1 /*
   2  * Copyright (c) 2006, 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     6423972
  27  * @summary Tests TypeParameter.getBounds.
  28  * @author  Scott Seligman
  29  * @build   TypeParamBounds
  30  * @compile -processor TypeParamBounds -proc:only TypeParamBounds.java
  31  */
  32 
  33 import java.util.HashMap;
  34 import java.util.List;
  35 import java.util.Map;
  36 import java.util.Set;
  37 import javax.annotation.processing.*;
  38 import javax.lang.model.SourceVersion;
  39 import javax.lang.model.element.*;
  40 import javax.lang.model.type.*;
  41 import javax.lang.model.util.*;
  42 
  43 @SupportedAnnotationTypes("*")
  44 public class TypeParamBounds extends AbstractProcessor {
  45 
  46     Elements elements;
  47     Types types;
  48 
  49     public void init(ProcessingEnvironment penv) {
  50         super.init(penv);
  51         elements = penv.getElementUtils();
  52         types = penv.getTypeUtils();
  53     }
  54 
  55     public boolean process(Set<? extends TypeElement> annoTypes,
  56                            RoundEnvironment round) {
  57         if (!round.processingOver())
  58             doit(annoTypes, round);
  59         return true;
  60     }
  61 
  62     @Override
  63     public SourceVersion getSupportedSourceVersion() {
  64         return SourceVersion.latest();
  65     }
  66 
  67     private void doit(Set<? extends TypeElement> annoTypes,
  68                       RoundEnvironment round) {
  69         TypeElement gen = elements.getTypeElement("TypeParamBounds.Gen");
  70 
  71         // For each type parameter of Gen, compare its bounds with the
  72         // bounds that are expected.
  73         //
  74         for (TypeParameterElement tparam : gen.getTypeParameters()) {
  75             System.out.println(tparam);
  76             List<? extends TypeMirror> bounds = tparam.getBounds();
  77             String[] expected = Gen.boundNames.get(tparam + "");
  78 
  79             if (bounds.size() != expected.length)
  80                 throw new AssertionError();
  81             int i = 0;
  82             for (TypeMirror bound : bounds) {
  83                 Name got = types.asElement(bound).getSimpleName();
  84                 String shoulda = expected[i++];
  85                 System.out.println("  " + got);
  86                 if (!got.contentEquals(shoulda))
  87                     throw new AssertionError(shoulda);
  88             }
  89         }
  90     }
  91 
  92 
  93     // Fodder for the processor
  94 
  95     static class Gen<T, U extends Object, V extends Number, W extends U,
  96                      X extends Runnable, Y extends CharSequence & Runnable,
  97                      Z extends Object & Runnable> {
  98 
  99         // The names of the bounds of each type parameter of Gen.
 100         static Map<String, String[]> boundNames =
 101                 new HashMap<String, String[]>();
 102 
 103         static {
 104             boundNames.put("T", new String[] {"Object"});
 105             boundNames.put("U", new String[] {"Object"});
 106             boundNames.put("V", new String[] {"Number"});
 107             boundNames.put("W", new String[] {"U"});
 108             boundNames.put("X", new String[] {"Runnable"});
 109             boundNames.put("Y", new String[] {"CharSequence", "Runnable"});
 110             boundNames.put("Z", new String[] {"Object", "Runnable"});
 111         }
 112     }
 113 }