/*
* Copyright (c) 2010, 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.
*
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* questions.
*/
/*
* @test
* @bug 6863465
* @summary javac doesn't detect circular subclass dependencies via qualified names
* @run main TestCircularClassfile
*/
import java.io.*;
import java.net.URI;
import java.util.Arrays;
import javax.tools.Diagnostic;
import javax.tools.DiagnosticListener;
import javax.tools.JavaCompiler;
import javax.tools.JavaFileObject;
import javax.tools.SimpleJavaFileObject;
import javax.tools.ToolProvider;
import com.sun.source.util.JavacTask;
import java.util.EnumSet;
public class TestCircularClassfile {
enum ClassName {
A("A"),
B("B"),
C("C"),
OBJECT("Object");
String name;
ClassName(String name) {
this.name = name;
}
}
static class JavaSource extends SimpleJavaFileObject {
final static String sourceStub = "class #C extends #S {}";
String source;
public JavaSource(ClassName clazz, ClassName sup) {
super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
source = sourceStub.replace("#C", clazz.name).replace("#S", sup.name);
}
@Override
public CharSequence getCharContent(boolean ignoreEncodingErrors) {
return source;
}
}
public static void main(String... args) throws Exception {
int count = 0;
for (ClassName clazz : EnumSet.of(ClassName.A, ClassName.B, ClassName.C)) {
for (ClassName sup : EnumSet.of(ClassName.A, ClassName.B, ClassName.C)) {
if (sup.ordinal() < clazz.ordinal()) continue;
check("sub_"+count++, clazz, sup);
}
}
}
static JavaSource[] initialSources = new JavaSource[] {
new JavaSource(ClassName.A, ClassName.OBJECT),
new JavaSource(ClassName.B, ClassName.A),
new JavaSource(ClassName.C, ClassName.B)
};
static String workDir = System.getProperty("user.dir");
static void check(String destPath, ClassName clazz, ClassName sup) throws Exception {
File destDir = new File(workDir, destPath); destDir.mkdir();
final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
JavacTask ct = (JavacTask)tool.getTask(null, null, null,
Arrays.asList("-d", destPath), null, Arrays.asList(initialSources));
ct.generate();
File fileToRemove = new File(destPath, clazz.name + ".class");
fileToRemove.delete();
JavaSource newSource = new JavaSource(clazz, sup);
DiagnosticChecker checker = new DiagnosticChecker();
ct = (JavacTask)tool.getTask(null, null, checker,
Arrays.asList("-cp", destPath), null, Arrays.asList(newSource));
ct.analyze();
if (!checker.errorFound) {
throw new AssertionError(newSource.source);
}
}
static class DiagnosticChecker implements DiagnosticListener<JavaFileObject> {
boolean errorFound = false;
public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
if (diagnostic.getKind() == Diagnostic.Kind.ERROR &&
diagnostic.getCode().equals("compiler.err.cyclic.inheritance")) {
errorFound = true;
}
}
}
}