Java example source code file (TestDefaultMethodsSyntax.java)
The TestDefaultMethodsSyntax.java Java example source code/*
* Copyright (c) 2012, 2013, 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 7192245 8005851 8005166
* @summary Automatic test for checking set of allowed modifiers on interface methods
*/
import com.sun.source.util.JavacTask;
import java.net.URI;
import java.util.Arrays;
import java.util.List;
import javax.tools.Diagnostic;
import javax.tools.JavaCompiler;
import javax.tools.JavaFileObject;
import javax.tools.SimpleJavaFileObject;
import javax.tools.StandardJavaFileManager;
import javax.tools.ToolProvider;
public class TestDefaultMethodsSyntax {
static int checkCount = 0;
enum VersionKind {
PRE_LAMBDA("7"),
LAMBDA("8");
String versionString;
VersionKind(String versionString) {
this.versionString = versionString;
}
List<String> getOptions() {
return Arrays.asList("-XDallowStaticInterfaceMethods", "-source", versionString);
}
}
enum ModifierKind {
NONE(""),
PUBLIC("public"),
PROTECTED("protected"),
PRIVATE("private"),
ABSTRACT("abstract"),
STATIC("static"),
NATIVE("native"),
SYNCHRONIZED("synchronized"),
FINAL("final"),
STRICTFP("strictfp"),
DEFAULT("default");
String modStr;
private ModifierKind(String modStr) {
this.modStr = modStr;
}
static boolean intersect(ModifierKind mk, ModifierKind... mks) {
for (ModifierKind mk2 : mks) {
if (mk == mk2) return true;
}
return false;
}
static boolean compatible(MethodKind mk, ModifierKind mod1, ModifierKind mod2, EnclosingKind ek) {
if (intersect(ABSTRACT, mod1, mod2) || intersect(NATIVE, mod1, mod2)) {
return mk == MethodKind.NO_BODY;
} else if (intersect(DEFAULT, mod1, mod2) || intersect(STATIC, mod1, mod2)) {
return mk == MethodKind.BODY;
} else {
return ek == EnclosingKind.INTERFACE ?
mk == MethodKind.NO_BODY : mk == MethodKind.BODY;
}
}
boolean compatible(EnclosingKind ek) {
switch (this) {
case PRIVATE:
case PROTECTED:
return ek != EnclosingKind.INTERFACE;
default:
return true;
}
}
static boolean compatible(ModifierKind m1, ModifierKind m2, EnclosingKind ek) {
Result res1 = allowedModifierPairs[m1.ordinal()][m2.ordinal()];
Result res2 = allowedModifierPairs[m2.ordinal()][m1.ordinal()];
if (res1 != res2) {
throw new AssertionError(String.format("Ill-formed table: [%s,%s] != [%s,%s]", m1, m2, m2, m1));
} else {
return res1.compatible(ek, m1, m2);
}
}
interface Result {
boolean compatible(EnclosingKind ek, ModifierKind m1, ModifierKind m2);
}
static final Result T = new Result() {
@Override
public boolean compatible(EnclosingKind ek, ModifierKind m1, ModifierKind m2) {
return true;
}
};
static final Result F = new Result() {
@Override
public boolean compatible(EnclosingKind ek, ModifierKind m1, ModifierKind m2) {
return false;
}
};
static final Result C = new Result() {
@Override
public boolean compatible(EnclosingKind ek, ModifierKind m1, ModifierKind m2) {
return ek != EnclosingKind.INTERFACE;
}
};
static final Result I = new Result() {
@Override
public boolean compatible(EnclosingKind ek, ModifierKind m1, ModifierKind m2) {
return ek == EnclosingKind.INTERFACE;
}
};
static Result[][] allowedModifierPairs = {
/* NONE PUBLIC PROTECTED PRIVATE ABSTRACT STATIC NATIVE SYNCHRONIZED FINAL STRICTFP DEFAULT */
/* NONE */ { T , T , C , C , T , T , C , C , C , C , I },
/* PUBLIC */ { T , F , F , F , T , T , C , C , C , C , I },
/* PROTECTED */ { C , F , F , F , C , C , C , C , C , C , F },
/* PRIVATE */ { C , F , F , F , F , C , C , C , C , C , F },
/* ABSTRACT */ { T , T , C , F , F , F , F , F , F , F , F },
/* STATIC */ { T , T , C , C , F , F , C , C , C , T , F },
/* NATIVE */ { C , C , C , C , F , C , F , C , C , F , F },
/* SYNCHRONIZED */ { C , C , C , C , F , C , C , F , C , C , F },
/* FINAL */ { C , C , C , C , F , C , C , C , F , C , F },
/* STRICTFP */ { C , C , C , C , F , T , F , C , C , F , I },
/* DEFAULT */ { I , I , F , F , F , F , F , F , F , I , F }};
}
enum MethodKind {
NO_BODY("void m();"),
BODY("void m() { }");
String methStr;
private MethodKind(String methStr) {
this.methStr = methStr;
}
}
enum EnclosingKind {
ABSTRACT_CLASS("abstract class Test "),
INTERFACE("interface Test ");
String enclStr;
EnclosingKind(String enclStr) {
this.enclStr = enclStr;
}
}
public static void main(String... args) throws Exception {
//create default shared JavaCompiler - reused across multiple compilations
JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);
for (VersionKind vk : VersionKind.values()) {
for (EnclosingKind ek : EnclosingKind.values()) {
for (MethodKind mk : MethodKind.values()) {
for (ModifierKind modk1 : ModifierKind.values()) {
for (ModifierKind modk2 : ModifierKind.values()) {
new TestDefaultMethodsSyntax(vk, ek, mk, modk1, modk2).run(comp, fm);
}
}
}
}
}
System.out.println("Total check executed: " + checkCount);
}
VersionKind vk;
EnclosingKind ek;
MethodKind mk;
ModifierKind modk1, modk2;
JavaSource source;
DiagnosticChecker diagChecker;
TestDefaultMethodsSyntax(VersionKind vk, EnclosingKind ek, MethodKind mk, ModifierKind modk1, ModifierKind modk2) {
this.vk = vk;
this.ek = ek;
this.mk = mk;
this.modk1 = modk1;
this.modk2 = modk2;
this.source = new JavaSource();
this.diagChecker = new DiagnosticChecker();
}
class JavaSource extends SimpleJavaFileObject {
String template = "#EK {\n" +
" #MOD1 #MOD2 #METH\n" +
"}\n";
String source;
public JavaSource() {
super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
source = template.replaceAll("#EK", ek.enclStr)
.replaceAll("#MOD1", modk1.modStr)
.replaceAll("#MOD2", modk2.modStr)
.replaceAll("#METH", mk.methStr);
}
@Override
public CharSequence getCharContent(boolean ignoreEncodingErrors) {
return source;
}
}
void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {
JavacTask ct = (JavacTask)tool.getTask(null, fm, diagChecker,
vk.getOptions(), null, Arrays.asList(source));
try {
ct.analyze();
} catch (Throwable ex) {
throw new AssertionError("Error thrown when analyzing the following source:\n" + source.getCharContent(true));
}
check();
}
void check() {
boolean errorExpected = !ModifierKind.compatible(modk1, modk2, ek);
errorExpected |= !ModifierKind.compatible(mk, modk1, modk2, ek);
errorExpected |= !modk1.compatible(ek) || !modk2.compatible(ek);
errorExpected |= ModifierKind.intersect(ModifierKind.DEFAULT, modk1, modk2) &&
vk == VersionKind.PRE_LAMBDA;
errorExpected |= ModifierKind.intersect(ModifierKind.STATIC, modk1, modk2) &&
ek == EnclosingKind.INTERFACE && vk == VersionKind.PRE_LAMBDA;
checkCount++;
if (diagChecker.errorFound != errorExpected) {
throw new AssertionError("Problem when compiling source:\n" + source.getCharContent(true) +
"\nfound error: " + diagChecker.errorFound);
}
}
static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
boolean errorFound;
public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
errorFound = true;
}
}
}
}
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