com.hazelcast.map.impl.OwnedEntryCostEstimatorFactory Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2018, Hazelcast, 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 com.hazelcast.map.impl;
import com.hazelcast.config.InMemoryFormat;
import static com.hazelcast.config.InMemoryFormat.BINARY;
/**
* Static factory methods for various entry cost estimators.
*/
public final class OwnedEntryCostEstimatorFactory {
/**
* Returns zero for all estimations.
*/
private static final EntryCostEstimator ZERO_SIZE_ESTIMATOR = new ZeroEntryCostEstimator();
private OwnedEntryCostEstimatorFactory() {
}
public static EntryCostEstimator createMapSizeEstimator(InMemoryFormat inMemoryFormat) {
if (BINARY.equals(inMemoryFormat)) {
return (EntryCostEstimator) new BinaryMapEntryCostEstimator();
}
return ZERO_SIZE_ESTIMATOR;
}
private static class ZeroEntryCostEstimator
implements EntryCostEstimator {
@Override
public long getEstimate() {
return 0;
}
@Override
public void adjustEstimateBy(long adjustment) {
}
@Override
public long calculateValueCost(Object value) {
return 0;
}
@Override
public long calculateEntryCost(Object key, Object value) {
return 0;
}
@Override
public void reset() {
}
}
}