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;
  
  import org.jf.dexlib.EncodedValue.ArrayEncodedSubValue;
  import org.jf.dexlib.Util.AnnotatedOutput;
  import org.jf.dexlib.Util.Input;
  
  public class EncodedArrayItem extends Item<EncodedArrayItem> {
      private int hashCode = 0;
  
      private ArrayEncodedSubValue encodedArray;
  
      /**
       * Creates a new uninitialized <code>EncodedArrayItem</code>
       * @param dexFile The <code>DexFile</code> that this item belongs to
       */
      protected EncodedArrayItem(DexFile dexFile) {
          super(dexFile);
      }
  
      /**
       * Creates a new <code>EncodedArrayItem</code> with the given values
       * @param dexFile The <code>DexFile</code> that this item belongs to
       * @param encodedArray The encoded array value
       */
      private EncodedArrayItem(DexFile dexFile, ArrayEncodedSubValue encodedArray) {
          super(dexFile);
          this.encodedArray = encodedArray;
      }
  
      /**
       * Returns an <code>EncodedArrayItem</code> for the given values, and that has been interned into the given
       * <code>DexFile</code>
       * @param dexFile The <code>DexFile</code> that this item belongs to
       * @param encodedArray The encoded array value
       * @return an <code>EncodedArrayItem</code> for the given values, and that has been interned into the given
       */
      public static EncodedArrayItem internEncodedArrayItem(DexFile dexFile, ArrayEncodedSubValue encodedArray) {
          EncodedArrayItem encodedArrayItem = new EncodedArrayItem(dexFile, encodedArray);
          return dexFile.EncodedArraysSection.intern(encodedArrayItem);
      }
  
      /** {@inheritDoc} */
      protected void readItem(Input in, ReadContext readContext) {
          encodedArray = new ArrayEncodedSubValue(dexFile, in);
      }
  
      /** {@inheritDoc} */
      protected int placeItem(int offset) {
          return encodedArray.placeValue(offset);
      }
  
      /** {@inheritDoc} */
      protected void writeItem(AnnotatedOutput out) {
          encodedArray.writeValue(out);
      }
  
      /** {@inheritDoc} */
      public ItemType getItemType() {
          return ItemType.TYPE_ENCODED_ARRAY_ITEM;
      }
  
      /** {@inheritDoc} */
      public String getConciseIdentity() {
          return "encoded_array @0x" + Integer.toHexString(getOffset());
      }
  
      /** {@inheritDoc} */
      public int compareTo(EncodedArrayItem encodedArrayItem) {
          return encodedArray.compareTo(encodedArrayItem.encodedArray);
      }
  
      /**
       * @return The encoded array value
       */
      public ArrayEncodedSubValue getEncodedArray() {
          return encodedArray;
      }
  
      /**
       * calculate and cache the hashcode
       */
      private void calcHashCode() {
          hashCode = encodedArray.hashCode();
      }
  
      @Override
      public int hashCode() {
          //there's a small possibility that the actual hash code will be 0. If so, we'll
          //just end up recalculating it each time
          if (hashCode == 0)
              calcHashCode();
          return hashCode;
      }
  
      @Override
      public boolean equals(Object o) {
          if (this==o) {
              return true;
          }
          if (o==null || !this.getClass().equals(o.getClass())) {
              return false;
          }
  
          EncodedArrayItem other = (EncodedArrayItem)o;
          return (encodedArray.compareTo(other.encodedArray) == 0);
      }
  }
  