/*
* Copyright (c) 2015, 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 java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodHandles.Lookup;
import java.lang.invoke.MethodType;
/**
* Basic test case for module access check, supplements AccessControlTest.
*
* The tests consists of two modules:
*
* module m1 { requires m2; exports p1; }
* module m2 { exports q1; }
*
* Both modules read java.base (as every module reads java.base)
*
* module m1 has public types in packages p1 and p2, p2 is not exported.
* module m2 has public types in packages q1 and q2, q2 is not exported.
*/
public class Main {
static final int MODULE = Lookup.MODULE;
// Use Class.forName to get classes for test because some
// are not accessible at compile-time
static final Class<?> p1_Type1; // m1, exported
static final Class<?> p2_Type2; // m1, not exported
static final Class<?> q1_Type1; // m2, exported, m1 reads m2
static final Class<?> q2_Type2; // m2, not exported, m1 reads m2
static final Class<?> x500NameClass; // java.base, not exported
static {
try {
p1_Type1 = Class.forName("p1.Type1");
p2_Type2 = Class.forName("p2.Type2");
q1_Type1 = Class.forName("q1.Type1");
q2_Type2 = Class.forName("q2.Type2");
x500NameClass = Class.forName("sun.security.x509.X500Name");
} catch (ClassNotFoundException e) {
throw new AssertionError(e);
}
}
public static void main(String[] args) throws Exception {
Lookup lookup, lookup2;
/**
* MethodHandles.lookup()
* has module access [A0]
* can access all public types in m1 [A1]
* can access public types in packages exported by modules that m1 reads [A2]
* cannot access public types in non-exported modules of modules that m1 reads [A3]
*/
lookup = MethodHandles.lookup();
assertTrue((lookup.lookupModes() & MODULE) == MODULE); // [A0]
findConstructor(lookup, p1_Type1, void.class); // [A1]
findConstructor(lookup, p2_Type2, void.class); // [A1]
findConstructor(lookup, q1_Type1, void.class); // [A2]
findConstructorExpectingIAE(lookup, q2_Type2, void.class); // [A3]
findConstructor(lookup, Object.class, void.class); // [A2]
findConstructorExpectingIAE(lookup, x500NameClass, void.class, String.class); // [A3]
/**
* Teleport from MethodHandles.lookup() to lookup class in the same module
* module access is retained [A0]
* can access all public types in m1 [A1]
* can access public types in packages exported by modules that m1 reads [A2]
* cannot access public types in non-exported modules of modules that m1 reads [A3]
*/
lookup2 = lookup.in(p2_Type2);
assertTrue((lookup2.lookupModes() & MODULE) == MODULE); // [A0]
findConstructor(lookup2, p1_Type1, void.class); // [A1]
findConstructor(lookup2, p2_Type2, void.class); // [A1]
findConstructor(lookup2, q1_Type1, void.class); // [A2]
findConstructorExpectingIAE(lookup2, q2_Type2, void.class); // [A3]
findConstructor(lookup2, Object.class, void.class); // [A2]
findConstructorExpectingIAE(lookup2, x500NameClass, void.class, String.class); // [A3]
/**
* Teleport from MethodHandles.lookup() to lookup class in another named module
* has no access [A0]
*/
lookup2 = lookup.in(Object.class);
assertTrue(lookup2.lookupModes() == 0); // [A0]
findConstructorExpectingIAE(lookup2, Object.class, void.class); // [A0]
/**
* Teleport from MethodHandles.lookup() to lookup class in an unnamed module
* has no access [A0]
*/
Class<?> c = MethodHandles.publicLookup().lookupClass();
assertTrue(!c.getModule().isNamed());
lookup2 = lookup.in(c);
assertTrue(lookup2.lookupModes() == 0); // [A0]
findConstructorExpectingIAE(lookup2, Object.class, void.class);
/**
* MethodHandles.publicLookup()
* has no module access [A0]
* can access public types in exported packages [A1]
* cannot access public types in non-exported packages [A2]
*/
lookup = MethodHandles.publicLookup();
assertTrue((lookup.lookupModes() & MODULE) == 0); // [A0]
findConstructor(lookup, p1_Type1, void.class); // [A1]
findConstructorExpectingIAE(lookup, p2_Type2, void.class); // [A1]
findConstructor(lookup, q1_Type1, void.class); // [A1]
findConstructorExpectingIAE(lookup, q2_Type2, void.class); // [A2]
findConstructor(lookup, Object.class, void.class); // [A1]
findConstructorExpectingIAE(lookup, x500NameClass, void.class); // [A2]
/**
* Teleport from MethodHandles.publicLookup() to lookup class in java.base
* has no module access [A0]
* can access public types in packages exported by java.base [A1]
* cannot access public types in non-exported packages [A2]
* no access to types in other named modules [A3]
*/
lookup2 = lookup.in(Object.class);
assertTrue((lookup2.lookupModes() & MODULE) == 0); // [A0]
findConstructor(lookup2, String.class, void.class); // [A1]
findConstructorExpectingIAE(lookup2, x500NameClass, void.class, String.class); // [A2]
findConstructorExpectingIAE(lookup2, p1_Type1, void.class); // [A3]
findConstructorExpectingIAE(lookup2, q1_Type1, void.class); // [A3]
/**
* Teleport from MethodHandles.publicLookup() to lookup class in m1
* has no module access [A0]
* can access public types in packages exported by m1, m2 and java.base [A1]
* cannot access public types is non-exported packages [A2]
*/
lookup2 = lookup.in(p1_Type1);
assertTrue((lookup2.lookupModes() & MODULE) == 0); // [A0]
findConstructor(lookup2, p1_Type1, void.class); // [A1]
findConstructor(lookup2, q1_Type1, void.class); // [A1]
findConstructor(lookup2, Object.class, void.class); // [A1]
findConstructorExpectingIAE(lookup, p2_Type2, void.class); // [A2]
findConstructorExpectingIAE(lookup, q2_Type2, void.class); // [A2]
findConstructorExpectingIAE(lookup2, x500NameClass, void.class, String.class); // [A2]
/**
* Teleport from MethodHandles.publicLookup() to lookup class in m2
* has no module access [A0]
* can access public types in packages exported by m2 and java.base [A1]
* cannot access public types is non-exported packages or modules that m2 does
* not read [A2]
*/
lookup2 = lookup.in(q1_Type1);
assertTrue((lookup2.lookupModes() & MODULE) == 0); // [A0]
findConstructor(lookup2, q1_Type1, void.class); // [A1]
findConstructor(lookup2, Object.class, void.class); // [A1]
findConstructorExpectingIAE(lookup2, p1_Type1, void.class); // [A2]
findConstructorExpectingIAE(lookup, q2_Type2, void.class); // [A2]
findConstructorExpectingIAE(lookup2, x500NameClass, void.class, String.class); // [A2]
/**
* Teleport from MethodHandles.publicLookup() to lookup class that is not
* in an exported package, should get no access [A0]
*/
lookup2 = lookup.in(p2_Type2);
assertTrue(lookup2.lookupModes() == 0); // [A0]
findConstructorExpectingIAE(lookup, q2_Type2, void.class); // [A0]
}
/**
* Invokes Lookup findConstructor with a method type constructored from the
* given return and parameter types, expecting IllegalAccessException to be
* thrown.
*/
static MethodHandle findConstructorExpectingIAE(Lookup lookup,
Class<?> clazz,
Class<?> rtype,
Class<?>... ptypes) throws Exception {
try {
findConstructor(lookup, clazz, rtype, ptypes);
throw new RuntimeException("IllegalAccessError expected");
} catch (IllegalAccessException expected) {
return null;
}
}
/**
* Invokes Lookup findConstructor with a method type constructored from the
* given return and parameter types.
*/
static MethodHandle findConstructor(Lookup lookup,
Class<?> clazz,
Class<?> rtype,
Class<?>... ptypes) throws Exception {
MethodType mt = MethodType.methodType(rtype, ptypes);
return lookup.findConstructor(clazz, mt);
}
static void assertTrue(boolean condition) {
if (!condition)
throw new RuntimeException();
}
}