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/*
* Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import com.sun.source.tree.AnnotationTree;
import com.sun.source.tree.CompilationUnitTree;
import com.sun.source.util.JavacTask;
import com.sun.source.util.TreeScanner;
import com.sun.source.util.Trees;
import com.sun.tools.javac.api.JavacTool;
import com.sun.tools.javac.file.JavacFileManager;
import com.sun.tools.javac.util.Assert;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Set;
import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic;
import javax.tools.DiagnosticListener;
import javax.tools.FileObject;
import javax.tools.ForwardingJavaFileManager;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileObject;
import javax.tools.SimpleJavaFileObject;
@SupportedAnnotationTypes("*")
public class Processor extends AbstractProcessor {
@Override
public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
throw new IllegalStateException("Should not be invoked.");
}
public static void main(String... args) throws IOException, URISyntaxException {
if (args.length != 1) throw new IllegalStateException("Must provide class name!");
String testContent = null;
List<File> sourcePath = new ArrayList<>();
for (String sourcePaths : System.getProperty("test.src.path").split(":")) {
sourcePath.add(new File(sourcePaths));
}
JavacFileManager fm = JavacTool.create().getStandardFileManager(null, null, null);
for (File sp : sourcePath) {
File inp = new File(sp, args[0]);
if (inp.canRead()) {
testContent = fm.getJavaFileObject(inp.toPath()).getCharContent(true).toString();
}
}
if (testContent == null) throw new IllegalStateException();
DiagnosticListener<JavaFileObject> devNull = new DiagnosticListener<JavaFileObject>() {
@Override public void report(Diagnostic<? extends JavaFileObject> diagnostic) { }
};
JavaFileObject testFile = new TestFO(new URI("mem://" + args[0]), testContent);
JavacTask task = JavacTool.create().getTask(null,
new TestFM(fm),
devNull,
Arrays.asList("-Xjcov"),
null,
Arrays.asList(testFile));
final Trees trees = Trees.instance(task);
final CompilationUnitTree cut = task.parse().iterator().next();
task.analyze();
final List<int[]> annotations = new ArrayList<>();
new TreeScanner<Void, Void>() {
@Override
public Void visitAnnotation(AnnotationTree node, Void p) {
int endPos = (int) trees.getSourcePositions().getEndPosition(cut, node);
Assert.check(endPos >= 0);
annotations.add(new int[] {(int) trees.getSourcePositions().getStartPosition(cut, node), endPos});
return super.visitAnnotation(node, p);
}
}.scan(cut.getTypeDecls().get(0), null);
Collections.sort(annotations, new Comparator<int[]>() {
@Override public int compare(int[] o1, int[] o2) {
return o2[0] - o1[0];
}
});
for (final int[] annotation : annotations) {
StringBuilder updatedContent = new StringBuilder();
int last = testContent.length();
for (int[] toRemove : annotations) {
if (toRemove == annotation) continue;
updatedContent.insert(0, testContent.substring(toRemove[1], last));
last = toRemove[0];
}
updatedContent.insert(0, testContent.substring(0, last));
JavaFileObject updatedFile = new TestFO(new URI("mem://" + args[0]), updatedContent.toString());
JavacTask testTask = JavacTool.create().getTask(null,
new TestFM(fm),
devNull,
Arrays.asList("-processor", "Processor"),
null,
Arrays.asList(updatedFile));
try {
testTask.analyze();
} catch (Throwable e) {
System.out.println("error while processing:");
System.out.println(updatedContent);
throw e;
}
}
}
private static final class TestFO extends SimpleJavaFileObject {
private final String content;
public TestFO(URI uri, String content) {
super(uri, Kind.SOURCE);
this.content = content;
}
@Override public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
return content;
}
@Override public boolean isNameCompatible(String simpleName, Kind kind) {
return true;
}
}
private static final class TestFM extends ForwardingJavaFileManager<JavaFileManager> {
public TestFM(JavaFileManager fileManager) {
super(fileManager);
}
@Override
public boolean isSameFile(FileObject a, FileObject b) {
return a.equals(b);
}
}
}
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