/*

 * Copyright (c) 2009 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.*;

import java.util.Set;

import java.util.HashSet;

import javax.annotation.processing.*;

import javax.lang.model.SourceVersion;

import javax.lang.model.element.*;

import javax.lang.model.util.ElementFilter;

import com.sun.source.util.JavacTask;

import com.sun.source.util.TaskEvent;

import com.sun.source.util.TaskListener;

import com.sun.source.util.TreePath;

import com.sun.tools.javac.main.JavaCompiler;

import com.sun.tools.javac.main.JavaCompiler.CompileState;

import com.sun.tools.javac.processing.JavacProcessingEnvironment;

import com.sun.tools.javac.util.Context;

/*

 * @test

 * @summary test that type processors are run when -proc:only is passed.

 * This class implements the functionality of a type processor, as previously

 * embodied by the AbstractTypeProcessor class.

 *

 * @author Mahmood Ali

 * @author Werner Dietl

 */

@SupportedAnnotationTypes("*")

public class TypeProcOnly extends AbstractProcessor {

    private static final String INDICATOR = "INDICATOR";

    private final AttributionTaskListener listener = new AttributionTaskListener();

    private final Set<Name> elements = new HashSet<Name>();

    @Override

    public final void init(ProcessingEnvironment env) {

        super.init(env);

        JavacTask.instance(env).addTaskListener(listener);

        Context ctx = ((JavacProcessingEnvironment)processingEnv).getContext();

        JavaCompiler compiler = JavaCompiler.instance(ctx);

        compiler.shouldStopPolicyIfNoError = CompileState.max(

                compiler.shouldStopPolicyIfNoError,

                CompileState.FLOW);

    }

    @Override

    public final boolean process(Set<? extends TypeElement> annotations,

            RoundEnvironment roundEnv) {

        for (TypeElement elem : ElementFilter.typesIn(roundEnv.getRootElements())) {

            elements.add(elem.getQualifiedName());

        }

        return false;

    }

    @Override

    public SourceVersion getSupportedSourceVersion() {

        return SourceVersion.latest();

    }

    private final class AttributionTaskListener implements TaskListener {

        @Override

        public void started(TaskEvent e) { }

        @Override

        public void finished(TaskEvent e) {

            if (e.getKind() != TaskEvent.Kind.ANALYZE)

                return;

            if (!elements.remove(e.getTypeElement().getQualifiedName()))

                return;

            System.out.println(INDICATOR);

        }

    }

    private static File writeTestFile() throws IOException {

        File f = new File("Test.java");

        PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));

        out.println("class Test { }");

        out.close();

        return f;

    }

    public static void main(String[] args) throws Exception {

        PrintStream prevOut = System.out;

        ByteArrayOutputStream bytes = new ByteArrayOutputStream();

        PrintStream out = new PrintStream(bytes);

        System.setOut(out);

        try {

            File f = writeTestFile();

            com.sun.tools.javac.Main.compile(new String[] {"-proc:only", "-processor", "TypeProcOnly", f.getAbsolutePath()});

        } finally {

            System.setOut(prevOut);

        }

        if (bytes.toString().trim().equals(INDICATOR)) {

            System.out.println("PASSED");

        } else {

            throw new Exception("Processor did not run correctly. Output: " + bytes);

        }

    }

}