Processor.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 java.io.IOException;
25import java.io.Writer;
26import java.lang.annotation.*;
27import java.util.Set;
28import javax.annotation.processing.*;
29import javax.lang.model.element.*;
30import javax.lang.model.util.ElementFilter;
31import javax.tools.*;
32import com.sun.tools.javac.util.Assert;
33
34public class Processor extends JavacTestingAbstractProcessor {
35    private boolean seenGenerated;
36
37    @Override
38    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
39        for (Element e : roundEnv.getElementsAnnotatedWith(Gen.class)) {
40            Gen gen = e.getAnnotation(Gen.class);
41            try {
42                JavaFileObject source = processingEnv.getFiler().createSourceFile(gen.fileName());
43
44                try (Writer out = source.openWriter()) {
45                    out.write(gen.content());
46                }
47            } catch (IOException ex) {
48                throw new IllegalStateException(ex);
49            }
50        }
51
52        TypeElement generated = processingEnv.getElementUtils().getTypeElement("Generated");
53
54        if (generated != null) {
55            Check check = ElementFilter.methodsIn(generated.getEnclosedElements()).get(0).getAnnotation(Check.class);
56
57            checkCorrectException(check::classValue, "java.lang.Class<java.lang.String>");
58            checkCorrectException(check::intConstValue, "boolean");
59            checkCorrectException(check::enumValue, "java.lang.String");
60            checkCorrectException(check::incorrectAnnotationValue, "java.lang.Deprecated");
61            checkCorrectException(check::incorrectArrayValue, "<any>");
62            checkCorrectException(check::incorrectClassValue, "<any>");
63
64            seenGenerated = true;
65        }
66
67        if (roundEnv.processingOver() && !seenGenerated) {
68            Assert.error("Did not see the generated class!");
69        }
70
71        return true;
72    }
73
74    private static void checkCorrectException(Runnable runCheck, String expectedType) {
75        try {
76            runCheck.run();
77            Assert.check(false); //Should not reach here
78        } catch (AnnotationTypeMismatchException ex) {
79            Assert.check(expectedType.equals(ex.foundType()), ex.foundType());
80        }
81    }
82
83}
84
85@interface Gen {
86    String fileName();
87    String content();
88}
89
90@interface Check {
91    Class<? extends Number> classValue();
92    int intConstValue();
93    E enumValue();
94    int incorrectAnnotationValue();
95    int incorrectArrayValue();
96    Class<?> incorrectClassValue();
97}
98
99enum E {
100    A;
101}
102