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/*
* Copyright (c) 2006, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 6374357 6308351 6707027
* @summary PackageElement.getEnclosedElements() throws ClassReader$BadClassFileException
* @author Peter von der Ah\u00e9
* @modules jdk.compiler/com.sun.tools.javac.model
* @run main/othervm -Xmx256m Main
*/
import java.io.File;
import java.nio.file.Path;
import java.util.*;
import java.util.Map.Entry;
import javax.lang.model.element.Element;
import javax.lang.model.element.ElementKind;
import javax.lang.model.element.ModuleElement;
import javax.lang.model.element.PackageElement;
import javax.lang.model.element.TypeElement;
import javax.lang.model.util.Elements;
import javax.tools.*;
import com.sun.source.util.JavacTask;
import com.sun.tools.javac.model.JavacElements;
import static javax.tools.StandardLocation.CLASS_PATH;
import static javax.tools.StandardLocation.PLATFORM_CLASS_PATH;
import static javax.tools.JavaFileObject.Kind.CLASS;
public class Main {
public static PackageElement getPackage(TypeElement type) {
Element owner = type;
while (owner.getKind() != ElementKind.PACKAGE)
owner = owner.getEnclosingElement();
return (PackageElement)owner;
}
static int progress = 0;
static JavaCompiler tool;
static JavacTask javac;
static Elements elements;
static List<String> addmods_ALL_SYSTEM = Arrays.asList("--add-modules", "ALL-SYSTEM");
public static void main(String[] args) throws Exception {
JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
try (StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null)) {
fm.setLocation(CLASS_PATH, Collections.<File>emptyList());
JavacTask javac = (JavacTask)tool.getTask(null, fm, null, addmods_ALL_SYSTEM, null, null);
Elements elements = javac.getElements();
final Map<String, Set<String>> packages = new LinkedHashMap<>();
int nestedClasses = 0;
int classes = 0;
for (JavaFileObject file : fm.list(PLATFORM_CLASS_PATH, "", EnumSet.of(CLASS), true)) {
String type = fm.inferBinaryName(PLATFORM_CLASS_PATH, file);
if (type.endsWith("package-info"))
continue;
if (type.endsWith("module-info"))
continue;
Path path = fm.asPath(file);
int moduleIndex = path.getNameCount() - type.split("\\Q.\\E").length - 1;
String moduleName = path.getName(moduleIndex).toString();
if (moduleName.startsWith("jdk.incubator.")) //incubator modules not in module graph by default
continue;
try {
ModuleElement me = elements.getModuleElement(moduleName);
me.getClass();
TypeElement elem = ((JavacElements) elements).getTypeElement(me, type);
if (elem == null && type.indexOf('$') > 0) {
nestedClasses++;
type = null;
continue;
}
classes++;
String pack = getPackage(elem).getQualifiedName().toString();
packages.computeIfAbsent(me.getQualifiedName().toString(),
m -> new LinkedHashSet<>()).add(pack);
elem.getKind(); // force completion
type = null;
} finally {
if (type != null)
System.err.println("Looking at " + type);
}
}
javac = null;
elements = null;
javac = (JavacTask)tool.getTask(null, fm, null, addmods_ALL_SYSTEM, null, null);
elements = javac.getElements();
for (Entry<String, Set<String>> module2Packages : packages.entrySet()) {
ModuleElement me = elements.getModuleElement(module2Packages.getKey());
me.getClass();
for (String name : module2Packages.getValue()) {
PackageElement pe = ((JavacElements) elements).getPackageElement(me, name);
for (Element e : pe.getEnclosedElements()) {
e.getSimpleName().getClass();
}
}
}
/*
* A few sanity checks based on current values:
*
* packages: 775, classes: 12429 + 5917
*
* As the platform evolves the numbers are likely to grow
* monotonically but in case somebody gets a clever idea for
* limiting the number of packages exposed, this number might
* drop. So we test low values.
*/
System.out.format("packages: %s, classes: %s + %s%n",
packages.size(), classes, nestedClasses);
if (classes < 9000)
throw new AssertionError("Too few classes in PLATFORM_CLASS_PATH ;-)");
if (packages.values().stream().flatMap(packs -> packs.stream()).count() < 530)
throw new AssertionError("Too few packages in PLATFORM_CLASS_PATH ;-)");
if (nestedClasses < 3000)
throw new AssertionError("Too few nested classes in PLATFORM_CLASS_PATH ;-)");
}
}
}
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