jdbc/Blob.cxx

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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#include <java/sql/Blob.hxx>
#include <java/io/InputStream.hxx>
#include <connectivity/dbexception.hxx>
#include <osl/diagnose.h>
 
#include <string.h>
 
using namespace connectivity;
 
//************ Class: java.sql.Blob
 
 
jclass java_sql_Blob::theClass = nullptr;
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() const
{
    // the class must be fetched only once, therefore it's static
    if( !theClass )
        theClass = findMyClass("java/sql/Blob");
    return theClass;
}
 
sal_Int64 SAL_CALL java_sql_Blob::length(  )
{
    jlong out(0);
    SDBThreadAttach t; OSL_ENSURE(t.pEnv,"Java environment has been deleted!");
 
    {
        // initialize temporary variable
        static const char * const cSignature = "()J";
        static const char * const cMethodName = "length";
        // submit Java-Call
        static jmethodID mID(nullptr);
        obtainMethodId_throwSQL(t.pEnv, cMethodName,cSignature, mID);
        out = t.pEnv->CallLongMethod( object, mID );
        ThrowSQLException(t.pEnv,*this);
    } //t.pEnv
    return static_cast<sal_Int64>(out);
}
css::uno::Sequence< sal_Int8 > SAL_CALL java_sql_Blob::getBytes( sal_Int64 pos, sal_Int32 count )
{
 
    SDBThreadAttach t; OSL_ENSURE(t.pEnv,"Java environment has been deleted!");
    css::uno::Sequence< sal_Int8 > aSeq;
    {
        // initialize temporary variable
        static const char * const cSignature = "(JI)[B";
        static const char * const cMethodName = "getBytes";
        // submit Java-Call
        static jmethodID mID(nullptr);
        obtainMethodId_throwSQL(t.pEnv, cMethodName,cSignature, mID);
        jbyteArray out = static_cast<jbyteArray>(t.pEnv->CallObjectMethod( object, mID,pos,count));
        ThrowSQLException(t.pEnv,*this);
        if(out)
        {
            jboolean p = false;
            aSeq.realloc(t.pEnv->GetArrayLength(out));
            memcpy(aSeq.getArray(),t.pEnv->GetByteArrayElements(out,&p),aSeq.getLength());
            t.pEnv->DeleteLocalRef(out);
        }
    } //t.pEnv
    // WARNING: the caller becomes the owner of the returned pointer
    return  aSeq;
}
 
css::uno::Reference< css::io::XInputStream > SAL_CALL java_sql_Blob::getBinaryStream(  )
{
    SDBThreadAttach t; OSL_ENSURE(t.pEnv,"Java environment has been deleted!");
    static jmethodID mID(nullptr);
    jobject out = callObjectMethod(t.pEnv,"getBinaryStream","()Ljava/io/InputStream;", mID);
    // WARNING: the caller becomes the owner of the returned pointer
    return out==nullptr ? nullptr : new java_io_InputStream( t.pEnv, out );
}
 
sal_Int64 SAL_CALL java_sql_Blob::position( const css::uno::Sequence< sal_Int8 >& pattern, sal_Int64 start )
{
    jlong out(0);
    SDBThreadAttach t; OSL_ENSURE(t.pEnv,"Java environment has been deleted!");
 
    {
        // initialize temporary variable
        static const char * const cSignature = "([BI)J";
        static const char * const cMethodName = "position";
        // submit Java-Call
        static jmethodID mID(nullptr);
        obtainMethodId_throwSQL(t.pEnv, cMethodName,cSignature, mID);
        // convert Parameter
        jbyteArray pByteArray = t.pEnv->NewByteArray(pattern.getLength());
        jbyte * patternData = reinterpret_cast<jbyte *>(
            const_cast<sal_Int8 *>(pattern.getConstArray()));
            // 4th param of Set*ArrayRegion changed from pointer to non-const to
            // pointer to const between <http://docs.oracle.com/javase/6/docs/
            // technotes/guides/jni/spec/functions.html#wp22933> and
            // <http://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/
            // functions.html#wp22933>; work around that difference in a way
            // that doesn't trigger loplugin:redundantcast
        t.pEnv->SetByteArrayRegion(pByteArray,0,pattern.getLength(),patternData);
        out = t.pEnv->CallLongMethod( object, mID, pByteArray,start );
        t.pEnv->DeleteLocalRef(pByteArray);
        ThrowSQLException(t.pEnv,*this);
    } //t.pEnv
    return static_cast<sal_Int64>(out);
}
 
sal_Int64 SAL_CALL java_sql_Blob::positionOfBlob( const css::uno::Reference< css::sdbc::XBlob >& /*pattern*/, sal_Int64 /*start*/ )
{
    ::dbtools::throwFeatureNotImplementedSQLException( "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 pattern into a byte[] -, we defer this functionality for the moment (hey, it was
    // unusable, anyway)
    // #i57457#
    return 0;
}
 
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