libreoffice/connectivity/source/drivers/jdbc/Blob.cxx

/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2008 by Sun Microsystems, Inc.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * $RCSfile: Blob.cxx,v $
 * $Revision: 1.12 $
 *
 * This file is part of OpenOffice.org.
 *
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 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
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 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_connectivity.hxx"
#include "java/sql/Blob.hxx"
#include "java/tools.hxx"
#include "java/io/InputStream.hxx"
#ifndef _INC_MEMORY
//#include <memory.h>
#endif
#include <connectivity/dbexception.hxx>

#include <string.h>

using namespace connectivity;
//**************************************************************
//************ Class: java.sql.Blob
//**************************************************************

jclass java_sql_Blob::theClass = 0;
java_sql_Blob::java_sql_Blob( JNIEnv * pEnv, jobject myObj )
    : java_lang_Object( pEnv, myObj )
{
    SDBThreadAttach::addRef();
}
java_sql_Blob::~java_sql_Blob()
{
    SDBThreadAttach::releaseRef();
}

jclass java_sql_Blob::getMyClass()
{
    // die Klasse muss nur einmal geholt werden, daher statisch
    if( !theClass ){
        SDBThreadAttach t;
        if( !t.pEnv ) return (jclass)NULL;
        jclass tempClass = t.pEnv->FindClass( "java/sql/Blob" );
        jclass globClass = (jclass)t.pEnv->NewGlobalRef( tempClass );
        t.pEnv->DeleteLocalRef( tempClass );
        saveClassRef( globClass );
    }
    return theClass;
}

void java_sql_Blob::saveClassRef( jclass pClass )
{
    if( pClass==NULL  )
        return;
    // der uebergebe Klassen-Handle ist schon global, daher einfach speichern
    theClass = pClass;
}

sal_Int64 SAL_CALL java_sql_Blob::length(  ) throw(::com::sun::star::sdbc::SQLException, ::com::sun::star::uno::RuntimeException)
{
    jlong out(0);
    SDBThreadAttach t; OSL_ENSURE(t.pEnv,"Java Enviroment geloescht worden!");
    if( t.pEnv )
    {
        // temporaere Variable initialisieren
        static const char * cSignature = "()J";
        static const char * cMethodName = "length";
        // Java-Call absetzen
        static jmethodID mID = NULL;
        if ( !mID  )
            mID  = t.pEnv->GetMethodID( getMyClass(), cMethodName, cSignature );OSL_ENSURE(mID,"Unknown method id!");
        if( mID ){
            out = t.pEnv->CallLongMethod( object, mID );
            ThrowSQLException(t.pEnv,*this);
            // und aufraeumen
        } //mID
    } //t.pEnv
    return (sal_Int64)out;
}
::com::sun::star::uno::Sequence< sal_Int8 > SAL_CALL java_sql_Blob::getBytes( sal_Int64 pos, sal_Int32 count ) throw(::com::sun::star::sdbc::SQLException, ::com::sun::star::uno::RuntimeException)
{

    SDBThreadAttach t; OSL_ENSURE(t.pEnv,"Java Enviroment geloescht worden!");
    ::com::sun::star::uno::Sequence< sal_Int8 > aSeq;
    if( t.pEnv ){
        // temporaere Variable initialisieren
        static const char * cSignature = "(JI)[B";
        static const char * cMethodName = "getBytes";
        // Java-Call absetzen
        static jmethodID mID = NULL;
        if ( !mID  )
            mID  = t.pEnv->GetMethodID( getMyClass(), cMethodName, cSignature );OSL_ENSURE(mID,"Unknown method id!");
        if( mID ){
            jbyteArray out = (jbyteArray)t.pEnv->CallObjectMethod( object, mID,pos,count);
            ThrowSQLException(t.pEnv,*this);
            if(out)
            {
                jboolean p = sal_False;
                aSeq.realloc(t.pEnv->GetArrayLength(out));
                memcpy(aSeq.getArray(),t.pEnv->GetByteArrayElements(out,&p),aSeq.getLength());
                t.pEnv->DeleteLocalRef(out);
            }
            // und aufraeumen
        } //mID
    } //t.pEnv
    // ACHTUNG: der Aufrufer wird Eigentuemer des zurueckgelieferten Zeigers !!!
    return  aSeq;
}

::com::sun::star::uno::Reference< ::com::sun::star::io::XInputStream > SAL_CALL java_sql_Blob::getBinaryStream(  ) throw(::com::sun::star::sdbc::SQLException, ::com::sun::star::uno::RuntimeException)
{
    jobject out(0);
    SDBThreadAttach t; OSL_ENSURE(t.pEnv,"Java Enviroment geloescht worden!");
    if( t.pEnv ){
        // temporaere Variable initialisieren
        static const char * cSignature = "()Ljava/io/InputStream;";
        static const char * cMethodName = "getBinaryStream";
        // Java-Call absetzen
        static jmethodID mID = NULL;
        if ( !mID  )
            mID  = t.pEnv->GetMethodID( getMyClass(), cMethodName, cSignature );OSL_ENSURE(mID,"Unknown method id!");
        if( mID ){
            out = t.pEnv->CallObjectMethod( object, mID);
            ThrowSQLException(t.pEnv,*this);
        } //mID
    } //t.pEnv
    // ACHTUNG: der Aufrufer wird Eigentuemer des zurueckgelieferten Zeigers !!!
    return out==0 ? 0 : new java_io_InputStream( t.pEnv, out );
}

sal_Int64 SAL_CALL java_sql_Blob::position( const ::com::sun::star::uno::Sequence< sal_Int8 >& pattern, sal_Int64 start ) throw(::com::sun::star::sdbc::SQLException, ::com::sun::star::uno::RuntimeException)
{
    jlong out(0);
    SDBThreadAttach t; OSL_ENSURE(t.pEnv,"Java Enviroment geloescht worden!");
    if( t.pEnv )
    {
        // temporaere Variable initialisieren
        static const char * cSignature = "([BI)J";
        static const char * cMethodName = "position";
        // Java-Call absetzen
        static jmethodID mID = NULL;
        if ( !mID  )
            mID  = t.pEnv->GetMethodID( getMyClass(), cMethodName, cSignature );OSL_ENSURE(mID,"Unknown method id!");
        if( mID ){
            // Parameter konvertieren
            jbyteArray pByteArray = t.pEnv->NewByteArray(pattern.getLength());
            t.pEnv->SetByteArrayRegion(pByteArray,0,pattern.getLength(),(jbyte*)pattern.getConstArray());
            out = t.pEnv->CallLongMethod( object, mID, pByteArray,start );
            t.pEnv->DeleteLocalRef(pByteArray);
            ThrowSQLException(t.pEnv,*this);
            // und aufraeumen
        } //mID
    } //t.pEnv
    return (sal_Int64)out;
}

sal_Int64 SAL_CALL java_sql_Blob::positionOfBlob( const ::com::sun::star::uno::Reference< ::com::sun::star::sdbc::XBlob >& /*pattern*/, sal_Int64 /*start*/ ) throw(::com::sun::star::sdbc::SQLException, ::com::sun::star::uno::RuntimeException)
{
    ::dbtools::throwFeatureNotImplementedException( "XBlob::positionOfBlob", *this );
    // this was put here in CWS warnings01. The previous implementation was defective, as it did ignore
    // the pattern parameter. Since the effort for proper implementation is rather high - we would need
    // to translated patter into a byte[] -, we defer this functionality for the moment (hey, it was
    // unusable, anyway)
    // 2005-11-15 / #i57457# / frank.schoenheit@sun.com
    return 0;
}