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libreoffice/connectivity/source/drivers/mysqlc/mysqlc_prepared_resultset.hxx
Tamas Bunth 41d3be4a48 mysqlc: Fix query of cursor position in result set 
Fix queries like "IsAfterLast" in result sets of prepared statements in
the mysql driver.

Cursor position is stored in the driver, since the mysql C driver does
not support the query of the cursor position.

The cursor position works the following way:
- 0 means the cursor is on "BeforeFirst". In that state calling of
  getXXX() methods is user error.
- 1 means the first row is already fetched.
- n means the last fow is fetched, where n is the total number of rows
  in the result set.
- Everything bigger than n is "AfterLast"

Change-Id: I131f2042606897019cc0f868dbc4151faf4850ac
Reviewed-on: https://gerrit.libreoffice.org/76549
Tested-by: Jenkins
Reviewed-by: Tamás Bunth <btomi96@gmail.com>
2019-07-29 22:33:38 +02:00

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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 .
*/
#ifndef INCLUDED_MYSQLC_SOURCE_MYSQLC_RESULTSET_HXX
#define INCLUDED_MYSQLC_SOURCE_MYSQLC_RESULTSET_HXX
#include "mysqlc_preparedstatement.hxx"
#include "mysqlc_statement.hxx"
#include "mysqlc_subcomponent.hxx"
#include "mysqlc_connection.hxx"
#include <com/sun/star/sdbc/XCloseable.hpp>
#include <com/sun/star/sdbc/XColumnLocate.hpp>
#include <com/sun/star/sdbc/XResultSet.hpp>
#include <com/sun/star/sdbc/XResultSetMetaDataSupplier.hpp>
#include <com/sun/star/sdbc/XResultSetUpdate.hpp>
#include <com/sun/star/sdbc/XRow.hpp>
#include <com/sun/star/sdbc/XRowUpdate.hpp>
#include <com/sun/star/sdbc/XWarningsSupplier.hpp>
#include <com/sun/star/sdbcx/XDeleteRows.hpp>
#include <com/sun/star/sdbcx/XRowLocate.hpp>
#include <com/sun/star/util/XCancellable.hpp>
#include <connectivity/FValue.hxx>
#include <cppuhelper/compbase12.hxx>
namespace connectivity
{
namespace mysqlc
{
using ::com::sun::star::sdbc::SQLException;
using ::com::sun::star::uno::Any;
using ::com::sun::star::uno::RuntimeException;
typedef ::cppu::WeakComponentImplHelper12<
css::sdbc::XResultSet, css::sdbc::XRow, css::sdbc::XResultSetMetaDataSupplier,
css::util::XCancellable, css::sdbc::XWarningsSupplier, css::sdbc::XResultSetUpdate,
css::sdbc::XRowUpdate, css::sdbcx::XRowLocate, css::sdbcx::XDeleteRows, css::sdbc::XCloseable,
css::sdbc::XColumnLocate, css::lang::XServiceInfo>
OPreparedResultSet_BASE;
class OPreparedResultSet final : public OBase_Mutex,
public OPreparedResultSet_BASE,
public ::cppu::OPropertySetHelper,
public OPropertyArrayUsageHelper<OPreparedResultSet>
{
OConnection& m_rConnection;
css::uno::WeakReferenceHelper m_aStatement;
css::uno::Reference<css::sdbc::XResultSetMetaData> m_xMetaData;
// non-owning pointers
MYSQL_RES* m_pResult;
MYSQL_STMT* m_pStmt;
MYSQL_FIELD* m_aFields;
rtl_TextEncoding m_encoding;
sal_Int32 m_nCurrentRow = 0;
sal_Int32 m_nColumnCount;
sal_Int32 m_nRowCount;
// Use c style arrays, because we have to work with pointers
// on these.
std::unique_ptr<MYSQL_BIND[]> m_aData;
std::unique_ptr<BindMetaData[]> m_aMetaData;
bool m_bWasNull = false;
// OPropertyArrayUsageHelper
::cppu::IPropertyArrayHelper* createArrayHelper() const override;
// OPropertySetHelper
::cppu::IPropertyArrayHelper& SAL_CALL getInfoHelper() override;
sal_Bool SAL_CALL convertFastPropertyValue(Any& rConvertedValue, Any& rOldValue,
sal_Int32 nHandle, const Any& rValue) override;
void SAL_CALL setFastPropertyValue_NoBroadcast(sal_Int32 nHandle, const Any& rValue) override;
void SAL_CALL getFastPropertyValue(Any& rValue, sal_Int32 nHandle) const override;
template <typename T> T safelyRetrieveValue(const sal_Int32 nColumnIndex);
template <typename T> T retrieveValue(const sal_Int32 nColumnIndex);
connectivity::ORowSetValue getRowSetValue(sal_Int32 nColumnIndex);
bool fetchResult();
// you can't delete objects of this type
virtual ~OPreparedResultSet() override = default;
public:
virtual OUString SAL_CALL getImplementationName() override;
virtual sal_Bool SAL_CALL supportsService(OUString const& ServiceName) override;
virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
OPreparedResultSet(OConnection& rConn, OPreparedStatement* pStmt, MYSQL_STMT* pMyStmt);
// ::cppu::OComponentHelper
void SAL_CALL disposing() override;
// XInterface
Any SAL_CALL queryInterface(const css::uno::Type& rType) override;
void SAL_CALL acquire() throw() override;
void SAL_CALL release() throw() override;
//XTypeProvider
css::uno::Sequence<css::uno::Type> SAL_CALL getTypes() override;
// XPropertySet
css::uno::Reference<css::beans::XPropertySetInfo> SAL_CALL getPropertySetInfo() override;
// XResultSet
sal_Bool SAL_CALL next() override;
sal_Bool SAL_CALL isBeforeFirst() override;
sal_Bool SAL_CALL isAfterLast() override;
sal_Bool SAL_CALL isFirst() override;
sal_Bool SAL_CALL isLast() override;
void SAL_CALL beforeFirst() override;
void SAL_CALL afterLast() override;
sal_Bool SAL_CALL first() override;
sal_Bool SAL_CALL last() override;
sal_Int32 SAL_CALL getRow() override;
sal_Bool SAL_CALL absolute(sal_Int32 row) override;
sal_Bool SAL_CALL relative(sal_Int32 rows) override;
sal_Bool SAL_CALL previous() override;
void SAL_CALL refreshRow() override;
sal_Bool SAL_CALL rowUpdated() override;
sal_Bool SAL_CALL rowInserted() override;
sal_Bool SAL_CALL rowDeleted() override;
css::uno::Reference<css::uno::XInterface> SAL_CALL getStatement() override;
// XRow
sal_Bool SAL_CALL wasNull() override;
OUString SAL_CALL getString(sal_Int32 column) override;
sal_Bool SAL_CALL getBoolean(sal_Int32 column) override;
sal_Int8 SAL_CALL getByte(sal_Int32 column) override;
sal_Int16 SAL_CALL getShort(sal_Int32 column) override;
sal_Int32 SAL_CALL getInt(sal_Int32 column) override;
sal_Int64 SAL_CALL getLong(sal_Int32 column) override;
float SAL_CALL getFloat(sal_Int32 column) override;
double SAL_CALL getDouble(sal_Int32 column) override;
css::uno::Sequence<sal_Int8> SAL_CALL getBytes(sal_Int32 column) override;
css::util::Date SAL_CALL getDate(sal_Int32 column) override;
css::util::Time SAL_CALL getTime(sal_Int32 column) override;
css::util::DateTime SAL_CALL getTimestamp(sal_Int32 column) override;
css::uno::Reference<css::io::XInputStream> SAL_CALL getBinaryStream(sal_Int32 column) override;
css::uno::Reference<css::io::XInputStream>
SAL_CALL getCharacterStream(sal_Int32 column) override;
Any SAL_CALL getObject(
sal_Int32 column, const css::uno::Reference<css::container::XNameAccess>& typeMap) override;
css::uno::Reference<css::sdbc::XRef> SAL_CALL getRef(sal_Int32 column) override;
css::uno::Reference<css::sdbc::XBlob> SAL_CALL getBlob(sal_Int32 column) override;
css::uno::Reference<css::sdbc::XClob> SAL_CALL getClob(sal_Int32 column) override;
css::uno::Reference<css::sdbc::XArray> SAL_CALL getArray(sal_Int32 column) override;
// XResultSetMetaDataSupplier
css::uno::Reference<css::sdbc::XResultSetMetaData> SAL_CALL getMetaData() override;
// XCancellable
void SAL_CALL cancel() override;
// XCloseable
void SAL_CALL close() override;
// XWarningsSupplier
Any SAL_CALL getWarnings() override;
void SAL_CALL clearWarnings() override;
// XResultSetUpdate
void SAL_CALL insertRow() override;
void SAL_CALL updateRow() override;
void SAL_CALL deleteRow() override;
void SAL_CALL cancelRowUpdates() override;
void SAL_CALL moveToInsertRow() override;
void SAL_CALL moveToCurrentRow() override;
// XRowUpdate
void SAL_CALL updateNull(sal_Int32 column) override;
void SAL_CALL updateBoolean(sal_Int32 column, sal_Bool x) override;
void SAL_CALL updateByte(sal_Int32 column, sal_Int8 x) override;
void SAL_CALL updateShort(sal_Int32 column, sal_Int16 x) override;
void SAL_CALL updateInt(sal_Int32 column, sal_Int32 x) override;
void SAL_CALL updateLong(sal_Int32 column, sal_Int64 x) override;
void SAL_CALL updateFloat(sal_Int32 column, float x) override;
void SAL_CALL updateDouble(sal_Int32 column, double x) override;
void SAL_CALL updateString(sal_Int32 column, const OUString& x) override;
void SAL_CALL updateBytes(sal_Int32 column, const css::uno::Sequence<sal_Int8>& x) override;
void SAL_CALL updateDate(sal_Int32 column, const css::util::Date& x) override;
void SAL_CALL updateTime(sal_Int32 column, const css::util::Time& x) override;
void SAL_CALL updateTimestamp(sal_Int32 column, const css::util::DateTime& x) override;
void SAL_CALL updateBinaryStream(sal_Int32 column,
const css::uno::Reference<css::io::XInputStream>& x,
sal_Int32 length) override;
void SAL_CALL updateCharacterStream(sal_Int32 column,
const css::uno::Reference<css::io::XInputStream>& x,
sal_Int32 length) override;
void SAL_CALL updateObject(sal_Int32 column, const Any& x) override;
void SAL_CALL updateNumericObject(sal_Int32 column, const Any& x, sal_Int32 scale) override;
// XColumnLocate
sal_Int32 SAL_CALL findColumn(const OUString& columnName) override;
// XRowLocate
Any SAL_CALL getBookmark() override;
sal_Bool SAL_CALL moveToBookmark(const Any& bookmark) override;
sal_Bool SAL_CALL moveRelativeToBookmark(const Any& bookmark, sal_Int32 rows) override;
sal_Int32 SAL_CALL compareBookmarks(const Any& first, const Any& second) override;
sal_Bool SAL_CALL hasOrderedBookmarks() override;
sal_Int32 SAL_CALL hashBookmark(const Any& bookmark) override;
// XDeleteRows
css::uno::Sequence<sal_Int32> SAL_CALL deleteRows(const css::uno::Sequence<Any>& rows) override;
/// @throws SQLException
/// @throws RuntimeException
void checkColumnIndex(sal_Int32 index);
private:
using ::cppu::OPropertySetHelper::getFastPropertyValue;
};
} /* mysqlc */
} /* connectivity */
#endif // CONNECTIVITY_SRESULTSET_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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