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/*
* Copyright (C) 2011 The Guava Authors
*
* 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.google.common.cache;
import com.google.common.annotations.Beta;
import com.google.common.annotations.GwtCompatible;
/**
* Calculates the weights of cache entries.
*
* @author Charles Fry
* @since 11.0
*/
@Beta
@GwtCompatible
public interface Weigher<K, V> {
/**
* Returns the weight of a cache entry. There is no unit for entry weights; rather they are simply
* relative to each other.
*
* @return the weight of the entry; must be non-negative
*/
int weigh(K key, V value);
}
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