content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE 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 for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * Copyright (c) 2005, 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.
   */
  
  package jaxp.sun.xml.internal.stream.util;
  
  import java.lang.ref.*;
  
  /**
   * Buffer allocator for buffers of sizes 128 B, 2 KB and 8 KB. Includes
   * methods for allocating and freeing buffers.
   *
   * @author Binu.John@sun.com
   * @author Santiago.PericasGeertsen@sun.com
   */
  public class BufferAllocator {
      public static int SMALL_SIZE_LIMIT = 128;
      public static int MEDIUM_SIZE_LIMIT = 2048;
      public static int LARGE_SIZE_LIMIT = 8192;
  
      char[] smallCharBuffer;
      char[] mediumCharBuffer;
      char[] largeCharBuffer;
  
      byte[] smallByteBuffer;
      byte[] mediumByteBuffer;
      byte[] largeByteBuffer;
  
      public BufferAllocator() {
      }
  
      public char[] getCharBuffer(int size) {
          if (size <= SMALL_SIZE_LIMIT) {
              char[] buffer = smallCharBuffer;
              smallCharBuffer = null;
              return buffer;
          }
          else if (size <= MEDIUM_SIZE_LIMIT) {
              char[] buffer = mediumCharBuffer;
              mediumCharBuffer = null;
              return buffer;
          }
          else if (size <= LARGE_SIZE_LIMIT) {
              char[] buffer = largeCharBuffer;
              largeCharBuffer = null;
              return buffer;
          }
          return null;
      }
  
      public void returnCharBuffer(char[] c) {
          if (c == null) {
              return;
          }
          if (c.length <= SMALL_SIZE_LIMIT) {
              smallCharBuffer = c;
          }
          else if (c.length <= MEDIUM_SIZE_LIMIT) {
              mediumCharBuffer = c;
          }
          else if (c.length <= LARGE_SIZE_LIMIT) {
              largeCharBuffer = c;
          }
      }
  
      public byte[] getByteBuffer(int size) {
          if (size <= SMALL_SIZE_LIMIT) {
              byte[] buffer = smallByteBuffer;
              smallByteBuffer = null;
              return buffer;
          }
          else if (size <= MEDIUM_SIZE_LIMIT) {
              byte[] buffer = mediumByteBuffer;
              mediumByteBuffer = null;
              return buffer;
          }
          else if (size <= LARGE_SIZE_LIMIT) {
              byte[] buffer = largeByteBuffer;
              largeByteBuffer = null;
              return buffer;
          }
          return null;
      }
  
      public void returnByteBuffer(byte[] b) {
          if (b == null) {
              return;
          }
          if (b.length <= SMALL_SIZE_LIMIT) {
              smallByteBuffer = b;
          }
          else if (b.length <= MEDIUM_SIZE_LIMIT) {
              mediumByteBuffer = b;
          }
          else if (b.length <= LARGE_SIZE_LIMIT) {
              largeByteBuffer = b;
          }
      }
  
  }
  