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/*
 * Copyright 2010 Google 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.
 */
package mssql.googlecode.concurrentlinkedhashmap;

/**
 * A class that can determine the weight of a value. The total weight threshold
 * is used to determine when an eviction is required.
 *
 * @author [email protected] (Ben Manes)
 * @see 
 *      http://code.google.com/p/concurrentlinkedhashmap/
 */
public interface Weigher {

  /**
   * Measures an object's weight to determine how many units of capacity that
   * the value consumes. A value must consume a minimum of one unit.
   *
   * @param value the object to weigh
   * @return the object's weight
   */
  int weightOf(V value);
}




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