1 /*

     2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 #include <jni.h>

    25 

    26 // Private interface methods call test

    27 JNIEXPORT jint JNICALL

    28 Java_PrivateInterfaceMethods_callIntVoid(JNIEnv *env, jclass unused, jobject impl, jstring defining_class_name,

    29                                          jstring method_name, jboolean virtual) {

    30 

    31     // Lookup int method_name() in defining_class_name, and if it exists call impl.method_name()

    32     // using a virtual or non-virtual invocation as indicated

    33 

    34     jmethodID m_id = NULL;

    35     jclass clazz = NULL;

    36     const char* name = NULL;

    37 

    38     name = (*env)->GetStringUTFChars(env, defining_class_name, NULL);

    39     if (name == NULL) return -1;

    40     clazz = (*env)->FindClass(env, name);

    41     (*env)->ReleaseStringUTFChars(env, defining_class_name, name);

    42     if ((*env)->ExceptionCheck(env)) return -1;

    43 

    44     name = (*env)->GetStringUTFChars(env, method_name, NULL);

    45     if (name == NULL) return -1;

    46     m_id = (*env)->GetMethodID(env, clazz, name, "()I");

    47     (*env)->ReleaseStringUTFChars(env, method_name, name);

    48     if ((*env)->ExceptionCheck(env)) return -1;

    49 

    50     if (!virtual)

    51         return (*env)->CallNonvirtualIntMethod(env, impl, clazz, m_id);

    52     else

    53         return (*env)->CallIntMethod(env, impl, m_id);

    54 }