1/*
2 * Copyright (c) 2006, 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
24import java.io.*;
25import javax.annotation.processing.*;
26import javax.lang.model.element.*;
27import javax.lang.model.type.*;
28import javax.lang.model.util.*;
29import static javax.tools.Diagnostic.Kind.*;
30
31import java.util.Set;
32
33@SupportedAnnotationTypes({"*"})
34public class HelloWorldAP extends AbstractProcessor {
35    Messager msgr = null;
36    Filer filer = null;
37    boolean DONE=false;
38
39    @Override
40    public void init(ProcessingEnvironment penv) {
41        processingEnv = penv;
42        msgr=penv.getMessager();
43        filer=penv.getFiler();
44    }
45
46    public boolean process(Set<? extends TypeElement> tes, RoundEnvironment renv ) {
47        boolean ret = true;
48        if(!renv.processingOver() && !DONE) {
49            msgr.printMessage(NOTE, "running process to create HelloWorld.");
50            try {
51                Writer pw = filer.createSourceFile("HelloWorld").openWriter();
52                pw.write("public class HelloWorld {\n");
53                pw.write("  public static void main (String argv[]) {\n");
54                pw.write("    System.out.println(\"Hello apt world.\");\n");
55                pw.write("  }\n");
56                pw.write("}\n");
57                pw.flush();
58                pw.close();
59
60                OutputStream os = filer.createClassFile("HelloWorldAP").openOutputStream();
61                // the easiest way to create a class file is to copy another one
62                InputStream is = getClass().getResourceAsStream("HelloWorldAP.class");
63                copy(is, os);
64                is.close();
65                os.flush();
66                os.close();
67                DONE=true;
68            }
69            catch (IOException ioe) {
70                msgr.printMessage(ERROR, ioe.getMessage());
71                ret = false;
72            }
73            catch (Exception e) {
74                msgr.printMessage(ERROR, e.getMessage());
75                ret = false;
76            }
77        }
78        return ret;
79    }
80
81    void copy(InputStream is, OutputStream os) throws IOException {
82        byte[] buf = new byte[8192];
83        int n;
84        while ((n = is.read(buf, 0, buf.length)) > 0)
85            os.write(buf, 0, n);
86    }
87}
88