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// Copyright 2015 Google Inc. 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.buildjar.javac.plugins.processing;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.buildjar.javac.plugins.BlazeJavaCompilerPlugin;
import java.nio.file.Path;
import java.util.HashSet;
/**
* A module for information about the compilation's annotation processing.
*/
public class AnnotationProcessingModule {
/**
* A builder for {@link AnnotationProcessingModule}s.
*/
public static class Builder {
private Path sourceGenDir;
private Path classDir;
private Builder() {}
public AnnotationProcessingModule build() {
return new AnnotationProcessingModule(sourceGenDir, classDir);
}
public void setSourceGenDir(Path sourceGenDir) {
this.sourceGenDir = sourceGenDir.toAbsolutePath();
}
public void setClassDir(Path classDir) {
this.classDir = classDir.toAbsolutePath();
}
}
private final boolean enabled;
private final Path sourceGenDir;
private final Path classDir;
public Path sourceGenDir() {
return sourceGenDir;
}
private AnnotationProcessingModule(Path sourceGenDir, Path classDir) {
this.sourceGenDir = sourceGenDir;
this.classDir = classDir;
this.enabled = sourceGenDir != null && classDir != null;
}
public static Builder builder() {
return new Builder();
}
public void registerPlugin(ImmutableList.Builder<BlazeJavaCompilerPlugin> builder) {
if (enabled) {
builder.add(new AnnotationProcessingPlugin(this));
}
}
/**
* The set of prefixes of generated class files.
*/
private final HashSet<String> pathPrefixes = new HashSet<>();
/**
* Record the prefix of a group of generated class files.
*
* <p>Prefixes are used to handle generated inner classes. Since
* e.g. j/c/g/Foo.class and j/c/g/Foo$Inner.class both correspond to the
* same generated source file, only the prefix "j/c/g/Foo" is recorded.
*/
void recordPrefix(String pathPrefix) {
pathPrefixes.add(pathPrefix);
}
/** Returns true if the given path is to a generated source file. */
public boolean isGeneratedSource(Path sourcePath) {
return sourcePath.toAbsolutePath().startsWith(sourceGenDir);
}
/** Returns true if the given path is to a generated class file. */
public boolean isGeneratedClass(Path path) {
if (!path.getFileName().toString().endsWith(".class")) {
return false;
}
String prefix = classDir.relativize(path.toAbsolutePath()).toString();
prefix = prefix.substring(0, prefix.length() - ".class".length());
int idx = prefix.lastIndexOf('$');
if (idx > 0) {
prefix = prefix.substring(0, idx);
}
return pathPrefixes.contains(prefix);
}
}
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