libreoffice/xmlhelp/source/cxxhelp/provider/resultsetbase.cxx

/* -*- 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 <ucbhelper/contentidentifier.hxx>
#include <com/sun/star/sdbc/SQLException.hpp>
#include <com/sun/star/uno/Reference.h>
#include <com/sun/star/beans/PropertyAttribute.hpp>
#include <ucbhelper/resultsetmetadata.hxx>
#include <cppuhelper/queryinterface.hxx>
#include <utility>

#include "resultsetbase.hxx"

using namespace chelp;
using namespace com::sun::star;

ResultSetBase::ResultSetBase( uno::Reference< uno::XComponentContext >  xContext,
                              uno::Reference< ucb::XContentProvider >  xProvider,
                              const uno::Sequence< beans::Property >& seq )
    : m_xContext(std::move( xContext )),
      m_xProvider(std::move( xProvider )),
      m_nRow( -1 ),
      m_nWasNull( true ),
      m_sProperty( seq )
{
}

ResultSetBase::~ResultSetBase()
{
}


// XInterface

void SAL_CALL
ResultSetBase::acquire()
    noexcept
{
    OWeakObject::acquire();
}


void SAL_CALL
ResultSetBase::release()
    noexcept
{
    OWeakObject::release();
}


uno::Any SAL_CALL
ResultSetBase::queryInterface( const uno::Type& rType )
{
    uno::Any aRet = cppu::queryInterface( rType,
                                          static_cast< lang::XComponent* >(this),
                                          static_cast< sdbc::XRow* >(this),
                                          static_cast< sdbc::XResultSet* >(this),
                                          static_cast< sdbc::XResultSetMetaDataSupplier* >(this),
                                          static_cast< beans::XPropertySet* >(this),
                                          static_cast< ucb::XContentAccess* >(this) );
    return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
}


// XComponent


void SAL_CALL
ResultSetBase::addEventListener(
    const uno::Reference< lang::XEventListener >& Listener )
{
    std::unique_lock aGuard( m_aMutex );
    m_aDisposeEventListeners.addInterface( aGuard, Listener );
}


void SAL_CALL
ResultSetBase::removeEventListener(
    const uno::Reference< lang::XEventListener >& Listener )
{
    std::unique_lock aGuard( m_aMutex );
    m_aDisposeEventListeners.removeInterface( aGuard, Listener );
}


void SAL_CALL
ResultSetBase::dispose()
{
    std::unique_lock aGuard( m_aMutex );

    lang::EventObject aEvt;
    aEvt.Source = static_cast< lang::XComponent * >( this );

    if ( m_aDisposeEventListeners.getLength(aGuard) )
    {
        m_aDisposeEventListeners.disposeAndClear( aGuard, aEvt );
    }
    if( m_aRowCountListeners.getLength(aGuard) )
    {
        m_aRowCountListeners.disposeAndClear( aGuard, aEvt );
    }
    if( m_aIsFinalListeners.getLength(aGuard) )
    {
        m_aIsFinalListeners.disposeAndClear( aGuard, aEvt );
    }
}


//  XResultSet

sal_Bool SAL_CALL
ResultSetBase::next()
{
    m_nRow++;
    return sal::static_int_cast<sal_uInt32>( m_nRow ) < m_aItems.size();
}


sal_Bool SAL_CALL
ResultSetBase::isBeforeFirst()
{
    return m_nRow == -1;
}


sal_Bool SAL_CALL
ResultSetBase::isAfterLast()
{
    return sal::static_int_cast<sal_uInt32>( m_nRow ) >= m_aItems.size();   // Cannot happen, if m_aFolder.isOpen()
}


sal_Bool SAL_CALL
ResultSetBase::isFirst()
{
    return m_nRow == 0;
}


sal_Bool SAL_CALL
ResultSetBase::isLast()
{
    if( sal::static_int_cast<sal_uInt32>( m_nRow ) ==  m_aItems.size() - 1 )
        return true;
    else
        return false;
}


void SAL_CALL
ResultSetBase::beforeFirst()
{
    m_nRow = -1;
}


void SAL_CALL
ResultSetBase::afterLast()
{
    m_nRow = m_aItems.size();
}


sal_Bool SAL_CALL
ResultSetBase::first()
{
    m_nRow = -1;
    return next();
}


sal_Bool SAL_CALL
ResultSetBase::last()
{
    m_nRow = m_aItems.size() - 1;
    return true;
}


sal_Int32 SAL_CALL
ResultSetBase::getRow()
{
    // Test, whether behind last row
    if( -1 == m_nRow || sal::static_int_cast<sal_uInt32>( m_nRow ) >= m_aItems.size() )
        return 0;
    else
        return m_nRow+1;
}


sal_Bool SAL_CALL ResultSetBase::absolute( sal_Int32 row )
{
    if( row >= 0 )
        m_nRow = row - 1;
    else
    {
        last();
        m_nRow += ( row + 1 );
        if( m_nRow < -1 )
            m_nRow = -1;
    }

    return 0<= m_nRow && sal::static_int_cast<sal_uInt32>( m_nRow ) < m_aItems.size();
}


sal_Bool SAL_CALL
ResultSetBase::relative( sal_Int32 row )
{
    if( isAfterLast() || isBeforeFirst() )
        throw sdbc::SQLException();

    if( row > 0 )
        while( row-- )
            next();
    else if( row < 0 )
        while( row++ && m_nRow > -1 )
            previous();

    return 0 <= m_nRow && sal::static_int_cast<sal_uInt32>( m_nRow ) < m_aItems.size();
}


sal_Bool SAL_CALL
ResultSetBase::previous()
{
    if( sal::static_int_cast<sal_uInt32>( m_nRow ) > m_aItems.size() )
        m_nRow = m_aItems.size();  // Correct Handling of afterLast
    if( 0 <= m_nRow ) -- m_nRow;

    return 0 <= m_nRow && sal::static_int_cast<sal_uInt32>( m_nRow ) < m_aItems.size();
}


void SAL_CALL
ResultSetBase::refreshRow()
{
}


sal_Bool SAL_CALL
ResultSetBase::rowUpdated()
{
    return false;
}

sal_Bool SAL_CALL
ResultSetBase::rowInserted()
{
    return false;
}

sal_Bool SAL_CALL
ResultSetBase::rowDeleted()
{
    return false;
}


uno::Reference< uno::XInterface > SAL_CALL
ResultSetBase::getStatement()
{
    return uno::Reference< uno::XInterface >();
}


// XCloseable

void SAL_CALL
ResultSetBase::close()
{
}


OUString SAL_CALL
ResultSetBase::queryContentIdentifierString()
{
    if( 0 <= m_nRow && sal::static_int_cast<sal_uInt32>( m_nRow ) < m_aItems.size() )
        return m_aPath[m_nRow];
    else
        return OUString();
}


uno::Reference< ucb::XContentIdentifier > SAL_CALL
ResultSetBase::queryContentIdentifier()
{
    if( 0 <= m_nRow && sal::static_int_cast<sal_uInt32>( m_nRow ) < m_aItems.size() )
    {
        OUString url = queryContentIdentifierString();
        if( ! m_aIdents[m_nRow].is() && !url.isEmpty() )
            m_aIdents[m_nRow].set( new ::ucbhelper::ContentIdentifier( url ) );
        return m_aIdents[m_nRow];
    }

    return uno::Reference< ucb::XContentIdentifier >();
}


uno::Reference< ucb::XContent > SAL_CALL
ResultSetBase::queryContent()
{
    if( 0 <= m_nRow && sal::static_int_cast<sal_uInt32>( m_nRow ) < m_aItems.size() )
        return m_xProvider->queryContent( queryContentIdentifier() );
    else
        return uno::Reference< ucb::XContent >();
}

namespace {

class XPropertySetInfoImpl
    : public cppu::OWeakObject,
      public beans::XPropertySetInfo
{
public:

    explicit XPropertySetInfoImpl( const uno::Sequence< beans::Property >& aSeq )
        : m_aSeq( aSeq )
    {
    }

    void SAL_CALL acquire()
        noexcept override
    {
        OWeakObject::acquire();
    }


    void SAL_CALL release()
        noexcept override
    {
        OWeakObject::release();
    }

    uno::Any SAL_CALL queryInterface( const uno::Type& rType ) override
    {
        uno::Any aRet = cppu::queryInterface( rType,
                                              static_cast< beans::XPropertySetInfo* >(this) );
        return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
    }

    uno::Sequence< beans::Property > SAL_CALL getProperties() override
    {
        return m_aSeq;
    }

    beans::Property SAL_CALL getPropertyByName( const OUString& aName ) override
    {
        auto pProp = std::find_if(std::cbegin(m_aSeq), std::cend(m_aSeq),
            [&aName](const beans::Property& rProp) { return aName == rProp.Name; });
        if (pProp != std::cend(m_aSeq))
            return *pProp;
        throw beans::UnknownPropertyException(aName);
    }

    sal_Bool SAL_CALL hasPropertyByName( const OUString& Name ) override
    {
        return std::any_of(std::cbegin(m_aSeq), std::cend(m_aSeq),
            [&Name](const beans::Property& rProp) { return Name == rProp.Name; });
    }

private:

    uno::Sequence< beans::Property > m_aSeq;
};

}

// XPropertySet
uno::Reference< beans::XPropertySetInfo > SAL_CALL
ResultSetBase::getPropertySetInfo()
{
    uno::Sequence< beans::Property > seq
    {
        { u"RowCount"_ustr, -1, cppu::UnoType<sal_Int32>::get(), beans::PropertyAttribute::READONLY },
        { u"IsRowCountFinal"_ustr, -1, cppu::UnoType<sal_Bool>::get(), beans::PropertyAttribute::READONLY }
    };

    //t
    return uno::Reference< beans::XPropertySetInfo > ( new XPropertySetInfoImpl( seq ) );
}


void SAL_CALL ResultSetBase::setPropertyValue(
    const OUString& aPropertyName, const uno::Any& )
{
    if( aPropertyName == "IsRowCountFinal" ||
        aPropertyName == "RowCount" )
        return;

    throw beans::UnknownPropertyException(aPropertyName);
}


uno::Any SAL_CALL ResultSetBase::getPropertyValue(
    const OUString& PropertyName )
{
    if( PropertyName == "IsRowCountFinal" )
    {
        return uno::Any(true);
    }
    else if ( PropertyName == "RowCount" )
    {
        sal_Int32 count = m_aItems.size();
        return uno::Any(count);
    }
    else
        throw beans::UnknownPropertyException(PropertyName);
}


void SAL_CALL ResultSetBase::addPropertyChangeListener(
    const OUString& aPropertyName,
    const uno::Reference< beans::XPropertyChangeListener >& xListener )
{
    if( aPropertyName == "IsRowCountFinal" )
    {
        std::unique_lock aGuard( m_aMutex );
        m_aIsFinalListeners.addInterface( aGuard, xListener );
    }
    else if ( aPropertyName == "RowCount" )
    {
        std::unique_lock aGuard( m_aMutex );
        m_aRowCountListeners.addInterface( aGuard, xListener );
    }
    else
        throw beans::UnknownPropertyException(aPropertyName);
}


void SAL_CALL ResultSetBase::removePropertyChangeListener(
    const OUString& aPropertyName,
    const uno::Reference< beans::XPropertyChangeListener >& aListener )
{
    if( aPropertyName == "IsRowCountFinal" )
    {
        std::unique_lock aGuard( m_aMutex );
        m_aIsFinalListeners.removeInterface( aGuard, aListener );
    }
    else if ( aPropertyName == "RowCount" )
    {
        std::unique_lock aGuard( m_aMutex );
        m_aRowCountListeners.removeInterface( aGuard, aListener );
    }
    else
        throw beans::UnknownPropertyException(aPropertyName);
}


void SAL_CALL ResultSetBase::addVetoableChangeListener(
    const OUString&,
    const uno::Reference< beans::XVetoableChangeListener >& )
{}


void SAL_CALL ResultSetBase::removeVetoableChangeListener(
    const OUString&,
    const uno::Reference< beans::XVetoableChangeListener >& )
{}


// XResultSetMetaDataSupplier
uno::Reference< sdbc::XResultSetMetaData > SAL_CALL
ResultSetBase::getMetaData()
{
    return new ::ucbhelper::ResultSetMetaData( m_xContext, m_sProperty );
}

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