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/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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.android.jack.errorhandling.annotationprocessor;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import javax.annotation.CheckForNull;
import javax.annotation.Nonnull;
import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.ProcessingEnvironment;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.annotation.processing.SupportedSourceVersion;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.TypeKind;
import javax.lang.model.type.TypeMirror;
import javax.tools.Diagnostic.Kind;
import javax.tools.FileObject;
import javax.tools.StandardLocation;
/**
* Annotation processor generating a dedicated resource file called {@code rscGeneratedFile}.
*/
@SupportedSourceVersion(SourceVersion.RELEASE_6)
@SupportedAnnotationTypes("*")
public class ResourceAnnotationProcessor extends AbstractProcessor {
@CheckForNull
private ProcessingEnvironment env;
@Nonnull
private final List<String> data = new ArrayList<String>();
@Nonnull
public final static String FILENAME = "rscGeneratedFile";
@Override
public synchronized void init(ProcessingEnvironment env) {
this.env = env;
try {
env.getFiler().getResource(StandardLocation.CLASS_OUTPUT, "", FILENAME);
} catch (IOException e) {
// Best effort
}
}
@Override
public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
if (roundEnv.processingOver()) {
try {
assert env != null;
FileObject resource = env.getFiler()
.createResource(StandardLocation.CLASS_OUTPUT, "", FILENAME);
OutputStream os = resource
.openOutputStream();
Writer writer = new OutputStreamWriter(os);
try {
for (String val : data) {
writer.write(val);
writer.write("\n");
}
} finally {
writer.close();
}
} catch (IOException e) {
env.getMessager().printMessage(Kind.ERROR,
"Can not write resource file for '" + FILENAME + "': " + e.getMessage());
}
} else {
//
// @ResourceAnnotationTest
//
for (Element element : getElementsAnnotatedWith(roundEnv, ResourceAnnotationTest.class)) {
assert data != null;
TypeMirror type = element.asType();
if (type.getKind() == TypeKind.DECLARED) {
data.add(ResourceAnnotationTest.class.getCanonicalName());
assert env != null;
data.add(env.getElementUtils().getBinaryName((TypeElement) element).toString());
}
}
}
return false;
}
@Nonnull
private Set<? extends Element> getElementsAnnotatedWith(@Nonnull RoundEnvironment roundEnv,
@Nonnull Class<? extends Annotation> cls) {
assert env != null;
String name = cls.getCanonicalName();
assert name != null;
TypeElement element = env.getElementUtils().getTypeElement(name);
assert element != null;
return roundEnv.getElementsAnnotatedWith(element);
}
}
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