1 /*

     2  * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /**

    25  * @test

    26  * @bug 7021650

    27  * @summary Fix Context issues

    28  * @library /tools/javac/lib

    29  * @modules jdk.compiler/com.sun.tools.javac.comp

    30  *          jdk.compiler/com.sun.tools.javac.file

    31  *          jdk.compiler/com.sun.tools.javac.main

    32  *          jdk.compiler/com.sun.tools.javac.processing

    33  *          jdk.compiler/com.sun.tools.javac.util

    34  * @build JavacTestingAbstractProcessor T7021650

    35  * @run main T7021650

    36  */

    37 

    38 import java.io.*;

    39 import java.net.*;

    40 import java.util.*;

    41 import javax.annotation.processing.*;

    42 import javax.lang.model.element.*;

    43 import javax.tools.*;

    44 

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

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

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

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

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

    50 

    51 public class T7021650 extends JavacTestingAbstractProcessor {

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

    53         new T7021650().run();

    54     }

    55 

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

    57     static final int MAX_ROUNDS = 3;

    58 

    59     /**

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

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

    62      */

    63     void run() throws Exception {

    64         Counter myDemoCounter = new Counter();

    65         Counter myAttrCounter = new Counter();

    66 

    67         Context context = new Context();

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

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

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

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

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

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

    74             public JavaFileManager make(Context c) {

    75                 return new JavacFileManager(c, true, null) {

    76                     @Override

    77                     protected ClassLoader getClassLoader(URL[] urls) {

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

    79                     }

    80                 };

    81             }

    82         });

    83 

    84         MyDemo.preRegister(context, myDemoCounter);

    85         MyAttr.preRegister(context, myAttrCounter);

    86 

    87         String[] args = {

    88             "-d", ".",

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

    90             "-XprintRounds",

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

    92         };

    93 

    94         compile(context, args);

    95 

    96         // the services should only be created once in the current scheme:

    97         checkEqual("demoCounter", myDemoCounter.count, 1);

    98         checkEqual("myAttrCounter", myAttrCounter.count, 1);

    99     }

   100 

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

   102         StringWriter sw = new StringWriter();

   103         PrintWriter pw = new PrintWriter(sw);

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

   105         Main.Result res = m.compile(args, context);

   106         pw.close();

   107         String out = sw.toString();

   108         if (!out.isEmpty())

   109             System.err.println(out);

   110         if (!res.isOK())

   111             throw new Exception("compilation failed unexpectedly: result=" + res);

   112     }

   113 

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

   115         if (found != expect)

   116             throw new Exception("unexpected value for " + label

   117                     + ": expected " + expect

   118                     + ": found " + found);

   119     }

   120 

   121     //---------------

   122 

   123     /*

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

   125      */

   126     static class Demo {

   127         Demo(Context c) {

   128             c.put(Demo.class, this);

   129         }

   130 

   131         static Demo instance(Context context) {

   132             return context.get(Demo.class);

   133         }

   134     }

   135 

   136     static class MyDemo extends Demo {

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

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

   139                 public Demo make(Context c) {

   140                     counter.count++;

   141                     return new MyDemo(c);

   142                 }

   143             });

   144         }

   145 

   146         MyDemo(Context c) {

   147             super(c);

   148         }

   149     }

   150 

   151     /**

   152      * A custom version of a standard javac component.

   153      */

   154     static class MyAttr extends Attr {

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

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

   157                 public Attr make(Context c) {

   158                     counter.count++;

   159                     return new MyAttr(c);

   160                 }

   161             });

   162         }

   163 

   164         MyAttr(Context c) {

   165             super(c);

   166         }

   167     }

   168 

   169     static class Counter {

   170         int count;

   171     }

   172 

   173     //---------------

   174 

   175     int round = 0;

   176 

   177     @Override

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

   179         round++;

   180 

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

   182 

   183         // verify items in context as expected

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

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

   186 

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

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

   189         if (round <= MAX_ROUNDS) {

   190             String pkg = "p";

   191             String currClass = "Gen" + round;

   192             String curr = pkg + "." + currClass;

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

   194             StringBuilder text = new StringBuilder();

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

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

   197             if (round < MAX_ROUNDS)

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

   199             text.append("}\n");

   200 

   201             try {

   202                 JavaFileObject fo = filer.createSourceFile(curr);

   203                 Writer out = fo.openWriter();

   204                 try {

   205                     out.write(text.toString());

   206                 } finally {

   207                     out.close();

   208                 }

   209             } catch (IOException e) {

   210                 throw new Error(e);

   211             }

   212         }

   213 

   214         return true;

   215     }

   216 

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

   218         if (o == null)

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

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

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

   222     }

   223 }