Main.java revision 3905:dda71e3922d7 
1/*
2 * Copyright (c) 2006, 2017, 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 * @modules jdk.compiler/com.sun.tools.javac.model
30 * @run main/othervm -Xmx256m Main
31 */
32
33import java.io.File;
34import java.nio.file.Path;
35import java.util.*;
36import java.util.Map.Entry;
37
38import javax.lang.model.element.Element;
39import javax.lang.model.element.ElementKind;
40import javax.lang.model.element.ModuleElement;
41import javax.lang.model.element.PackageElement;
42import javax.lang.model.element.TypeElement;
43import javax.lang.model.util.Elements;
44import javax.tools.*;
45
46import com.sun.source.util.JavacTask;
47import com.sun.tools.javac.model.JavacElements;
48
49import static javax.tools.StandardLocation.CLASS_PATH;
50import static javax.tools.StandardLocation.PLATFORM_CLASS_PATH;
51import static javax.tools.JavaFileObject.Kind.CLASS;
52
53
54public class Main {
55
56    public static PackageElement getPackage(TypeElement type) {
57        Element owner = type;
58        while (owner.getKind() != ElementKind.PACKAGE)
59            owner = owner.getEnclosingElement();
60        return (PackageElement)owner;
61    }
62
63    static int progress = 0;
64    static JavaCompiler tool;
65    static JavacTask javac;
66    static Elements elements;
67
68    static List<String> addmods_ALL_SYSTEM = Arrays.asList("--add-modules", "ALL-SYSTEM");
69
70    public static void main(String[] args) throws Exception {
71        JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
72        try (StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null)) {
73            fm.setLocation(CLASS_PATH, Collections.<File>emptyList());
74            JavacTask javac = (JavacTask)tool.getTask(null, fm, null, addmods_ALL_SYSTEM, null, null);
75            Elements elements = javac.getElements();
76
77            final Map<String, Set<String>> packages = new LinkedHashMap<>();
78
79            int nestedClasses = 0;
80            int classes = 0;
81
82            for (JavaFileObject file : fm.list(PLATFORM_CLASS_PATH, "", EnumSet.of(CLASS), true)) {
83                String type = fm.inferBinaryName(PLATFORM_CLASS_PATH, file);
84                if (type.endsWith("package-info"))
85                    continue;
86                if (type.endsWith("module-info"))
87                    continue;
88                Path path = fm.asPath(file);
89                int moduleIndex = path.getNameCount() - type.split("\\Q.\\E").length - 1;
90                String moduleName = path.getName(moduleIndex).toString();
91                if (moduleName.startsWith("jdk.incubator.")) //incubator modules not in module graph by default
92                    continue;
93                try {
94                    ModuleElement me = elements.getModuleElement(moduleName);
95                    me.getClass();
96                    TypeElement elem = ((JavacElements) elements).getTypeElement(me, type);
97                    if (elem == null && type.indexOf('$') > 0) {
98                        nestedClasses++;
99                        type = null;
100                        continue;
101                    }
102                    classes++;
103                    String pack = getPackage(elem).getQualifiedName().toString();
104                    packages.computeIfAbsent(me.getQualifiedName().toString(),
105                                             m -> new LinkedHashSet<>()).add(pack);
106                    elem.getKind(); // force completion
107                    type = null;
108                } finally {
109                    if (type != null)
110                        System.err.println("Looking at " + type);
111                }
112            }
113            javac = null;
114            elements = null;
115
116            javac = (JavacTask)tool.getTask(null, fm, null, addmods_ALL_SYSTEM, null, null);
117            elements = javac.getElements();
118
119            for (Entry<String, Set<String>> module2Packages : packages.entrySet()) {
120                ModuleElement me = elements.getModuleElement(module2Packages.getKey());
121                me.getClass();
122                for (String name : module2Packages.getValue()) {
123                    PackageElement pe = ((JavacElements) elements).getPackageElement(me, name);
124                    for (Element e : pe.getEnclosedElements()) {
125                        e.getSimpleName().getClass();
126                    }
127                }
128            }
129            /*
130             * A few sanity checks based on current values:
131             *
132             * packages: 775, classes: 12429 + 5917
133             *
134             * As the platform evolves the numbers are likely to grow
135             * monotonically but in case somebody gets a clever idea for
136             * limiting the number of packages exposed, this number might
137             * drop.  So we test low values.
138             */
139            System.out.format("packages: %s, classes: %s + %s%n",
140                              packages.size(), classes, nestedClasses);
141            if (classes < 9000)
142                throw new AssertionError("Too few classes in PLATFORM_CLASS_PATH ;-)");
143            if (packages.values().stream().flatMap(packs -> packs.stream()).count() < 530)
144                throw new AssertionError("Too few packages in PLATFORM_CLASS_PATH ;-)");
145            if (nestedClasses < 3000)
146                throw new AssertionError("Too few nested classes in PLATFORM_CLASS_PATH ;-)");
147        }
148    }
149}
150