Java example source code file (invoker.cpp)

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Java - Java tags/keywords

corbindtoruntimehost, couninitialize, failed, format_message_allocate_buffer, formatmessage, hresult, icorruntimehost-, java_invoker_invokeclr, jnicall, lptstr, lpvoid, makelangid, null, wchar

The invoker.cpp Java example source code

/*
 * Copyright (c) 2006, 2011, 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.
 */


#define _WIN32_WINNT 0x0400
#include "windows.h"
#include "Oleauto.h"
#include "stdio.h"
#include "mscoree.h"
#include "corerror.h"
#include "jni.h"
#include "invokerExp.h"
#include "invoker.h"

#import  <mscorlib.tlb> raw_interfaces_only

using namespace mscorlib;

// The CLR assembly invocation function

int __stdcall invokeCLR( WCHAR* wszApplication){

    //Initializes the COM library

    CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);

    ICorRuntimeHost* pHost           = NULL;
    IUnknown*        pAppDomainThunk = NULL;
    _AppDomain*      pAppDomain      = NULL;
    long             lReturn         = 0;

    // Load CLR into the process

    HRESULT hr = CorBindToRuntimeEx(NULL,NULL,0,CLSID_CorRuntimeHost,IID_ICorRuntimeHost,(VOID**)&pHost);

    if(!FAILED(hr)) {

        // Start the CLR

        hr = pHost->Start();
        if(!FAILED(hr)) {

            // Get the _AppDomain interface

            hr = pHost->GetDefaultDomain(&pAppDomainThunk);
            if(!FAILED(hr)) {

                hr = pAppDomainThunk->QueryInterface(__uuidof(_AppDomain), (void**)&pAppDomain);
                if(!FAILED(hr)) {

                    // Execute assembly

                    hr = pAppDomain->ExecuteAssembly_2(_bstr_t(wszApplication), &lReturn);
                    if (FAILED(hr)) {

                        printf("_AppDomain::ExecuteAssembly_2 failed with hr=0x%x.\n", hr);
                        lReturn = -1;
                    }

                }else{
                    printf("Can't get System::_AppDomain interface\n");
                    lReturn = -2;
                }

            }else{
                printf("ICorRuntimeHost->GetDefaultDomain failed with hr=0x%x.\n", hr);
                lReturn = -3;
            }
        }else{
            printf("ICorRuntimeHost->Start failed with hr=0x%x.\n", hr);
            lReturn = -4;
        }

    }else{
        printf("CorBindToRuntimeHost failed with hr=0x%x.\n", hr);
        lReturn = -5;
    }

    // print the error message description if needed

    if(FAILED(hr)){
        LPVOID lpMsgBuf = NULL;

        FormatMessage(
                FORMAT_MESSAGE_ALLOCATE_BUFFER |
                FORMAT_MESSAGE_FROM_SYSTEM |
                FORMAT_MESSAGE_IGNORE_INSERTS,
                NULL,
                hr,
                MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                (LPTSTR) &lpMsgBuf,
                0,
                NULL );
        if(lpMsgBuf != NULL)
            printf("Message:%s\n",lpMsgBuf);
        else
            printf("No translation of 0x%x\n",hr);
    }

    // close COM library

    CoUninitialize();

    return lReturn;
}

// Wrapper function that allows to ASCIZ string to provide the assemble path

int __stdcall invokeCLR( const char* szApplication){

    int    nLength = strlen(szApplication)+1;

    WCHAR* wszApplication = new WCHAR[nLength];

    mbstowcs(wszApplication, szApplication, nLength);

    int nReturn = invokeCLR( wszApplication);

    delete wszApplication;

    return nReturn;
}

// native method enter-point

JNIEXPORT jint JNICALL Java_invoker_invokeCLR( JNIEnv* pEnv,
                                               jclass  pClass,
                                               jstring jsApplication) {

    const char* szApplication = pEnv->GetStringUTFChars(jsApplication, NULL);

    int nResult = invokeCLR( szApplication);

    pEnv->ReleaseStringUTFChars(jsApplication,szApplication);

    return nResult;
}