| /* |
| * Copyright (c) 2001, 2003, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| */ |
| |
| #include "jni.h" |
| #include "jvm.h" |
| |
| #include "java_io_ObjectStreamClass.h" |
| |
| static jclass noSuchMethodErrCl; |
| |
| /* |
| * Class: java_io_ObjectStreamClass |
| * Method: initNative |
| * Signature: ()V |
| * |
| * Native code initialization hook. |
| */ |
| JNIEXPORT void JNICALL |
| Java_java_io_ObjectStreamClass_initNative(JNIEnv *env, jclass this) |
| { |
| jclass cl = (*env)->FindClass(env, "java/lang/NoSuchMethodError"); |
| if (cl == NULL) { /* exception thrown */ |
| return; |
| } |
| noSuchMethodErrCl = (*env)->NewGlobalRef(env, cl); |
| } |
| |
| /* |
| * Class: java_io_ObjectStreamClass |
| * Method: hasStaticInitializer |
| * Signature: (Ljava/lang/Class;)Z |
| * |
| * Returns true if the given class defines a <clinit>()V method; returns false |
| * otherwise. |
| */ |
| JNIEXPORT jboolean JNICALL |
| Java_java_io_ObjectStreamClass_hasStaticInitializer(JNIEnv *env, jclass this, |
| jclass clazz) |
| { |
| jclass superCl = NULL; |
| jmethodID superClinitId = NULL; |
| jmethodID clinitId = |
| (*env)->GetStaticMethodID(env, clazz, "<clinit>", "()V"); |
| if (clinitId == NULL) { /* error thrown */ |
| jthrowable th = (*env)->ExceptionOccurred(env); |
| (*env)->ExceptionClear(env); /* normal return */ |
| if (!(*env)->IsInstanceOf(env, th, noSuchMethodErrCl)) { |
| (*env)->Throw(env, th); |
| } |
| return JNI_FALSE; |
| } |
| |
| /* |
| * Check superclass for static initializer as well--if the same method ID |
| * is returned, then the static initializer is from a superclass. |
| * Empirically, this step appears to be unnecessary in 1.4; however, the |
| * JNI spec makes no guarantee that GetStaticMethodID will not return the |
| * ID for a superclass initializer. |
| */ |
| |
| if ((superCl = (*env)->GetSuperclass(env, clazz)) == NULL) { |
| return JNI_TRUE; |
| } |
| superClinitId = |
| (*env)->GetStaticMethodID(env, superCl, "<clinit>", "()V"); |
| if (superClinitId == NULL) { /* error thrown */ |
| jthrowable th = (*env)->ExceptionOccurred(env); |
| (*env)->ExceptionClear(env); /* normal return */ |
| if (!(*env)->IsInstanceOf(env, th, noSuchMethodErrCl)) { |
| (*env)->Throw(env, th); |
| } |
| return JNI_TRUE; |
| } |
| |
| return (clinitId != superClinitId); |
| } |