/*
* Copyright 2016 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.resolveengine;
import org.gradle.api.artifacts.component.ProjectComponentIdentifier;
import org.gradle.internal.component.model.ComponentResolveMetadata;
import java.util.ArrayList;
import java.util.Collection;
class ProjectDependencyForcingResolver implements ModuleConflictResolver {
private final ModuleConflictResolver delegate;
ProjectDependencyForcingResolver(ModuleConflictResolver delegate) {
this.delegate = delegate;
}
@Override
public <T extends ComponentResolutionState> T select(Collection<? extends T> candidates) {
// the collection will only be initialized if more than one project candidate is found
Collection<T> projectCandidates = null;
T foundProjectCandidate = null;
// fine one or more project dependencies among conflicting modules
for(T candidate: candidates) {
ComponentResolveMetadata metaData = candidate.getMetaData();
if (metaData!=null && metaData.getComponentId() instanceof ProjectComponentIdentifier) {
if (foundProjectCandidate==null) {
// found the first project dependency
foundProjectCandidate = candidate;
} else {
// found more than one
if (projectCandidates==null) {
projectCandidates = new ArrayList<T>();
projectCandidates.add(foundProjectCandidate);
}
projectCandidates.add(candidate);
}
}
}
// if more than one conflicting project dependencies
// let the delegate resolver select among them
if (projectCandidates!=null) {
return delegate.select(projectCandidates);
}
// if found only one project dependency - return it, otherwise call the next resolver
return foundProjectCandidate!=null ? foundProjectCandidate : delegate.select(candidates);
}
}