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
24/*
25 * @test
26 * @bug 8023522
27 * @summary test Pretty print of type annotations
28 * @author wmdietl
29 * @modules jdk.compiler/com.sun.tools.javac.api
30 *          jdk.compiler/com.sun.tools.javac.tree
31 */
32
33import com.sun.source.tree.ClassTree;
34import com.sun.source.tree.CompilationUnitTree;
35import com.sun.tools.javac.api.JavacTaskImpl;
36import com.sun.tools.javac.tree.JCTree;
37
38import java.io.IOException;
39import java.net.URI;
40import java.util.Arrays;
41import java.util.List;
42import java.util.LinkedList;
43
44import javax.tools.JavaCompiler;
45import javax.tools.JavaFileManager;
46import javax.tools.JavaFileObject;
47import javax.tools.SimpleJavaFileObject;
48import javax.tools.ToolProvider;
49
50public class TypeAnnotationsPretty {
51    private final JavaCompiler tool;
52
53    TypeAnnotationsPretty() {
54        tool = ToolProvider.getSystemJavaCompiler();
55    }
56
57    private List<String> matches = new LinkedList<String>();
58    private List<String> mismatches = new LinkedList<String>();
59
60    public static void main(String... args) throws Exception {
61        TypeAnnotationsPretty tap = new TypeAnnotationsPretty();
62
63        tap.runField("@TA()\nObject cls = null");
64        tap.runField("@TA()\nObject cls = new @TA() Object()");
65
66        tap.runField("@TA()\nList<@TB() Object> cls = null");
67        tap.runField("@TA()\nList<@TB() Object> cls = new @TA() LinkedList<@TB() Object>()");
68
69        tap.runField("Class[] cls = null");
70        tap.runField("@TA()\nClass[] cls = null");
71        tap.runField("Class @TA() [] cls = null");
72        tap.runField("@TA()\nClass @TB() [] cls = null");
73
74        tap.runField("Class[] cls = new Class[]{Object.class}");
75        tap.runField("@TA()\nClass[] cls = new @TA() Class[]{Object.class}");
76        tap.runField("Class @TB() [] cls = new Class @TB() []{Object.class}");
77        tap.runField("@TA()\nClass @TB() [] cls = new @TA() Class @TB() []{Object.class}");
78        tap.runField("@TA()\nClass @TB() [] @TC() [] cls = new @TA() Class @TB() [10] @TC() []");
79        tap.runField("Class @TB() [] @TC() [] cls = new Class @TB() [10] @TC() []");
80        tap.runField("@TA()\nClass @TB() [] @TC() [] @TD() [] cls = new @TA() Class @TB() [10] @TC() [] @TD() []");
81
82        tap.runMethod("\n@TA()\nObject test(@TB()\nList<@TC() String> p) {\n" +
83                "    return null;\n" +
84                "}");
85
86
87        if (!tap.matches.isEmpty()) {
88            for (String m : tap.matches)
89                System.out.println(m);
90        }
91        if (!tap.mismatches.isEmpty()) {
92            for (String mm : tap.mismatches)
93                System.err.println(mm + NL);
94            throw new RuntimeException("Tests failed!");
95        }
96    }
97
98    private static final String prefix =
99            "import java.lang.annotation.*;" +
100            "import java.util.*;" +
101            "public class Test {";
102
103    private static final String postfix =
104            "@Target(ElementType.TYPE_USE)" +
105            "@interface TA {}" +
106            "@Target(ElementType.TYPE_USE)" +
107            "@interface TB {}" +
108            "@Target(ElementType.TYPE_USE)" +
109            "@interface TC {}" +
110            "@Target(ElementType.TYPE_USE)" +
111            "@interface TD {}";
112
113    private static final String NL = System.getProperty("line.separator");
114
115    private void runField(String code) throws IOException {
116        String src = prefix +
117                code + "; }" +
118                postfix;
119
120        try (JavaFileManager fm = tool.getStandardFileManager(null, null, null)) {
121            JavacTaskImpl ct = (JavacTaskImpl) tool.getTask(null, fm, null, null,
122                    null, Arrays.asList(new MyFileObject(src)));
123
124            for (CompilationUnitTree cut : ct.parse()) {
125                JCTree.JCVariableDecl var =
126                        (JCTree.JCVariableDecl) ((ClassTree) cut.getTypeDecls().get(0)).getMembers().get(0);
127                checkMatch(code, var);
128            }
129        }
130    }
131
132    private void runMethod(String code) throws IOException {
133        String src = prefix +
134                code + "}" +
135                postfix;
136
137        try (JavaFileManager fm = tool.getStandardFileManager(null, null, null)) {
138            JavacTaskImpl ct = (JavacTaskImpl) tool.getTask(null, fm, null, null,
139                    null, Arrays.asList(new MyFileObject(src)));
140
141
142            for (CompilationUnitTree cut : ct.parse()) {
143                JCTree.JCMethodDecl meth =
144                        (JCTree.JCMethodDecl) ((ClassTree) cut.getTypeDecls().get(0)).getMembers().get(0);
145                checkMatch(code, meth);
146            }
147        }
148    }
149
150    void checkMatch(String code, JCTree tree) {
151        String expect = code.replace("\n", NL);
152        String found = tree.toString();
153        if (!expect.equals(found)) {
154            mismatches.add("Expected: " + expect + NL +
155                    "Obtained: " + found);
156        } else {
157            matches.add("Passed: " + expect);
158        }
159    }
160}
161
162
163class MyFileObject extends SimpleJavaFileObject {
164
165    private String text;
166
167    public MyFileObject(String text) {
168        super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
169        this.text = text;
170    }
171
172    @Override
173    public CharSequence getCharContent(boolean ignoreEncodingErrors) {
174        return text;
175    }
176}
177