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| -rw-r--r-- | include/ucbhelper/resultset.hxx | 435 |
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diff --git a/include/ucbhelper/resultset.hxx b/include/ucbhelper/resultset.hxx new file mode 100644 index 000000000..6790c3dd1 --- /dev/null +++ b/include/ucbhelper/resultset.hxx @@ -0,0 +1,435 @@ +/* -*- 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_UCBHELPER_RESULTSET_HXX +#define INCLUDED_UCBHELPER_RESULTSET_HXX + +#include <com/sun/star/lang/XServiceInfo.hpp> +#include <com/sun/star/lang/XComponent.hpp> +#include <com/sun/star/ucb/XContentAccess.hpp> +#include <com/sun/star/sdbc/XResultSet.hpp> +#include <com/sun/star/sdbc/XResultSetMetaDataSupplier.hpp> +#include <com/sun/star/sdbc/XRow.hpp> +#include <com/sun/star/sdbc/XCloseable.hpp> +#include <com/sun/star/beans/XPropertySet.hpp> + +#include <rtl/ref.hxx> +#include <salhelper/simplereferenceobject.hxx> +#include <cppuhelper/implbase.hxx> +#include <ucbhelper/ucbhelperdllapi.h> +#include <memory> + +namespace com::sun::star::uno { class XComponentContext; } +namespace com::sun::star::ucb { class XCommandEnvironment; } + +namespace ucbhelper { + + +inline constexpr OUStringLiteral RESULTSET_SERVICE_NAME = u"com.sun.star.ucb.ContentResultSet"; + + +class ResultSetDataSupplier; +struct ResultSet_Impl; + +/** + * This is an implementation of the service com.sun.star.ucb.ContentResultSet. + * It can be used to implement the method XDynamicResultSet::getStaticResultSet, + * which needs to be implemented for instance to implement the command "open" + * at folder objects. This class uses a user supplied ResultSetDataSupplier + * object to request data on demand. + * + * @see ResultSetDataSupplier + */ +class UCBHELPER_DLLPUBLIC ResultSet final : + public cppu::WeakImplHelper< + css::lang::XServiceInfo, + css::lang::XComponent, + css::ucb::XContentAccess, + css::sdbc::XResultSet, + css::sdbc::XResultSetMetaDataSupplier, + css::sdbc::XRow, + css::sdbc::XCloseable, + css::beans::XPropertySet> +{ + std::unique_ptr<ResultSet_Impl> m_pImpl; + +public: + /** + * Construction. + * + * @param rxSMgr is a Service Manager. + * @param rProperties is a sequence of properties for that the resultset + * shall be able to obtain the values. + * @param rDataSupplier is a supplier for the resultset data. + */ + ResultSet( + const css::uno::Reference< css::uno::XComponentContext >& rxContext, + const css::uno::Sequence< css::beans::Property >& rProperties, + const rtl::Reference< ResultSetDataSupplier >& rDataSupplier ); + /** + * Construction. + * + * @param rxSMgr is a Service Manager. + * @param rProperties is a sequence of properties for that the resultset + * shall be able to obtain the values. + * @param rDataSupplier is a supplier for the resultset data. + * @param rxEnv is the environment for interactions, progress propagation, + * ... + */ + ResultSet( + const css::uno::Reference< css::uno::XComponentContext >& rxContext, + const css::uno::Sequence< css::beans::Property >& rProperties, + const rtl::Reference< ResultSetDataSupplier >& rDataSupplier, + const css::uno::Reference< css::ucb::XCommandEnvironment >& rxEnv ); + virtual ~ResultSet() override; + + // XServiceInfo + virtual OUString SAL_CALL getImplementationName() override; + virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override; + virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override; + + // XComponent + virtual void SAL_CALL + dispose() override; + virtual void SAL_CALL + addEventListener( const css::uno::Reference< css::lang::XEventListener >& Listener ) override; + virtual void SAL_CALL + removeEventListener( const css::uno::Reference< css::lang::XEventListener >& Listener ) override; + + // XContentAccess + virtual OUString SAL_CALL + queryContentIdentifierString() override; + virtual css::uno::Reference< css::ucb::XContentIdentifier > SAL_CALL + queryContentIdentifier() override; + virtual css::uno::Reference< css::ucb::XContent > SAL_CALL + queryContent() override; + + // XResultSetMetaDataSupplier + virtual css::uno::Reference< css::sdbc::XResultSetMetaData > SAL_CALL + getMetaData() override; + + // XResultSet + virtual sal_Bool SAL_CALL + next() override; + virtual sal_Bool SAL_CALL + isBeforeFirst() override; + virtual sal_Bool SAL_CALL + isAfterLast() override; + virtual sal_Bool SAL_CALL + isFirst() override; + virtual sal_Bool SAL_CALL + isLast() override; + virtual void SAL_CALL + beforeFirst() override; + virtual void SAL_CALL + afterLast() override; + virtual sal_Bool SAL_CALL + first() override; + virtual sal_Bool SAL_CALL + last() override; + virtual sal_Int32 SAL_CALL + getRow() override; + virtual sal_Bool SAL_CALL + absolute( sal_Int32 row ) override; + virtual sal_Bool SAL_CALL + relative( sal_Int32 rows ) override; + virtual sal_Bool SAL_CALL + previous() override; + virtual void SAL_CALL + refreshRow() override; + virtual sal_Bool SAL_CALL + rowUpdated() override; + virtual sal_Bool SAL_CALL + rowInserted() override; + virtual sal_Bool SAL_CALL + rowDeleted() override; + virtual css::uno::Reference< css::uno::XInterface > SAL_CALL + getStatement() override; + + // XRow + virtual sal_Bool SAL_CALL + wasNull() override; + virtual OUString SAL_CALL + getString( sal_Int32 columnIndex ) override; + virtual sal_Bool SAL_CALL + getBoolean( sal_Int32 columnIndex ) override; + virtual sal_Int8 SAL_CALL + getByte( sal_Int32 columnIndex ) override; + virtual sal_Int16 SAL_CALL + getShort( sal_Int32 columnIndex ) override; + virtual sal_Int32 SAL_CALL + getInt( sal_Int32 columnIndex ) override; + virtual sal_Int64 SAL_CALL + getLong( sal_Int32 columnIndex ) override; + virtual float SAL_CALL + getFloat( sal_Int32 columnIndex ) override; + virtual double SAL_CALL + getDouble( sal_Int32 columnIndex ) override; + virtual css::uno::Sequence< sal_Int8 > SAL_CALL + getBytes( sal_Int32 columnIndex ) override; + virtual css::util::Date SAL_CALL + getDate( sal_Int32 columnIndex ) override; + virtual css::util::Time SAL_CALL + getTime( sal_Int32 columnIndex ) override; + virtual css::util::DateTime SAL_CALL + getTimestamp( sal_Int32 columnIndex ) override; + virtual css::uno::Reference< + css::io::XInputStream > SAL_CALL + getBinaryStream( sal_Int32 columnIndex ) override; + virtual css::uno::Reference< + css::io::XInputStream > SAL_CALL + getCharacterStream( sal_Int32 columnIndex ) override; + virtual css::uno::Any SAL_CALL + getObject( sal_Int32 columnIndex, + const css::uno::Reference< css::container::XNameAccess >& typeMap ) override; + virtual css::uno::Reference< css::sdbc::XRef > SAL_CALL + getRef( sal_Int32 columnIndex ) override; + virtual css::uno::Reference< + css::sdbc::XBlob > SAL_CALL + getBlob( sal_Int32 columnIndex ) override; + virtual css::uno::Reference< css::sdbc::XClob > SAL_CALL + getClob( sal_Int32 columnIndex ) override; + virtual css::uno::Reference< css::sdbc::XArray > SAL_CALL + getArray( sal_Int32 columnIndex ) override; + + // XCloseable + virtual void SAL_CALL + close() override; + + // XPropertySet + virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL + getPropertySetInfo() override; + virtual void SAL_CALL + setPropertyValue( const OUString& aPropertyName, + const css::uno::Any& aValue ) override; + virtual css::uno::Any SAL_CALL + getPropertyValue( const OUString& PropertyName ) override; + virtual void SAL_CALL + addPropertyChangeListener( const OUString& aPropertyName, + const css::uno::Reference< css::beans::XPropertyChangeListener >& xListener ) override; + virtual void SAL_CALL + removePropertyChangeListener( const OUString& aPropertyName, + const css::uno::Reference< css::beans::XPropertyChangeListener >& aListener ) override; + virtual void SAL_CALL + addVetoableChangeListener( const OUString& PropertyName, + const css::uno::Reference< css::beans::XVetoableChangeListener >& aListener ) override; + virtual void SAL_CALL + removeVetoableChangeListener( const OUString& PropertyName, + const css::uno::Reference< css::beans::XVetoableChangeListener >& aListener ) override; + + + // Non-interface methods. + + + /** + * This method propagates property value changes to all registered + * listeners. + * + * @param rEvt is a property change event. + */ + void propertyChanged( + const css::beans::PropertyChangeEvent& rEvt ) const; + + /** + * This method should be called by the data supplier for the result set + * to indicate that there were new data obtained from the data source. + * + * @param nOld is the old count of rows; must be non-negative. + * @param nnew is the new count of rows; must be non-negative. + */ + void rowCountChanged( sal_uInt32 nOld, sal_uInt32 nNew ); + + /** + * This method should be called by the data supplier for the result set + * to indicate that there were all rows obtained from the data source. + */ + void rowCountFinal(); + + /** + * This method returns a sequence containing all properties ( not the + * values! ) of the result set. + * + * @return a sequence of properties. + */ + const css::uno::Sequence< css::beans::Property >& + getProperties() const; + + /** + * This method returns the environment to use for interactions, progress + * propagation, ... It can by empty. + * + * @return an environment or an empty reference. + */ + const css::uno::Reference< css::ucb::XCommandEnvironment >& + getEnvironment() const; +}; + + +/** + * This is the base class for an object that supplies data to a result set + * + * @see ResultSet + */ +class ResultSetDataSupplier : public salhelper::SimpleReferenceObject +{ + friend class ResultSet; + + // No ref, otherwise we get a cyclic reference between supplier and set! + // Will be set from ResultSet ctor. + ResultSet* m_pResultSet; + +public: + ResultSetDataSupplier() : m_pResultSet( nullptr ) {} + + /** + * This method returns the resultset this supplier belongs to. + * + * @return the resultset for that the supplier supplies data. + */ + rtl::Reference< ResultSet > getResultSet() const { return m_pResultSet; } + + /** + * This method returns the identifier string of the content at the + * specified index. + * + * @param nIndex is the zero-based index within the logical data array + * of the supplier; must be non-negative. + * @return the content's identifier string. + */ + virtual OUString queryContentIdentifierString( sal_uInt32 nIndex ) = 0; + + /** + * This method returns the identifier of the content at the specified index. + * + * @param nIndex is the zero-based index within the logical data array + * of the supplier; must be non-negative. + * @return the content's identifier. + */ + virtual css::uno::Reference< css::ucb::XContentIdentifier > + queryContentIdentifier( sal_uInt32 nIndex ) = 0; + + /** + * This method returns the content at the specified index. + * + * @param nIndex is the zero-based index within the logical data array + * of the supplier; must be non-negative. + * @return the content. + */ + virtual css::uno::Reference< css::ucb::XContent > + queryContent( sal_uInt32 nIndex ) = 0; + + /** + * This method returns whether there is a content at the specified index. + * + * @param nIndex is the zero-based index within the logical data array + * of the supplier; must be non-negative. + * @return true, if there is a content at the given index. + */ + virtual bool getResult( sal_uInt32 nIndex ) = 0; + + /** + * This method returns the total count of objects in the logical data array + * of the supplier. The implementation of this method may be very + * "expensive", because it can be necessary to obtain all data in order + * to determine the count. Therefore the ResultSet implementation calls + * it very seldom. + * + * @return the total count of objects; will always be non-negative. + */ + virtual sal_uInt32 totalCount() = 0; + + /** + * This method returns the count of objects obtained so far. There is no + * for the implementation to obtain all objects at once. It can obtain + * all data on demand. + * + * The implementation should call m_pResultSet->rowCountChanged(...) + * every time it has inserted a new entry in its logical result array. + * + * @return the count of objects obtained so far; will always be + * non-negative. + */ + virtual sal_uInt32 currentCount() = 0; + + /** + * This method returns whether the value returned by currentCount() is + * "final". This is the case, if that there was all data obtained by the + * supplier and the current count won't increase any more. + * + * The implementation should call m_pResultSet->rowCountFinal(...) if + * it has inserted all entries in its logical result array. + * + * @return true, if the value returned by currentCount() won't change + anymore. + */ + virtual bool isCountFinal() = 0; + + /** + * This method returns an object for accessing the property values at + * the specified index. The implementation may use the helper class + * ucb::PropertyValueSet to provide the return value. + * + * @param nIndex is the zero-based index within the logical data array + * of the supplier. + * @return the object for accessing the property values. + */ + virtual css::uno::Reference< css::sdbc::XRow > + queryPropertyValues( sal_uInt32 nIndex ) = 0; + + /** + * This method is called to instruct the supplier to release the (possibly + * present) property values at the given index. + * + * @param nIndex is the zero-based index within the logical data array + * of the supplier. + */ + virtual void releasePropertyValues( sal_uInt32 nIndex ) = 0; + + /** + * This method will be called by the resultset implementation in order + * to instruct the data supplier to release all resources it has + * allocated so far. In case the supplier is collecting data + * asynchronously, that process must be stopped. + */ + virtual void close() = 0; + + /** + * This method will be called by the resultset implementation in order + * check, whether an error has occurred while collecting data. The + * implementation of this method must throw an exception in that case. + * + * Note: An exception thrown to indicate an error must always be thrown + * by the thread that created the data supplier. If the supplier collects + * data asynchronously ( i.e. in a separate thread ) and an error + * occurs, throwing of the appropriate exception must be deferred + * until validate() is called by the ResultSet implementation from + * inside the main thread. + * In case data are obtained synchronously, the ResultSetException can + * be thrown directly. + * + * @exception ResultSetException thrown, if an error has occurred + */ + virtual void validate() = 0; +}; + +} + +#endif /* ! INCLUDED_UCBHELPER_RESULTSET_HXX */ + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |