Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 2011, 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.

  */

 /*

  * @test

  * @bug 7092965

  * @summary javac should not close processorClassLoader before end of compilation

  */

 import com.sun.source.util.JavacTask;

 import com.sun.source.util.TaskEvent;

 import com.sun.source.util.TaskListener;

 import com.sun.tools.javac.api.ClientCodeWrapper.Trusted;

 import com.sun.tools.javac.api.JavacTool;

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

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

 import java.io.ByteArrayOutputStream;

 import java.io.File;

 import java.io.IOException;

 import java.io.PrintStream;

 import java.lang.reflect.Field;

 import java.net.URI;

 import java.util.ArrayList;

 import java.util.Arrays;

 import java.util.Collections;

 import java.util.List;

 import javax.annotation.processing.ProcessingEnvironment;

 import javax.tools.JavaFileObject;

 import javax.tools.SimpleJavaFileObject;

 import javax.tools.StandardJavaFileManager;

 import javax.tools.StandardLocation;

 import javax.tools.ToolProvider;

 /*

  * The test compiles an annotation processor and a helper class into a

  * custom classes directory.

  *

  * It then uses them while compiling a dummy file, with the custom classes

  * directory on the processor path, thus guaranteeing that references to

  * these class are satisfied by the processor class loader.

  *

  * The annotation processor uses the javac TaskListener to run code

  * after annotation processing has completed, to verify that the classloader

  * is not closed until the end of the compilation.

  */

 @Trusted // avoids use of ClientCodeWrapper

 public class TestClose implements TaskListener {

     public static final String annoProc =

         "import java.util.*;\n" +

         "import javax.annotation.processing.*;\n" +

         "import javax.lang.model.*;\n" +

         "import javax.lang.model.element.*;\n" +

         "import com.sun.source.util.*;\n" +

         "import com.sun.tools.javac.processing.*;\n" +

         "import com.sun.tools.javac.util.*;\n" +

         "@SupportedAnnotationTypes(\"*\")\n" +

         "public class AnnoProc extends AbstractProcessor {\n" +

         "    @Override\n" +

         "    public SourceVersion getSupportedSourceVersion() {\n" +

         "        return SourceVersion.latest();\n" +

         "    }\n" +

         "    @Override\n" +

         "    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {\n" +

         "        System.out.println(\"in AnnoProc.process\");\n" +

         "        final ClassLoader cl = getClass().getClassLoader();\n" +

         "        if (roundEnv.processingOver()) {\n" +

         "            TestClose.add(processingEnv, new Runnable() {\n" +

         "                public void run() {\n" +

         "                    System.out.println(getClass().getName() + \": run()\");\n" +

         "                    try {\n" +

         "                    cl.loadClass(\"Callback\")\n" +

         "                        .asSubclass(Runnable.class)\n" +

         "                        .newInstance()\n" +

         "                        .run();\n" +

         "                    } catch (ReflectiveOperationException e) {\n" +

         "                        throw new Error(e);\n" +

         "                    }\n" +

         "                }\n" +

         "            });\n" +

         "        }\n" +

         "        return true;\n" +

         "    }\n" +

         "}\n";

     public static final String callback =

         "public class Callback implements Runnable {\n" +

         "    public void run() {\n" +

         "        System.out.println(getClass().getName() + \": run()\");\n" +

         "    }\n" +

         "}";

     public static void main(String... args) throws Exception {

         new TestClose().run();

     }

     void run() throws IOException {

         JavacTool tool = (JavacTool) ToolProvider.getSystemJavaCompiler();

         StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null);

         File classes = new File("classes");

         classes.mkdirs();

         File extraClasses = new File("extraClasses");

         extraClasses.mkdirs();

         System.out.println("compiling classes to extraClasses");

         {   // setup class in extraClasses

             fm.setLocation(StandardLocation.CLASS_OUTPUT,

                     Collections.singleton(extraClasses));

             List<? extends JavaFileObject> files = Arrays.asList(

                     new MemFile("AnnoProc.java", annoProc),

                     new MemFile("Callback.java", callback));

             JavacTask task = tool.getTask(null, fm, null, null, null, files);

             check(task.call());

         }

         System.out.println("compiling dummy to classes with anno processor");

         {   // use that class in a TaskListener after processing has completed

             PrintStream prev = System.out;

             String out;

             ByteArrayOutputStream baos = new ByteArrayOutputStream();

             try (PrintStream ps = new PrintStream(baos)) {

                 System.setOut(ps);

                 File testClasses = new File(System.getProperty("test.classes"));

                 fm.setLocation(StandardLocation.CLASS_OUTPUT,

                         Collections.singleton(classes));

                 fm.setLocation(StandardLocation.ANNOTATION_PROCESSOR_PATH,

                         Arrays.asList(extraClasses, testClasses));

                 List<? extends JavaFileObject> files = Arrays.asList(

                         new MemFile("my://dummy", "class Dummy { }"));

                 List<String> options = Arrays.asList("-processor", "AnnoProc");

                 JavacTask task = tool.getTask(null, fm, null, options, null, files);

                 task.setTaskListener(this);

                 check(task.call());

             } finally {

                 System.setOut(prev);

                 out = baos.toString();

                 if (!out.isEmpty())

                     System.out.println(out);

             }

             check(out.contains("AnnoProc$1: run()"));

             check(out.contains("Callback: run()"));

         }

     }

     @Override

     public void started(TaskEvent e) {

         System.out.println("Started: " + e);

     }

     @Override

     public void finished(TaskEvent e) {

         System.out.println("Finished: " + e);

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

             for (Runnable r: runnables) {

                 System.out.println("running " + r);

                 r.run();

             }

         }

     }

     void check(boolean b) {

         if (!b)

             throw new AssertionError();

     }

     public static void add(ProcessingEnvironment env, Runnable r) {

         try {

             Context c = ((JavacProcessingEnvironment) env).getContext();

             Object o = c.get(TaskListener.class);

             // The TaskListener is an instanceof TestClose, but when using the

             // default class loaders. the taskListener uses a different

             // instance of Class<TestClose> than the anno processor.

             // If you try to evaluate

             //      TestClose tc = (TestClose) (o).

             // you get the following somewhat confusing error:

             //   java.lang.ClassCastException: TestClose cannot be cast to TestClose

             // The workaround is to access the fields of TestClose with reflection.

             Field f = o.getClass().getField("runnables");

             @SuppressWarnings("unchecked")

             List<Runnable> runnables = (List<Runnable>) f.get(o);

             runnables.add(r);

         } catch (Throwable t) {

             System.err.println(t);

         }

     }

     public List<Runnable> runnables = new ArrayList<>();

     class MemFile extends SimpleJavaFileObject {

         public final String text;

         MemFile(String name, String text) {

             super(URI.create(name), JavaFileObject.Kind.SOURCE);

             this.text = text;

         }

         @Override

         public String getName() {

             return uri.toString();

         }

         @Override

         public String getCharContent(boolean ignoreEncodingErrors) {

             return text;

         }

     }

 }