Main.java revision 2721:f7ce2cfa4cdb 
1/*
2 * Copyright (c) 2006, 2014, 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     6374357 6308351 6707027
27 * @summary PackageElement.getEnclosedElements() throws ClassReader$BadClassFileException
28 * @author  Peter von der Ah\u00e9
29 * @run main/othervm -Xmx256m Main
30 */
31
32import java.io.File;
33import java.util.*;
34import javax.lang.model.element.Element;
35import javax.lang.model.element.ElementKind;
36import javax.lang.model.element.PackageElement;
37import javax.lang.model.element.TypeElement;
38import javax.lang.model.util.Elements;
39import javax.tools.*;
40import com.sun.source.util.JavacTask;
41
42import static javax.tools.StandardLocation.CLASS_PATH;
43import static javax.tools.StandardLocation.PLATFORM_CLASS_PATH;
44import static javax.tools.JavaFileObject.Kind.CLASS;
45
46
47public class Main {
48
49    public static PackageElement getPackage(TypeElement type) {
50        Element owner = type;
51        while (owner.getKind() != ElementKind.PACKAGE)
52            owner = owner.getEnclosingElement();
53        return (PackageElement)owner;
54    }
55
56    static int progress = 0;
57    static JavaCompiler tool;
58    static JavacTask javac;
59    static Elements elements;
60
61    public static void main(String[] args) throws Exception {
62        JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
63        try (StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null)) {
64            fm.setLocation(CLASS_PATH, Collections.<File>emptyList());
65            JavacTask javac = (JavacTask)tool.getTask(null, fm, null, null, null, null);
66            Elements elements = javac.getElements();
67
68            final Set<String> packages = new LinkedHashSet<String>();
69
70            int nestedClasses = 0;
71            int classes = 0;
72
73            for (JavaFileObject file : fm.list(PLATFORM_CLASS_PATH, "", EnumSet.of(CLASS), true)) {
74                String type = fm.inferBinaryName(PLATFORM_CLASS_PATH, file);
75                if (type.endsWith("package-info"))
76                    continue;
77                try {
78                    TypeElement elem = elements.getTypeElement(type);
79                    if (elem == null && type.indexOf('$') > 0) {
80                        nestedClasses++;
81                        type = null;
82                        continue;
83                    }
84                    classes++;
85                    packages.add(getPackage(elem).getQualifiedName().toString());
86                    elements.getTypeElement(type).getKind(); // force completion
87                    type = null;
88                } finally {
89                    if (type != null)
90                        System.err.println("Looking at " + type);
91                }
92            }
93            javac = null;
94            elements = null;
95
96            javac = (JavacTask)tool.getTask(null, fm, null, null, null, null);
97            elements = javac.getElements();
98
99            for (String name : packages) {
100                PackageElement pe = elements.getPackageElement(name);
101                for (Element e : pe.getEnclosedElements()) {
102                    e.getSimpleName().getClass();
103                }
104            }
105            /*
106             * A few sanity checks based on current values:
107             *
108             * packages: 775, classes: 12429 + 5917
109             *
110             * As the platform evolves the numbers are likely to grow
111             * monotonically but in case somebody gets a clever idea for
112             * limiting the number of packages exposed, this number might
113             * drop.  So we test low values.
114             */
115            System.out.format("packages: %s, classes: %s + %s%n",
116                              packages.size(), classes, nestedClasses);
117            if (classes < 9000)
118                throw new AssertionError("Too few classes in PLATFORM_CLASS_PATH ;-)");
119            if (packages.size() < 530)
120                throw new AssertionError("Too few packages in PLATFORM_CLASS_PATH ;-)");
121            if (nestedClasses < 3000)
122                throw new AssertionError("Too few nested classes in PLATFORM_CLASS_PATH ;-)");
123        }
124    }
125}
126