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/** |
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$Id$ |
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Copyright (C) 2008 Nicklas Nordborg |
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This file is part of BASE - BioArray Software Environment. |
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Available at http://base.thep.lu.se/ |
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BASE is free software; you can redistribute it and/or |
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modify it under the terms of the GNU General Public License |
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as published by the Free Software Foundation; either version 3 |
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of the License, or (at your option) any later version. |
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BASE 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 |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with BASE. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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package net.sf.basedb.util.collections; |
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import java.util.Collection; |
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/** |
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Allows a collection to be transformed by applying some operation to it. |
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The transformed items should be added to the destination collection. The |
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source collection is not allowed to be modified. Client applications |
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should NOT use the same collection as both source and destination since that |
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may interfere with iterators on the source collection. |
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The destination collection may contain elements of the same or a different type |
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as the source collection. |
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@author Nicklas |
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@version 2.10 |
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@base.modified $Date$ |
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@param <D> The element type contained in the destination collection |
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@param <S> The element type of the source collection |
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*/ |
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public interface CollectionTransformer<S, D> |
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{ |
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/** |
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Transform the source collection and store the changes in the |
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destination collection. |
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@param source The source collection |
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@param destination The destination collection |
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@return The number of elements affected in the destination collection. Note! |
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This value may have a different meaning depending on the implementor. For |
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example, some implementor may add elements while other implementor may |
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remove elements. A return value of 0 should always indicate that no modifications |
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has been made to the destination collection. |
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*/ |
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public int transform(Collection<? extends S> source, Collection<? super D> destination); |
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} |