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// Copyright 2014 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.cpp;
import com.google.common.base.Optional;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec.VisibleForSerialization;
/** Structure for C++ module maps. Stores the name of the module and a .cppmap artifact. */
@Immutable
@AutoCodec
public final class CppModuleMap {
// NOTE: If you add a field here, you'll likely need to update CppModuleMapAction.computeKey().
private final Artifact artifact;
private final String name;
private final Optional<Artifact> umbrellaHeader;
public CppModuleMap(Artifact artifact, String name) {
this(artifact, Optional.absent(), name);
}
public CppModuleMap(Artifact artifact, Artifact umbrellaHeader, String name) {
this(artifact, Optional.fromNullable(umbrellaHeader), name);
}
@AutoCodec.Instantiator
@VisibleForSerialization
CppModuleMap(Artifact artifact, Optional<Artifact> umbrellaHeader, String name) {
this.artifact = artifact;
this.umbrellaHeader = umbrellaHeader;
this.name = name;
}
public Artifact getArtifact() {
return artifact;
}
public String getName() {
return name;
}
/**
* Returns an optional umbrella header artifact. The headers declared in module maps are compiled
* using the #import directives which are incompatible with J2ObjC segmented headers. The headers
* generated by J2ObjC need to be compiled using the #include directives. We can #include all the
* headers in an umbrella header and then delcare the umbrella header in the module map.
*/
public Optional<Artifact> getUmbrellaHeader() {
return umbrellaHeader;
}
@Override
public String toString() {
return name + "@" + artifact;
}
/**
* Specifies whether to generate an umbrella header.
*/
public enum UmbrellaHeaderStrategy {
/** Generate an umbrella header. */
GENERATE,
/** Do not generate an umbrella header. */
DO_NOT_GENERATE
}
}
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