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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.build.lib.rules.android;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.packages.RuleClass.ConfiguredTargetFactory.RuleErrorException;
import com.google.devtools.build.lib.packages.RuleErrorConsumer;
import java.util.List;
import java.util.Optional;
import java.util.function.Consumer;
import java.util.stream.Collectors;
/** Filters containers of android resources. */
public class ResourceFilter {
private final ImmutableSet<Artifact> acceptedResources;
private final Consumer<Artifact> filteredDependencyConsumer;
private final boolean isEmpty;
static final ResourceFilter empty() {
return new ResourceFilter(ImmutableSet.of(), (artifact -> {}), /* isEmpty= */ true);
}
static final ResourceFilter of(
ImmutableSet<Artifact> acceptedResources, Consumer<Artifact> filteredDependencyConsumer) {
return new ResourceFilter(acceptedResources, filteredDependencyConsumer, /* isEmpty= */ false);
}
private ResourceFilter(
ImmutableSet<Artifact> acceptedResources,
Consumer<Artifact> filteredDependencyConsumer,
boolean isEmpty) {
this.acceptedResources = acceptedResources;
this.filteredDependencyConsumer = filteredDependencyConsumer;
this.isEmpty = isEmpty;
}
public Optional<NestedSet<Artifact>> maybeFilterDependencies(NestedSet<Artifact> artifacts) {
if (isEmpty) {
return Optional.empty();
}
List<Artifact> asList = artifacts.toList();
List<Artifact> filtered =
asList.stream().filter(acceptedResources::contains).collect(Collectors.toList());
if (filtered.size() == asList.size()) {
// No filtering needs to be done
return Optional.empty();
}
return Optional.of(NestedSetBuilder.wrap(artifacts.getOrder(), filtered));
}
public NestedSet<ValidatedAndroidResources> filterDependencyContainers(
RuleErrorConsumer errorConsumer, NestedSet<ValidatedAndroidResources> resourceContainers)
throws RuleErrorException {
if (isEmpty) {
return resourceContainers;
}
NestedSetBuilder<ValidatedAndroidResources> builder =
new NestedSetBuilder<>(resourceContainers.getOrder());
for (ValidatedAndroidResources container : resourceContainers) {
builder.add(container.filter(errorConsumer, this, /* isDependency = */ true));
}
return builder.build();
}
Optional<ImmutableList<Artifact>> maybeFilter(
ImmutableList<Artifact> artifacts, boolean isDependency) {
if (isEmpty) {
return Optional.empty();
}
boolean removedAny = false;
ImmutableList.Builder<Artifact> filtered = ImmutableList.builder();
for (Artifact artifact : artifacts) {
if (acceptedResources.contains(artifact)) {
filtered.add(artifact);
} else {
removedAny = true;
if (isDependency) {
filteredDependencyConsumer.accept(artifact);
}
}
}
if (!removedAny) {
// No filtering was done, return the original
return Optional.empty();
}
return Optional.of(filtered.build());
}
}
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