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.util.AnnotatedOutput;
  import com.taobao.android.dx.util.Hex;
  
  /**
   * Indirect reference to an {@link AnnotationSetItem}.
   */
  public final class AnnotationSetRefItem extends OffsettedItem {
      /** the required alignment for instances of this class */
      private static final int ALIGNMENT = 4;
  
      /** write size of this class, in bytes */
      private static final int WRITE_SIZE = 4;
  
      /** {@code non-null;} the annotation set to refer to */
      private AnnotationSetItem annotations;
  
      /**
       * Constructs an instance.
       *
       * @param annotations {@code non-null;} the annotation set to refer to
       */
      public AnnotationSetRefItem(AnnotationSetItem annotations) {
          super(ALIGNMENT, WRITE_SIZE);
  
          if (annotations == null) {
              throw new NullPointerException("annotations == null");
          }
  
          this.annotations = annotations;
      }
  
      /** {@inheritDoc} */
      @Override
      public ItemType itemType() {
          return ItemType.TYPE_ANNOTATION_SET_REF_ITEM;
      }
  
      /** {@inheritDoc} */
      public void addContents(DexFile file) {
          MixedItemSection wordData = file.getWordData();
  
          annotations = wordData.intern(annotations);
      }
  
      /** {@inheritDoc} */
      @Override
      public String toHuman() {
          return annotations.toHuman();
      }
  
      /** {@inheritDoc} */
      @Override
      protected void writeTo0(DexFile file, AnnotatedOutput out) {
          int annotationsOff = annotations.getAbsoluteOffset();
  
          if (out.annotates()) {
              out.annotate(4, "  annotations_off: " + Hex.u4(annotationsOff));
          }
  
          out.writeInt(annotationsOff);
      }
  }
  