1 /*
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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
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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  *
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22  */
23 
24 /*
25  * @test
26  * @bug 8002099
27  * @summary Add support for intersection types in cast expression
28  * @modules jdk.compiler
29  */
30 
31 import com.sun.source.util.JavacTask;
32 import java.net.URI;
33 import java.util.Arrays;
34 import javax.tools.Diagnostic;
35 import javax.tools.JavaCompiler;
36 import javax.tools.JavaFileObject;
37 import javax.tools.SimpleJavaFileObject;
38 import javax.tools.StandardJavaFileManager;
39 import javax.tools.ToolProvider;
40 
41 public class IntersectionTypeParserTest {
42 
43     static int checkCount = 0;
44 
45     enum TypeKind {
46         SIMPLE("A"),
47         GENERIC("A<X>"),
48         WILDCARD("A<? super X, ? extends Y>");
49 
50         String typeStr;
51 
TypeKind(String typeStr)52         TypeKind(String typeStr) {
53             this.typeStr = typeStr;
54         }
55     }
56 
57     enum ArrayKind {
58         NONE(""),
59         SINGLE("[]"),
60         DOUBLE("[][]");
61 
62         String arrStr;
63 
ArrayKind(String arrStr)64         ArrayKind(String arrStr) {
65             this.arrStr = arrStr;
66         }
67     }
68 
69     static class Type {
70         TypeKind tk;
71         ArrayKind ak;
72 
Type(TypeKind tk, ArrayKind ak)73         Type(TypeKind tk, ArrayKind ak) {
74             this.tk = tk;
75             this.ak = ak;
76         }
77 
asString()78         String asString() {
79             return tk.typeStr + ak.arrStr;
80         }
81     }
82 
83     enum CastKind {
84         ONE("(#T0)", 1),
85         TWO("(#T0 & T1)", 2),
86         THREE("(#T0 & #T1 & #T2)", 3);
87 
88         String castTemplate;
89         int nBounds;
90 
CastKind(String castTemplate, int nBounds)91         CastKind(String castTemplate, int nBounds) {
92             this.castTemplate = castTemplate;
93             this.nBounds = nBounds;
94         }
95 
asString(Type... types)96         String asString(Type... types) {
97             String res = castTemplate;
98             for (int i = 0; i < nBounds ; i++) {
99                 res = res.replaceAll(String.format("#T%d", i), types[i].asString());
100             }
101             return res;
102         }
103     }
104 
main(String... args)105     public static void main(String... args) throws Exception {
106         //create default shared JavaCompiler - reused across multiple compilations
107         JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
108         try (StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null)) {
109 
110             for (CastKind ck : CastKind.values()) {
111                 for (TypeKind t1 : TypeKind.values()) {
112                     for (ArrayKind ak1 : ArrayKind.values()) {
113                         Type typ1 = new Type(t1, ak1);
114                         if (ck.nBounds == 1) {
115                             new IntersectionTypeParserTest(ck, typ1).run(comp, fm);
116                             continue;
117                         }
118                         for (TypeKind t2 : TypeKind.values()) {
119                             for (ArrayKind ak2 : ArrayKind.values()) {
120                                 Type typ2 = new Type(t2, ak2);
121                                 if (ck.nBounds == 2) {
122                                     new IntersectionTypeParserTest(ck, typ1, typ2).run(comp, fm);
123                                     continue;
124                                 }
125                                 for (TypeKind t3 : TypeKind.values()) {
126                                     for (ArrayKind ak3 : ArrayKind.values()) {
127                                         Type typ3 = new Type(t3, ak3);
128                                         new IntersectionTypeParserTest(ck, typ1, typ2, typ3).run(comp, fm);
129                                     }
130                                 }
131                             }
132                         }
133                     }
134                 }
135             }
136             System.out.println("Total check executed: " + checkCount);
137         }
138     }
139 
140     CastKind ck;
141     Type[] types;
142     JavaSource source;
143     DiagnosticChecker diagChecker;
144 
IntersectionTypeParserTest(CastKind ck, Type... types)145     IntersectionTypeParserTest(CastKind ck, Type... types) {
146         this.ck = ck;
147         this.types = types;
148         this.source = new JavaSource();
149         this.diagChecker = new DiagnosticChecker();
150     }
151 
152     class JavaSource extends SimpleJavaFileObject {
153 
154         String bodyTemplate = "class Test {\n" +
155                               "   void test() {\n" +
156                               "      Object o = #Cnull;\n" +
157                               "   } }";
158 
159         String source = "";
160 
JavaSource()161         public JavaSource() {
162             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
163             source += bodyTemplate.replaceAll("#C", ck.asString(types));
164         }
165 
166         @Override
getCharContent(boolean ignoreEncodingErrors)167         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
168             return source;
169         }
170     }
171 
run(JavaCompiler tool, StandardJavaFileManager fm)172     void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {
173         checkCount++;
174         JavacTask ct = (JavacTask)tool.getTask(null, fm, diagChecker,
175                 null, null, Arrays.asList(source));
176         ct.parse();
177         if (diagChecker.errorFound) {
178             throw new Error("Unexpected parser error for source:\n" +
179                 source.getCharContent(true));
180         }
181     }
182 
183     static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
184 
185         boolean errorFound;
186 
report(Diagnostic<? extends JavaFileObject> diagnostic)187         public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
188             if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
189                 errorFound = true;
190             }
191         }
192     }
193 }
194