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akonadi

attributefactory.cpp
00001 /*
00002     Copyright (c) 2007 - 2008 Volker Krause <vkrause@kde.org>
00003 
00004     This library is free software; you can redistribute it and/or modify it
00005     under the terms of the GNU Library General Public License as published by
00006     the Free Software Foundation; either version 2 of the License, or (at your
00007     option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful, but WITHOUT
00010     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00011     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
00012     License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public License
00015     along with this library; see the file COPYING.LIB.  If not, write to the
00016     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00017     02110-1301, USA.
00018 */
00019 
00020 #include "attributefactory.h"
00021 
00022 #include "collectionquotaattribute.h"
00023 #include "collectionrightsattribute_p.h"
00024 #include "entitydisplayattribute.h"
00025 #include "entityhiddenattribute.h"
00026 #include "indexpolicyattribute.h"
00027 #include "persistentsearchattribute.h"
00028 
00029 #include <KGlobal>
00030 
00031 #include <QtCore/QHash>
00032 
00033 using namespace Akonadi;
00034 
00035 namespace Akonadi {
00036 namespace Internal {
00037 
00041 class DefaultAttribute : public Attribute
00042 {
00043   public:
00044     explicit DefaultAttribute( const QByteArray &type, const QByteArray &value = QByteArray() ) :
00045       mType( type ),
00046       mValue( value )
00047     {}
00048 
00049     QByteArray type() const { return mType; }
00050     Attribute* clone() const
00051     {
00052       return new DefaultAttribute( mType, mValue );
00053     }
00054 
00055     QByteArray serialized() const { return mValue; }
00056     void deserialize( const QByteArray &data ) { mValue = data; }
00057 
00058   private:
00059     QByteArray mType, mValue;
00060 };
00061 
00065 class StaticAttributeFactory : public AttributeFactory
00066 {
00067   public:
00068     StaticAttributeFactory() : AttributeFactory(), initialized( false ) {}
00069     void init() {
00070       if ( initialized )
00071         return;
00072       initialized = true;
00073 
00074       // Register built-in attributes
00075       AttributeFactory::registerAttribute<CollectionQuotaAttribute>();
00076       AttributeFactory::registerAttribute<CollectionRightsAttribute>();
00077       AttributeFactory::registerAttribute<EntityDisplayAttribute>();
00078       AttributeFactory::registerAttribute<EntityHiddenAttribute>();
00079       AttributeFactory::registerAttribute<IndexPolicyAttribute>();
00080       AttributeFactory::registerAttribute<PersistentSearchAttribute>();
00081     }
00082     bool initialized;
00083 };
00084 
00085 K_GLOBAL_STATIC( StaticAttributeFactory, s_attributeInstance )
00086 
00087 }
00088 
00089 using Akonadi::Internal::s_attributeInstance;
00090 
00094 class AttributeFactory::Private
00095 {
00096   public:
00097     QHash<QByteArray, Attribute*> attributes;
00098 };
00099 
00100 
00101 AttributeFactory* AttributeFactory::self()
00102 {
00103   s_attributeInstance->init();
00104   return s_attributeInstance;
00105 }
00106 
00107 AttributeFactory::AttributeFactory()
00108   : d( new Private )
00109 {
00110 }
00111 
00112 AttributeFactory::~ AttributeFactory()
00113 {
00114   qDeleteAll( d->attributes );
00115   delete d;
00116 }
00117 
00118 void AttributeFactory::registerAttribute(Attribute *attr)
00119 {
00120   Q_ASSERT( attr );
00121   Q_ASSERT( !attr->type().contains(' ') && !attr->type().contains('\'') && !attr->type().contains('"') );
00122   QHash<QByteArray, Attribute*>::Iterator it = d->attributes.find( attr->type() );
00123   if ( it != d->attributes.end() ) {
00124     delete *it;
00125     d->attributes.erase( it );
00126   }
00127   d->attributes.insert( attr->type(), attr );
00128 }
00129 
00130 Attribute* AttributeFactory::createAttribute(const QByteArray &type)
00131 {
00132   Attribute* attr = self()->d->attributes.value( type );
00133   if ( attr )
00134     return attr->clone();
00135   return new Internal::DefaultAttribute( type );
00136 }
00137 
00138 }
00139 

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