content: /*
   * Copyright (C) 2016 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.android.ahat.heapdump;
  
  /**
   * An interface for objects that have corresponding objects in a baseline heap
   * dump.
   */
  public interface Diffable<T> {
    /**
     * Return the baseline object that corresponds to this one.
     */
    T getBaseline();
  
    /**
     * Returns true if this is a placeholder object.
     * A placeholder object is used to indicate there is some object in the
     * baseline heap dump that is not in this heap dump. In that case, we create
     * a dummy place holder object in this heap dump as an indicator of the
     * object removed from the baseline heap dump.
     */
    boolean isPlaceHolder();
  }
  
  