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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include "CacheSet.hxx"
#include <core_resource.hxx>
#include <strings.hrc>
#include <strings.hxx>
#include <com/sun/star/sdbcx/CompareBookmark.hpp>
#include <com/sun/star/sdbc/XResultSetMetaDataSupplier.hpp>
#include <com/sun/star/beans/XPropertySet.hpp>
#include <com/sun/star/sdbc/XDatabaseMetaData.hpp>
#include <com/sun/star/sdbc/XPreparedStatement.hpp>
#include <com/sun/star/sdbc/ColumnValue.hpp>
#include <com/sun/star/sdbc/XParameters.hpp>
#include <stringconstants.hxx>
#include <com/sun/star/sdbcx/XKeysSupplier.hpp>
#include <com/sun/star/sdbcx/XIndexesSupplier.hpp>

#include <limits>

#include <connectivity/dbtools.hxx>
#include <com/sun/star/sdbcx/KeyType.hpp>
#include <com/sun/star/io/XInputStream.hpp>
#include <comphelper/types.hxx>
#include <rtl/ustrbuf.hxx>
#include <sal/log.hxx>

using namespace comphelper;

using namespace dbaccess;
using namespace dbtools;
using namespace connectivity;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::sdbc;
using namespace ::com::sun::star::sdbcx;
using namespace ::com::sun::star::container;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::io;
using namespace ::osl;


OCacheSet::OCacheSet(sal_Int32 i_nMaxRows)
            :m_nMaxRows(i_nMaxRows)
            ,m_bInserted(false)
            ,m_bUpdated(false)
            ,m_bDeleted(false)
{

}

OUString OCacheSet::getIdentifierQuoteString() const
{
    OUString sQuote;
    Reference<XDatabaseMetaData> xMeta;
    if ( m_xConnection.is() && (xMeta = m_xConnection->getMetaData()).is() )
        sQuote = xMeta->getIdentifierQuoteString();
    return sQuote;
}

void OCacheSet::construct(  const Reference< XResultSet>& _xDriverSet,const OUString &i_sRowSetFilter)
{
    OSL_ENSURE(_xDriverSet.is(),"Invalid resultSet");

    m_sRowSetFilter = i_sRowSetFilter;

    if(_xDriverSet.is())
    {
        m_xDriverSet = _xDriverSet;
        m_xDriverRow.set(_xDriverSet,UNO_QUERY);
        m_xSetMetaData = Reference<XResultSetMetaDataSupplier>(_xDriverSet,UNO_QUERY)->getMetaData();
        if ( m_xSetMetaData.is() )
        {
            const sal_Int32 nCount = m_xSetMetaData->getColumnCount();
            m_aNullable.resize(nCount);
            m_aSignedFlags.resize(nCount);
            m_aColumnTypes.resize(nCount);
            auto pNullableIter = m_aNullable.begin();
            auto pSignedIter = m_aSignedFlags.begin();
            auto pColumnIter = m_aColumnTypes.begin();
            for (sal_Int32 i=1; i <= nCount; ++i,++pSignedIter,++pColumnIter,++pNullableIter)
            {
                *pNullableIter = m_xSetMetaData->isNullable(i) != ColumnValue::NO_NULLS;
                *pSignedIter = m_xSetMetaData->isSigned(i);
                *pColumnIter = m_xSetMetaData->getColumnType(i);
            }
        }
        Reference< XStatement> xStmt(m_xDriverSet->getStatement(),UNO_QUERY);
        if(xStmt.is())
            m_xConnection = xStmt->getConnection();
        else
        {
            Reference< XPreparedStatement> xPrepStmt(m_xDriverSet->getStatement(),UNO_QUERY);
            if ( xPrepStmt.is() )
                m_xConnection = xPrepStmt->getConnection();
        }
    }
}

OCacheSet::~OCacheSet()
{
    try
    {
        m_xDriverSet = nullptr;
        m_xDriverRow = nullptr;
        m_xSetMetaData = nullptr;
        m_xConnection = nullptr;
    }
    catch(Exception&)
    {
        SAL_WARN("dbaccess", "Exception occurred");
    }
    catch(...)
    {
        SAL_WARN("dbaccess", "Unknown Exception occurred");
    }

}

void OCacheSet::fillTableName(const Reference<XPropertySet>& _xTable)
{
    OSL_ENSURE(_xTable.is(),"OCacheSet::fillTableName: PropertySet is empty!");
    if(m_aComposedTableName.isEmpty() && _xTable.is() )
    {
        Reference<XDatabaseMetaData> xMeta(m_xConnection->getMetaData());
        m_aComposedTableName = composeTableName(xMeta
                        ,comphelper::getString(_xTable->getPropertyValue(PROPERTY_CATALOGNAME))
                        ,comphelper::getString(_xTable->getPropertyValue(PROPERTY_SCHEMANAME))
                        ,comphelper::getString(_xTable->getPropertyValue(PROPERTY_NAME))
                        ,true
                        ,::dbtools::EComposeRule::InDataManipulation);
    }
}

void OCacheSet::insertRow( const ORowSetRow& _rInsertRow,const connectivity::OSQLTable& _xTable )
{
    Reference<XPropertySet> xSet(_xTable,UNO_QUERY);
    fillTableName(xSet);

    OUStringBuffer aSql("INSERT INTO " + m_aComposedTableName + " ( ");

    // set values and column names
    OUStringBuffer aValues(" VALUES ( ");
    OUString aQuote = getIdentifierQuoteString();
    sal_Int32 i = 1;
    ORowVector< ORowSetValue >::Vector::const_iterator aIter = _rInsertRow->get().begin()+1;
    connectivity::ORowVector< ORowSetValue > ::Vector::iterator aEnd = _rInsertRow->get().end();
    for(; aIter != aEnd;++aIter)
    {
        aSql.append(::dbtools::quoteName( aQuote,m_xSetMetaData->getColumnName(i++)) ).append(",");
        aValues.append("?,");
    }

    aSql[aSql.getLength() - 1] = ')';
    aValues[aValues.getLength() - 1] = ')';

    aSql.append(aValues.makeStringAndClear());
    // now create end execute the prepared statement
    {
        Reference< XPreparedStatement > xPrep(m_xConnection->prepareStatement(aSql.makeStringAndClear()));
        Reference< XParameters > xParameter(xPrep,UNO_QUERY);
        i = 1;
        for(aIter = _rInsertRow->get().begin()+1; aIter != aEnd;++aIter,++i)
        {
            if(aIter->isNull())
                xParameter->setNull(i,aIter->getTypeKind());
            else
                setParameter(i,xParameter,*aIter,m_xSetMetaData->getColumnType(i),m_xSetMetaData->getScale(i));
        }

        m_bInserted = xPrep->executeUpdate() > 0;
    }

    // TODO set the bookmark in the insert row
}

void OCacheSet::fillParameters( const ORowSetRow& _rRow
                                        ,const connectivity::OSQLTable& _xTable
                                        ,OUStringBuffer& _sCondition
                                        ,OUStringBuffer& _sParameter
                                        ,std::vector< sal_Int32>& _rOrgValues)
{
    // use keys and indexes for exact positioning
    // first the keys
    Reference<XPropertySet> xSet(_xTable,UNO_QUERY);
    const Reference<XNameAccess> xPrimaryKeyColumns = getPrimaryKeyColumns_throw(xSet);
    // second the indexes
    Reference<XIndexesSupplier> xIndexSup(_xTable,UNO_QUERY);
    Reference<XIndexAccess> xIndexes;
    if(xIndexSup.is())
        xIndexes.set(xIndexSup->getIndexes(),UNO_QUERY);

    Reference<XPropertySet> xIndexColsSup;
    std::vector< Reference<XNameAccess> > aAllIndexColumns;
    if(xIndexes.is())
    {
        for(sal_Int32 j=0;j<xIndexes->getCount();++j)
        {
            xIndexColsSup.set(xIndexes->getByIndex(j),UNO_QUERY);
            if( xIndexColsSup.is()
                && comphelper::getBOOL(xIndexColsSup->getPropertyValue(PROPERTY_ISUNIQUE))
                && !comphelper::getBOOL(xIndexColsSup->getPropertyValue(PROPERTY_ISPRIMARYKEYINDEX))
              )
                aAllIndexColumns.push_back(Reference<XColumnsSupplier>(xIndexColsSup,UNO_QUERY)->getColumns());
        }
    }

    OUString aColumnName;

    static const char aAnd[] = " AND ";

    OUString aQuote  = getIdentifierQuoteString();

    sal_Int32 nCheckCount = 1; // index for the original values
    sal_Int32 i = 1;

    OUString sIsNull(" IS NULL");
    OUString sParam(" = ?");
    ORowVector< ORowSetValue >::Vector::const_iterator aIter = _rRow->get().begin()+1;
    ORowVector< ORowSetValue >::Vector::const_iterator aEnd = _rRow->get().end();
    for(; aIter != aEnd;++aIter,++nCheckCount,++i)
    {
        aColumnName = m_xSetMetaData->getColumnName(i);
        if(xPrimaryKeyColumns.is() && xPrimaryKeyColumns->hasByName(aColumnName))
        {
            _sCondition.append(::dbtools::quoteName( aQuote,aColumnName));
            if(aIter->isNull())
                _sCondition.append(sIsNull);
            else
                _sCondition.append(sParam);
            _sCondition.append(aAnd);
            _rOrgValues.push_back(nCheckCount);

        }
        for (auto const& indexColumn : aAllIndexColumns)
        {
            if(indexColumn->hasByName(aColumnName))
            {<--- Consider using std::any_of algorithm instead of a raw loop.
                _sCondition.append(::dbtools::quoteName( aQuote,aColumnName));
                if(aIter->isNull())
                    _sCondition.append(sIsNull);
                else
                    _sCondition.append(sParam);
                _sCondition.append(aAnd);
                _rOrgValues.push_back(nCheckCount);
                break;
            }
        }
        if(aIter->isModified())
        {
            _sParameter.append(::dbtools::quoteName( aQuote,aColumnName) ).append("?,");
        }
    }
}

void OCacheSet::updateRow(const ORowSetRow& _rInsertRow ,const ORowSetRow& _rOriginalRow,const connectivity::OSQLTable& _xTable  )
{
    Reference<XPropertySet> xSet(_xTable,UNO_QUERY);
    fillTableName(xSet);

    OUStringBuffer aSql("UPDATE " + m_aComposedTableName + " SET ");
    // list all columns that should be set

    OUStringBuffer aCondition;
    std::vector< sal_Int32> aOrgValues;
    fillParameters(_rInsertRow,_xTable,aCondition,aSql,aOrgValues);
    aSql[aSql.getLength() - 1] = ' ';
    if ( !aCondition.isEmpty() )
    {
        aCondition.setLength(aCondition.getLength()-5);

        aSql.append(" WHERE " ).append( aCondition.makeStringAndClear());
    }
    else
        ::dbtools::throwSQLException(
            DBA_RES( RID_STR_NO_UPDATE_MISSING_CONDITION ), StandardSQLState::GENERAL_ERROR, *this );

    // now create end execute the prepared statement
    Reference< XPreparedStatement > xPrep(m_xConnection->prepareStatement(aSql.makeStringAndClear()));
    Reference< XParameters > xParameter(xPrep,UNO_QUERY);
    sal_Int32 i = 1;
    connectivity::ORowVector< ORowSetValue > ::Vector::iterator aEnd = _rInsertRow->get().end();
    for(ORowVector< ORowSetValue >::Vector::const_iterator aIter = _rInsertRow->get().begin()+1; aIter != aEnd;++aIter)
    {
        if(aIter->isModified())
        {
            setParameter(i,xParameter,*aIter,m_xSetMetaData->getColumnType(i),m_xSetMetaData->getScale(i));
            ++i;
        }
    }
    for (auto const& orgValue : aOrgValues)
    {
        setParameter(i,xParameter,(_rOriginalRow->get())[orgValue],m_xSetMetaData->getColumnType(i),m_xSetMetaData->getScale(i));
        ++i;
    }

     m_bUpdated = xPrep->executeUpdate() > 0;
}

void OCacheSet::deleteRow(const ORowSetRow& _rDeleteRow ,const connectivity::OSQLTable& _xTable  )
{
    Reference<XPropertySet> xSet(_xTable,UNO_QUERY);
    fillTableName(xSet);

    OUStringBuffer aSql("DELETE FROM " + m_aComposedTableName + " WHERE ");

    // use keys and indexes for exact positioning
    // first the keys
    const Reference<XNameAccess> xPrimaryKeyColumns = getPrimaryKeyColumns_throw(xSet);
    // second the indexes
    Reference<XIndexesSupplier> xIndexSup(_xTable,UNO_QUERY);
    Reference<XIndexAccess> xIndexes;
    if(xIndexSup.is())
        xIndexes.set(xIndexSup->getIndexes(),UNO_QUERY);

    //  Reference<XColumnsSupplier>
    Reference<XPropertySet> xIndexColsSup;
    std::vector< Reference<XNameAccess> > aAllIndexColumns;
    if(xIndexes.is())
    {
        for(sal_Int32 j=0;j<xIndexes->getCount();++j)
        {
            xIndexColsSup.set(xIndexes->getByIndex(j),UNO_QUERY);
            if( xIndexColsSup.is()
                && comphelper::getBOOL(xIndexColsSup->getPropertyValue(PROPERTY_ISUNIQUE))
                && !comphelper::getBOOL(xIndexColsSup->getPropertyValue(PROPERTY_ISPRIMARYKEYINDEX))
              )
                aAllIndexColumns.push_back(Reference<XColumnsSupplier>(xIndexColsSup,UNO_QUERY)->getColumns());
        }
    }

    OUStringBuffer aColumnName;
    std::vector< sal_Int32> aOrgValues;
    fillParameters(_rDeleteRow,_xTable,aSql,aColumnName,aOrgValues);

    aSql.setLength(aSql.getLength()-5);

    // now create and execute the prepared statement
    Reference< XPreparedStatement > xPrep(m_xConnection->prepareStatement(aSql.makeStringAndClear()));
    Reference< XParameters > xParameter(xPrep,UNO_QUERY);
    sal_Int32 i = 1;
    for (auto const& orgValue : aOrgValues)
    {
        setParameter(i,xParameter,(_rDeleteRow->get())[orgValue],m_xSetMetaData->getColumnType(i),m_xSetMetaData->getScale(i));
        ++i;
    }

    m_bDeleted = xPrep->executeUpdate() > 0;
}

void OCacheSet::setParameter(sal_Int32 nPos
                             ,const Reference< XParameters >& _xParameter
                             ,const ORowSetValue& _rValue
                             ,sal_Int32 _nType
                             ,sal_Int32 _nScale)
{
    sal_Int32 nType = ( _nType != DataType::OTHER ) ? _nType : _rValue.getTypeKind();
    ::dbtools::setObjectWithInfo(_xParameter,nPos,_rValue,nType,_nScale);
}

void OCacheSet::fillValueRow(ORowSetRow& _rRow,sal_Int32 _nPosition)
{
    Any aBookmark = getBookmark();
    if(!aBookmark.hasValue())
        aBookmark <<= _nPosition;

    connectivity::ORowVector< ORowSetValue >::Vector::iterator aIter = _rRow->get().begin();
    connectivity::ORowVector< ORowSetValue >::Vector::iterator aEnd = _rRow->get().end();
    (*aIter) = aBookmark;
    ++aIter;
    for(sal_Int32 i=1;aIter != aEnd;++aIter,++i)
    {
        aIter->setSigned(m_aSignedFlags[i-1]);
        aIter->fill(i, m_aColumnTypes[i-1], this);
    }
}

sal_Bool SAL_CALL OCacheSet::wasNull(  )
{
    return m_xDriverRow->wasNull();
}

OUString SAL_CALL OCacheSet::getString( sal_Int32 columnIndex )
{
    return m_xDriverRow->getString(columnIndex);
}

sal_Bool SAL_CALL OCacheSet::getBoolean( sal_Int32 columnIndex )
{
    return m_xDriverRow->getBoolean(columnIndex);
}

sal_Int8 SAL_CALL OCacheSet::getByte( sal_Int32 columnIndex )
{
    return m_xDriverRow->getByte(columnIndex);
}

sal_Int16 SAL_CALL OCacheSet::getShort( sal_Int32 columnIndex )
{
    return m_xDriverRow->getShort(columnIndex);
}

sal_Int32 SAL_CALL OCacheSet::getInt( sal_Int32 columnIndex )
{
    return m_xDriverRow->getInt(columnIndex);
}

sal_Int64 SAL_CALL OCacheSet::getLong( sal_Int32 columnIndex )
{
    return m_xDriverRow->getLong(columnIndex);
}

float SAL_CALL OCacheSet::getFloat( sal_Int32 columnIndex )
{
    return m_xDriverRow->getFloat(columnIndex);
}

double SAL_CALL OCacheSet::getDouble( sal_Int32 columnIndex )
{
    return m_xDriverRow->getDouble(columnIndex);
}

Sequence< sal_Int8 > SAL_CALL OCacheSet::getBytes( sal_Int32 columnIndex )
{
    return m_xDriverRow->getBytes(columnIndex);
}

css::util::Date SAL_CALL OCacheSet::getDate( sal_Int32 columnIndex )
{
    return m_xDriverRow->getDate(columnIndex);
}

css::util::Time SAL_CALL OCacheSet::getTime( sal_Int32 columnIndex )
{
    return m_xDriverRow->getTime(columnIndex);
}

css::util::DateTime SAL_CALL OCacheSet::getTimestamp( sal_Int32 columnIndex )
{
    return m_xDriverRow->getTimestamp(columnIndex);
}

Reference< css::io::XInputStream > SAL_CALL OCacheSet::getBinaryStream( sal_Int32 columnIndex )
{
    return m_xDriverRow->getBinaryStream(columnIndex);
}

Reference< css::io::XInputStream > SAL_CALL OCacheSet::getCharacterStream( sal_Int32 columnIndex )
{
    return m_xDriverRow->getCharacterStream(columnIndex);
}

Any SAL_CALL OCacheSet::getObject( sal_Int32 columnIndex, const Reference< css::container::XNameAccess >& typeMap )
{
    return m_xDriverRow->getObject(columnIndex,typeMap);
}

Reference< XRef > SAL_CALL OCacheSet::getRef( sal_Int32 columnIndex )
{
    return m_xDriverRow->getRef(columnIndex);
}

Reference< XBlob > SAL_CALL OCacheSet::getBlob( sal_Int32 columnIndex )
{
    return m_xDriverRow->getBlob(columnIndex);
}

Reference< XClob > SAL_CALL OCacheSet::getClob( sal_Int32 columnIndex )
{
    return m_xDriverRow->getClob(columnIndex);
}

Reference< XArray > SAL_CALL OCacheSet::getArray( sal_Int32 columnIndex )
{
    return m_xDriverRow->getArray(columnIndex);
}

// XResultSet
bool OCacheSet::next()
{
    m_bInserted = m_bUpdated = m_bDeleted = false;
    return m_xDriverSet->next();
}

void OCacheSet::beforeFirst(  )
{
    m_bInserted = m_bUpdated = m_bDeleted = false;
    m_xDriverSet->beforeFirst();
}

void OCacheSet::afterLast(  )
{
    m_bInserted = m_bUpdated = m_bDeleted = false;
    m_xDriverSet->afterLast();
}

bool OCacheSet::first()
{
    m_bInserted = m_bUpdated = m_bDeleted = false;
    return m_xDriverSet->first();
}

bool OCacheSet::last()
{
    m_bInserted = m_bUpdated = m_bDeleted = false;
    return m_xDriverSet->last();
}

sal_Int32 OCacheSet::getRow(  )
{
    return m_xDriverSet->getRow();
}

bool OCacheSet::absolute( sal_Int32 row )
{
    m_bInserted = m_bUpdated = m_bDeleted = false;
    return m_xDriverSet->absolute(row);
}

bool OCacheSet::previous(  )
{
    m_bInserted = m_bUpdated = m_bDeleted = false;
    return m_xDriverSet->previous();
}

bool OCacheSet::last_checked( bool /*i_bFetchRow*/)
{
    return last();
}

bool OCacheSet::previous_checked( bool /*i_bFetchRow*/ )
{
    return previous();
}

bool OCacheSet::absolute_checked( sal_Int32 row,bool /*i_bFetchRow*/ )
{
    return absolute(row);
}

void OCacheSet::refreshRow(  )
{
    m_xDriverSet->refreshRow();
}

bool OCacheSet::rowUpdated(  )
{
    return m_xDriverSet->rowUpdated();
}

bool OCacheSet::rowInserted(  )
{
    return m_xDriverSet->rowInserted();
}

bool OCacheSet::rowDeleted(  )
{
    return m_xDriverSet->rowDeleted();
}

bool OCacheSet::isResultSetChanged() const
{
    return false;
}

void OCacheSet::mergeColumnValues(sal_Int32 i_nColumnIndex,ORowSetValueVector::Vector& /*io_aInsertRow*/,ORowSetValueVector::Vector& /*io_aRow*/,std::vector<sal_Int32>& o_aChangedColumns)
{
    o_aChangedColumns.push_back(i_nColumnIndex);
}

bool OCacheSet::columnValuesUpdated(ORowSetValueVector::Vector& /*io_aCachedRow*/,const ORowSetValueVector::Vector& /*io_aRow*/)
{
    return false;
}

bool OCacheSet::updateColumnValues(const ORowSetValueVector::Vector& /*io_aCachedRow*/,ORowSetValueVector::Vector& /*io_aRow*/,const std::vector<sal_Int32>& /*i_aChangedColumns*/)
{
    return true;
}

void OCacheSet::fillMissingValues(ORowSetValueVector::Vector& /*io_aRow*/) const
{
}

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