1 /*
2  * Copyright (c) 2014, 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
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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 8031967
27  * @summary Ensure javac can handle very deeply nested chain of method invocations occurring as
28  *          a parameter to other method invocations.
29  * @modules jdk.compiler
30  * @run main T8031967
31  */
32 
33 import java.io.IOException;
34 import java.net.URI;
35 import java.util.Arrays;
36 import java.util.List;
37 
38 import javax.tools.DiagnosticListener;
39 import javax.tools.JavaCompiler;
40 import javax.tools.JavaFileObject;
41 import javax.tools.SimpleJavaFileObject;
42 import javax.tools.ToolProvider;
43 
44 import com.sun.source.util.JavacTask;
45 
46 public class T8031967 {
47 
main(String... args)48     public static void main(String... args) throws IOException {
49         new T8031967().run();
50     }
51 
52     final int depth = 50;
53 
run()54     private void run() throws IOException {
55         runTestCase(true);
56         runTestCase(false);
57     }
58 
runTestCase(boolean withErrors)59     private void runTestCase(boolean withErrors) throws IOException {
60         StringBuilder code = new StringBuilder();
61 
62         code.append("public class Test {\n" +
63                     "    private void test() {\n" +
64                     "        GroupLayout l = new GroupLayout();\n" +
65                     "        l.setHorizontalGroup(\n");
66 
67         gen(code, depth);
68         code.append("        );\n" +
69                     "    }\n");
70         if (!withErrors) {
71             code.append("    class GroupLayout {\n" +
72                         "        ParallelGroup createParallelGroup() {return null;}\n" +
73                         "        ParallelGroup createParallelGroup(int i) {return null;}\n" +
74                         "        ParallelGroup createParallelGroup(int i, int j) {return null;}\n" +
75                         "        void setHorizontalGroup(Group g) { }\n" +
76                         "    }\n" +
77                         "    \n" +
78                         "    class Group {\n" +
79                         "        Group addGroup(Group g) { return this; }\n" +
80                         "        Group addGroup(int i, Group g) { return this; }\n" +
81                         "        Group addGap(int i) { return this; }\n" +
82                         "        Group addGap(long l) { return this; }\n" +
83                         "        Group addGap(int i, int j) { return this; }\n" +
84                         "        Group addComponent(Object c) { return this; }\n" +
85                         "        Group addComponent(int i, Object c) { return this; }\n" +
86                         "    }\n" +
87                         "    class ParallelGroup extends Group {\n" +
88                         "        Group addGroup(Group g) { return this; }\n" +
89                         "        Group addGroup(int i, Group g) { return this; }\n" +
90                         "        Group addGap(int i) { return this; }\n" +
91                         "        Group addGap(int i, int j) { return this; }\n" +
92                         "        Group addComponent(Object c) { return this; }\n" +
93                         "        Group addComponent(int i, Object c) { return this; }\n" +
94                         "    }\n");
95         }
96 
97         code.append("}\n");
98 
99         JavaSource source = new JavaSource(code.toString());
100         List<JavaSource> sourceList = Arrays.asList(source);
101         JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
102         DiagnosticListener<JavaFileObject> noErrors = (diagnostic) -> {
103             throw new IllegalStateException("Should not produce errors: " + diagnostic);
104         };
105         JavacTask task = (JavacTask) compiler.getTask(null, null, withErrors ? null : noErrors,
106                 null, null, sourceList);
107 
108         task.analyze();
109     }
110 
gen(StringBuilder code, int depth)111     private void gen(StringBuilder code, int depth) {
112         code.append("l.createParallelGroup()\n");
113         if (depth > 0) {
114             code.append(".addGroup(\n");
115             gen(code, depth - 1);
116             code.append(")");
117         }
118 
119         code.append(".addGap(1)\n" +
120                     ".addComponent(new Object())\n" +
121                     ".addGap(1)\n" +
122                     ".addComponent(new Object())");
123     }
124 
125     class JavaSource extends SimpleJavaFileObject {
126 
127         final String code;
JavaSource(String code)128         public JavaSource(String code) {
129             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
130             this.code = code;
131         }
132 
133         @Override
getCharContent(boolean ignoreEncodingErrors)134         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
135             return code;
136         }
137     }
138 }
139