content: /*
   * Copyright (C) 2008 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.taobao.android.dx.dex.file;
  
  import com.taobao.android.dx.rop.annotation.Annotation;
  import com.taobao.android.dx.rop.annotation.Annotations;
  import com.taobao.android.dx.util.AnnotatedOutput;
  import com.taobao.android.dx.util.Hex;
  
  /**
   * Set of annotations, where no annotation type appears more than once.
   */
  public final class AnnotationSetItem extends OffsettedItem {
      /** the required alignment for instances of this class */
      private static final int ALIGNMENT = 4;
  
      /** the size of an entry int the set: one {@code uint} */
      private static final int ENTRY_WRITE_SIZE = 4;
  
      /** {@code non-null;} the set of annotations */
      private final Annotations annotations;
  
      /**
       * {@code non-null;} set of annotations as individual items in an array.
       * <b>Note:</b> The contents have to get sorted by type id before
       * writing.
       */
      private final AnnotationItem[] items;
  
      /**
       * Constructs an instance.
       *
       * @param annotations {@code non-null;} set of annotations
       * @param dexFile {@code non-null;} dex output
       */
      public AnnotationSetItem(Annotations annotations, DexFile dexFile) {
          super(ALIGNMENT, writeSize(annotations));
  
          this.annotations = annotations;
          this.items = new AnnotationItem[annotations.size()];
  
          int at = 0;
          for (Annotation a : annotations.getAnnotations()) {
              items[at] = new AnnotationItem(a, dexFile);
              at++;
          }
      }
  
      /**
       * Gets the write size for the given set.
       *
       * @param annotations {@code non-null;} the set
       * @return {@code > 0;} the write size
       */
      private static int writeSize(Annotations annotations) {
          // This includes an int size at the start of the list.
  
          try {
              return (annotations.size() * ENTRY_WRITE_SIZE) + 4;
          } catch (NullPointerException ex) {
              // Elucidate the exception.
              throw new NullPointerException("list == null");
          }
      }
  
      /**
       * Gets the underlying annotations of this instance
       *
       * @return {@code non-null;} the annotations
       */
      public Annotations getAnnotations() {
          return annotations;
      }
  
      /** {@inheritDoc} */
      @Override
      public int hashCode() {
          return annotations.hashCode();
      }
  
      /** {@inheritDoc} */
      @Override
      protected int compareTo0(OffsettedItem other) {
          AnnotationSetItem otherSet = (AnnotationSetItem) other;
  
          return annotations.compareTo(otherSet.annotations);
      }
  
      /** {@inheritDoc} */
      @Override
      public ItemType itemType() {
          return ItemType.TYPE_ANNOTATION_SET_ITEM;
      }
  
      /** {@inheritDoc} */
      @Override
      public String toHuman() {
          return annotations.toString();
      }
  
      /** {@inheritDoc} */
      public void addContents(DexFile file) {
          MixedItemSection byteData = file.getByteData();
          int size = items.length;
  
          for (int i = 0; i < size; i++) {
              items[i] = byteData.intern(items[i]);
          }
      }
  
      /** {@inheritDoc} */
      @Override
      protected void place0(Section addedTo, int offset) {
          // Sort the array to be in type id index order.
          AnnotationItem.sortByTypeIdIndex(items);
      }
  
      /** {@inheritDoc} */
      @Override
      protected void writeTo0(DexFile file, AnnotatedOutput out) {
          boolean annotates = out.annotates();
          int size = items.length;
  
          if (annotates) {
              out.annotate(0, offsetString() + " annotation set");
              out.annotate(4, "  size: " + Hex.u4(size));
          }
  
          out.writeInt(size);
  
          for (int i = 0; i < size; i++) {
              AnnotationItem item = items[i];
              int offset = item.getAbsoluteOffset();
  
              if (annotates) {
                  out.annotate(4, "  entries[" + Integer.toHexString(i) + "]: " +
                          Hex.u4(offset));
                  items[i].annotateTo(out, "    ");
              }
  
              out.writeInt(offset);
          }
      }
  }
  