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 }