| /* |
| * Copyright (c) 2013, 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 java.io.File; |
| import java.io.IOException; |
| import java.io.Writer; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.util.Arrays; |
| import java.util.Comparator; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.Set; |
| import java.util.TreeMap; |
| import javax.annotation.processing.AbstractProcessor; |
| import javax.annotation.processing.RoundEnvironment; |
| import javax.annotation.processing.SupportedAnnotationTypes; |
| import javax.annotation.processing.SupportedOptions; |
| import javax.lang.model.element.TypeElement; |
| import javax.tools.Diagnostic; |
| import javax.tools.DiagnosticCollector; |
| import javax.tools.DiagnosticListener; |
| import javax.tools.FileObject; |
| import javax.tools.ForwardingJavaFileManager; |
| import javax.tools.JavaFileManager; |
| import javax.tools.JavaFileObject; |
| import javax.tools.JavaFileObject.Kind; |
| import javax.tools.SimpleJavaFileObject; |
| import com.sun.source.tree.AnnotationTree; |
| import com.sun.source.tree.CompilationUnitTree; |
| import com.sun.source.tree.LiteralTree; |
| 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; |
| |
| @SupportedAnnotationTypes("*") |
| @SupportedOptions("target") |
| public class Processor extends AbstractProcessor { |
| |
| private int round = 0; |
| @Override |
| public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) { |
| if (round++ == 0) { |
| try (Writer out = processingEnv.getFiler() |
| .createSourceFile("Anno.java") |
| .openWriter()) { |
| String target = processingEnv.getOptions().get("target"); |
| String code = "import java.lang.annotation.ElementType;\n" + |
| "import java.lang.annotation.Target;\n" + |
| "@Target(ElementType." + target + ")\n" + |
| "@interface Anno { public String value(); }\n"; |
| out.write(code); |
| } catch (IOException exc) { |
| throw new IllegalStateException(exc); |
| } |
| } |
| return true; |
| } |
| |
| public static void main(String... args) throws IOException, URISyntaxException { |
| if (args.length != 1) throw new IllegalStateException("Must provide class name!"); |
| String testContent = null; |
| File testSrc = new File(System.getProperty("test.src")); |
| File testFile = new File(testSrc, args[0]); |
| if (!testFile.canRead()) throw new IllegalStateException("Cannot read the test source"); |
| JavacTool compiler = JavacTool.create(); |
| JavacFileManager fm = compiler.getStandardFileManager(null, null, null); |
| testContent = fm.getRegularFile(testFile).getCharContent(true).toString(); |
| JavaFileObject testFileObject = new TestFO(new URI("mem://" + args[0]), testContent); |
| TestFM testFileManager = new TestFM(fm); |
| JavacTask task = compiler.getTask(null, |
| testFileManager, |
| new DiagnosticCollector<JavaFileObject>(), |
| null, |
| null, |
| Arrays.asList(testFileObject)); |
| final Trees trees = Trees.instance(task); |
| final CompilationUnitTree cut = task.parse().iterator().next(); |
| |
| final Map<int[], String> annotation2Target = new TreeMap<>(new Comparator<int[]>() { |
| @Override public int compare(int[] o1, int[] o2) { |
| return o2[0] - o1[0]; |
| } |
| }); |
| |
| new TreeScanner<Void, Void>() { |
| @Override |
| public Void visitAnnotation(AnnotationTree node, Void p) { |
| int endPos = (int) trees.getSourcePositions().getEndPosition(cut, node); |
| |
| Assert.check(endPos >= 0); |
| |
| int startPos = (int) trees.getSourcePositions().getStartPosition(cut, node); |
| String target = ((LiteralTree) node.getArguments().get(0)).getValue().toString(); |
| |
| annotation2Target.put(new int[] {startPos, endPos}, target); |
| |
| return super.visitAnnotation(node, p); |
| } |
| }.scan(cut.getTypeDecls().get(0), null); |
| |
| DiagnosticListener<JavaFileObject> noErrors = new DiagnosticListener<JavaFileObject>() { |
| @Override public void report(Diagnostic<? extends JavaFileObject> diagnostic) { |
| if (diagnostic.getKind() == Diagnostic.Kind.ERROR) { |
| throw new IllegalStateException(diagnostic.toString()); |
| } |
| } |
| }; |
| |
| for (Entry<int[], String> e : annotation2Target.entrySet()) { |
| StringBuilder updatedContent = new StringBuilder(); |
| int last = testContent.length(); |
| |
| for (int[] toRemove : annotation2Target.keySet()) { |
| if (toRemove == e.getKey()) 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 = compiler.getTask(null, |
| testFileManager, |
| noErrors, |
| Arrays.asList("-processor", "Processor", |
| "-Atarget=" + e.getValue()), |
| null, |
| Arrays.asList(updatedFile)); |
| |
| try { |
| testTask.analyze(); |
| } catch (Throwable exc) { |
| System.out.println("error while processing:"); |
| System.out.println(updatedContent); |
| throw exc; |
| } |
| |
| JavacTask testTask2 = compiler.getTask(null, |
| testFileManager, |
| new DiagnosticCollector<JavaFileObject>(), |
| null, |
| null, |
| Arrays.asList(updatedFile)); |
| |
| try { |
| testTask2.analyze(); |
| } catch (Throwable exc) { |
| System.out.println("error while processing:"); |
| System.out.println(updatedContent); |
| throw exc; |
| } |
| } |
| } |
| |
| 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); |
| } |
| |
| } |
| } |