/*
* Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
#include <memory.h>
#include <stdlib.h>
#include "jinvokerExp.h"
static int g_nExitCode = 0;
void system_exit(jint nCode){
g_nExitCode = nCode;
}
/*
Allocating and providing the JVM init argumets.
By MakeJavaVMInitArgs() it is provided two options: providing CLASSPATH
environment variable value and function java.lang.System.exit()
redefinition in order to get the exit code.
See the description of the JNI API in
http://jre.sfbay/java/re/jdk/6/promoted/latest/docs/technotes/guides/jni/spec/invocation.html#wp9502
*/
int MakeJavaVMInitArgs( void** ppArgs ){
int nOptSize = 2;
JavaVMInitArgs* pArgs = new JavaVMInitArgs();
JavaVMOption* pOptions = new JavaVMOption[nOptSize];
//provide CLASSPATH value to java.class.path
char* szClassPath = getenv("CLASSPATH");
if( szClassPath == NULL )
szClassPath = ".";
pOptions[0].optionString = new char[strlen("-Djava.class.path=")+
strlen(szClassPath)+1];
sprintf( pOptions[0].optionString, "-Djava.class.path=%s", szClassPath );
//redefine java.lang.System.exit()
pOptions[1].optionString = "exit";
pOptions[1].extraInfo = system_exit;
//Fill the arguments
memset(pArgs, 0, sizeof(JavaVMInitArgs));
pArgs->version = 0x00010002;
pArgs->options = pOptions;
pArgs->nOptions = nOptSize;
pArgs->ignoreUnrecognized = JNI_TRUE;
*ppArgs = pArgs;
return 0;
}
/*
Free the allocated JVM init argumets
*/
void FreeJavaVMInitArgs( void* pArgs ){
delete ((JavaVMInitArgs*)pArgs)->options[0].optionString;
delete ((JavaVMInitArgs*)pArgs)->options;
delete pArgs;
}
/*
Static wrapper on FindClass() JNI function.
See the description in
http://jre.sfbay/java/re/jdk/6/promoted/latest/docs/technotes/guides/jni/spec/functions.html#wp16027
*/
int FindClass( JNIEnv* pEnv,
const char* szClass,
jclass* pClass ){
*pClass = pEnv->FindClass( szClass );
if(pEnv->ExceptionCheck() == JNI_TRUE){
pEnv->ExceptionDescribe();
return -1;
}
if(*pClass != NULL)
return 0;
else
return -2;
}
/*
Static wrapper on GetStaticMethodID() JNI function.
See the description in
http://jre.sfbay/java/re/jdk/6/promoted/latest/docs/technotes/guides/jni/spec/functions.html#wp20949
*/
int GetStaticMethodID(JNIEnv* pEnv,
jclass pClass,
const char* szName,
const char* szArgs,
jmethodID* pMid){
*pMid = pEnv->GetStaticMethodID( pClass, szName, szArgs);
if(pEnv->ExceptionCheck() == JNI_TRUE){
pEnv->ExceptionDescribe();
return -1;
}
if( *pMid != NULL )
return 0;
else
return -2;
}
/*
Static wrapper on NewObjectArray() JNI function.
See the description in
http://jre.sfbay/java/re/jdk/6/promoted/latest/docs/technotes/guides/jni/spec/functions.html#wp21619
*/
int NewObjectArray( JNIEnv* pEnv,
int nDimension,
const char* szType,
jobjectArray* pArray ){
*pArray = pEnv->NewObjectArray( nDimension, pEnv->FindClass( szType ), NULL);
if(pEnv->ExceptionCheck() == JNI_TRUE){
pEnv->ExceptionDescribe();
return -1;
}
if( pArray != NULL )
return 0;
else
return -2;
}
/*
Static wrapper on CallStaticVoidMethod() JNI function.
See the description in
http://jre.sfbay/java/re/jdk/6/promoted/latest/docs/technotes/guides/jni/spec/functions.html#wp4796
*/
int CallStaticVoidMethod( JNIEnv* pEnv,
jclass pClass,
jmethodID pMid,
void* pArgs){
g_nExitCode = 0;
pEnv->CallStaticVoidMethod( pClass, pMid, pArgs);
if( pEnv->ExceptionCheck() == JNI_TRUE ){
pEnv->ExceptionDescribe();
return -1;
}else
return g_nExitCode;
}
/*
Static wrapper on DestroyJavaVM() JNI function.
See the description in
http://jre.sfbay/java/re/jdk/6/promoted/latest/docs/technotes/guides/jni/spec/invocation.html#destroy_java_vm
*/
int DestroyJavaVM( JavaVM* pJVM ){
pJVM->DestroyJavaVM();
return 0;
}