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AbstractLazyModuleComponentResolveMetadata.java
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AbstractLazyModuleComponentResolveMetadata.java
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/*
* Copyright 2013 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.internal.component.external.model;
import com.google.common.base.Objects;
import com.google.common.base.Optional;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Maps;
import org.gradle.api.InvalidUserDataException;
import org.gradle.api.artifacts.component.ModuleComponentIdentifier;
import org.gradle.internal.component.external.descriptor.Configuration;
import org.gradle.internal.component.model.ConfigurationMetadata;
import org.gradle.internal.component.model.ExcludeMetadata;
import org.gradle.internal.component.model.ModuleConfigurationMetadata;
import org.gradle.internal.component.model.ModuleSources;
import java.util.Map;
import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collectors;
/**
* Common base class for the lazy versions of {@link ModuleComponentResolveMetadata} implementations.
*
* The lazy part is about the application of {@link VariantMetadataRules} which are applied lazily
* when configuration or variant data is required by consumers.
*
* This type hierarchy is used whenever the {@code ModuleComponentResolveMetadata} does not need to outlive
* the build execution.
*/
public abstract class AbstractLazyModuleComponentResolveMetadata extends AbstractModuleComponentResolveMetadata {
private final VariantMetadataRules variantMetadataRules;
private final ImmutableMap<String, Configuration> configurationDefinitions;
private Optional<ImmutableList<? extends ConfigurationMetadata>> graphVariants;
// Configurations are built on-demand, but only once.
private final Map<String, ConfigurationMetadata> configurations = Maps.newHashMap();
protected AbstractLazyModuleComponentResolveMetadata(AbstractMutableModuleComponentResolveMetadata metadata) {
super(metadata);
configurationDefinitions = metadata.getConfigurationDefinitions();
variantMetadataRules = metadata.getVariantMetadataRules();
}
/**
* Creates a copy of the given metadata
*/
protected AbstractLazyModuleComponentResolveMetadata(AbstractLazyModuleComponentResolveMetadata metadata, ModuleSources sources, VariantDerivationStrategy variantDerivationStrategy) {
super(metadata, sources, variantDerivationStrategy);
this.configurationDefinitions = metadata.configurationDefinitions;
variantMetadataRules = metadata.variantMetadataRules;
}
/**
* Clear any cached state, for the case where the inputs are invalidated.
* This only happens when constructing a copy
*/
protected void copyCachedState(AbstractLazyModuleComponentResolveMetadata metadata, boolean copyGraphVariants) {
// Copy built-on-demand state
metadata.copyCachedConfigurations(this.configurations);
if (copyGraphVariants) {
this.graphVariants = metadata.graphVariants;
}
}
private synchronized void copyCachedConfigurations(Map<String, ConfigurationMetadata> target) {
target.putAll(configurations);
}
@Override
public VariantMetadataRules getVariantMetadataRules() {
return variantMetadataRules;
}
public ImmutableMap<String, Configuration> getConfigurationDefinitions() {
return configurationDefinitions;
}
private Optional<ImmutableList<? extends ConfigurationMetadata>> buildVariantsForGraphTraversal() {
ImmutableList<? extends ComponentVariant> variants = getVariants();
if (variants.isEmpty()) {
return addVariantsByRule(maybeDeriveVariants());
}
ImmutableList.Builder<ConfigurationMetadata> configurations = new ImmutableList.Builder<>();
for (ComponentVariant variant : variants) {
configurations.add(new LazyVariantBackedConfigurationMetadata(getId(), variant, getAttributes(), getAttributesFactory(), variantMetadataRules));
}
return addVariantsByRule(Optional.of(configurations.build()));
}
private Optional<ImmutableList<? extends ConfigurationMetadata>> addVariantsByRule(Optional<ImmutableList<? extends ConfigurationMetadata>> variants) {
if (variantMetadataRules.getAdditionalVariants().isEmpty()) {
return variants;
}
Map<String, ConfigurationMetadata> variantsByName = variants.or(ImmutableList.of()).stream().collect(Collectors.toMap(ConfigurationMetadata::getName, Function.identity()));
ImmutableList.Builder<ConfigurationMetadata> builder = new ImmutableList.Builder<>();
if (variants.isPresent()) {
builder.addAll(variants.get());
}
for (AdditionalVariant additionalVariant : variantMetadataRules.getAdditionalVariants()) {
String baseName = additionalVariant.getBase();
ConfigurationMetadata base = null;
if (baseName != null) {
if (variants.isPresent()) {
base = variantsByName.get(baseName);
if (!additionalVariant.isLenient() && !(base instanceof ModuleConfigurationMetadata)) {
throw new InvalidUserDataException("Variant '" + baseName + "' not defined in module " + getId().getDisplayName());
}
} else {
base = getConfiguration(baseName);
if (!additionalVariant.isLenient() && !(base instanceof ModuleConfigurationMetadata)) {
throw new InvalidUserDataException("Configuration '" + baseName + "' not defined in module " + getId().getDisplayName());
}
}
}
if (baseName == null || base instanceof ModuleConfigurationMetadata) {
ConfigurationMetadata configurationMetadata = new LazyRuleAwareWithBaseConfigurationMetadata(additionalVariant.getName(), (ModuleConfigurationMetadata) base, getId(), getAttributes(), variantMetadataRules, constructVariantExcludes(base));
builder.add(configurationMetadata);
}
}
return Optional.of(builder.build());
}
@Override
public synchronized Optional<ImmutableList<? extends ConfigurationMetadata>> getVariantsForGraphTraversal() {
if (graphVariants == null) {
graphVariants = buildVariantsForGraphTraversal();
}
return graphVariants;
}
@Override
public Set<String> getConfigurationNames() {
return configurationDefinitions.keySet();
}
@Override
public synchronized ConfigurationMetadata getConfiguration(final String name) {
ConfigurationMetadata populated = configurations.get(name);
if (populated != null) {
return populated;
}
ConfigurationMetadata md = populateConfigurationFromDescriptor(name, configurationDefinitions);
configurations.put(name, md);
return md;
}
protected ConfigurationMetadata populateConfigurationFromDescriptor(String name, Map<String, Configuration> configurationDefinitions) {
Configuration descriptorConfiguration = configurationDefinitions.get(name);
if (descriptorConfiguration == null) {
return null;
}
ImmutableSet<String> hierarchy = constructHierarchy(descriptorConfiguration);
boolean transitive = descriptorConfiguration.isTransitive();
boolean visible = descriptorConfiguration.isVisible();
return createConfiguration(getId(), name, transitive, visible, hierarchy, variantMetadataRules);
}
private ImmutableSet<String> constructHierarchy(Configuration descriptorConfiguration) {
if (descriptorConfiguration.getExtendsFrom().isEmpty()) {
return ImmutableSet.of(descriptorConfiguration.getName());
}
ImmutableSet.Builder<String> accumulator = new ImmutableSet.Builder<>();
populateHierarchy(descriptorConfiguration, accumulator);
return accumulator.build();
}
private void populateHierarchy(Configuration metadata, ImmutableSet.Builder<String> accumulator) {
accumulator.add(metadata.getName());
for (String parentName : metadata.getExtendsFrom()) {
Configuration parent = configurationDefinitions.get(parentName);
populateHierarchy(parent, accumulator);
}
}
private ImmutableList<ExcludeMetadata> constructVariantExcludes(ConfigurationMetadata base) {
if(base == null) {
return ImmutableList.of();
}
return base.getExcludes();
}
/**
* Creates a {@link org.gradle.internal.component.model.ConfigurationMetadata} implementation for this component.
*/
protected abstract DefaultConfigurationMetadata createConfiguration(ModuleComponentIdentifier componentId, String name, boolean transitive, boolean visible, ImmutableSet<String> hierarchy, VariantMetadataRules componentMetadataRules);
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
if (!super.equals(o)) {
return false;
}
AbstractLazyModuleComponentResolveMetadata that = (AbstractLazyModuleComponentResolveMetadata) o;
return Objects.equal(configurationDefinitions, that.configurationDefinitions);
}
@Override
public int hashCode() {
return Objects.hashCode(super.hashCode(),
configurationDefinitions);
}
}