content: /*
   * [The "BSD licence"]
   * Copyright (c) 2010 Ben Gruver (JesusFreke)
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package org.jf.dexlib.EncodedValue;
  
  import org.jf.dexlib.*;
  import org.jf.dexlib.Util.AnnotatedOutput;
  import org.jf.dexlib.Util.Input;
  
  public abstract class EncodedValue implements Comparable<EncodedValue> {
      /**
       * Writes this <code>EncodedValue</code> to the given <code>AnnotatedOutput</code> object
       * @param out the <code>AnnotatedOutput</code> object to write to
       */
      public abstract void writeValue(AnnotatedOutput out);
  
      /**
       * Calculates the size of this encoded value and returns offset + size;
       * @param offset The offset to place this encoded value
       * @return the offset immediately after this encoded value
       */
      public abstract int placeValue(int offset);
  
  
      public static EncodedValue readEncodedValue(DexFile dexFile, Input in) {
          Byte b = in.readByte();
          ValueType valueType = ValueType.fromByte((byte)(b & 0x1f));
          byte valueArg = (byte)((b & 0xFF) >> 5);
  
          switch (valueType) {
              case VALUE_BYTE:
                  return new ByteEncodedValue(in);
              case VALUE_SHORT:
                  return new ShortEncodedValue(in, valueArg);
              case VALUE_CHAR:
                  return new CharEncodedValue(in, valueArg);
              case VALUE_INT:
                  return new IntEncodedValue(in, valueArg);
              case VALUE_LONG:
                  return new LongEncodedValue(in, valueArg);
              case VALUE_FLOAT:
                  return new FloatEncodedValue(in, valueArg);
              case VALUE_DOUBLE:
                  return new DoubleEncodedValue(in, valueArg);
              case VALUE_STRING:
                  return new StringEncodedValue(dexFile, in, valueArg);
              case VALUE_TYPE:
                  return new TypeEncodedValue(dexFile, in, valueArg);
              case VALUE_FIELD:
                  return new FieldEncodedValue(dexFile, in, valueArg);
              case VALUE_METHOD:
                  return new MethodEncodedValue(dexFile, in, valueArg);
              case VALUE_ENUM:
                  return new EnumEncodedValue(dexFile, in, valueArg);
              case VALUE_ARRAY:
                  return new ArrayEncodedValue(dexFile, in);
              case VALUE_ANNOTATION:
                  return new AnnotationEncodedValue(dexFile, in);
              case VALUE_NULL:
                  return NullEncodedValue.NullValue;
              case VALUE_BOOLEAN:
                  return BooleanEncodedValue.getBooleanEncodedValue(valueArg);
          }
          return null;
      }
  
  
      public static EncodedValue copyEncodedValue(DexFile dexFile,EncodedValue value) {
  
          switch (value.getValueType()) {
              case VALUE_BYTE:
                  return new ByteEncodedValue(((ByteEncodedValue)value).value);
              case VALUE_SHORT:
                  return new ShortEncodedValue(((ShortEncodedValue)value).value);
              case VALUE_CHAR:
                  return new CharEncodedValue(((CharEncodedValue)value).value);
              case VALUE_INT:
                  return new IntEncodedValue(((IntEncodedValue)value).value);
              case VALUE_LONG:
                  return new LongEncodedValue(((LongEncodedValue)value).value);
              case VALUE_FLOAT:
                  return new FloatEncodedValue(((FloatEncodedValue)value).value);
              case VALUE_DOUBLE:
                  return new DoubleEncodedValue(((DoubleEncodedValue)value).value);
              case VALUE_STRING:
                  return new StringEncodedValue(
                          StringIdItem.internStringIdItem(
                              dexFile,
                              ((StringEncodedValue)value).value.getStringValue()
                              )
                          );
                          
              case VALUE_TYPE:
                  return new TypeEncodedValue(
                          TypeIdItem.internTypeIdItem(
                              dexFile,
                              ((TypeEncodedValue)value).value.getTypeDescriptor()
                              )
                          );
              case VALUE_FIELD:
                  return new FieldEncodedValue(
                          ((FieldEncodedValue)value).value.internFieldIdItem(
                              dexFile
                              )
                          );
                          
              case VALUE_METHOD:
                  return new MethodEncodedValue(
                          ((MethodEncodedValue)value).value.internMethodIdItem(
                              dexFile
                              )
                          );
              case VALUE_ENUM:
                  return new EnumEncodedValue(
                          ((EnumEncodedValue)value).value.internFieldIdItem(
                              dexFile
                              )
                          );
              case VALUE_ARRAY:
                  EncodedValue[] values=((ArrayEncodedValue)value).values;
                  EncodedValue[] newValues=new EncodedValue[values.length];
                  for(int i=0,len=newValues.length;i<len;i++){
                      newValues[i]=copyEncodedValue(dexFile,values[i]);
                  }
                  return new ArrayEncodedValue(newValues);
  
              case VALUE_ANNOTATION:
                  return ((AnnotationEncodedValue)value).copyAnnotationEncodedValue(dexFile);
              case VALUE_NULL:
                  return NullEncodedValue.NullValue;
              case VALUE_BOOLEAN:
                  return BooleanEncodedValue.getBooleanEncodedValue(((BooleanEncodedValue)value).value);
          }
          return null;
      }
  
  
  
  
      /** {@inheritDoc} */
      public int compareTo(EncodedValue o) {
          int comp = getValueType().compareTo(o.getValueType());
          if (comp == 0) {
              comp = compareValue(o);
          }
          return comp;
      }
  
      /**
       * Compare the value of this <code>EncodedValue</code> against the value of the given <EncodedValue>, which
       * is guaranteed to be of the same type as this <code>EncodedValue</code>
       * @param o The <code>EncodedValue</code> to compare against
       * @return A standard comparison integer value
       */
      protected abstract int compareValue(EncodedValue o);
  
      /**
       * @return the <code>ValueType</code> representing the type of this <code>EncodedValue</code>
       */
      public abstract ValueType getValueType();
  
      @Override
      public boolean equals(Object o) {
          if (this==o) {
              return true;
          }
          if (o==null || !(o instanceof EncodedValue)) {
              return false;
          }
  
          return this.compareTo((EncodedValue)o) == 0;
      }
  }
  