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/*
* Copyright (c) 2020, 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.
*/
package p1;
import p1.internal.*;
import static java.lang.invoke.MethodHandles.Lookup.*;
import java.lang.invoke.MethodHandles;
/*
* Test::test is invoked by Main class
*/
public class Test {
public static void test() throws Exception {
clinitInvokeEnsureClassInitialized();
testModuleAccess();
testPackageAccess();
testFullPrivilegeAccess();
}
/*
* A::<clinit> calls Lookup::ensureClassInitialized(A.class)
*/
public static void clinitInvokeEnsureClassInitialized() throws Exception {
assertFalse(Helper.isInitialized(A.class));
// same package and public type
MethodHandles.lookup().ensureInitialized(A.class);
assertTrue(Helper.isInitialized(A.class));
}
/*
* Test Lookup with MODULE access to initialize class in this module
* and another module it reads.
*/
public static void testModuleAccess() throws Exception {
MethodHandles.Lookup lookup = MethodHandles.lookup().dropLookupMode(PACKAGE);
assertTrue((lookup.lookupModes() & PACKAGE) == 0);
assertFalse(Helper.isInitialized(p2.T.class));
// exported by another module
lookup.ensureInitialized(p2.T.class);
assertTrue(Helper.isInitialized(p2.T.class));
// non-exported type in another module
Class<?> x = Class.forName(p2.T.class.getModule(), "p2.internal.X");
assertFalse(Helper.isInitialized(x));
try {
lookup.ensureInitialized(x);
throw new AssertionError(lookup + " should not have access to " + x);
} catch (IllegalAccessException e) {}
// no access to package-private class in the same module
try {
lookup.ensureInitialized(E.class);
throw new AssertionError(lookup + " should not have access to " + E.class);
} catch (IllegalAccessException e) {}
}
/*
* Test Lookup with PACKAGE access
*/
public static void testPackageAccess() throws Exception {
MethodHandles.Lookup lookup = MethodHandles.lookup().dropLookupMode(PRIVATE);
assertTrue((lookup.lookupModes() & PRIVATE) == 0);
// verify these classes are not initialized
assertFalse(Helper.isInitialized(B.class));
assertFalse(Helper.isInitialized(C.class));
assertFalse(Helper.isInitialized(E.class));
// same package but package-private
lookup.ensureInitialized(B.class);
assertTrue(Helper.isInitialized(B.class));
// different package and public type
lookup.ensureInitialized(C.class);
assertTrue(Helper.isInitialized(C.class));
// different package and non-public types
Class<?> d = Class.forName(Test.class.getModule(), "p1.internal.D");
assertFalse(Helper.isInitialized(d));
try {
lookup.ensureInitialized(d);
throw new AssertionError(lookup + " should not have access to " + d);
} catch (IllegalAccessException e) {}
}
/*
* Test Lookup with full privilege access
*/
public static void testFullPrivilegeAccess() throws Exception {
MethodHandles.Lookup lookup = MethodHandles.lookup();
// these classes have been initialized
assertTrue(Helper.isInitialized(A.class)); // same package and public type
assertTrue(Helper.isInitialized(B.class)); // same package but package-private
assertTrue(Helper.isInitialized(C.class)); // different package and public type
// verify access to these classes
lookup.ensureInitialized(A.class);
lookup.ensureInitialized(B.class);
lookup.ensureInitialized(C.class);
// different package and non-public types
Class<?> d = Class.forName(Test.class.getModule(), "p1.internal.D");
try {
assertFalse(Helper.isInitialized(d));
lookup.ensureInitialized(d);
throw new AssertionError(lookup + " should not have access to " + d);
} catch (IllegalAccessException e) {}
// nestmate and same package
assertFalse(Helper.isInitialized(E.class));
assertTrue(Test.class.isNestmateOf(E.class));
lookup.ensureInitialized(E.class);
}
public static void assertTrue(boolean v) {
if (!v) {
throw new AssertionError("unexpected result");
}
}
public static void assertFalse(boolean v) {
if (v) {
throw new AssertionError("unexpected result");
}
}
// nestmate
static class E {
}
}
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