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75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
/*
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This file is part of libkdepim.
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Copyright (c) 2005 Ingo Kloecker <kloecker@kde.org>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef __KMIME_KAUTODELETEHASH__
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#define __KMIME_KAUTODELETEHASH__
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#include <QtCore/QHash>
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namespace KMime {
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/**
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* The KAutoDeleteHash class is a convenience QHash subclass that provides
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* automatic deletion of the values in the destructor. Apart from this
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* KAutoDeleteHash behaves exactly like QHash<Key, T *>.
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*
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* Since the automatic deletion is restricted to the destruction of the hash
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* you have take care of the deletion of values you remove or replace yourself.
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* To replace a value in the hash by another value use
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* @code
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* delete hash.take( key );
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* hash.insert( key, value );
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* @endcode
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* and to remove a value from the hash use
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* @code
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* delete hash.take( key );
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* @endcode
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*
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* @author Ingo Klöcker \<kloecker@kde.org\>
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*/
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template <class Key, class T>
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class KAutoDeleteHash : public QHash<Key, T *>
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{
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public:
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/**
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* Constructs an empty hash.
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*/
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KAutoDeleteHash() {}
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/**
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* Constructs a copy of @p other (which can be a QHash or a KAutoDeleteHash).
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*/
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KAutoDeleteHash( const QHash<Key, T *> &other ) : QHash<Key, T *>( other ) {}
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/**
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* Destroys the hash and deletes all values. References to the values in the
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* hash and all iterators of this hash become invalid.
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*/
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~KAutoDeleteHash() { while ( ! QHash<Key, T *>::isEmpty() ) {
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T *value = *QHash<Key, T *>::begin();
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this->erase( QHash<Key, T *>::begin() );
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delete value;
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}
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}
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};
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} // namespace KMime
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#endif /* __KMIME_KAUTODELETEHASH__ */
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