org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.conflicts.UpgradeCapabilityResolver.java Source code

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Here is the source code for org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.conflicts.UpgradeCapabilityResolver.java

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/*
 * Copyright 2018 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.graph.conflicts;

import com.google.common.collect.Sets;
import org.gradle.api.capabilities.Capability;
import org.gradle.util.VersionNumber;

import java.util.Collection;
import java.util.Comparator;
import java.util.Set;

/**
 * A resolver which will automatically upgrade a capability to its latest version. It will evict the components
 * which are not associated with the selected version, but will not perform a selection by itself.
 */
public class UpgradeCapabilityResolver implements CapabilitiesConflictHandler.Resolver {
    @Override
    public void resolve(CapabilitiesConflictHandler.ResolutionDetails details) {
        Collection<? extends Capability> capabilityVersions = details.getCapabilityVersions();
        if (capabilityVersions.size() > 1) {
            Set<Capability> sorted = Sets.newTreeSet(new Comparator<Capability>() {
                @Override
                public int compare(Capability o1, Capability o2) {
                    VersionNumber v1 = VersionNumber.parse(o1.getVersion());
                    VersionNumber v2 = VersionNumber.parse(o2.getVersion());
                    return v2.compareTo(v1);
                }
            });
            sorted.addAll(capabilityVersions);
            boolean first = true;
            for (Capability capability : sorted) {
                if (!first) {
                    Collection<? extends CapabilitiesConflictHandler.CandidateDetails> candidates = details
                            .getCandidates(capability);
                    for (CapabilitiesConflictHandler.CandidateDetails candidate : candidates) {
                        candidate.evict();
                    }
                }
                first = false;
            }
        }
    }
}