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
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
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22  */
23 
24 import java.io.PrintStream;
25 import java.nio.file.Path;
26 import java.util.EnumSet;
27 import java.util.List;
28 import java.util.Set;
29 
30 import javax.lang.model.element.ModuleElement;
31 import javax.lang.model.element.ModuleElement.Directive;
32 import javax.lang.model.element.ModuleElement.DirectiveKind;
33 import javax.lang.model.element.ModuleElement.DirectiveVisitor;
34 import javax.lang.model.element.ModuleElement.ExportsDirective;
35 import javax.lang.model.element.ModuleElement.OpensDirective;
36 import javax.lang.model.element.ModuleElement.ProvidesDirective;
37 import javax.lang.model.element.ModuleElement.RequiresDirective;
38 import javax.lang.model.element.ModuleElement.UsesDirective;
39 import javax.tools.JavaCompiler;
40 import javax.tools.JavaFileObject;
41 import javax.tools.StandardJavaFileManager;
42 import javax.tools.ToolProvider;
43 
44 import com.sun.source.util.JavacTask;
45 
46 /*
47  * @test
48  * @bug 8175118
49  * @summary Add ModuleElement.DirectiveVisitor
50  * @library /tools/lib
51  * @modules jdk.compiler/com.sun.tools.javac.api
52  *          jdk.compiler/com.sun.tools.javac.main
53  *          jdk.compiler/com.sun.tools.javac.util
54  * @build toolbox.ToolBox ModuleTestBase
55  * @run main DirectiveVisitorTest
56  */
57 
58 public class DirectiveVisitorTest extends ModuleTestBase {
main(String... args)59     public static void main(String... args) throws Exception {
60         new DirectiveVisitorTest().runTests();
61     }
62 
63     @Test
testVisitor(Path base)64     public void testVisitor(Path base) throws Exception {
65         Path src = base.resolve("src");
66         Path src_m1 = src.resolve("m1x");
67         tb.writeJavaFiles(src_m1,
68                           "module m1x { "
69                           + " requires m2x;"
70                           + " exports p1;"
71                           + " opens p2;"
72                           + " uses p1.Service;"
73                           + " provides p1.Service with p2.Impl;"
74                           + "}",
75                           "package p1; public interface Service { }",
76                           "package p2; public class Impl implements p1.Service { }");
77         Path src_m2 = src.resolve("m2x");
78         tb.writeJavaFiles(src_m2,
79                           "module m2x { }");
80 
81         Path modules = base.resolve("modules");
82         tb.createDirectories(modules);
83 
84         JavaCompiler javac = ToolProvider.getSystemJavaCompiler();
85         try (StandardJavaFileManager fm = javac.getStandardFileManager(null, null, null)) {
86             Iterable<? extends JavaFileObject> files = fm.getJavaFileObjects(findJavaFiles(src));
87             List<String> options = List.of(
88                     "--module-source-path", src.toString(),
89                     "-d", modules.toString()
90             );
91             JavacTask t = (JavacTask) javac.getTask(null, fm, null, options, null, files);
92             t.analyze();
93             ModuleElement e = t.getElements().getModuleElement("m1x");
94             Set<DirectiveKind> kinds = EnumSet.<DirectiveKind>allOf(DirectiveKind.class);
95             Visitor v = new Visitor();
96             v.visit(e, kinds);
97             if (!kinds.equals(EnumSet.<DirectiveKind>noneOf(DirectiveKind.class))) {
98                 error("Some kinds not found: " + kinds);
99             }
100         }
101     }
102 
103     static class Visitor implements DirectiveVisitor<Void,Set<DirectiveKind>> {
104         private final PrintStream out = System.err;
105 
visit(ModuleElement e, Set<DirectiveKind> kinds)106         public void visit(ModuleElement e, Set<DirectiveKind> kinds) {
107             e.getDirectives().stream().forEach(d -> visit(d, kinds));
108         }
109 
110         @Override
visitRequires(RequiresDirective d, Set<DirectiveKind> kinds)111         public Void visitRequires(RequiresDirective d, Set<DirectiveKind> kinds) {
112             visitAny(d, kinds);
113             return null;
114         }
115 
116         @Override
visitExports(ExportsDirective d, Set<DirectiveKind> kinds)117         public Void visitExports(ExportsDirective d, Set<DirectiveKind> kinds) {
118             visitAny(d, kinds);
119             return null;
120         }
121 
122         @Override
visitOpens(OpensDirective d, Set<DirectiveKind> kinds)123         public Void visitOpens(OpensDirective d, Set<DirectiveKind> kinds) {
124             visitAny(d, kinds);
125             return null;
126         }
127 
128         @Override
visitUses(UsesDirective d, Set<DirectiveKind> kinds)129         public Void visitUses(UsesDirective d, Set<DirectiveKind> kinds) {
130             visitAny(d, kinds);
131             return null;
132         }
133 
134         @Override
visitProvides(ProvidesDirective d, Set<DirectiveKind> kinds)135         public Void visitProvides(ProvidesDirective d, Set<DirectiveKind> kinds) {
136             visitAny(d, kinds);
137             return null;
138         }
139 
visitAny(Directive d, Set<DirectiveKind> kinds)140         private void visitAny(Directive d, Set<DirectiveKind> kinds) {
141             out.println("visit: " + d);
142             kinds.remove(d.getKind());
143         }
144     }
145 }
146 
147