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 Touch implements AnnotationProcessorFactory {
  37     static class TouchProc implements AnnotationProcessor {
  38         AnnotationProcessorEnvironment ape;
  39         TouchProc(AnnotationProcessorEnvironment ape) {
  40             this.ape = ape;
  41         }
  42 
  43         public void process() {
  44             boolean result;
  45             // Only run the processor on the initial apt invocation
  46             Collection<TypeDeclaration> tdecls = ape.getSpecifiedTypeDeclarations();
  47 
  48             if (tdecls.size() == 1) {
  49                 for(TypeDeclaration decl: tdecls) {
  50                     if (! decl.getSimpleName().equals("Touch") )
  51                         return;
  52                 }
  53 
  54                 try {
  55                     // Create temporary file
  56                     java.io.File f = new java.io.File("touched");
  57                     result = f.createNewFile();
  58 
  59 
  60                     Filer filer = ape.getFiler();
  61 
  62                     // Create new source file
  63                     PrintWriter pw = filer.createSourceFile("HelloWorld");
  64                     pw.println("public class HelloWorld {");
  65                     pw.println("  public static void main(String argv[]) {");
  66                     pw.println("    System.out.println(\"Hello World\");");
  67                     pw.println("  }");
  68                     pw.println("}");
  69 
  70                     // Create new class file and copy Empty.class
  71                     OutputStream os = filer.createClassFile("Empty");
  72                     FileInputStream fis = new FileInputStream("Empty.clazz");
  73                     int datum;
  74                     while((datum = fis.read()) != -1)
  75                         os.write(datum);
  76 
  77                 } catch (java.io.IOException e) {
  78                     result = false;
  79                 }
  80                 if (!result)
  81                     throw new RuntimeException("touched file already exists or other error");
  82             }
  83 
  84         }
  85 
  86     }
  87 
  88     static Collection<String> supportedTypes;
  89     static {
  90         String types[] = {"*"};
  91         supportedTypes = Collections.unmodifiableCollection(Arrays.asList(types));
  92     }
  93 
  94     static Collection<String> supportedOptions;
  95     static {
  96         String options[] = {""};
  97         supportedOptions = Collections.unmodifiableCollection(Arrays.asList(options));
  98     }
  99 
 100     public Collection<String> supportedOptions() {
 101         return supportedOptions;
 102     }
 103 
 104     public Collection<String> supportedAnnotationTypes() {
 105         return supportedTypes;
 106     }
 107 
 108     /*
 109      * Return the same processor independent of what annotations are
 110      * present, if any.
 111      */
 112     public AnnotationProcessor getProcessorFor(Set<AnnotationTypeDeclaration> atds,
 113                                         AnnotationProcessorEnvironment env) {
 114         return new TouchProc(env);
 115     }
 116 }