MyProcessor.java revision 3170:dc017a37aac5 
1/*
2 * Copyright (c) 2010, 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.util.Set;
25import javax.annotation.processing.*;
26import javax.lang.model.element.*;
27import javax.lang.model.util.ElementFilter;
28import javax.lang.model.SourceVersion;
29import static javax.tools.Diagnostic.Kind.*;
30
31@SupportedAnnotationTypes("*")
32public class MyProcessor extends AbstractProcessor {
33    private Messager messager;
34    public void init(ProcessingEnvironment processingEnv) {
35        this.messager = processingEnv.getMessager();
36    }
37
38    public boolean process(Set<? extends TypeElement> tes, RoundEnvironment renv) {
39        if (!renv.processingOver()) {
40            for(TypeElement e : ElementFilter.typesIn(renv.getRootElements())) {
41                for (TypeParameterElement tp : e.getTypeParameters()) {
42                    if (tp.getSimpleName().toString().length() > 1) {
43                        messager.printMessage(WARNING,
44                            "Type param names should be of length 1", tp);
45                    }
46                }
47            }
48        }
49        return true;
50    }
51
52    public SourceVersion getSupportedSourceVersion() {
53        return SourceVersion.latest();
54    }
55}
56