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#include "stdafx.h"
#include "com4j.h"
#include "com4j_variant.h"
#include "xducer.h"
#include "unmarshaller.h"
#include "safearray.h"
#include "variant.h"
/**
* Original auther (C) Kohsuke Kawaguchi (kk@kohsuke.org)
* Modified by (C) Michael Schnell (scm, 2008, Michael-Schnell@gmx.de)
*/
JNIEXPORT void JNICALL Java_com4j_Variant_clear0(JNIEnv* env, jclass, jobject image) {
HRESULT hr = VariantClear((VARIANT*)env->GetDirectBufferAddress(image));
if(FAILED(hr))
error(env,__FILE__,__LINE__,hr,"failed to clear variant");
}
// change the variant type in the same place
void VariantChangeType( JNIEnv* env, VARIANT* v, VARTYPE type ) {
VARIANT dst;
VariantInit(&dst);
HRESULT hr = VariantChangeType(&dst,v,0, type );
if(FAILED(hr)) {
error(env,__FILE__,__LINE__,hr,"failed to change the variant type");
return;
}
VariantClear(v);
*v = dst;
}
JNIEXPORT void JNICALL Java_com4j_Variant_changeType0(JNIEnv* env, jclass, jint type, jobject image) {
VariantChangeType( env, (VARIANT*)env->GetDirectBufferAddress(image), (VARTYPE)type );
}
JNIEXPORT jobject JNICALL Java_com4j_Variant_convertTo(JNIEnv* env, jobject instance, jclass target) {
try {
VARIANT* v = com4jVariantToVARIANT(env,instance);
while(v->vt & VT_BYREF) // unpeel VT_BYREF to get to the nested VARIANT
v = reinterpret_cast<VARIANT*>(v->byref);
jobject r = variantToObject(env,target,*v);
if(r==reinterpret_cast<jobject>(-1)) {
jstring name = javaLangClass_getName(env,target);
error(env,__FILE__,__LINE__,E_FAIL,"Unable to convert VARIANT %d to the %s",
v->vt,
LPCSTR(JString(env,name)));
return NULL;
}
return r;
} catch( _com_error& e ) {
error(env,__FILE__,__LINE__,e.Error(),"%s",(LPCSTR)_bstr_t(e.ErrorMessage()));
return NULL;
}
}
JNIEXPORT void JNICALL Java_com4j_Variant_set0(JNIEnv * env, jobject, jobject value, jobject image) {
VARIANT *destVar = (VARIANT*)env->GetDirectBufferAddress(image);
VARIANT *newVar = convertToVariant(env, value);
VariantCopy(destVar, newVar);
}
JNIEXPORT jobject JNICALL Java_com4j_Variant_get0(JNIEnv *env, jobject, jobject image) {
VARIANT *var = (VARIANT*)env->GetDirectBufferAddress(image);
return variantToObject(env, NULL, *var);
}
class VariantHandler {
public:
// returnss VARIANT allocated by 'new'
virtual VARIANT* set( JNIEnv* env, jobject src ) = 0;
virtual jobject get( JNIEnv* env, VARIANT* v, jclass retType ) = 0;
};
template <VARTYPE vt, class XDUCER>
class VariantHandlerImpl : public VariantHandler {
protected:
inline typename XDUCER::NativeType& addr(VARIANT* v) {
return *reinterpret_cast<XDUCER::NativeType*>(&v->boolVal);
}
public:
VARIANT* set( JNIEnv* env, jobject o ) {
VARIANT* v = new VARIANT();
VariantInit(v);
v->vt = vt;
addr(v) = XDUCER::toNative(
env, static_cast<XDUCER::JavaType>(o) );
return v;
}
jobject get( JNIEnv* env, VARIANT* v, jclass retType ) {
_variant_t dst(v);
dst.ChangeType(vt);
jobject o = XDUCER::toJava(env, addr(&dst));
return o;
}
};
class ComObjectVariandHandlerImpl : public VariantHandlerImpl<VT_DISPATCH,xducer::Com4jObjectXducer> {
typedef VariantHandlerImpl<VT_DISPATCH,xducer::Com4jObjectXducer> BASE;
VARIANT* set( JNIEnv* env, jobject o) {
VARIANT* v = BASE::set(env,o);
IDispatch* pDisp = NULL;
HRESULT hr = addr(v)->QueryInterface(&pDisp);
if(SUCCEEDED(hr)) {
// if possible, use VT_DISPATCH.
addr(v)->Release();
addr(v) = pDisp;
v->vt = VT_DISPATCH;
} // otherwise use VT_UNKNOWN. See java.net issue 2.
return v;
}
jobject get( JNIEnv* env, VARIANT* v, jclass retType ) {
jobject o = BASE::get(env,v,retType);
if(o==NULL) return NULL;
// if the return type is an interface, use that to create a strongly typed object.
// otherwise just return it as Com4jObject
if(env->IsSameObject(retType,javaLangObject) || env->IsSameObject(retType,com4j_Com4jObject))
return o;
else {
jobject o2 = com4jWrapper_queryInterface(env,o,retType);
com4jWrapper_dispose0(env,o);
return o2;
}
}
};
class NoopVariantHandlerImpl : public VariantHandler {
public:
VARIANT* set( JNIEnv* env, jobject src ) {
VARIANT* pv = new VARIANT();
VariantInit(pv);
VariantCopy(pv, com4jVariantToVARIANT(env,src));
return pv;
}
jobject get( JNIEnv* env, VARIANT* v, jclass retType ) {
jobject r = com4j_Variant_new(env);
::VariantCopy(com4jVariantToVARIANT(env,r),v);
return r;
}
};
class ComEnumHandlerImpl : public VariantHandler {
public:
VARIANT* set( JNIEnv* env, jobject src ) {
VARIANT* pv = new VARIANT();
VariantInit(pv);
pv->vt = VT_I4;
pv->intVal = com4j_ComEnum_comEnumValue(env,src);
return pv;
}
jobject get( JNIEnv* env, VARIANT* v, jclass retType ) {
_variant_t dst(v);
dst.ChangeType(VT_I4);
return com4j_enumDictionary_get(env,retType,dst.intVal);
}
};
class DateHandlerImpl : public VariantHandler {
public:
VARIANT* set( JNIEnv* env, jobject src ) {
jdouble d = com4j_Variant_fromDate(env,src);
VARIANT* pv = new VARIANT();
VariantInit(pv);
pv->vt = VT_DATE;
pv->date = d;
return pv;
}
jobject get( JNIEnv* env, VARIANT* v, jclass retType ) {
_variant_t dst(v);
dst.ChangeType(VT_DATE);
return com4j_Variant_toDate(env,dst.date);
}
};
class DecimalHandlerImpl : public VariantHandler {
public:
VARIANT* set( JNIEnv* env, jobject src ) {
VARIANT* pv = new VARIANT();
VariantInit(pv);
pv->vt = VT_DECIMAL;
jstring s = javaMathBigDecimal_toString(env,src);
BSTR bs = SysAllocString(JString(env,s));
::VarDecFromStr( bs, LOCALE_USER_DEFAULT, 0, &(pv->decVal) );
SysFreeString(bs);
return pv;
}
jobject get( JNIEnv* env, VARIANT* v, jclass retType ) {
_variant_t dst(v);
dst.ChangeType(VT_DECIMAL);
BSTR bs;
::VarBstrFromDec(&dst.decVal, LOCALE_USER_DEFAULT, 0, &bs);
jobject r = javaMathBigDecimal_new_Str(env, env->NewString(bs, SysStringLen(bs)));
SysFreeString(bs);
return r;
}
};
class NullVariantHandlerImpl : public VariantHandler {
public:
VARIANT* set( JNIEnv* env, jobject src ) {
_ASSERT(FALSE);
return NULL;
}
jobject get( JNIEnv* env, VARIANT* v, jclass retType ) {
return NULL;
}
};
// conversion table for variant
// from Java->native, we look for the cls field that can accept the current object,
// then if they match, we'll call the handler.
// from native->Java, we look for the vt field that can accept the current variant type.
// then if they match, we'll call the handler
struct SetterEntry {
JClassID* cls;
VARTYPE vt;
VariantHandler* handler;
};
static SetterEntry setters[] = {
{ &javaLangBoolean, VT_BOOL, new VariantHandlerImpl<VT_BOOL, xducer::BoxedVariantBoolXducer>() },
{ &javaLangString, VT_BSTR, new VariantHandlerImpl<VT_BSTR, xducer::StringXducer>() },
{ &javaLangFloat, VT_R4, new VariantHandlerImpl<VT_R4, xducer::BoxedFloatXducer>() },
{ &javaLangDouble, VT_R8, new VariantHandlerImpl<VT_R8, xducer::BoxedDoubleXducer>() },
{ &javaLangByte, VT_I1, new VariantHandlerImpl<VT_I1, xducer::BoxedByteXducer>() },
{ &javaLangShort, VT_I2, new VariantHandlerImpl<VT_I2, xducer::BoxedShortXducer>() },
{ &javaLangInteger, VT_I4, new VariantHandlerImpl<VT_I4, xducer::BoxedIntXducer>() },
{ &javaLangLong, VT_I8, new VariantHandlerImpl<VT_I8, xducer::BoxedLongXducer>() },
{ &javaLangLong, VT_INT, new VariantHandlerImpl<VT_INT, xducer::BoxedIntXducer>() },
{ &javaUtilDate, VT_DATE, new DateHandlerImpl() },
{ &javaMathBigDecimal, VT_DECIMAL, new DecimalHandlerImpl() },
// see issue 2 on java.net. I used to convert a COM object to VT_UNKNOWN
{ &com4j_Com4jObject,VT_DISPATCH, new ComObjectVariandHandlerImpl() },
{ &com4j_Com4jObject,VT_UNKNOWN, new ComObjectVariandHandlerImpl() },
{ &com4j_Variant, -1, new NoopVariantHandlerImpl() }, // don't match from native->Java
{ &com4j_ComEnum, -1, new ComEnumHandlerImpl() }, // don't match from native->Java
// unsigned versions. when converting from Java, prefer signed versions
{ &javaLangShort, VT_UI1, new VariantHandlerImpl<VT_I2, xducer::BoxedShortXducer>() }, // use VT_I2 for VariantHandlerImpl since that's what BoxedShortXducer expect
{ &javaLangInteger, VT_UI2, new VariantHandlerImpl<VT_I4, xducer::BoxedIntXducer>() },
{ &javaLangLong, VT_UI4, new VariantHandlerImpl<VT_I8, xducer::BoxedLongXducer>() },
{ &javaMathBigInteger,VT_UI8, new VariantHandlerImpl<VT_UI8, xducer::BigIntegerXducer>() },
// TODO: Holder support
{ NULL, 0, NULL }
};
// returns a VARIANT allocated by 'new'
VARIANT* convertToVariant( JNIEnv* env, jobject o ) {
jclass cls = env->GetObjectClass(o);
// consdier a conversion for scalars
for( SetterEntry* p = setters; p->cls!=NULL; p++ ) {
if( env->IsAssignableFrom( cls, *(p->cls) ) ) {
VARIANT* v = p->handler->set(env,o);
return v;
}
}
// consider a conversion to SAFEARRAY
pair<SAFEARRAY*,VARTYPE> sa = safearray::SafeArrayXducer::toNative2(env,static_cast<jarray>(o));
if(sa.first!=NULL) {
VARIANT* v = new VARIANT();
VariantInit(v);
v->vt = VT_ARRAY|sa.second;
v->parray = sa.first;
return v;
}
return NULL;
}
jobject variantToObject( JNIEnv* env, jclass retType, VARIANT& v ) {
if(v.vt==VT_ERROR || v.vt==VT_EMPTY || v.vt==VT_NULL)
return NULL;
if(retType != NULL){
// return type driven
for( SetterEntry* p = setters; p->cls!=NULL; p++ ) {
if( env->IsAssignableFrom( retType, *(p->cls) ) ) {
return p->handler->get(env,&v,retType);
}
}
}
// if none is found, drive by the variant type
for( SetterEntry* p = setters; p->cls!=NULL; p++ ) {
if( v.vt==p->vt ) {
return p->handler->get(env,&v,retType);
}
}
// consider a conversion from SAFEARRAY
if((v.vt&VT_ARRAY)!=0) {
return safearray::SafeArrayXducer::toJava(env,v.parray);
}
// everything failed
return reinterpret_cast<jobject>(-1);
}