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/*
* Copyright (c) 2022, 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 8266670
* @summary Test expected AccessFlag's on methods and parameters
* @compile -parameters MethodAccessFlagTest.java
* @run main MethodAccessFlagTest
*/
// Use -parameters flag to javac to have access flag information about
// parameters preserved in the resulting class file.
import java.lang.annotation.*;
import java.lang.reflect.*;
/*
* Method modifiers include:
* public, private, protected, static, final, synchronized,
* bridge, varargs, native, abstract, strictfp, synthetic,
*
* At a source level, constructors can have modifiers public,
* protected, or private.
*
* The modifiers bridge and synthetic cannot be applied directly and
* strictfp can only be applied in older source versions.
*
* Method parameters can be final, synthetic, and mandated.
*/
public abstract class MethodAccessFlagTest {
@ExpectedMethodFlags("[PUBLIC, STATIC, VARARGS]")
public static void main(String... args) {
for (var ctor :
MethodAccessFlagTest.class.getDeclaredConstructors()) {
checkExecutable(ctor);
}
for (var method :
MethodAccessFlagTest.class.getDeclaredMethods()) {
checkExecutable(method);
}
// Hard-code information about parameter modifiers; could be
// represented as annotations on the class and decoded.
for (var ctor : NestedClass.class.getConstructors()) {
for (var parameter : ctor.getParameters()) {
String expected = null;
if (parameter.getType() == int.class) {
// The explicit int parameter is expected to have
// the final flag
expected = "[FINAL]";
} else {
// The implicit this$0 parameter is expected to have the
// final and mandated flags
expected = "[FINAL, MANDATED]";
}
checkString(parameter.toString(),
parameter.accessFlags().toString(),
expected);
}
}
for (var method : BridgeExample.class.getDeclaredMethods()) {
// Find the two "clone" methods, one implicit and one
// explicit
if (!method.getName().equals("clone")) {
throw new RuntimeException("Unexpected name for " + method);
}
String expected = null;
if (method.getReturnType() == Object.class) {
expected = "[PUBLIC, BRIDGE, SYNTHETIC]";
} else {
expected = "[PUBLIC]";
}
checkString(method.toString(),
method.accessFlags().toString(),
expected);
}
// Hard-code information about parameter modifiers; could be
// represented as annotations on the class and decoded.
for (var ctor : TestEnum.class.getDeclaredConstructors()) {
// Each of the two parameters used in javac's enum
// constructor implementation is synthetic. This may need
// to be updated if javac's enum constructor generation
// idiom changes.
for (var parameter : ctor.getParameters()) {
checkString(parameter.toString(),
parameter.accessFlags().toString(),
"[SYNTHETIC]");
}
}
}
class NestedClass {
private int i;
// Implicit leading parameter
public NestedClass(final int i) {
this.i = i;
}
}
class BridgeExample implements Cloneable {
public BridgeExample(){}
// Triggers generation of a bridge method.
public BridgeExample clone() {
return new BridgeExample();
}
}
// Use as a host for a constructor with synthetic parameters
enum TestEnum {
INSTANCE;
}
private static void checkExecutable(Executable method) {
ExpectedMethodFlags emf =
method.getAnnotation(ExpectedMethodFlags.class);
if (emf != null) {
String actual = method.accessFlags().toString();
checkString(method.toString(), emf.value(), actual);
}
}
private static void checkString(String declaration,
String expected,
String actual) {
if (!expected.equals(actual)) {
throw new RuntimeException("On " + declaration +
" expected " + expected +
" got " + actual);
}
}
// Constructors
@ExpectedMethodFlags("[PUBLIC]")
public MethodAccessFlagTest() {}
@ExpectedMethodFlags("[PROTECTED]")
protected MethodAccessFlagTest(int i) {super();}
@ExpectedMethodFlags("[PRIVATE]")
private MethodAccessFlagTest(String s) {super();}
// Methods
@ExpectedMethodFlags("[PROTECTED, SYNCHRONIZED]")
protected synchronized void m0() {}
@ExpectedMethodFlags("[PRIVATE]")
private void m1() {}
@ExpectedMethodFlags("[ABSTRACT]")
abstract void m2();
@ExpectedMethodFlags("[PUBLIC, FINAL]")
public final void m3() {}
@ExpectedMethodFlags("[NATIVE]")
native void m4();
@Retention(RetentionPolicy.RUNTIME)
private @interface ExpectedMethodFlags {
String value();
}
}
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