GenerateSuperInterfaceProcessor.java revision 3294:9adfb22ff08f 
1/*
2 * Copyright (c) 2013, 2015, 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 com.sun.tools.javac.util.Assert;
25
26import java.io.IOException;
27import java.io.OutputStream;
28import java.util.Set;
29import javax.annotation.processing.AbstractProcessor;
30import javax.annotation.processing.RoundEnvironment;
31import javax.annotation.processing.SupportedAnnotationTypes;
32import javax.lang.model.element.Element;
33import javax.lang.model.element.TypeElement;
34
35@SupportedAnnotationTypes("*")
36public class GenerateSuperInterfaceProcessor extends AbstractProcessor {
37
38    @Override
39    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
40        for (Element el : roundEnv.getElementsAnnotatedWith(Generate.class)) {
41            Generate g = el.getAnnotation(Generate.class);
42
43            Assert.checkNonNull(g);
44
45            try (OutputStream out =
46                    processingEnv.getFiler().createSourceFile(g.fileName()).openOutputStream()) {
47                out.write(g.content().getBytes());
48            } catch (IOException ex) {
49                throw new IllegalStateException(ex);
50            }
51        }
52
53        return false;
54    }
55
56}
57
58@interface Generate {
59    String fileName();
60    String content();
61}
62