org.gradle.api.internalivyservice.dependencysubstitution.CachingDependencySubstitutionApplicator Maven / Gradle / Ivy
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/*
* Copyright 2017 the original author or 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 org.gradle.api.internal.artifacts.ivyservice.dependencysubstitution;
import com.google.common.collect.Maps;
import org.gradle.api.artifacts.component.ComponentSelector;
import org.gradle.internal.component.model.DependencyMetadata;
import javax.annotation.concurrent.NotThreadSafe;
import java.util.Map;
/**
* This caching substitutor is not intended to be called from places where it can be executed concurrently.
*/
@NotThreadSafe
public class CachingDependencySubstitutionApplicator implements DependencySubstitutionApplicator {
private final DependencySubstitutionApplicator delegate;
private final Map cache = Maps.newHashMap();
public CachingDependencySubstitutionApplicator(DependencySubstitutionApplicator delegate) {
this.delegate = delegate;
}
@Override
public SubstitutionResult apply(DependencyMetadata dependency) {
ComponentSelector selector = dependency.getSelector();
SubstitutionResult application = cache.get(selector);
if (application == null) {
application = delegate.apply(dependency);
cache.put(selector, application);
}
return application;
}
}