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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
 *
 * 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. See accompanying
 * LICENSE file.
 */
package com.gemstone.gemfire.internal.cache.persistence.query.mock;

import java.util.Comparator;

import com.gemstone.gemfire.internal.cache.CachedDeserializable;

/**
 * Compare two cached deserializable objects by unwrapping
 * the underlying object.
 * 
 * If either object is not a cached deserializable, just use
 * the object directly.
 * @author dsmith
 *
 */
class CachedDeserializableComparator implements Comparator {

  private Comparator comparator;

  public CachedDeserializableComparator(Comparator comparator) {
    this.comparator = comparator;
  }

  @Override
  public int compare(Object o1, Object o2) {
    if(o1 instanceof CachedDeserializable) {
      o1 = ((CachedDeserializable) o1).getDeserializedForReading();
    }
    
    if(o2 instanceof CachedDeserializable) {
      o2 = ((CachedDeserializable) o2).getDeserializedForReading();
    }
    
    return comparator.compare(o1, o2);
    
  }
  
} 















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