| // 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; |
| import javax.annotation.Nullable; |
| |
| /** |
| * 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 new Function<Artifact, Artifact>() { |
| @Override |
| @Nullable |
| public Artifact apply(@Nullable Artifact jar) { |
| Artifact result = collapsed.get(jar); |
| return result != null ? result : jar; // return null iff input == null |
| } |
| }; |
| } |
| } |