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 }