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.Arrays;
  import java.util.Comparator;
  import java.util.List;
  import java.util.ArrayList;
  
  public class AnnotationSetItem extends Item<AnnotationSetItem> {
      private int hashCode = 0;
  
      private AnnotationItem[] annotations;
  
      /**
       * Creates a new uninitialized <code>AnnotationSetItem</code>
       * @param dexFile The <code>DexFile</code> that this item belongs to
       */
      protected AnnotationSetItem(DexFile dexFile) {
          super(dexFile);
      }
  
      /**
       * Creates a new <code>AnnotationSetItem</code> for the given annotations
       * @param dexFile The <code>DexFile</code> that this item belongs to
       * @param annotations The annotations for this <code>AnnotationSetItem</code>
       */
      private AnnotationSetItem(DexFile dexFile, AnnotationItem[] annotations) {
          super(dexFile);
          this.annotations = annotations;
      }
  
      /**
       * Returns an <code>AnnotationSetItem</code> for the given annotations, and that has been interned into the given
       * <code>DexFile</code>
       * @param dexFile The <code>DexFile</code> that this item belongs to
       * @param annotations The annotations for this <code>AnnotationSetItem</code>
       * @return an <code>AnnotationSetItem</code> for the given annotations
       */
      public static AnnotationSetItem internAnnotationSetItem(DexFile dexFile, List<AnnotationItem> annotations) {
          AnnotationSetItem annotationSetItem;
          if (annotations == null) {
              annotationSetItem = new AnnotationSetItem(dexFile, new AnnotationItem[0]);
          } else {
              AnnotationItem[] annotationsArray = new AnnotationItem[annotations.size()];
              annotations.toArray(annotationsArray);
              annotationSetItem = new AnnotationSetItem(dexFile, annotationsArray);
          }
          return dexFile.AnnotationSetsSection.intern(annotationSetItem);
      }
  
      public AnnotationSetItem copyAnnotationSetItem(DexFile dexFile){
  
          ArrayList<AnnotationItem> annotationSetItem=new ArrayList<AnnotationItem>(annotations.length);
          for(AnnotationItem item:annotations){
              annotationSetItem.add(item.copyAnnotationItem(dexFile));
          }
          return internAnnotationSetItem(
                  dexFile,
                  annotationSetItem);
      }
  
  
      /** {@inheritDoc} */
      protected void readItem(Input in, ReadContext readContext) {
          annotations = new AnnotationItem[in.readInt()];
  
          for (int i=0; i<annotations.length; i++) {
              annotations[i] = (AnnotationItem)readContext.getOffsettedItemByOffset(ItemType.TYPE_ANNOTATION_ITEM,
                      in.readInt());
          }
      }
  
      /** {@inheritDoc} */
      protected int placeItem(int offset) {
          return offset + 4 + annotations.length * 4;
      }
  
      /** {@inheritDoc} */
      protected void writeItem(AnnotatedOutput out) {
          Arrays.sort(annotations, new Comparator<AnnotationItem>() {
              public int compare(AnnotationItem annotationItem, AnnotationItem annotationItem2) {
                  int annotationItemIndex = annotationItem.getEncodedAnnotation().annotationType.getIndex();
                  int annotationItemIndex2 = annotationItem2.getEncodedAnnotation().annotationType.getIndex();
                  if (annotationItemIndex < annotationItemIndex2) {
                      return -1;
                  } else if (annotationItemIndex == annotationItemIndex2) {
                      return 0;
                  }
                  return 1;
              }
          });
  
  
          if (out.annotates()) {
              out.annotate(4, "size: 0x" + Integer.toHexString(annotations.length) + " (" + annotations.length + ")");
              for (AnnotationItem annotationItem: annotations) {
                  out.annotate(4, "annotation_off: 0x" + Integer.toHexString(annotationItem.getOffset()) + " - " +
                          annotationItem.getEncodedAnnotation().annotationType.getTypeDescriptor());
              }
          }
          out.writeInt(annotations.length);
          for (AnnotationItem annotationItem: annotations) {
              out.writeInt(annotationItem.getOffset());
          }
      }
  
      /** {@inheritDoc} */
      public ItemType getItemType() {
          return ItemType.TYPE_ANNOTATION_SET_ITEM;
      }
  
      /** {@inheritDoc} */
      public String getConciseIdentity() {
          return "annotation_set_item @0x" + Integer.toHexString(getOffset());
      }
  
  /** {@inheritDoc} */
      public int compareTo(AnnotationSetItem o) {
          if (o == null) {
              return 1;
          }
  
          int comp = annotations.length - o.annotations.length;
          if (comp == 0) {
              for (int i=0; i<annotations.length; i++) {
                  comp = annotations[i].compareTo(o.annotations[i]);
                  if (comp != 0) {
                      return comp;
                  }
              }
          }
          return comp;
      }
  
      /**
       * @return An array of the <code>AnnotationItem</code> objects in this <code>AnnotationSetItem</code>
       */
      public AnnotationItem[] getAnnotations() {
          return annotations;
      }
  
      /**
       * calculate and cache the hashcode
       */
      private void calcHashCode() {
          hashCode = 0;
          for (AnnotationItem annotationItem: annotations) {
              hashCode = hashCode * 31 + annotationItem.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;
          }
  
          AnnotationSetItem other = (AnnotationSetItem)o;
          return (this.compareTo(other) == 0);
      }
  }
  