting}, {@link
   *   #duplicate duplicating}, and {@link #slice slicing}
   *   a byte buffer.  </p></li>
   *
   * </ul>
   *
   * <p> Byte buffers can be created either by {@link #allocate
   * <i>allocation</i>}, which allocates space for the buffer's
   *
   *
   * content, or by {@link #wrap(byte[]) <i>wrapping</i>} an
   * existing byte array  into a buffer.
   *
   *
   *
   * <a name="direct"></a>
   * <h2> Direct <i>vs.</i> non-direct buffers </h2>
   *
   * <p> A byte buffer is either <i>direct</i> or <i>non-direct</i>.  Given a
   * direct byte buffer, the Java virtual machine will make a best effort to
   * perform native I/O operations directly upon it.  That is, it will attempt to
   * avoid copying the buffer's content to (or from) an intermediate buffer
   * before (or after) each invocation of one of the underlying operating
   * system's native I/O operations.
   *
   * <p> A direct byte buffer may be created by invoking the {@link
   * #allocateDirect(int) allocateDirect} factory method of this class.  The
   * buffers returned by this method typically have somewhat higher allocation
   * and deallocation costs than non-direct buffers.  The contents of direct
   * buffers may reside outside of the normal garbage-collected heap, and so
   * their impact upon the memory footprint of an application might not be
   * obvious.  It is therefore recommended that direct buffers be allocated
   * primarily for large, long-lived buffers that are subject to the underlying
   * system's native I/O operations.  In general it is best to allocate direct
   * buffers only when they yield a measureable gain in program performance.
   *
   * <p> A direct byte buffer may also be created by {@link
   * java.nio.channels.FileChannel#map mapping} a region of a file
   * directly into memory.  An implementation of the Java platform may optionally
   * support the creation of direct byte buffers from native code via JNI.  If an
   * instance of one of these kinds of buffers refers to an inaccessible region
   * of memory then an attempt to access that region will not change the buffer's
   * content and will cause an unspecified exception to be thrown either at the
   * time of the access or at some later time.
   *
   * <p> Whether a byte buffer is direct or non-direct may be determined by
   * invoking its {@link #isDirect isDirect} method.  This method is provided so
   * that explicit buffer management can be done in performance-critical code.
   *
   *
   * <a name="bin"></a>
   * <h2> Access to binary data </h2>
   *
   * <p> This class defines methods for reading and writing values of all other
   * primitive types, except <tt>boolean</tt>.  Primitive values are translated
   * to (or from) sequences of bytes according to the buffer's current byte
   * order, which may be retrieved and modified via the {@link #order order}
   * methods.  Specific byte orders are represented by instances of the {@link
   * ByteOrder} class.  The initial order of a byte buffer is always {@link
   * ByteOrder#BIG_ENDIAN BIG_ENDIAN}.
   *
   * <p> For access to heterogeneous binary data, that is, sequences of values of
   * different types, this class defines a family of absolute and relative
   * <i>get</i> and <i>put</i> methods for each type.  For 32-bit floating-point
   * values, for example, this class defines:
   *
   * <blockquote><pre>
   * float  {@link #getFloat()}
   * float  {@link #getFloat(int) getFloat(int index)}
   *  void  {@link #putFloat(float) putFloat(float f)}
   *  void  {@link #putFloat(int,float) putFloat(int index, float f)}</pre></blockquote>
   *
   * <p> Corresponding methods are defined for the types <tt>char</tt>,
   * <tt>short</tt>, <tt>int</tt>, <tt>long</tt>, and <tt>double</tt>.  The index
   * parameters of the absolute <i>get</i> and <i>put</i> methods are in terms of
   * bytes rather than of the type being read or written.
   *
   * <a name="views"></a>
   *
   * <p> For access to homogeneous binary data, that is, sequences of values of
   * the same type, this class defines methods that can create <i>views</i> of a
   * given byte buffer.  A <i>view buffer</i> is simply another buffer whose
   * content is backed by the byte buffer.  Changes to the byte buffer's content
   * will be visible in the view buffer, and vice versa; the two buffers'
   * position, limit, and mark values are independent.  The {@link
   * #asFloatBuffer() asFloatBuffer} method, for example, creates an instance of
   * the {@link FloatBuffer} class that is backed by the byte buffer upon which
   * the method is invoked.  Corresponding view-creation methods are defined for
   * the types <tt>char</tt>, <tt>short</tt>, <tt>int</tt>, <tt>long</tt>, and
   * <tt>double</tt>.
   *
   * <p> View buffers have three important advantages over the families of
   * type-specific <i>get</i> and <i>put</i> methods described above:
   *
   * <ul>
   *
   *   <li><p> A view buffer is indexed not in terms of bytes but rather in terms
   *   of the type-specific size of its values;  </p></li>
   *
   *   <li><p> A view buffer provides relative bulk <i>get</i> and <i>put</i>
   *   methods that can transfer contiguous sequences of values between a buffer
   *   and an array or some other buffer of the same type; and  </p></li>
   *
   *   <li><p> A view buffer is potentially much more efficient because it will
   *   be direct if, and only if, its backing byte buffer is direct.  </p></li>
   *
   * </ul>
   *
   * <p> The byte order of a view buffer is fixed to be that of its byte buffer
   * at the time that the view is created.  </p>
   *
  *
  *
   *
   * <h2> Invocation chaining </h2>
   *
   * <p> Methods in this class that do not otherwise have a value to return are
   * specified to return the buffer upon which they are invoked.  This allows
   * method invocations to be chained.
   *
   *
   * The sequence of statements
   *
   * <blockquote><pre>
   * bb.putInt(0xCAFEBABE);
   * bb.putShort(3);
   * bb.putShort(45);</pre></blockquote>
   *
   * can, for example, be replaced by the single statement
   *
   * <blockquote><pre>
   * bb.putInt(0xCAFEBABE).putShort(3).putShort(45);</pre></blockquote>
   *
   *
   *
   * @author Mark Reinhold
   * @author JSR-51 Expert Group
   * @since 1.4
   */
  
  public abstract class ByteBuffer
      extends Buffer
      implements Comparable<ByteBuffer>
  {
  
      // These fields are declared here rather than in Heap-X-Buffer in order to
      // reduce the number of virtual method invocations needed to access these
      // values, which is especially costly when coding small buffers.
      //
      final byte[] hb;                  // Non-null only for heap buffers
      final int offset;
      boolean isReadOnly;                 // Valid only for heap buffers
  
      // Creates a new buffer with the given mark, position, limit, capacity,
      // backing array, and array offset
      //
      ByteBuffer(int mark, int pos, int lim, int cap,   // package-private
                   byte[] hb, int offset)
      {
          // Android-added: elementSizeShift parameter (log2 of element size).
          super(mark, pos, lim, cap, 0 /* elementSizeShift */);
          this.hb = hb;
          this.offset = offset;
      }
  
      // Creates a new buffer with the given mark, position, limit, and capacity
      //
      ByteBuffer(int mark, int pos, int lim, int cap) { // package-private
          this(mark, pos, lim, cap, null, 0);
      }
  
  
      /**
       * Allocates a new direct byte buffer.
       *
       * <p> The new buffer's position will be zero, its limit will be its
       * capacity, its mark will be undefined, and each of its elements will be
       * initialized to zero.  Whether or not it has a
       * {@link #hasArray backing array} is unspecified.
       *
       * @param  capacity
       *         The new buffer's capacity, in bytes
       *
       * @return  The new byte buffer
       *
       * @throws  IllegalArgumentException
       *          If the <tt>capacity</tt> is a negative integer
       */
      public static ByteBuffer allocateDirect(int capacity) {
          // Android-changed: Android's DirectByteBuffers carry a MemoryRef.
          // return new DirectByteBuffer(capacity);
          DirectByteBuffer.MemoryRef memoryRef = new DirectByteBuffer.MemoryRef(capacity);
          return new DirectByteBuffer(capacity, memoryRef);
      }
  
  
      /**
       * Allocates a new byte buffer.
       *
       * <p> The new buffer's position will be zero, its limit will be its
       * capacity, its mark will be undefined, and each of its elements will be
       * initialized to zero.  It will have a {@link #array backing array},
       * and its {@link #arrayOffset array offset} will be zero.
       *
       * @param  capacity
       *         The new buffer's capacity, in bytes
       *
       * @return  The new byte buffer
       *
       * @throws  IllegalArgumentException
       *          If the <tt>capacity</tt> is a negative integer
       */
      public static ByteBuffer allocate(int capacity) {
          if (capacity < 0)
              throw new IllegalArgumentException();
          return new HeapByteBuffer(capacity, capacity);
      }
  
      /**
       * Wraps a byte array into a buffer.
       *
       * <p> The new buffer will be backed by the given byte array;
       * that is, modifications to the buffer will cause the array to be modified
       * and vice versa.  The new buffer's capacity will be
       * <tt>array.length</tt>, its position will be <tt>offset</tt>, its limit
       * will be <tt>offset + length</tt>, and its mark will be undefined.  Its
       * {@link #array backing array} will be the given array, and
       * its {@link #arrayOffset array offset} will be zero.  </p>
       *
       * @param  array
       *         The array that will back the new buffer
       *
       * @param  offset
       *         The offset of the subarray to be used; must be non-negative and
       *         no larger than <tt>array.length</tt>.  The new buffer's position
       *         will be set to this value.
       *
       * @param  length
       *         The length of the subarray to be used;
       *         must be non-negative and no larger than
       *         <tt>array.length - offset</tt>.
       *         The new buffer's limit will be set to <tt>offset + length</tt>.
       *
       * @return  The new byte buffer
       *
       * @throws  IndexOutOfBoundsException
       *          If the preconditions on the <tt>offset</tt> and <tt>length</tt>
       *          parameters do not hold
       */
      public static ByteBuffer wrap(byte[] array,
                                      int offset, int length)
      {
          try {
              return new HeapByteBuffer(array, offset, length);
          } catch (IllegalArgumentException x) {
              throw new IndexOutOfBoundsException();
          }
      }
  
      /**
       * Wraps a byte array into a buffer.
       *
       * <p> The new buffer will be backed by the given byte array;
       * that is, modifications to the buffer will cause the array to be modified
       * and vice versa.  The new buffer's capacity and limit will be
       * <tt>array.length</tt>, its position will be zero, and its mark will be
       * undefined.  Its {@link #array backing array} will be the
       * given array, and its {@link #arrayOffset array offset>} will
       * be zero.  </p>
       *
       * @param  array
       *         The array that will back this buffer
       *
       * @return  The new byte buffer
       */
      public static ByteBuffer wrap(byte[] array) {
          return wrap(array, 0, array.length);
      }
  
  
      /**
       * Creates a new byte buffer whose content is a shared subsequence of
       * this buffer's content.
       *
       * <p> The content of the new buffer will start at this buffer's current
       * position.  Changes to this buffer's content will be visible in the new
       * buffer, and vice versa; the two buffers' position, limit, and mark
       * values will be independent.
       *
       * <p> The new buffer's position will be zero, its capacity and its limit
       * will be the number of bytes remaining in this buffer, and its mark
       * will be undefined.  The new buffer will be direct if, and only if, this
       * buffer is direct, and it will be read-only if, and only if, this buffer
       * is read-only.  </p>
       *
       * @return  The new byte buffer
       */
      public abstract ByteBuffer slice();
  
      /**
       * Creates a new byte buffer that shares this buffer's content.
       *
       * <p> The content of the new buffer will be that of this buffer.  Changes
       * to this buffer's content will be visible in the new buffer, and vice
       * versa; the two buffers' position, limit, and mark values will be
       * independent.
       *
       * <p> The new buffer's capacity, limit, position, and mark values will be
       * identical to those of this buffer.  The new buffer will be direct if,
       * and only if, this buffer is direct, and it will be read-only if, and
       * only if, this buffer is read-only.  </p>
       *
       * @return  The new byte buffer
       */
      public abstract ByteBuffer duplicate();
  
      /**
       * Creates a new, read-only byte buffer that shares this buffer's
       * content.
       *
       * <p> The content of the new buffer will be that of this buffer.  Changes
       * to this buffer's content will be visible in the new buffer; the new
       * buffer itself, however, will be read-only and will not allow the shared
       * content to be modified.  The two buffers' position, limit, and mark
       * values will be independent.
       *
       * <p> The new buffer's capacity, limit, position, and mark values will be
       * identical to those of this buffer.
       *
       * <p> If this buffer is itself read-only then this method behaves in
       * exactly the same way as the {@link #duplicate duplicate} method.  </p>
       *
       * @return  The new, read-only byte buffer
       */
      public abstract ByteBuffer asReadOnlyBuffer();
  
  
      // -- Singleton get/put methods --
  
      /**
       * Relative <i>get</i> method.  Reads the byte at this buffer's
       * current position, and then increments the position.
       *
       * @return  The byte at the buffer's current position
       *
       * @throws  BufferUnderflowException
       *          If the buffer's current position is not smaller than its limit
       */
      public abstract byte get();
  
      /**
       * Relative <i>put</i> method&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes the given byte into this buffer at the current
       * position, and then increments the position. </p>
       *
       * @param  b
       *         The byte to be written
       *
       * @return  This buffer
       *
       * @throws  BufferOverflowException
       *          If this buffer's current position is not smaller than its limit
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer put(byte b);
  
      /**
       * Absolute <i>get</i> method.  Reads the byte at the given
       * index.
       *
       * @param  index
       *         The index from which the byte will be read
       *
       * @return  The byte at the given index
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit
       */
      public abstract byte get(int index);
  
      /**
       * Absolute <i>put</i> method&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes the given byte into this buffer at the given
       * index. </p>
       *
       * @param  index
       *         The index at which the byte will be written
       *
       * @param  b
       *         The byte value to be written
       *
       * @return  This buffer
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer put(int index, byte b);
  
  
      // -- Bulk get operations --
  
      /**
       * Relative bulk <i>get</i> method.
       *
       * <p> This method transfers bytes from this buffer into the given
       * destination array.  If there are fewer bytes remaining in the
       * buffer than are required to satisfy the request, that is, if
       * <tt>length</tt>&nbsp;<tt>&gt;</tt>&nbsp;<tt>remaining()</tt>, then no
       * bytes are transferred and a {@link BufferUnderflowException} is
       * thrown.
       *
       * <p> Otherwise, this method copies <tt>length</tt> bytes from this
       * buffer into the given array, starting at the current position of this
       * buffer and at the given offset in the array.  The position of this
       * buffer is then incremented by <tt>length</tt>.
       *
       * <p> In other words, an invocation of this method of the form
       * <tt>src.get(dst,&nbsp;off,&nbsp;len)</tt> has exactly the same effect as
       * the loop
       *
       * <pre>{@code
       *     for (int i = off; i < off + len; i++)
       *         dst[i] = src.get();
       * }</pre>
       *
       * except that it first checks that there are sufficient bytes in
       * this buffer and it is potentially much more efficient.
       *
       * @param  dst
       *         The array into which bytes are to be written
       *
       * @param  offset
       *         The offset within the array of the first byte to be
       *         written; must be non-negative and no larger than
       *         <tt>dst.length</tt>
       *
       * @param  length
       *         The maximum number of bytes to be written to the given
       *         array; must be non-negative and no larger than
       *         <tt>dst.length - offset</tt>
       *
       * @return  This buffer
       *
       * @throws  BufferUnderflowException
       *          If there are fewer than <tt>length</tt> bytes
       *          remaining in this buffer
       *
       * @throws  IndexOutOfBoundsException
       *          If the preconditions on the <tt>offset</tt> and <tt>length</tt>
       *          parameters do not hold
       */
      public ByteBuffer get(byte[] dst, int offset, int length) {
          checkBounds(offset, length, dst.length);
          if (length > remaining())
              throw new BufferUnderflowException();
          int end = offset + length;
          for (int i = offset; i < end; i++)
              dst[i] = get();
          return this;
      }
  
      /**
       * Relative bulk <i>get</i> method.
       *
       * <p> This method transfers bytes from this buffer into the given
       * destination array.  An invocation of this method of the form
       * <tt>src.get(a)</tt> behaves in exactly the same way as the invocation
       *
       * <pre>
       *     src.get(a, 0, a.length) </pre>
       *
       * @param   dst
       *          The destination array
       *
       * @return  This buffer
       *
       * @throws  BufferUnderflowException
       *          If there are fewer than <tt>length</tt> bytes
       *          remaining in this buffer
       */
      public ByteBuffer get(byte[] dst) {
          return get(dst, 0, dst.length);
      }
  
  
      // -- Bulk put operations --
  
      /**
       * Relative bulk <i>put</i> method&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> This method transfers the bytes remaining in the given source
       * buffer into this buffer.  If there are more bytes remaining in the
       * source buffer than in this buffer, that is, if
       * <tt>src.remaining()</tt>&nbsp;<tt>&gt;</tt>&nbsp;<tt>remaining()</tt>,
       * then no bytes are transferred and a {@link
       * BufferOverflowException} is thrown.
       *
       * <p> Otherwise, this method copies
       * <i>n</i>&nbsp;=&nbsp;<tt>src.remaining()</tt> bytes from the given
       * buffer into this buffer, starting at each buffer's current position.
       * The positions of both buffers are then incremented by <i>n</i>.
       *
       * <p> In other words, an invocation of this method of the form
       * <tt>dst.put(src)</tt> has exactly the same effect as the loop
       *
       * <pre>
       *     while (src.hasRemaining())
       *         dst.put(src.get()); </pre>
       *
       * except that it first checks that there is sufficient space in this
       * buffer and it is potentially much more efficient.
       *
       * @param  src
       *         The source buffer from which bytes are to be read;
       *         must not be this buffer
       *
       * @return  This buffer
       *
       * @throws  BufferOverflowException
       *          If there is insufficient space in this buffer
       *          for the remaining bytes in the source buffer
       *
       * @throws  IllegalArgumentException
       *          If the source buffer is this buffer
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public ByteBuffer put(ByteBuffer src) {
          if (src == this)
              throw new IllegalArgumentException();
          if (isReadOnly())
              throw new ReadOnlyBufferException();
          int n = src.remaining();
          if (n > remaining())
              throw new BufferOverflowException();
  
          // Android-changed: improve ByteBuffer.put(ByteBuffer) performance through bulk copy.
          /*
          for (int i = 0; i < n; i++)
              put(src.get());
          */
          // Note that we use offset instead of arrayOffset because arrayOffset is specified to
          // throw for read only buffers. Our use of arrayOffset here is provably safe, we only
          // use it to read *from* readOnly buffers.
          if (this.hb != null && src.hb != null) {
              // System.arraycopy is intrinsified by ART and therefore tiny bit faster than memmove
              System.arraycopy(src.hb, src.position() + src.offset, hb, position() + offset, n);
          } else {
              // Use the buffer object (and the raw memory address) if it's a direct buffer. Note that
              // isDirect() doesn't imply !hasArray(), ByteBuffer.allocateDirect allocated buffer will
              // have a backing, non-gc-movable byte array. JNI allocated direct byte buffers WILL NOT
              // have a backing array.
              final Object srcObject = src.isDirect() ? src : src.hb;
              int srcOffset = src.position();
              if (!src.isDirect()) {
                  srcOffset += src.offset;
              }
  
              final ByteBuffer dst = this;
              final Object dstObject = dst.isDirect() ? dst : dst.hb;
              int dstOffset = dst.position();
              if (!dst.isDirect()) {
                  dstOffset += dst.offset;
              }
              Memory.memmove(dstObject, dstOffset, srcObject, srcOffset, n);
          }
          src.position(src.limit());
          this.position(this.position() + n);
          return this;
      }
  
      /**
       * Relative bulk <i>put</i> method&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> This method transfers bytes into this buffer from the given
       * source array.  If there are more bytes to be copied from the array
       * than remain in this buffer, that is, if
       * <tt>length</tt>&nbsp;<tt>&gt;</tt>&nbsp;<tt>remaining()</tt>, then no
       * bytes are transferred and a {@link BufferOverflowException} is
       * thrown.
       *
       * <p> Otherwise, this method copies <tt>length</tt> bytes from the
       * given array into this buffer, starting at the given offset in the array
       * and at the current position of this buffer.  The position of this buffer
       * is then incremented by <tt>length</tt>.
       *
       * <p> In other words, an invocation of this method of the form
       * <tt>dst.put(src,&nbsp;off,&nbsp;len)</tt> has exactly the same effect as
       * the loop
       *
       * <pre>{@code
       *     for (int i = off; i < off + len; i++)
       *         dst.put(a[i]);
       * }</pre>
       *
       * except that it first checks that there is sufficient space in this
       * buffer and it is potentially much more efficient.
       *
       * @param  src
       *         The array from which bytes are to be read
       *
       * @param  offset
       *         The offset within the array of the first byte to be read;
       *         must be non-negative and no larger than <tt>array.length</tt>
       *
       * @param  length
       *         The number of bytes to be read from the given array;
       *         must be non-negative and no larger than
       *         <tt>array.length - offset</tt>
       *
       * @return  This buffer
       *
       * @throws  BufferOverflowException
       *          If there is insufficient space in this buffer
       *
       * @throws  IndexOutOfBoundsException
       *          If the preconditions on the <tt>offset</tt> and <tt>length</tt>
       *          parameters do not hold
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public ByteBuffer put(byte[] src, int offset, int length) {
          checkBounds(offset, length, src.length);
          if (length > remaining())
              throw new BufferOverflowException();
          int end = offset + length;
          for (int i = offset; i < end; i++)
              this.put(src[i]);
          return this;
      }
  
      /**
       * Relative bulk <i>put</i> method&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> This method transfers the entire content of the given source
       * byte array into this buffer.  An invocation of this method of the
       * form <tt>dst.put(a)</tt> behaves in exactly the same way as the
       * invocation
       *
       * <pre>
       *     dst.put(a, 0, a.length) </pre>
       *
       * @param   src
       *          The source array
       *
       * @return  This buffer
       *
       * @throws  BufferOverflowException
       *          If there is insufficient space in this buffer
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public final ByteBuffer put(byte[] src) {
          return put(src, 0, src.length);
      }
  
  
      // -- Other stuff --
  
      /**
       * Tells whether or not this buffer is backed by an accessible byte
       * array.
       *
       * <p> If this method returns <tt>true</tt> then the {@link #array() array}
       * and {@link #arrayOffset() arrayOffset} methods may safely be invoked.
       * </p>
       *
       * @return  <tt>true</tt> if, and only if, this buffer
       *          is backed by an array and is not read-only
       */
      public final boolean hasArray() {
          return (hb != null) && !isReadOnly;
      }
  
      /**
       * Returns the byte array that backs this
       * buffer&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Modifications to this buffer's content will cause the returned
       * array's content to be modified, and vice versa.
       *
       * <p> Invoke the {@link #hasArray hasArray} method before invoking this
       * method in order to ensure that this buffer has an accessible backing
       * array.  </p>
       *
       * @return  The array that backs this buffer
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is backed by an array but is read-only
       *
       * @throws  UnsupportedOperationException
       *          If this buffer is not backed by an accessible array
       */
      public final byte[] array() {
          if (hb == null)
              throw new UnsupportedOperationException();
          if (isReadOnly)
              throw new ReadOnlyBufferException();
          return hb;
      }
  
      /**
       * Returns the offset within this buffer's backing array of the first
       * element of the buffer&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> If this buffer is backed by an array then buffer position <i>p</i>
       * corresponds to array index <i>p</i>&nbsp;+&nbsp;<tt>arrayOffset()</tt>.
       *
       * <p> Invoke the {@link #hasArray hasArray} method before invoking this
       * method in order to ensure that this buffer has an accessible backing
       * array.  </p>
       *
       * @return  The offset within this buffer's array
       *          of the first element of the buffer
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is backed by an array but is read-only
       *
       * @throws  UnsupportedOperationException
       *          If this buffer is not backed by an accessible array
       */
      public final int arrayOffset() {
          if (hb == null)
              throw new UnsupportedOperationException();
          if (isReadOnly)
              throw new ReadOnlyBufferException();
          return offset;
      }
  
      // BEGIN Android-added: covariant overloads of *Buffer methods that return this.
      @CovariantReturnType(returnType = ByteBuffer.class, presentAfter = 28)
      @Override
      public Buffer position(int newPosition) {
          return super.position(newPosition);
      }
  
      @CovariantReturnType(returnType = ByteBuffer.class, presentAfter = 28)
      @Override
      public Buffer limit(int newLimit) {
          return super.limit(newLimit);
      }
  
      @CovariantReturnType(returnType = ByteBuffer.class, presentAfter = 28)
      @Override
      public Buffer mark() {
          return super.mark();
      }
  
      @CovariantReturnType(returnType = ByteBuffer.class, presentAfter = 28)
      @Override
      public Buffer reset() {
          return super.reset();
      }
  
      @CovariantReturnType(returnType = ByteBuffer.class, presentAfter = 28)
      @Override
      public Buffer clear() {
          return super.clear();
      }
  
      @CovariantReturnType(returnType = ByteBuffer.class, presentAfter = 28)
      @Override
      public Buffer flip() {
          return super.flip();
      }
  
      @CovariantReturnType(returnType = ByteBuffer.class, presentAfter = 28)
      @Override
      public Buffer rewind() {
          return super.rewind();
      }
      // END Android-added: covariant overloads of *Buffer methods that return this.
  
      /**
       * Compacts this buffer&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> The bytes between the buffer's current position and its limit,
       * if any, are copied to the beginning of the buffer.  That is, the
       * byte at index <i>p</i>&nbsp;=&nbsp;<tt>position()</tt> is copied
       * to index zero, the byte at index <i>p</i>&nbsp;+&nbsp;1 is copied
       * to index one, and so forth until the byte at index
       * <tt>limit()</tt>&nbsp;-&nbsp;1 is copied to index
       * <i>n</i>&nbsp;=&nbsp;<tt>limit()</tt>&nbsp;-&nbsp;<tt>1</tt>&nbsp;-&nbsp;<i>p</i>.
       * The buffer's position is then set to <i>n+1</i> and its limit is set to
       * its capacity.  The mark, if defined, is discarded.
       *
       * <p> The buffer's position is set to the number of bytes copied,
       * rather than to zero, so that an invocation of this method can be
       * followed immediately by an invocation of another relative <i>put</i>
       * method. </p>
       *
  
       *
       * <p> Invoke this method after writing data from a buffer in case the
       * write was incomplete.  The following loop, for example, copies bytes
       * from one channel to another via the buffer <tt>buf</tt>:
       *
       * <blockquote><pre>{@code
       *   buf.clear();          // Prepare buffer for use
       *   while (in.read(buf) >= 0 || buf.position != 0) {
       *       buf.flip();
       *       out.write(buf);
       *       buf.compact();    // In case of partial write
       *   }
       * }</pre></blockquote>
       *
  
       *
       * @return  This buffer
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer compact();
  
      /**
       * Tells whether or not this byte buffer is direct.
       *
       * @return  <tt>true</tt> if, and only if, this buffer is direct
       */
      public abstract boolean isDirect();
  
  
      /**
       * Returns a string summarizing the state of this buffer.
       *
       * @return  A summary string
       */
      public String toString() {
          StringBuffer sb = new StringBuffer();
          sb.append(getClass().getName());
          sb.append("[pos=");
          sb.append(position());
          sb.append(" lim=");
          sb.append(limit());
          sb.append(" cap=");
          sb.append(capacity());
          sb.append("]");
          return sb.toString();
      }
  
  
      /**
       * Returns the current hash code of this buffer.
       *
       * <p> The hash code of a byte buffer depends only upon its remaining
       * elements; that is, upon the elements from <tt>position()</tt> up to, and
       * including, the element at <tt>limit()</tt>&nbsp;-&nbsp;<tt>1</tt>.
       *
       * <p> Because buffer hash codes are content-dependent, it is inadvisable
       * to use buffers as keys in hash maps or similar data structures unless it
       * is known that their contents will not change.  </p>
       *
       * @return  The current hash code of this buffer
       */
      public int hashCode() {
          int h = 1;
          int p = position();
          for (int i = limit() - 1; i >= p; i--)
              h = 31 * h + (int)get(i);
          return h;
      }
  
      /**
       * Tells whether or not this buffer is equal to another object.
       *
       * <p> Two byte buffers are equal if, and only if,
       *
       * <ol>
       *
       *   <li><p> They have the same element type,  </p></li>
       *
       *   <li><p> They have the same number of remaining elements, and
       *   </p></li>
       *
       *   <li><p> The two sequences of remaining elements, considered
       *   independently of their starting positions, are pointwise equal.
  
       *   </p></li>
       *
       * </ol>
       *
       * <p> A byte buffer is not equal to any other type of object.  </p>
       *
       * @param  ob  The object to which this buffer is to be compared
       *
       * @return  <tt>true</tt> if, and only if, this buffer is equal to the
       *           given object
       */
      public boolean equals(Object ob) {
          if (this == ob)
              return true;
          if (!(ob instanceof ByteBuffer))
              return false;
          ByteBuffer that = (ByteBuffer)ob;
          if (this.remaining() != that.remaining())
              return false;
          int p = this.position();
          for (int i = this.limit() - 1, j = that.limit() - 1; i >= p; i--, j--)
              if (!equals(this.get(i), that.get(j)))
                  return false;
          return true;
      }
  
      private static boolean equals(byte x, byte y) {
  
  
          return x == y;
  
      }
  
      /**
       * Compares this buffer to another.
       *
       * <p> Two byte buffers are compared by comparing their sequences of
       * remaining elements lexicographically, without regard to the starting
       * position of each sequence within its corresponding buffer.
       *
       *
       *
       *
       *
       *
       *
       *
       * Pairs of {@code byte} elements are compared as if by invoking
       * {@link Byte#compare(byte,byte)}.
  
       *
       * <p> A byte buffer is not comparable to any other type of object.
       *
       * @return  A negative integer, zero, or a positive integer as this buffer
       *          is less than, equal to, or greater than the given buffer
       */
      public int compareTo(ByteBuffer that) {
          int n = this.position() + Math.min(this.remaining(), that.remaining());
          for (int i = this.position(), j = that.position(); i < n; i++, j++) {
              int cmp = compare(this.get(i), that.get(j));
              if (cmp != 0)
                  return cmp;
          }
          return this.remaining() - that.remaining();
      }
  
      private static int compare(byte x, byte y) {
  
  
          return Byte.compare(x, y);
  
      }
  
      // -- Other char stuff --
  
  
      // -- Other byte stuff: Access to binary data --
  
  
      boolean bigEndian                                   // package-private
          = true;
      boolean nativeByteOrder                             // package-private
          = (Bits.byteOrder() == ByteOrder.BIG_ENDIAN);
  
      /**
       * Retrieves this buffer's byte order.
       *
       * <p> The byte order is used when reading or writing multibyte values, and
       * when creating buffers that are views of this byte buffer.  The order of
       * a newly-created byte buffer is always {@link ByteOrder#BIG_ENDIAN
       * BIG_ENDIAN}.  </p>
       *
       * @return  This buffer's byte order
       */
      public final ByteOrder order() {
          return bigEndian ? ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN;
      }
  
      /**
       * Modifies this buffer's byte order.
       *
       * @param  bo
       *         The new byte order,
       *         either {@link ByteOrder#BIG_ENDIAN BIG_ENDIAN}
       *         or {@link ByteOrder#LITTLE_ENDIAN LITTLE_ENDIAN}
       *
       * @return  This buffer
       */
      public final ByteBuffer order(ByteOrder bo) {
          bigEndian = (bo == ByteOrder.BIG_ENDIAN);
          nativeByteOrder =
              (bigEndian == (Bits.byteOrder() == ByteOrder.BIG_ENDIAN));
          return this;
      }
  
      // Unchecked accessors, for use by ByteBufferAs-X-Buffer classes
      //
      abstract byte _get(int i);                          // package-private
      abstract void _put(int i, byte b);                  // package-private
  
  
      /**
       * Relative <i>get</i> method for reading a char value.
       *
       * <p> Reads the next two bytes at this buffer's current position,
       * composing them into a char value according to the current byte order,
       * and then increments the position by two.  </p>
       *
       * @return  The char value at the buffer's current position
       *
       * @throws  BufferUnderflowException
       *          If there are fewer than two bytes
       *          remaining in this buffer
       */
      public abstract char getChar();
  
      /**
       * Relative <i>put</i> method for writing a char
       * value&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes two bytes containing the given char value, in the
       * current byte order, into this buffer at the current position, and then
       * increments the position by two.  </p>
       *
       * @param  value
       *         The char value to be written
       *
       * @return  This buffer
       *
       * @throws  BufferOverflowException
       *          If there are fewer than two bytes
       *          remaining in this buffer
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer putChar(char value);
  
      /**
       * Absolute <i>get</i> method for reading a char value.
       *
       * <p> Reads two bytes at the given index, composing them into a
       * char value according to the current byte order.  </p>
       *
       * @param  index
       *         The index from which the bytes will be read
       *
       * @return  The char value at the given index
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit,
       *          minus one
       */
      public abstract char getChar(int index);
  
      // BEGIN Android-added: {get,put}*Unchecked() accessors.
      abstract char getCharUnchecked(int index);
      abstract void getUnchecked(int pos, char[] dst, int dstOffset, int length);
      // END Android-added: {get,put}*Unchecked() accessors.
  
      /**
       * Absolute <i>put</i> method for writing a char
       * value&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes two bytes containing the given char value, in the
       * current byte order, into this buffer at the given index.  </p>
       *
       * @param  index
       *         The index at which the bytes will be written
       *
       * @param  value
       *         The char value to be written
       *
       * @return  This buffer
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit,
       *          minus one
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer putChar(int index, char value);
  
      // BEGIN Android-added: {get,put}*Unchecked() accessors.
      abstract void putCharUnchecked(int index, char value);
      abstract void putUnchecked(int pos, char[] dst, int srcOffset, int length);
      // END Android-added: {get,put}*Unchecked() accessors.
  
      /**
       * Creates a view of this byte buffer as a char buffer.
       *
       * <p> The content of the new buffer will start at this buffer's current
       * position.  Changes to this buffer's content will be visible in the new
       * buffer, and vice versa; the two buffers' position, limit, and mark
       * values will be independent.
       *
       * <p> The new buffer's position will be zero, its capacity and its limit
       * will be the number of bytes remaining in this buffer divided by
       * two, and its mark will be undefined.  The new buffer will be direct
       * if, and only if, this buffer is direct, and it will be read-only if, and
       * only if, this buffer is read-only.  </p>
       *
       * @return  A new char buffer
       */
      public abstract CharBuffer asCharBuffer();
  
  
      /**
       * Relative <i>get</i> method for reading a short value.
       *
       * <p> Reads the next two bytes at this buffer's current position,
       * composing them into a short value according to the current byte order,
       * and then increments the position by two.  </p>
       *
       * @return  The short value at the buffer's current position
       *
       * @throws  BufferUnderflowException
       *          If there are fewer than two bytes
       *          remaining in this buffer
       */
      public abstract short getShort();
  
      /**
       * Relative <i>put</i> method for writing a short
       * value&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes two bytes containing the given short value, in the
       * current byte order, into this buffer at the current position, and then
       * increments the position by two.  </p>
       *
       * @param  value
       *         The short value to be written
       *
       * @return  This buffer
       *
       * @throws  BufferOverflowException
       *          If there are fewer than two bytes
       *          remaining in this buffer
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer putShort(short value);
  
      /**
       * Absolute <i>get</i> method for reading a short value.
       *
       * <p> Reads two bytes at the given index, composing them into a
       * short value according to the current byte order.  </p>
       *
       * @param  index
       *         The index from which the bytes will be read
       *
       * @return  The short value at the given index
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit,
       *          minus one
       */
      public abstract short getShort(int index);
  
      // BEGIN Android-added: {get,put}*Unchecked() accessors.
      abstract short getShortUnchecked(int index);
      abstract void getUnchecked(int pos, short[] dst, int dstOffset, int length);
      // END Android-added: {get,put}*Unchecked() accessors.
  
      /**
       * Absolute <i>put</i> method for writing a short
       * value&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes two bytes containing the given short value, in the
       * current byte order, into this buffer at the given index.  </p>
       *
       * @param  index
       *         The index at which the bytes will be written
       *
       * @param  value
       *         The short value to be written
       *
       * @return  This buffer
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit,
       *          minus one
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer putShort(int index, short value);
  
      // BEGIN Android-added: {get,put}*Unchecked() accessors.
      abstract void putShortUnchecked(int index, short value);
      abstract void putUnchecked(int pos, short[] dst, int srcOffset, int length);
      // END Android-added: {get,put}*Unchecked() accessors.
  
      /**
       * Creates a view of this byte buffer as a short buffer.
       *
       * <p> The content of the new buffer will start at this buffer's current
       * position.  Changes to this buffer's content will be visible in the new
       * buffer, and vice versa; the two buffers' position, limit, and mark
       * values will be independent.
       *
       * <p> The new buffer's position will be zero, its capacity and its limit
       * will be the number of bytes remaining in this buffer divided by
       * two, and its mark will be undefined.  The new buffer will be direct
       * if, and only if, this buffer is direct, and it will be read-only if, and
       * only if, this buffer is read-only.  </p>
       *
       * @return  A new short buffer
       */
      public abstract ShortBuffer asShortBuffer();
  
  
      /**
       * Relative <i>get</i> method for reading an int value.
       *
       * <p> Reads the next four bytes at this buffer's current position,
       * composing them into an int value according to the current byte order,
       * and then increments the position by four.  </p>
       *
       * @return  The int value at the buffer's current position
       *
       * @throws  BufferUnderflowException
       *          If there are fewer than four bytes
       *          remaining in this buffer
       */
      public abstract int getInt();
  
      /**
       * Relative <i>put</i> method for writing an int
       * value&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes four bytes containing the given int value, in the
       * current byte order, into this buffer at the current position, and then
       * increments the position by four.  </p>
       *
       * @param  value
       *         The int value to be written
       *
       * @return  This buffer
       *
       * @throws  BufferOverflowException
       *          If there are fewer than four bytes
       *          remaining in this buffer
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer putInt(int value);
  
      /**
       * Absolute <i>get</i> method for reading an int value.
       *
       * <p> Reads four bytes at the given index, composing them into a
       * int value according to the current byte order.  </p>
       *
       * @param  index
       *         The index from which the bytes will be read
       *
       * @return  The int value at the given index
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit,
       *          minus three
       */
      public abstract int getInt(int index);
  
      // BEGIN Android-added: {get,put}*Unchecked() accessors.
      abstract int getIntUnchecked(int index);
      abstract void getUnchecked(int pos, int[] dst, int dstOffset, int length);
      // END Android-added: {get,put}*Unchecked() accessors.
  
      /**
       * Absolute <i>put</i> method for writing an int
       * value&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes four bytes containing the given int value, in the
       * current byte order, into this buffer at the given index.  </p>
       *
       * @param  index
       *         The index at which the bytes will be written
       *
       * @param  value
       *         The int value to be written
       *
       * @return  This buffer
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit,
       *          minus three
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer putInt(int index, int value);
  
      // BEGIN Android-added: {get,put}*Unchecked() accessors.
      abstract void putIntUnchecked(int index, int value);
      abstract void putUnchecked(int pos, int[] dst, int srcOffset, int length);
      // END Android-added: {get,put}*Unchecked() accessors.
  
      /**
       * Creates a view of this byte buffer as an int buffer.
       *
       * <p> The content of the new buffer will start at this buffer's current
       * position.  Changes to this buffer's content will be visible in the new
       * buffer, and vice versa; the two buffers' position, limit, and mark
       * values will be independent.
       *
       * <p> The new buffer's position will be zero, its capacity and its limit
       * will be the number of bytes remaining in this buffer divided by
       * four, and its mark will be undefined.  The new buffer will be direct
       * if, and only if, this buffer is direct, and it will be read-only if, and
       * only if, this buffer is read-only.  </p>
       *
       * @return  A new int buffer
       */
      public abstract IntBuffer asIntBuffer();
  
  
      /**
       * Relative <i>get</i> method for reading a long value.
       *
       * <p> Reads the next eight bytes at this buffer's current position,
       * composing them into a long value according to the current byte order,
       * and then increments the position by eight.  </p>
       *
       * @return  The long value at the buffer's current position
       *
       * @throws  BufferUnderflowException
       *          If there are fewer than eight bytes
       *          remaining in this buffer
       */
      public abstract long getLong();
  
      /**
       * Relative <i>put</i> method for writing a long
       * value&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes eight bytes containing the given long value, in the
       * current byte order, into this buffer at the current position, and then
       * increments the position by eight.  </p>
       *
       * @param  value
       *         The long value to be written
       *
       * @return  This buffer
       *
       * @throws  BufferOverflowException
       *          If there are fewer than eight bytes
       *          remaining in this buffer
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer putLong(long value);
  
      /**
       * Absolute <i>get</i> method for reading a long value.
       *
       * <p> Reads eight bytes at the given index, composing them into a
       * long value according to the current byte order.  </p>
       *
       * @param  index
       *         The index from which the bytes will be read
       *
       * @return  The long value at the given index
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit,
       *          minus seven
       */
      public abstract long getLong(int index);
  
      // BEGIN Android-added: {get,put}*Unchecked() accessors.
      abstract long getLongUnchecked(int index);
      abstract void getUnchecked(int pos, long[] dst, int dstOffset, int length);
      // END Android-added: {get,put}*Unchecked() accessors.
  
      /**
       * Absolute <i>put</i> method for writing a long
       * value&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes eight bytes containing the given long value, in the
       * current byte order, into this buffer at the given index.  </p>
       *
       * @param  index
       *         The index at which the bytes will be written
       *
       * @param  value
       *         The long value to be written
       *
       * @return  This buffer
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit,
       *          minus seven
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer putLong(int index, long value);
  
      // BEGIN Android-added: {get,put}*Unchecked() accessors.
      abstract void putLongUnchecked(int index, long value);
      abstract void putUnchecked(int pos, long[] dst, int srcOffset, int length);
      // END Android-added: {get,put}*Unchecked() accessors.
  
      /**
       * Creates a view of this byte buffer as a long buffer.
       *
       * <p> The content of the new buffer will start at this buffer's current
       * position.  Changes to this buffer's content will be visible in the new
       * buffer, and vice versa; the two buffers' position, limit, and mark
       * values will be independent.
       *
       * <p> The new buffer's position will be zero, its capacity and its limit
       * will be the number of bytes remaining in this buffer divided by
       * eight, and its mark will be undefined.  The new buffer will be direct
       * if, and only if, this buffer is direct, and it will be read-only if, and
       * only if, this buffer is read-only.  </p>
       *
       * @return  A new long buffer
       */
      public abstract LongBuffer asLongBuffer();
  
  
      /**
       * Relative <i>get</i> method for reading a float value.
       *
       * <p> Reads the next four bytes at this buffer's current position,
       * composing them into a float value according to the current byte order,
       * and then increments the position by four.  </p>
       *
       * @return  The float value at the buffer's current position
       *
       * @throws  BufferUnderflowException
       *          If there are fewer than four bytes
       *          remaining in this buffer
       */
      public abstract float getFloat();
  
      /**
       * Relative <i>put</i> method for writing a float
       * value&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes four bytes containing the given float value, in the
       * current byte order, into this buffer at the current position, and then
       * increments the position by four.  </p>
       *
       * @param  value
       *         The float value to be written
       *
       * @return  This buffer
       *
       * @throws  BufferOverflowException
       *          If there are fewer than four bytes
       *          remaining in this buffer
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer putFloat(float value);
  
      /**
       * Absolute <i>get</i> method for reading a float value.
       *
       * <p> Reads four bytes at the given index, composing them into a
       * float value according to the current byte order.  </p>
       *
       * @param  index
       *         The index from which the bytes will be read
       *
       * @return  The float value at the given index
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit,
       *          minus three
       */
      public abstract float getFloat(int index);
  
      // BEGIN Android-added: {get,put}*Unchecked() accessors.
      abstract float getFloatUnchecked(int index);
      abstract void getUnchecked(int pos, float[] dst, int dstOffset, int length);
      // END Android-added: {get,put}*Unchecked() accessors.
  
      /**
       * Absolute <i>put</i> method for writing a float
       * value&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes four bytes containing the given float value, in the
       * current byte order, into this buffer at the given index.  </p>
       *
       * @param  index
       *         The index at which the bytes will be written
       *
       * @param  value
       *         The float value to be written
       *
       * @return  This buffer
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit,
       *          minus three
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer putFloat(int index, float value);
  
      // BEGIN Android-added: {get,put}*Unchecked() accessors.
      abstract void putFloatUnchecked(int index, float value);
      abstract void putUnchecked(int pos, float[] dst, int srcOffset, int length);
      // END Android-added: {get,put}*Unchecked() accessors.
  
      /**
       * Creates a view of this byte buffer as a float buffer.
       *
       * <p> The content of the new buffer will start at this buffer's current
       * position.  Changes to this buffer's content will be visible in the new
       * buffer, and vice versa; the two buffers' position, limit, and mark
       * values will be independent.
       *
       * <p> The new buffer's position will be zero, its capacity and its limit
       * will be the number of bytes remaining in this buffer divided by
       * four, and its mark will be undefined.  The new buffer will be direct
       * if, and only if, this buffer is direct, and it will be read-only if, and
       * only if, this buffer is read-only.  </p>
       *
       * @return  A new float buffer
       */
      public abstract FloatBuffer asFloatBuffer();
  
  
      /**
       * Relative <i>get</i> method for reading a double value.
       *
       * <p> Reads the next eight bytes at this buffer's current position,
       * composing them into a double value according to the current byte order,
       * and then increments the position by eight.  </p>
       *
       * @return  The double value at the buffer's current position
       *
       * @throws  BufferUnderflowException
       *          If there are fewer than eight bytes
       *          remaining in this buffer
       */
      public abstract double getDouble();
  
      /**
       * Relative <i>put</i> method for writing a double
       * value&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes eight bytes containing the given double value, in the
       * current byte order, into this buffer at the current position, and then
       * increments the position by eight.  </p>
       *
       * @param  value
       *         The double value to be written
       *
       * @return  This buffer
       *
       * @throws  BufferOverflowException
       *          If there are fewer than eight bytes
       *          remaining in this buffer
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer putDouble(double value);
  
      /**
       * Absolute <i>get</i> method for reading a double value.
       *
       * <p> Reads eight bytes at the given index, composing them into a
       * double value according to the current byte order.  </p>
       *
       * @param  index
       *         The index from which the bytes will be read
       *
       * @return  The double value at the given index
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit,
       *          minus seven
       */
      public abstract double getDouble(int index);
  
      // BEGIN Android-added: {get,put}*Unchecked() accessors.
      abstract double getDoubleUnchecked(int index);
      abstract void getUnchecked(int pos, double[] dst, int dstOffset, int length);
      // END Android-added: {get,put}*Unchecked() accessors.
  
      /**
       * Absolute <i>put</i> method for writing a double
       * value&nbsp;&nbsp;<i>(optional operation)</i>.
       *
       * <p> Writes eight bytes containing the given double value, in the
       * current byte order, into this buffer at the given index.  </p>
       *
       * @param  index
       *         The index at which the bytes will be written
       *
       * @param  value
       *         The double value to be written
       *
       * @return  This buffer
       *
       * @throws  IndexOutOfBoundsException
       *          If <tt>index</tt> is negative
       *          or not smaller than the buffer's limit,
       *          minus seven
       *
       * @throws  ReadOnlyBufferException
       *          If this buffer is read-only
       */
      public abstract ByteBuffer putDouble(int index, double value);
  
      // BEGIN Android-added: {get,put}*Unchecked() accessors.
      abstract void putDoubleUnchecked(int index, double value);
      abstract void putUnchecked(int pos, double[] dst, int srcOffset, int length);
      // END Android-added: {get,put}*Unchecked() accessors.
  
      /**
       * Creates a view of this byte buffer as a double buffer.
       *
       * <p> The content of the new buffer will start at this buffer's current
       * position.  Changes to this buffer's content will be visible in the new
       * buffer, and vice versa; the two buffers' position, limit, and mark
       * values will be independent.
       *
       * <p> The new buffer's position will be zero, its capacity and its limit
       * will be the number of bytes remaining in this buffer divided by
       * eight, and its mark will be undefined.  The new buffer will be direct
       * if, and only if, this buffer is direct, and it will be read-only if, and
       * only if, this buffer is read-only.  </p>
       *
       * @return  A new double buffer
       */
      public abstract DoubleBuffer asDoubleBuffer();
  
      // BEGIN Android-added: isAccessible(), setAccessible(), for use by frameworks (MediaCodec).
      /**
       * @hide
       */
      public boolean isAccessible() {
          return true;
      }
  
      /**
       * @hide
       */
      public void setAccessible(boolean value) {
          throw new UnsupportedOperationException();
      }
      // END Android-added: isAccessible(), setAccessible(), for use by frameworks (MediaCodec).
  }
  