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// Copyright 2016 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 static com.google.common.base.Preconditions.checkNotNull;
import static com.google.devtools.build.lib.collect.nestedset.Order.STABLE_ORDER;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import java.util.HashMap;
/**
* Provider of Jar files transitively to be included into the runtime classpath of an Android app.
*/
@Immutable
public class AndroidRuntimeJarProvider implements TransitiveInfoProvider {
/** Provider that doesn't provide any runtime Jars, typically used for neverlink targets. */
public static final AndroidRuntimeJarProvider NEVERLINK =
new AndroidRuntimeJarProvider(
NestedSetBuilder.<ImmutableMap<Artifact, Artifact>>emptySet(STABLE_ORDER));
/** Builder for {@link AndroidRuntimeJarProvider}. */
public static class Builder {
private final ImmutableMap.Builder<Artifact, Artifact> newlyDesugared = ImmutableMap.builder();
private final NestedSetBuilder<ImmutableMap<Artifact, Artifact>> transitiveMappings =
NestedSetBuilder.stableOrder();
public Builder() {}
/**
* Copies all mappings from the given providers, which is useful to aggregate providers from
* dependencies.
*/
public Builder addTransitiveProviders(Iterable<AndroidRuntimeJarProvider> providers) {
for (AndroidRuntimeJarProvider provider : providers) {
transitiveMappings.addTransitive(provider.runtimeJars);
}
return this;
}
/** Adds a mapping from a Jar to its desugared version. */
public Builder addDesugaredJar(Artifact jar, Artifact desugared) {
newlyDesugared.put(checkNotNull(jar, "jar"), checkNotNull(desugared, "desugared"));
return this;
}
/** Returns the finished {@link AndroidRuntimeJarProvider}. */
public AndroidRuntimeJarProvider build() {
return new AndroidRuntimeJarProvider(transitiveMappings.add(newlyDesugared.build()).build());
}
}
/** Mappings from Jar artifacts to the corresponding dex archives. */
private final NestedSet<ImmutableMap<Artifact, Artifact>> runtimeJars;
private AndroidRuntimeJarProvider(NestedSet<ImmutableMap<Artifact, Artifact>> runtimeJars) {
this.runtimeJars = runtimeJars;
}
/**
* Returns function that maps Jars to desugaring results if available and returns the given Jar
* otherwise.
*/
public Function<Artifact, Artifact> collapseToFunction() {
final HashMap<Artifact, Artifact> collapsed = new HashMap<>();
for (ImmutableMap<Artifact, Artifact> partialMapping : runtimeJars) {
collapsed.putAll(partialMapping);
}
return jar -> {
Artifact result = collapsed.get(jar);
return result != null ? result : jar; // return null iff input == null
};
}
}
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