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/* @test
* @bug 8081800 8165827
* @summary Add JNI invocation tests for private interface methods
* @run main/native PrivateInterfaceMethods
*/
public class PrivateInterfaceMethods {
static {
System.loadLibrary("PrivateInterfaceMethods");
}
static native int callIntVoid(Object target, String definingClassName, String methodName, boolean virtual);
static native void lookupIntVoid(String definingClassName, String methodName);
static interface A {
static final int AmResult = 1;
private int m() { return AmResult; }
private int onlyA() { return 0; }
}
static interface B extends A {
// No m() here
private int onlyB() { return 0; }
}
static interface C extends B {
static final int CmResult = 2;
private int m() { return CmResult; } // unrelated to A.m
private int onlyC() { return 0; }
}
public static class Impl implements C {
static final int ImplmResult = 3;
private int m() { return ImplmResult; } // unrelated to A.m or C.m
}
// We found that itable/vtable construction was affected by whether or not the
// implementation class declared a method with the same signature as the
// private interface method, so we test both variants.
public static class Impl2 implements C {
}
public static void main(String[] args) {
// JNI getMethodID only works for methods declared in or inherited by a type.
// Private interface methods are not inherited and so should only be found
// in the declaring interface.
lookup(A.class.getName(), "onlyA", null); // should succeed
lookup(B.class.getName(), "onlyA", NoSuchMethodError.class); // should fail
lookup(C.class.getName(), "onlyA", NoSuchMethodError.class); // should fail
lookup(Impl.class.getName(), "onlyA", NoSuchMethodError.class); // should fail
lookup(Impl2.class.getName(), "onlyA", NoSuchMethodError.class); // should fail
lookup(B.class.getName(), "onlyB", null); // should succeed
lookup(A.class.getName(), "onlyB", NoSuchMethodError.class); // should fail
lookup(C.class.getName(), "onlyB", NoSuchMethodError.class); // should fail
lookup(Impl.class.getName(), "onlyB", NoSuchMethodError.class); // should fail
lookup(Impl2.class.getName(), "onlyB", NoSuchMethodError.class); // should fail
lookup(C.class.getName(), "onlyC", null); // should succeed
lookup(A.class.getName(), "onlyC", NoSuchMethodError.class); // should fail
lookup(B.class.getName(), "onlyC", NoSuchMethodError.class); // should fail
lookup(Impl.class.getName(), "onlyC", NoSuchMethodError.class); // should fail
lookup(Impl2.class.getName(), "onlyC", NoSuchMethodError.class); // should fail
Impl impl = new Impl();
// Note: JNI doesn't enforce access control so we can make
// private calls not possible in Java code.
// Also it doesn't check that the receiver is a type that
// defines the method!
// test: ((A)impl).m() - should succeed
test(impl, A.class.getName(), "m", A.AmResult, true, null);
test(impl, A.class.getName(), "m", A.AmResult, false, null);
// test: ((B)impl).m() - should fail: NoSuchMethodError
test(impl, B.class.getName(), "m", -1, true, NoSuchMethodError.class);
test(impl, B.class.getName(), "m", -1, false, NoSuchMethodError.class);
// test: ((C)impl).m() - should succeed
test(impl, C.class.getName(), "m", C.CmResult, true, null);
test(impl, C.class.getName(), "m", C.CmResult, false, null);
// test: impl.m() - should succeed
test(impl, Impl.class.getName(), "m", Impl.ImplmResult, true, null);
test(impl, Impl.class.getName(), "m", Impl.ImplmResult, false, null);
// ---
Impl2 impl2 = new Impl2();
// test: ((A)impl2).m() - should succeed
test(impl2, A.class.getName(), "m", A.AmResult, true, null);
test(impl2, A.class.getName(), "m", A.AmResult, false, null);
// test: ((B)impl2).m() - should fail: NoSuchMethodError
test(impl2, B.class.getName(), "m", -1, true, NoSuchMethodError.class);
test(impl2, B.class.getName(), "m", -1, false, NoSuchMethodError.class);
// test: ((C)impl2).m() - should succeed
test(impl2, C.class.getName(), "m", C.CmResult, true, null);
test(impl2, C.class.getName(), "m", C.CmResult, false, null);
// test: impl2.m() - should fail: NoSuchMethodError
test(impl2, Impl2.class.getName(), "m", -1, true, NoSuchMethodError.class);
test(impl2, Impl2.class.getName(), "m", -1, false, NoSuchMethodError.class);
}
static void lookup(String definingClass, String method, Class<?> expectedException) {
String desc = "Lookup of " + definingClass + "." + method;
try {
lookupIntVoid(definingClass, method);
if (expectedException != null)
throw new Error(desc + " succeeded - but expected exception "
+ expectedException.getSimpleName());
System.out.println(desc + " - passed");
}
catch (Throwable t) {
if (t.getClass() != expectedException)
throw new Error(desc + " failed: got exception " + t + " but expected exception "
+ expectedException.getSimpleName());
else
System.out.println(desc + " threw " + expectedException.getSimpleName() + " as expected");
}
}
static void test(Object target, String definingClass, String method,
int expected, boolean virtual, Class<?> expectedException) {
String desc = (virtual ? "Virtual" : "Nonvirtual") + " Invocation of " +
definingClass + "." + method + " on instance of class " +
target.getClass().getName();
try {
int res = callIntVoid(target, definingClass, method, virtual);
if (expectedException != null)
throw new Error(desc + " succeeded - but expected exception "
+ expectedException.getSimpleName());
if (res != expected)
throw new Error(desc + " got wrong result: " + res + " instead of " + expected);
System.out.println(desc + " - passed");
}
catch (Throwable t) {
if (t.getClass() != expectedException)
throw new Error(desc + " failed: got exception " + t + " but expected exception "
+ expectedException.getSimpleName());
else
System.out.println(desc + " threw " + expectedException.getSimpleName() + " as expected");
}
}
}