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RedirectingGradleMetadataModuleMetadataSource.java
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RedirectingGradleMetadataModuleMetadataSource.java
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/*
* Copyright 2019 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.repositories.metadata;
import org.gradle.api.artifacts.ModuleIdentifier;
import org.gradle.api.artifacts.component.ModuleComponentIdentifier;
import org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ComponentResolvers;
import org.gradle.api.internal.artifacts.repositories.resolver.ExternalResourceArtifactResolver;
import org.gradle.api.internal.artifacts.repositories.resolver.ResourcePattern;
import org.gradle.api.internal.artifacts.repositories.resolver.VersionLister;
import org.gradle.internal.component.external.model.ModuleDependencyMetadata;
import org.gradle.internal.component.external.model.MutableModuleComponentResolveMetadata;
import org.gradle.internal.component.model.ComponentOverrideMetadata;
import org.gradle.internal.resolve.result.BuildableModuleComponentMetaDataResolveResult;
import org.gradle.internal.resolve.result.BuildableModuleVersionListingResolveResult;
import java.util.List;
/**
* A module metadata source which is a pure performance optimization. Because today in the wild there
* are very few Gradle metadata sources, this source will first try to get a POM file (or an Ivy file)
* and if it finds a marker in the POM (Ivy), it will use Gradle metadata instead.
*
* It also means that we're going to pay a small price if Gradle metadata is present: we would fetch
* a POM file and parse it, then fetch Gradle metadata and parse it (doing twice the work).
*/
public class RedirectingGradleMetadataModuleMetadataSource extends AbstractMetadataSource<MutableModuleComponentResolveMetadata> {
private final MetadataSource<?> delegate;
private final MetadataSource<MutableModuleComponentResolveMetadata> gradleModuleMetadataSource;
public RedirectingGradleMetadataModuleMetadataSource(MetadataSource<?> delegate, MetadataSource<MutableModuleComponentResolveMetadata> gradleModuleMetadataSource) {
this.delegate = delegate;
this.gradleModuleMetadataSource = gradleModuleMetadataSource;
}
@Override
public MutableModuleComponentResolveMetadata create(String repositoryName, ComponentResolvers componentResolvers, ModuleComponentIdentifier moduleComponentIdentifier, ComponentOverrideMetadata prescribedMetaData, ExternalResourceArtifactResolver artifactResolver, BuildableModuleComponentMetaDataResolveResult result) {
MutableModuleComponentResolveMetadata metadata = delegate.create(repositoryName, componentResolvers, moduleComponentIdentifier, prescribedMetaData, artifactResolver, result);
if (result.shouldUseGradleMetatada()) {
MutableModuleComponentResolveMetadata resolveMetadata = gradleModuleMetadataSource.create(repositoryName, componentResolvers, moduleComponentIdentifier, prescribedMetaData, artifactResolver, result);
if (resolveMetadata != null) {
return resolveMetadata;
}
}
return metadata;
}
@Override
public void listModuleVersions(ModuleDependencyMetadata dependency, ModuleIdentifier module, List<ResourcePattern> ivyPatterns, List<ResourcePattern> artifactPatterns, VersionLister versionLister, BuildableModuleVersionListingResolveResult result) {
delegate.listModuleVersions(dependency, module, ivyPatterns, artifactPatterns, versionLister, result);
}
}