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 7021650

  * @summary Fix Context issues

  * @library ../../lib

  * @build JavacTestingAbstractProcessor T7021650

  * @run main T7021650

  */

 import java.io.*;

 import java.net.*;

 import java.util.*;

 import javax.annotation.processing.*;

 import javax.lang.model.element.*;

 import javax.tools.*;

 import com.sun.tools.javac.comp.Attr;

 import com.sun.tools.javac.file.JavacFileManager;

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

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

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

 public class T7021650 extends JavacTestingAbstractProcessor {

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

         new T7021650().run();

     }

     static File testSrc = new File(System.getProperty("test.src"));

     static final int MAX_ROUNDS = 3;

     /**

      * Perform a compilation with custom factories registered in the context,

      * and verify that corresponding objects are created in each round.

      */

     void run() throws Exception {

         Counter demoCounter = new Counter();

         Counter myAttrCounter = new Counter();

         Context context = new Context();

         // Use a custom file manager which creates classloaders for annotation

         // processors with a sensible delegation parent, so that all instances

         // of test classes come from the same class loader. This is important

         // because the test performs class checks on the instances of classes

         // found in the context for each round or processing.

         context.put(JavaFileManager.class, new Context.Factory<JavaFileManager>() {

             public JavaFileManager make(Context c) {

                 return new JavacFileManager(c, true, null) {

                     @Override

                     protected ClassLoader getClassLoader(URL[] urls) {

                         return new URLClassLoader(urls, T7021650.class.getClassLoader());

                     }

                 };

             }

         });

         Demo.preRegister(context, demoCounter);

         MyAttr.preRegister(context, myAttrCounter);

         String[] args = {

             "-d", ".",

             "-processor", T7021650.class.getName(),

             "-XprintRounds",

             new File(testSrc, T7021650.class.getName() + ".java").getPath()

         };

         compile(context, args);

         // Expect to create Demo for initial round, then MAX_ROUNDS in which

         // GenX files are generated, then standard final round of processing.

         checkEqual("demoCounter", demoCounter.count, MAX_ROUNDS + 2);

         // Expect to create MyAttr for same processing rounds as for Demo,

         // plus additional context for final compilation.

         checkEqual("myAttrCounter", myAttrCounter.count, MAX_ROUNDS + 3);

     }

     void compile(Context context, String... args) throws Exception {

         StringWriter sw = new StringWriter();

         PrintWriter pw = new PrintWriter(sw);

         Main m = new Main("javac", pw);

         int rc = m.compile(args, context);

         pw.close();

         String out = sw.toString();

         if (!out.isEmpty())

             System.err.println(out);

         if (rc != 0)

             throw new Exception("compilation failed unexpectedly: rc=" + rc);

     }

     void checkEqual(String label, int found, int expect) throws Exception {

         if (found != expect)

             throw new Exception("unexpected value for " + label

                     + ": expected " + expect

                     + ": found " + found);

     }

     //---------------

     /*

      * A custom class unknown to javac but nonetheless registered in the context.

      */

     static class Demo {

         static void preRegister(Context context, final Counter counter) {

             context.put(Demo.class, new Context.Factory<Demo>() {

                 public Demo make(Context c) {

                     counter.count++;

                     return new Demo(c);

                 }

             });

         }

         Demo(Context c) {

             c.put(Demo.class, this);

         }

         static Demo instance(Context context) {

             return context.get(Demo.class);

         }

     }

     /**

      * A custom version of a standard javac component.

      */

     static class MyAttr extends Attr {

         static void preRegister(Context context, final Counter counter) {

             context.put(attrKey, new Context.Factory<Attr>() {

                 public Attr make(Context c) {

                     counter.count++;

                     return new MyAttr(c);

                 }

             });

         }

         MyAttr(Context c) {

             super(c);

         }

     }

     static class Counter {

         int count;

     }

     //---------------

     int round = 0;

     @Override

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

         round++;

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

         // verify items in context as expected

         check("Demo", Demo.instance(context), Demo.class);

         check("Attr", Attr.instance(context), MyAttr.class);

         // For a few rounds, generate new source files, so that we can check whether

         // values in the context are correctly handled in subsequent processing rounds

         if (round <= MAX_ROUNDS) {

             String pkg = "p";

             String currClass = "Gen" + round;

             String curr = pkg + "." + currClass;

             String next = (pkg + ".Gen" + (round + 1));

             StringBuilder text = new StringBuilder();

             text.append("package ").append(pkg).append(";\n");

             text.append("public class ").append(currClass).append(" {\n");

             if (round < MAX_ROUNDS)

                 text.append("    ").append(next).append(" x;\n");

             text.append("}\n");

             try {

                 JavaFileObject fo = filer.createSourceFile(curr);

                 Writer out = fo.openWriter();

                 try {

                     out.write(text.toString());

                 } finally {

                     out.close();

                 }

             } catch (IOException e) {

                 throw new Error(e);

             }

         }

         return true;

     }

     void check(String label, Object o, Class<?> clazz) {

         if (o == null)

             throw new IllegalStateException(label + ": no item found");

         if (!clazz.isAssignableFrom(o.getClass()))

             throw new IllegalStateException(label + ": unexpected class: " + o.getClass());

     }

 }