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.Util.AnnotatedOutput;
  import org.jf.dexlib.Util.Input;
  
  import java.util.List;
  import java.util.ArrayList;
  
  public class AnnotationSetRefList extends Item<AnnotationSetRefList> {
      private int hashCode = 0;
  
      private AnnotationSetItem[] annotationSets;
  
       /**
       * Creates a new uninitialized <code>AnnotationSetRefList</code>
       * @param dexFile The <code>DexFile</code> that this item belongs to
       */
      protected AnnotationSetRefList(DexFile dexFile) {
          super(dexFile);
      }
  
      /**
       * Creates a new <code>AnnotationSetRefList</code> for the given annotation sets
       * @param dexFile The <code>DexFile</code> that this item belongs to
       * @param annotationSets The annotationSets for this <code>AnnotationSetRefList</code>
       */
      private AnnotationSetRefList(DexFile dexFile, AnnotationSetItem[] annotationSets) {
          super(dexFile);
          this.annotationSets = annotationSets;
      }
  
      public  AnnotationSetRefList copyAnnotationSetRefList(DexFile dexFile){
  
          ArrayList<AnnotationSetItem> sets=new ArrayList<AnnotationSetItem>(annotationSets.length);
          for(AnnotationSetItem item : annotationSets){
              sets.add(item.copyAnnotationSetItem(dexFile));
          }
          return internAnnotationSetRefList(
                  dexFile,
                  sets);
  
      }
      /**
       * Returns an <code>AnnotationSetRefList</code> for the given annotation sets, and that has been interned into the
       * given <code>DexFile</code>
       * @param dexFile The <code>DexFile</code> that this item belongs to
       * @param annotationSets The annotation sets for this <code>AnnotationSetRefList</code>
       * @return an <code>AnnotationSetItem</code> for the given annotations
       */
      public static AnnotationSetRefList internAnnotationSetRefList(DexFile dexFile,
                                                                         List<AnnotationSetItem> annotationSets) {
          AnnotationSetItem[] annotationSetsArray = new AnnotationSetItem[annotationSets.size()];
          annotationSets.toArray(annotationSetsArray);
          AnnotationSetRefList annotationSetRefList = new AnnotationSetRefList(dexFile, annotationSetsArray);
          return dexFile.AnnotationSetRefListsSection.intern(annotationSetRefList);
      }
  
      /** {@inheritDoc} */
      protected void readItem(Input in, ReadContext readContext) {
          annotationSets = new AnnotationSetItem[in.readInt()];
  
          for (int i=0; i<annotationSets.length; i++) {
              annotationSets[i] = (AnnotationSetItem)readContext.getOptionalOffsettedItemByOffset(
                      ItemType.TYPE_ANNOTATION_SET_ITEM, in.readInt());
          }
      }
  
      /** {@inheritDoc} */
      protected int placeItem(int offset) {
          return offset + 4 + annotationSets.length * 4;
      }
  
      /** {@inheritDoc} */
      protected void writeItem(AnnotatedOutput out) {
          if (out.annotates()) {
              out.annotate(4, "size: 0x" + Integer.toHexString(annotationSets.length) + " (" + annotationSets.length +
                      ")");
              for (AnnotationSetItem annotationSetItem: annotationSets) {
                  out.annotate(4, "annotation_set_off: 0x" + Integer.toHexString(annotationSetItem.getOffset()));
              }
          }
          out.writeInt(annotationSets.length);
          for (AnnotationSetItem annotationSetItem: annotationSets) {
              out.writeInt(annotationSetItem.getOffset());
          }
      }
  
      /** {@inheritDoc} */
      public ItemType getItemType() {
          return ItemType.TYPE_ANNOTATION_SET_REF_LIST;
      }
  
      /** {@inheritDoc} */
      public String getConciseIdentity() {
          return "annotation_set_item @0x" + Integer.toHexString(getOffset());
      }
  
      /** {@inheritDoc} */
      public int compareTo(AnnotationSetRefList o) {
          int comp = annotationSets.length - o.annotationSets.length;
          if (comp != 0) {
              return comp;
          }
  
          for (int i=0; i<annotationSets.length; i++) {
              comp = annotationSets[i].compareTo(o.annotationSets[i]);
              if (comp != 0) {
                  return comp;
              }
          }
  
          return comp;
      }
  
      /**
       * @return An array of the <code>AnnotationSetItem</code> objects that make up this
       * <code>AnnotationSetRefList</code>
       */
      public AnnotationSetItem[] getAnnotationSets() {
          return annotationSets;
      }
  
      /**
       * calculate and cache the hashcode
       */
      private void calcHashCode() {
          hashCode = 0;
          for (AnnotationSetItem annotationSetItem: annotationSets) {
              hashCode = hashCode * 31 + annotationSetItem.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;
          }
  
          AnnotationSetRefList other = (AnnotationSetRefList)o;
          return (this.compareTo(other) == 0);
      }
  }
  