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Diffstat (limited to 'comphelper/source/container/enumerablemap.cxx')
| -rw-r--r-- | comphelper/source/container/enumerablemap.cxx | 713 |
1 files changed, 713 insertions, 0 deletions
diff --git a/comphelper/source/container/enumerablemap.cxx b/comphelper/source/container/enumerablemap.cxx new file mode 100644 index 000000000..6ca7c36d2 --- /dev/null +++ b/comphelper/source/container/enumerablemap.cxx @@ -0,0 +1,713 @@ +/* -*- 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 <comphelper/anytostring.hxx> +#include <comphelper/anycompare.hxx> +#include <comphelper/componentbase.hxx> + +#include <com/sun/star/container/XEnumerableMap.hpp> +#include <com/sun/star/lang/NoSupportException.hpp> +#include <com/sun/star/lang/XInitialization.hpp> +#include <com/sun/star/ucb/AlreadyInitializedException.hpp> +#include <com/sun/star/beans/IllegalTypeException.hpp> +#include <com/sun/star/beans/Pair.hpp> +#include <com/sun/star/lang/XServiceInfo.hpp> +#include <com/sun/star/uno/XComponentContext.hpp> + +#include <cppuhelper/compbase3.hxx> +#include <cppuhelper/implbase.hxx> +#include <cppuhelper/supportsservice.hxx> +#include <typelib/typedescription.hxx> + +#include <cmath> +#include <map> +#include <memory> +#include <optional> +#include <utility> + +namespace comphelper +{ + + + using ::com::sun::star::uno::Reference; + using ::com::sun::star::uno::XInterface; + using ::com::sun::star::uno::UNO_QUERY; + using ::com::sun::star::uno::RuntimeException; + using ::com::sun::star::uno::Any; + using ::com::sun::star::uno::Sequence; + using ::com::sun::star::uno::Type; + using ::com::sun::star::container::XEnumerableMap; + using ::com::sun::star::lang::NoSupportException; + using ::com::sun::star::beans::IllegalTypeException; + using ::com::sun::star::container::NoSuchElementException; + using ::com::sun::star::lang::IllegalArgumentException; + using ::com::sun::star::lang::XInitialization; + using ::com::sun::star::ucb::AlreadyInitializedException; + using ::com::sun::star::beans::Pair; + using ::com::sun::star::uno::TypeClass; + using ::com::sun::star::uno::TypeClass_VOID; + using ::com::sun::star::uno::TypeClass_UNKNOWN; + using ::com::sun::star::uno::TypeClass_ANY; + using ::com::sun::star::uno::TypeClass_EXCEPTION; + using ::com::sun::star::uno::TypeClass_STRUCT; + using ::com::sun::star::uno::TypeClass_FLOAT; + using ::com::sun::star::uno::TypeClass_DOUBLE; + using ::com::sun::star::uno::TypeClass_INTERFACE; + using ::com::sun::star::lang::XServiceInfo; + using ::com::sun::star::uno::XComponentContext; + using ::com::sun::star::container::XEnumeration; + using ::com::sun::star::uno::TypeDescription; + using ::com::sun::star::lang::DisposedException; + + namespace { + + class MapEnumerator; + + } + + typedef std::map< Any, Any, LessPredicateAdapter > KeyedValues; + + namespace { + + struct MapData + { + Type m_aKeyType; + Type m_aValueType; + std::optional< KeyedValues > m_pValues; + std::shared_ptr< IKeyPredicateLess > m_pKeyCompare; + bool m_bMutable; + std::vector< MapEnumerator* > m_aModListeners; + + MapData() + :m_bMutable( true ) + { + } + + MapData( const MapData& _source ) + :m_aKeyType( _source.m_aKeyType ) + ,m_aValueType( _source.m_aValueType ) + ,m_pKeyCompare( _source.m_pKeyCompare ) + ,m_bMutable( false ) + { + m_pValues.emplace( *_source.m_pValues ); + } + private: + MapData& operator=( const MapData& _source ) = delete; + }; + + } + + static void lcl_registerMapModificationListener( MapData& _mapData, MapEnumerator& _listener ) + { + #if OSL_DEBUG_LEVEL > 0 + for ( const MapEnumerator* lookup : _mapData.m_aModListeners ) + { + OSL_ENSURE( lookup != &_listener, "lcl_registerMapModificationListener: this listener is already registered!" ); + } + #endif + _mapData.m_aModListeners.push_back( &_listener ); + } + + + static void lcl_revokeMapModificationListener( MapData& _mapData, MapEnumerator& _listener ) + { + auto lookup = std::find(_mapData.m_aModListeners.begin(), _mapData.m_aModListeners.end(), &_listener); + if (lookup != _mapData.m_aModListeners.end()) + { + _mapData.m_aModListeners.erase( lookup ); + return; + } + OSL_FAIL( "lcl_revokeMapModificationListener: the listener is not registered!" ); + } + + + static void lcl_notifyMapDataListeners_nothrow( const MapData& _mapData ); + + + // EnumerableMap + + typedef ::cppu::WeakAggComponentImplHelper3 < XInitialization + , XEnumerableMap + , XServiceInfo + > Map_IFace; + + namespace { + + class EnumerableMap: public Map_IFace, public ComponentBase + { + public: + EnumerableMap(); + protected: + virtual ~EnumerableMap() override; + + // XInitialization + virtual void SAL_CALL initialize( const Sequence< Any >& aArguments ) override; + + // XEnumerableMap + virtual css::uno::Reference< css::container::XEnumeration > SAL_CALL createKeyEnumeration( sal_Bool Isolated ) override; + virtual css::uno::Reference< css::container::XEnumeration > SAL_CALL createValueEnumeration( sal_Bool Isolated ) override; + virtual css::uno::Reference< css::container::XEnumeration > SAL_CALL createElementEnumeration( sal_Bool Isolated ) override; + + // XMap + virtual Type SAL_CALL getKeyType() override; + virtual Type SAL_CALL getValueType() override; + virtual void SAL_CALL clear( ) override; + virtual sal_Bool SAL_CALL containsKey( const Any& _key ) override; + virtual sal_Bool SAL_CALL containsValue( const Any& _value ) override; + virtual Any SAL_CALL get( const Any& _key ) override; + virtual Any SAL_CALL put( const Any& _key, const Any& _value ) override; + virtual Any SAL_CALL remove( const Any& _key ) override; + + // XElementAccess (base of XMap) + virtual Type SAL_CALL getElementType() override; + virtual sal_Bool SAL_CALL hasElements() override; + + // XServiceInfo + virtual OUString SAL_CALL getImplementationName( ) override; + virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override; + virtual Sequence< OUString > SAL_CALL getSupportedServiceNames( ) override; + + private: + void impl_initValues_throw( const Sequence< Pair< Any, Any > >& _initialValues ); + + /// throws an IllegalTypeException if the given value is not compatible with our ValueType + void impl_checkValue_throw( const Any& _value ) const; + void impl_checkKey_throw( const Any& _key ) const; + void impl_checkNaN_throw( const Any& _keyOrValue, const Type& _keyOrValueType ) const; + void impl_checkMutable_throw() const; + + private: + ::osl::Mutex m_aMutex; + MapData m_aData; + }; + + enum EnumerationType + { + eKeys, eValues, eBoth + }; + + class MapEnumerator final + { + public: + MapEnumerator( ::cppu::OWeakObject& _rParent, MapData& _mapData, const EnumerationType _type ) + :m_rParent( _rParent ) + ,m_rMapData( _mapData ) + ,m_eType( _type ) + ,m_mapPos( _mapData.m_pValues->begin() ) + ,m_disposed( false ) + { + lcl_registerMapModificationListener( m_rMapData, *this ); + } + + ~MapEnumerator() + { + dispose(); + } + + void dispose() + { + if ( !m_disposed ) + { + lcl_revokeMapModificationListener( m_rMapData, *this ); + m_disposed = true; + } + } + + // noncopyable + MapEnumerator(const MapEnumerator&) = delete; + const MapEnumerator& operator=(const MapEnumerator&) = delete; + + // XEnumeration equivalents + bool hasMoreElements(); + Any nextElement(); + + /// called when the map was modified + void mapModified(); + + private: + ::cppu::OWeakObject& m_rParent; + MapData& m_rMapData; + const EnumerationType m_eType; + KeyedValues::const_iterator m_mapPos; + bool m_disposed; + }; + + } + + static void lcl_notifyMapDataListeners_nothrow( const MapData& _mapData ) + { + for ( MapEnumerator* loop : _mapData.m_aModListeners ) + { + loop->mapModified(); + } + } + + typedef ::cppu::WeakImplHelper < XEnumeration + > MapEnumeration_Base; + + namespace { + + class MapEnumeration :public ComponentBase + ,public MapEnumeration_Base + { + public: + MapEnumeration( ::cppu::OWeakObject& _parentMap, MapData& _mapData, ::cppu::OBroadcastHelper& _rBHelper, + const EnumerationType _type, const bool _isolated ) + :ComponentBase( _rBHelper, ComponentBase::NoInitializationNeeded() ) + ,m_xKeepMapAlive( _parentMap ) + ,m_pMapDataCopy( _isolated ? new MapData( _mapData ) : nullptr ) + ,m_aEnumerator( *this, _isolated ? *m_pMapDataCopy : _mapData, _type ) + { + } + + // XEnumeration + virtual sal_Bool SAL_CALL hasMoreElements( ) override; + virtual Any SAL_CALL nextElement( ) override; + + protected: + virtual ~MapEnumeration() override + { + acquire(); + { + ::osl::MutexGuard aGuard( getMutex() ); + m_aEnumerator.dispose(); + m_pMapDataCopy.reset(); + } + } + + private: + // since we share our mutex with the main map, we need to keep it alive as long as we live + Reference< XInterface > m_xKeepMapAlive; + std::unique_ptr< MapData > m_pMapDataCopy; + MapEnumerator m_aEnumerator; + }; + + } + + EnumerableMap::EnumerableMap() + :Map_IFace( m_aMutex ) + ,ComponentBase( Map_IFace::rBHelper ) + { + } + + + EnumerableMap::~EnumerableMap() + { + if ( !impl_isDisposed() ) + { + acquire(); + dispose(); + } + } + + + void SAL_CALL EnumerableMap::initialize( const Sequence< Any >& _arguments ) + { + ComponentMethodGuard aGuard( *this, ComponentMethodGuard::MethodType::WithoutInit ); + if ( impl_isInitialized_nothrow() ) + throw AlreadyInitializedException(); + + sal_Int32 nArgumentCount = _arguments.getLength(); + if ( ( nArgumentCount != 2 ) && ( nArgumentCount != 3 ) ) + throw IllegalArgumentException("wrong number of args", static_cast<cppu::OWeakObject*>(this), 1); + + Type aKeyType, aValueType; + if ( !( _arguments[0] >>= aKeyType ) ) + throw IllegalArgumentException("com.sun.star.uno.Type expected.", *this, 1 ); + if ( !( _arguments[1] >>= aValueType ) ) + throw IllegalArgumentException("com.sun.star.uno.Type expected.", *this, 2 ); + + Sequence< Pair< Any, Any > > aInitialValues; + bool bMutable = true; + if ( nArgumentCount == 3 ) + { + if ( !( _arguments[2] >>= aInitialValues ) ) + throw IllegalArgumentException("[]com.sun.star.beans.Pair<any,any> expected.", *this, 2 ); + bMutable = false; + } + + // for the value, anything is allowed, except VOID + if ( ( aValueType.getTypeClass() == TypeClass_VOID ) || ( aValueType.getTypeClass() == TypeClass_UNKNOWN ) ) + throw IllegalTypeException("Unsupported value type.", *this ); + + // create the comparator for the KeyType, and throw if the type is not supported + std::unique_ptr< IKeyPredicateLess > pComparator( getStandardLessPredicate( aKeyType, nullptr ) ); + if (!pComparator) + throw IllegalTypeException("Unsupported key type.", *this ); + + // init members + m_aData.m_aKeyType = aKeyType; + m_aData.m_aValueType = aValueType; + m_aData.m_pKeyCompare = std::move(pComparator); + m_aData.m_pValues.emplace( *m_aData.m_pKeyCompare ); + m_aData.m_bMutable = bMutable; + + if ( aInitialValues.hasElements() ) + impl_initValues_throw( aInitialValues ); + + setInitialized(); + } + + + void EnumerableMap::impl_initValues_throw( const Sequence< Pair< Any, Any > >& _initialValues ) + { + OSL_PRECOND( m_aData.m_pValues && m_aData.m_pValues->empty(), "EnumerableMap::impl_initValues_throw: illegal call!" ); + if (!m_aData.m_pValues || !m_aData.m_pValues->empty()) + throw RuntimeException(); + + const Pair< Any, Any >* mapping = _initialValues.getConstArray(); + const Pair< Any, Any >* mappingEnd = mapping + _initialValues.getLength(); + for ( ; mapping != mappingEnd; ++mapping ) + { + impl_checkValue_throw( mapping->Second ); + (*m_aData.m_pValues)[ mapping->First ] = mapping->Second; + } + } + + + void EnumerableMap::impl_checkValue_throw( const Any& _value ) const + { + if ( !_value.hasValue() ) + // nothing to do, NULL values are always allowed, regardless of the ValueType + return; + + TypeClass eAllowedTypeClass = m_aData.m_aValueType.getTypeClass(); + bool bValid = false; + + switch ( eAllowedTypeClass ) + { + default: + bValid = ( _value.getValueTypeClass() == eAllowedTypeClass ); + break; + case TypeClass_ANY: + bValid = true; + break; + case TypeClass_INTERFACE: + { + // special treatment: _value might contain the proper type, but the interface + // might actually be NULL. Which is still valid ... + if ( m_aData.m_aValueType.isAssignableFrom( _value.getValueType() ) ) + // this also catches the special case where XFoo is our value type, + // and _value contains a NULL-reference to XFoo, or a derived type + bValid = true; + else + { + Reference< XInterface > xValue( _value, UNO_QUERY ); + if ( xValue.is() ) + // XInterface is not-NULL, but is X(ValueType) not-NULL, too? + xValue.set( xValue->queryInterface( m_aData.m_aValueType ), UNO_QUERY ); + bValid = xValue.is(); + } + } + break; + case TypeClass_EXCEPTION: + case TypeClass_STRUCT: + { + // values are accepted if and only if their type equals, or is derived from, our value type + + if ( _value.getValueTypeClass() != eAllowedTypeClass ) + bValid = false; + else + { + const TypeDescription aValueTypeDesc( _value.getValueType() ); + const TypeDescription aRequiredTypeDesc( m_aData.m_aValueType ); + + const _typelib_CompoundTypeDescription* pValueCompoundTypeDesc = + reinterpret_cast< const _typelib_CompoundTypeDescription* >( aValueTypeDesc.get() ); + + while ( pValueCompoundTypeDesc ) + { + if ( typelib_typedescription_equals( &pValueCompoundTypeDesc->aBase, aRequiredTypeDesc.get() ) ) + break; + pValueCompoundTypeDesc = pValueCompoundTypeDesc->pBaseTypeDescription; + } + bValid = ( pValueCompoundTypeDesc != nullptr ); + } + } + break; + } + + if ( !bValid ) + { + throw IllegalTypeException( + "Incompatible value type. Found '" + _value.getValueTypeName() + + "', where '" + m_aData.m_aValueType.getTypeName() + + "' (or compatible type) is expected.", + *const_cast< EnumerableMap* >( this ) ); + } + + impl_checkNaN_throw( _value, m_aData.m_aValueType ); + } + + + void EnumerableMap::impl_checkNaN_throw( const Any& _keyOrValue, const Type& _keyOrValueType ) const + { + if ( ( _keyOrValueType.getTypeClass() == TypeClass_DOUBLE ) + || ( _keyOrValueType.getTypeClass() == TypeClass_FLOAT ) + ) + { + double nValue(0); + if ( _keyOrValue >>= nValue ) + if ( std::isnan( nValue ) ) + throw IllegalArgumentException( + "NaN (not-a-number) not supported by this implementation.", + *const_cast< EnumerableMap* >( this ), 0 ); + // (note that the case of _key not containing a float/double value is handled in the + // respective IKeyPredicateLess implementation, so there's no need to handle this here.) + } + } + + + void EnumerableMap::impl_checkKey_throw( const Any& _key ) const + { + if ( !_key.hasValue() ) + throw IllegalArgumentException( + "NULL keys not supported by this implementation.", + *const_cast< EnumerableMap* >( this ), 0 ); + + impl_checkNaN_throw( _key, m_aData.m_aKeyType ); + } + + + void EnumerableMap::impl_checkMutable_throw() const + { + if ( !m_aData.m_bMutable ) + throw NoSupportException( + "The map is immutable.", + *const_cast< EnumerableMap* >( this ) ); + } + + + Reference< XEnumeration > SAL_CALL EnumerableMap::createKeyEnumeration( sal_Bool Isolated ) + { + ComponentMethodGuard aGuard( *this ); + return new MapEnumeration( *this, m_aData, getBroadcastHelper(), eKeys, Isolated ); + } + + + Reference< XEnumeration > SAL_CALL EnumerableMap::createValueEnumeration( sal_Bool Isolated ) + { + ComponentMethodGuard aGuard( *this ); + return new MapEnumeration( *this, m_aData, getBroadcastHelper(), eValues, Isolated ); + } + + + Reference< XEnumeration > SAL_CALL EnumerableMap::createElementEnumeration( sal_Bool Isolated ) + { + ComponentMethodGuard aGuard( *this ); + return new MapEnumeration( *this, m_aData, getBroadcastHelper(), eBoth, Isolated ); + } + + + Type SAL_CALL EnumerableMap::getKeyType() + { + ComponentMethodGuard aGuard( *this ); + return m_aData.m_aKeyType; + } + + + Type SAL_CALL EnumerableMap::getValueType() + { + ComponentMethodGuard aGuard( *this ); + return m_aData.m_aValueType; + } + + + void SAL_CALL EnumerableMap::clear( ) + { + ComponentMethodGuard aGuard( *this ); + impl_checkMutable_throw(); + + m_aData.m_pValues->clear(); + + lcl_notifyMapDataListeners_nothrow( m_aData ); + } + + + sal_Bool SAL_CALL EnumerableMap::containsKey( const Any& _key ) + { + ComponentMethodGuard aGuard( *this ); + impl_checkKey_throw( _key ); + + KeyedValues::const_iterator pos = m_aData.m_pValues->find( _key ); + return ( pos != m_aData.m_pValues->end() ); + } + + + sal_Bool SAL_CALL EnumerableMap::containsValue( const Any& _value ) + { + ComponentMethodGuard aGuard( *this ); + impl_checkValue_throw( _value ); + for (auto const& value : *m_aData.m_pValues) + { + if ( value.second == _value ) + return true; + } + return false; + } + + + Any SAL_CALL EnumerableMap::get( const Any& _key ) + { + ComponentMethodGuard aGuard( *this ); + impl_checkKey_throw( _key ); + + KeyedValues::const_iterator pos = m_aData.m_pValues->find( _key ); + if ( pos == m_aData.m_pValues->end() ) + throw NoSuchElementException( anyToString( _key ), *this ); + + return pos->second; + } + + + Any SAL_CALL EnumerableMap::put( const Any& _key, const Any& _value ) + { + ComponentMethodGuard aGuard( *this ); + impl_checkMutable_throw(); + impl_checkKey_throw( _key ); + impl_checkValue_throw( _value ); + + Any previousValue; + + KeyedValues::iterator pos = m_aData.m_pValues->find( _key ); + if ( pos != m_aData.m_pValues->end() ) + { + previousValue = pos->second; + pos->second = _value; + } + else + { + (*m_aData.m_pValues)[ _key ] = _value; + } + + lcl_notifyMapDataListeners_nothrow( m_aData ); + + return previousValue; + } + + + Any SAL_CALL EnumerableMap::remove( const Any& _key ) + { + ComponentMethodGuard aGuard( *this ); + impl_checkMutable_throw(); + impl_checkKey_throw( _key ); + + Any previousValue; + + KeyedValues::iterator pos = m_aData.m_pValues->find( _key ); + if ( pos != m_aData.m_pValues->end() ) + { + previousValue = pos->second; + m_aData.m_pValues->erase( pos ); + } + + lcl_notifyMapDataListeners_nothrow( m_aData ); + + return previousValue; + } + + + Type SAL_CALL EnumerableMap::getElementType() + { + return ::cppu::UnoType< Pair< Any, Any > >::get(); + } + + + sal_Bool SAL_CALL EnumerableMap::hasElements() + { + ComponentMethodGuard aGuard( *this ); + return m_aData.m_pValues->empty(); + } + + + OUString SAL_CALL EnumerableMap::getImplementationName( ) + { + return "org.openoffice.comp.comphelper.EnumerableMap"; + } + + sal_Bool SAL_CALL EnumerableMap::supportsService( const OUString& _serviceName ) + { + return cppu::supportsService(this, _serviceName); + } + + + Sequence< OUString > SAL_CALL EnumerableMap::getSupportedServiceNames( ) + { + return { "com.sun.star.container.EnumerableMap" }; + } + + bool MapEnumerator::hasMoreElements() + { + if ( m_disposed ) + throw DisposedException( OUString(), m_rParent ); + return m_mapPos != m_rMapData.m_pValues->end(); + } + + + Any MapEnumerator::nextElement() + { + if ( m_disposed ) + throw DisposedException( OUString(), m_rParent ); + if ( m_mapPos == m_rMapData.m_pValues->end() ) + throw NoSuchElementException("No more elements.", m_rParent ); + + Any aNextElement; + switch ( m_eType ) + { + case eKeys: aNextElement = m_mapPos->first; break; + case eValues: aNextElement = m_mapPos->second; break; + case eBoth: aNextElement <<= Pair< Any, Any >( m_mapPos->first, m_mapPos->second ); break; + } + ++m_mapPos; + return aNextElement; + } + + + void MapEnumerator::mapModified() + { + m_disposed = true; + } + + + sal_Bool SAL_CALL MapEnumeration::hasMoreElements( ) + { + ComponentMethodGuard aGuard( *this ); + return m_aEnumerator.hasMoreElements(); + } + + + Any SAL_CALL MapEnumeration::nextElement( ) + { + ComponentMethodGuard aGuard( *this ); + return m_aEnumerator.nextElement(); + } + + +} // namespace comphelper + + +extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface* +org_openoffice_comp_comphelper_EnumerableMap( + css::uno::XComponentContext*, css::uno::Sequence<css::uno::Any> const&) +{ + return cppu::acquire(new comphelper::EnumerableMap()); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |