/*
* Copyright 2015 Ben Manes. 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.github.benmanes.caffeine.cache.node;
import static com.github.benmanes.caffeine.cache.Specifications.NODE;
import com.github.benmanes.caffeine.cache.Feature;
/**
* Adds the access and write deques, if needed, to the node.
*
* @author ben.manes@gmail.com (Ben Manes)
*/
public final class AddDeques extends NodeRule {
@Override
protected boolean applies() {
return true;
}
@Override
protected void execute() {
if (!Feature.usesAccessOrderEdenDeque(context.parentFeatures)
&& Feature.usesAccessOrderEdenDeque(context.generateFeatures)) {
addFieldAndGetter("previousInAccessOrder");
addFieldAndGetter("nextInAccessOrder");
}
if (!Feature.usesWriteOrderDeque(context.parentFeatures)
&& Feature.usesWriteOrderDeque(context.generateFeatures)) {
addFieldAndGetter("previousInWriteOrder");
addFieldAndGetter("nextInWriteOrder");
}
}
/** Adds a simple field, accessor, and mutator for the variable. */
private void addFieldAndGetter(String varName) {
context.nodeSubtype.addField(NODE, varName)
.addMethod(newGetter(Strength.STRONG, NODE, varName, Visibility.IMMEDIATE))
.addMethod(newSetter(NODE, varName, Visibility.IMMEDIATE));
}
}