1 /*
   2  * Copyright (c) 2004, 2007, 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 import com.sun.mirror.apt.*;
  26 import com.sun.mirror.declaration.*;
  27 import com.sun.mirror.type.*;
  28 import com.sun.mirror.util.*;
  29 
  30 import java.util.Collection;
  31 import java.util.Set;
  32 import java.util.Arrays;
  33 import java.util.Collections;
  34 import java.io.*;
  35 
  36 public class PhantomTouch implements AnnotationProcessorFactory {
  37     static class PhantomTouchProc implements AnnotationProcessor {
  38         AnnotationProcessorEnvironment ape;
  39         PhantomTouchProc(AnnotationProcessorEnvironment ape) {
  40             this.ape = ape;
  41         }
  42 
  43         public void process() {
  44             // Only run the processor on the initial apt invocation
  45             if (ape.getSpecifiedTypeDeclarations().size() == 0) {
  46                 boolean result;
  47                 try {
  48                     // Create temporary file
  49                     java.io.File f = new java.io.File("touched");
  50                     result = f.createNewFile();
  51 
  52                     if (result) {
  53                         // Create new source file
  54                         PrintWriter pw = ape.getFiler().createSourceFile("HelloWorld");
  55                         pw.println("public class HelloWorld {");
  56                         pw.println("  // Phantom hello world");
  57                         pw.println("  public static void main(String argv[]) {");
  58                         pw.println("    System.out.println(\"Hello World\");");
  59                         pw.println("  }");
  60                         pw.println("}");
  61                     } else
  62                         throw new RuntimeException("touched file already exists!");
  63                 } catch (java.io.IOException e) {
  64                     result = false;
  65                 }
  66             }
  67         }
  68     }
  69 
  70     static final Collection<String> supportedOptions;
  71     static final Collection<String> supportedTypes;
  72 
  73     static {
  74         String options[] = {""};
  75         supportedOptions = Collections.unmodifiableCollection(Arrays.asList(options));
  76 
  77         String types[] = {"*"};
  78         supportedTypes = Collections.unmodifiableCollection(Arrays.asList(types));
  79     }
  80 
  81     public Collection<String> supportedAnnotationTypes() {return supportedTypes;}
  82     public Collection<String> supportedOptions() {return supportedOptions;}
  83 
  84 
  85     /*
  86      * Return the same processor independent of what annotations are
  87      * present, if any.
  88      */
  89     public AnnotationProcessor getProcessorFor(Set<AnnotationTypeDeclaration> atds,
  90                                         AnnotationProcessorEnvironment env) {
  91         return new PhantomTouchProc(env);
  92     }
  93 }