1 /*
   2  * Copyright (c) 2009 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 import java.util.HashSet;
  24 import java.util.Set;
  25 
  26 import javax.annotation.processing.*;
  27 import javax.lang.model.SourceVersion;
  28 import javax.lang.model.element.*;
  29 import javax.lang.model.util.ElementFilter;
  30 
  31 import com.sun.source.util.JavacTask;
  32 import com.sun.source.util.TaskEvent;
  33 import com.sun.source.util.TaskListener;
  34 import com.sun.source.util.TreePath;
  35 import com.sun.tools.javac.main.JavaCompiler;
  36 import com.sun.tools.javac.main.JavaCompiler.CompileState;
  37 import com.sun.tools.javac.processing.JavacProcessingEnvironment;
  38 import com.sun.tools.javac.util.Context;
  39 
  40 /*
  41  * @test
  42  * @summary test that package annotations are available to type processors.
  43  * This class implements the functionality of a type processor, as previously
  44  * embodied by the AbstractTypeProcessor class.
  45  *
  46  * @author Mahmood Ali
  47  * @author Werner Dietl
  48  *
  49  * @compile PackageProcessor.java
  50  * @compile -cp . -processor PackageProcessor mypackage/Anno.java mypackage/MyClass.java mypackage/package-info.java
  51  */
  52 
  53 @SupportedAnnotationTypes("*")
  54 public class PackageProcessor extends AbstractProcessor {
  55 
  56     private final AttributionTaskListener listener = new AttributionTaskListener();
  57     private final Set<Name> elements = new HashSet<Name>();
  58 
  59     @Override
  60     public final void init(ProcessingEnvironment env) {
  61         super.init(env);
  62         JavacTask.instance(env).addTaskListener(listener);
  63         Context ctx = ((JavacProcessingEnvironment)processingEnv).getContext();
  64         JavaCompiler compiler = JavaCompiler.instance(ctx);
  65         compiler.shouldStopPolicyIfNoError = CompileState.max(compiler.shouldStopPolicyIfNoError,
  66                 CompileState.FLOW);
  67     }
  68 
  69     @Override
  70     public final boolean process(Set<? extends TypeElement> annotations,
  71             RoundEnvironment roundEnv) {
  72         for (TypeElement elem : ElementFilter.typesIn(roundEnv.getRootElements())) {
  73             elements.add(elem.getQualifiedName());
  74         }
  75         return false;
  76     }
  77 
  78     @Override
  79     public SourceVersion getSupportedSourceVersion() {
  80         return SourceVersion.latest();
  81     }
  82 
  83     private final class AttributionTaskListener implements TaskListener {
  84         @Override
  85         public void started(TaskEvent e) { }
  86 
  87         @Override
  88         public void finished(TaskEvent e) {
  89             if (e.getKind() != TaskEvent.Kind.ANALYZE)
  90                 return;
  91 
  92             if (!elements.remove(e.getTypeElement().getQualifiedName()))
  93                 return;
  94 
  95             if (e.getTypeElement().getSimpleName().contentEquals("MyClass")) {
  96                 Element owner = e.getTypeElement().getEnclosingElement();
  97                 if (owner.getKind() != ElementKind.PACKAGE)
  98                     throw new RuntimeException("class owner should be a package: " + owner);
  99                 if (owner.getAnnotationMirrors().size() != 1)
 100                     throw new RuntimeException("the owner package should have one annotation: " + owner);
 101             }
 102         }
 103     }
 104 
 105 }