TestJavacTaskScanner.java revision 3294:9adfb22ff08f 
1/*
2 * Copyright (c) 2005, 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     4813736 8013256
27 * @summary Additional functionality test of task and JSR 269
28 * @author  Peter von der Ah\u00e9
29 * @library ./lib
30 * @modules jdk.compiler/com.sun.tools.javac.api
31 *          jdk.compiler/com.sun.tools.javac.code
32 *          jdk.compiler/com.sun.tools.javac.parser
33 *          jdk.compiler/com.sun.tools.javac.util
34 * @build ToolTester
35 * @run main TestJavacTaskScanner TestJavacTaskScanner.java
36 */
37
38import com.sun.tools.javac.api.JavacTaskImpl;
39import com.sun.tools.javac.parser.*;
40import com.sun.tools.javac.parser.Tokens.Token;
41import com.sun.tools.javac.util.*;
42
43import java.io.*;
44import java.net.*;
45import java.nio.*;
46import java.nio.charset.Charset;
47import java.util.Arrays;
48
49import javax.lang.model.element.Element;
50import javax.lang.model.element.TypeElement;
51import javax.lang.model.type.DeclaredType;
52import javax.lang.model.type.TypeMirror;
53import javax.lang.model.util.ElementFilter;
54import javax.lang.model.util.Elements;
55import javax.lang.model.util.Types;
56import javax.tools.*;
57
58import static javax.tools.StandardLocation.CLASS_PATH;
59import static javax.tools.StandardLocation.SOURCE_PATH;
60import static javax.tools.StandardLocation.CLASS_OUTPUT;
61
62public class TestJavacTaskScanner extends ToolTester {
63
64    final JavacTaskImpl task;
65    final Elements elements;
66    final Types types;
67
68    int numTokens;
69    int numParseTypeElements;
70    int numAllMembers;
71
72    TestJavacTaskScanner(File file) {
73        final Iterable<? extends JavaFileObject> compilationUnits =
74            fm.getJavaFileObjects(new File[] {file});
75        StandardJavaFileManager fm = getLocalFileManager(tool, null, null);
76        java.util.List<String> options = Arrays.asList("-XaddExports:"
77                + "jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED,"
78                + "jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED,"
79                + "jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED,"
80                + "jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED");
81        task = (JavacTaskImpl)tool.getTask(null, fm, null, options, null, compilationUnits);
82        task.getContext().put(ScannerFactory.scannerFactoryKey,
83                new MyScanner.Factory(task.getContext(), this));
84        elements = task.getElements();
85        types = task.getTypes();
86    }
87
88    public void run() {
89        Iterable<? extends TypeElement> toplevels;
90        toplevels = ElementFilter.typesIn(task.enter(task.parse()));
91        for (TypeElement clazz : toplevels) {
92            System.out.format("Testing %s:%n%n", clazz.getSimpleName());
93            testParseType(clazz);
94            testGetAllMembers(clazz);
95            System.out.println();
96            System.out.println();
97            System.out.println();
98        }
99
100        System.out.println("#tokens: " + numTokens);
101        System.out.println("#parseTypeElements: " + numParseTypeElements);
102        System.out.println("#allMembers: " + numAllMembers);
103
104        check(numTokens, "#Tokens", 1054);
105        check(numParseTypeElements, "#parseTypeElements", 158);
106        check(numAllMembers, "#allMembers", 52);
107    }
108
109    void check(int value, String name, int expected) {
110        // allow some slop in the comparison to allow for minor edits in the
111        // test and in the platform
112        if (value < expected * 9 / 10)
113            throw new Error(name + " lower than expected; expected " + expected + "; found: " + value);
114        if (value > expected * 11 / 10)
115            throw new Error(name + " higher than expected; expected " + expected + "; found: " + value);
116    }
117
118    void testParseType(TypeElement clazz) {
119        DeclaredType type = (DeclaredType)task.parseType("List<String>", clazz);
120        for (Element member : elements.getAllMembers((TypeElement)type.asElement())) {
121            TypeMirror mt = types.asMemberOf(type, member);
122            System.out.format("type#%d: %s : %s -> %s%n",
123                numParseTypeElements, member.getSimpleName(), member.asType(), mt);
124            numParseTypeElements++;
125        }
126    }
127
128    public static void main(String... args) throws IOException {
129        String srcdir = System.getProperty("test.src");
130        try (TestJavacTaskScanner t = new TestJavacTaskScanner(new File(srcdir, args[0]))) {
131            t.run();
132        }
133    }
134
135    private void testGetAllMembers(TypeElement clazz) {
136        for (Element member : elements.getAllMembers(clazz)) {
137            System.out.format("elem#%d: %s : %s%n",
138                numAllMembers, member.getSimpleName(), member.asType());
139            numAllMembers++;
140        }
141    }
142
143    /* Similar to ToolTester.getFileManager, except that this version also ensures
144     * javac classes will be available on the classpath.  The javac classes are assumed
145     * to be on the classpath used to run this test (this is true when using jtreg).
146     * The classes are found by obtaining the URL for a sample javac class, using
147     * getClassLoader().getResource(), and then deconstructing the URL to find the
148     * underlying directory or jar file to place on the classpath.
149     */
150    public StandardJavaFileManager getLocalFileManager(JavaCompiler tool,
151                                                        DiagnosticListener<JavaFileObject> dl,
152                                                        Charset encoding) {
153        StandardJavaFileManager fm = tool.getStandardFileManager(dl, null, encoding);
154        try {
155            fm.setLocation(SOURCE_PATH,  Arrays.asList(test_src));
156            fm.setLocation(CLASS_PATH,   test_class_path);
157            fm.setLocation(CLASS_OUTPUT, Arrays.asList(test_classes));
158        } catch (IOException e) {
159            throw new AssertionError(e);
160        }
161        return fm;
162    }
163}
164
165class MyScanner extends Scanner {
166
167    public static class Factory extends ScannerFactory {
168        public Factory(Context context, TestJavacTaskScanner test) {
169            super(context);
170            this.test = test;
171        }
172
173        @Override
174        public Scanner newScanner(CharSequence input, boolean keepDocComments) {
175            if (input instanceof CharBuffer) {
176                return new MyScanner(this, (CharBuffer)input, test);
177            } else {
178                char[] array = input.toString().toCharArray();
179                return newScanner(array, array.length, keepDocComments);
180            }
181        }
182
183        @Override
184        public Scanner newScanner(char[] input, int inputLength, boolean keepDocComments) {
185            return new MyScanner(this, input, inputLength, test);
186        }
187
188        private TestJavacTaskScanner test;
189    }
190    protected MyScanner(ScannerFactory fac, CharBuffer buffer, TestJavacTaskScanner test) {
191        super(fac, buffer);
192        this.test = test;
193    }
194    protected MyScanner(ScannerFactory fac, char[] input, int inputLength, TestJavacTaskScanner test) {
195        super(fac, input, inputLength);
196        this.test = test;
197    }
198
199    public void nextToken() {
200        super.nextToken();
201        Token tk = token();
202        System.err.format("Saw token %s %n", tk.kind);
203        test.numTokens++;
204    }
205
206    private TestJavacTaskScanner test;
207
208}
209