132 lines
3.9 KiB
C++
132 lines
3.9 KiB
C++
/*
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* Copyright (c) 1999-2004 Sourceforge JACOB Project.
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* All rights reserved. Originator: Dan Adler (http://danadler.com).
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* Get more information about JACOB at http://sourceforge.net/projects/jacob-project
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "stdafx.h"
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#include <objbase.h>
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#include "Dispatch.h"
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// Win32 support for Ole Automation
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#include <wchar.h>
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#include <string.h>
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#include <atlbase.h>
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#include <oleauto.h>
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#include <olectl.h>
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#include "util.h"
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/**
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* An implementation of IEnumVariant based on code submitted by
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* Thomas Hallgren (mailto:Thomas.Hallgren@eoncompany.com)
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*/
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extern "C"
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{
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// extract a IDispatch from a jobject
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IEnumVARIANT* extractEnumVariant(JNIEnv* env, jobject arg)
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{
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jfieldID FID_pIEnumVARIANT = 0;
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jclass clazz = env->GetObjectClass(arg);
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FID_pIEnumVARIANT = env->GetFieldID(clazz, "m_pIEnumVARIANT", "I");
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return (IEnumVARIANT*)env->GetIntField(arg, FID_pIEnumVARIANT);
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}
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JNIEXPORT jint JNICALL
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Java_com_jacob_com_EnumVariant_Next(JNIEnv* env, jobject _this, jobjectArray vars)
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{
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IEnumVARIANT* self = extractEnumVariant(env, _this);
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//printf("self=%x\n", self);
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if(self == NULL)
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return 0;
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ULONG count = (ULONG)env->GetArrayLength(vars);
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if(count == 0)
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return 0;
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VARIANT* sink = (VARIANT*)CoTaskMemAlloc(count * sizeof(VARIANT));
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ULONG fetchCount = 0;
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HRESULT hr = self->Next(count, sink, &fetchCount);
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if(FAILED(hr))
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{
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CoTaskMemFree(sink);
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ThrowComFail(env, "IEnumVARIANT::Next", hr);
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return 0;
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}
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// prepare a new return value array
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//
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jclass clazz = env->FindClass("com/jacob/com/Variant");
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jmethodID ctor = env->GetMethodID(clazz, "<init>", "()V");
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for(ULONG idx = 0; idx < fetchCount; ++idx)
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{
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// construct a variant to return
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//
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jobject newVariant = env->NewObject(clazz, ctor);
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VARIANT* v = extractVariant(env, newVariant);
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VariantCopy(v, sink + idx);
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env->SetObjectArrayElement(vars, idx, newVariant);
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env->DeleteLocalRef(newVariant);
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//Sourceforge-1674179 fix memory leak
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// Variants received while iterating IEnumVARIANT must be cleared when no longer needed
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// The variant has been copied so no longer needed
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VariantClear(sink);
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}
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CoTaskMemFree(sink);
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return (jint)fetchCount;
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}
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JNIEXPORT void JNICALL
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Java_com_jacob_com_EnumVariant_release(JNIEnv* env, jobject _this)
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{
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IEnumVARIANT* self = extractEnumVariant(env, _this);
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if(self != NULL)
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{
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self->Release();
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jfieldID FID_pIEnumVARIANT = 0;
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jclass clazz = env->GetObjectClass(_this);
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FID_pIEnumVARIANT = env->GetFieldID(clazz, "m_pIEnumVARIANT", "I");
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env->SetIntField(_this, FID_pIEnumVARIANT, (unsigned int)0);
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}
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}
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JNIEXPORT void JNICALL
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Java_com_jacob_com_EnumVariant_Reset(JNIEnv* env, jobject _this)
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{
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IEnumVARIANT* self = extractEnumVariant(env, _this);
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if(self == NULL)
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return;
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HRESULT hr = self->Reset();
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if(FAILED(hr))
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ThrowComFail(env, "IEnumVARIANT::Reset", hr);
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}
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JNIEXPORT void JNICALL
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Java_com_jacob_com_EnumVariant_Skip(JNIEnv* env, jobject _this, jint count)
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{
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IEnumVARIANT* self = extractEnumVariant(env, _this);
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if(self == NULL)
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return;
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HRESULT hr = self->Skip((ULONG)count);
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if(FAILED(hr))
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ThrowComFail(env, "IEnumVARIANT::Skip", hr);
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}
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}
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