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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;
/**
* Utility {@link Weigher} implementations intended for use in testing.
*
* @author Charles Fry
*/
public class TestingWeighers {
/** Returns a {@link Weigher} that returns the given {@code constant} for every request. */
static Weigher<Object, Object> constantWeigher(int constant) {
return new ConstantWeigher(constant);
}
/** Returns a {@link Weigher} that uses the integer key as the weight. */
static Weigher<Integer, Object> intKeyWeigher() {
return new IntKeyWeigher();
}
/** Returns a {@link Weigher} that uses the integer value as the weight. */
static Weigher<Object, Integer> intValueWeigher() {
return new IntValueWeigher();
}
static final class ConstantWeigher implements Weigher<Object, Object> {
private final int constant;
ConstantWeigher(int constant) {
this.constant = constant;
}
@Override
public int weigh(Object key, Object value) {
return constant;
}
}
static final class IntKeyWeigher implements Weigher<Integer, Object> {
@Override
public int weigh(Integer key, Object value) {
return key;
}
}
static final class IntValueWeigher implements Weigher<Object, Integer> {
@Override
public int weigh(Object key, Integer value) {
return value;
}
}
}
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