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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.cpp;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.cmdline.Label;
import java.util.Map;
/** A source file that is an input to a c++ compilation. */
public abstract class CppSource {
private final Artifact source;
private final Label label;
private final Map<String, String> buildVariables;
/**
* Types of sources.
*/
public enum Type {
SOURCE,
HEADER,
CLIF_INPUT_PROTO,
}
public CppSource(Artifact source, Label label, Map<String, String> buildVariables) {
this.source = source;
this.label = label;
this.buildVariables = buildVariables;
}
/**
* Returns the actual source file.
*/
public Artifact getSource() {
return source;
}
/**
* Returns the label from which this source arises in the build graph.
*/
public Label getLabel() {
return label;
}
/**
* Returns build variables to be used specifically in the compilation of this source.
*/
public Map<String, String> getBuildVariables() {
return buildVariables;
}
/**
* Returns the type of this source.
*/
abstract Type getType();
private static class SourceCppSource extends CppSource {
protected SourceCppSource(Artifact source, Label label, Map<String, String> buildVariables) {
super(source, label, buildVariables);
}
@Override
public Type getType() {
return Type.SOURCE;
}
}
private static class HeaderCppSource extends CppSource {
protected HeaderCppSource(Artifact source, Label label, Map<String, String> buildVariables) {
super(source, label, buildVariables);
}
@Override
public Type getType() {
return Type.HEADER;
}
}
private static class ClifProtoCppSource extends CppSource {
protected ClifProtoCppSource(Artifact source, Label label, Map<String, String> buildVariables) {
super(source, label, buildVariables);
}
@Override
public Type getType() {
return Type.CLIF_INPUT_PROTO;
}
}
/**
* Creates a {@code CppSource}.
* @param source the actual source file
* @param label the label from which this source arises in the build graph
* @param buildVariables build variables that should be used specifically in the compilation
* of this source
* @param type type of the source file.
*/
static CppSource create(Artifact source, Label label, Map<String, String> buildVariables,
Type type) {
switch (type) {
case SOURCE:
return new SourceCppSource(source, label, buildVariables);
case HEADER:
return new HeaderCppSource(source, label, buildVariables);
case CLIF_INPUT_PROTO:
return new ClifProtoCppSource(source, label, buildVariables);
default:
throw new IllegalStateException("Unhandled CppSource type: " + type);
}
}
}
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