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/* |
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$Id$ |
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Copyright (C) 2006 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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|
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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; |
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import java.io.Serializable; |
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import java.util.Comparator; |
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import net.sf.basedb.core.Nameable; |
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/** |
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An implementation of the <code>Comparator</code> interface which uses |
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the name of {@link Nameable} items to compare the objects. If the names |
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are equal it uses the ID:s to really check if they are equal. |
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<p> |
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Note: this comparator is consistent with equals. |
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@author Nicklas |
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@version 2.0 |
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@base.modified $Date$ |
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*/ |
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public class NameableComparator<T extends Nameable> |
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implements Comparator<T>, Serializable |
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{ |
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|
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private static final long serialVersionUID = -845369301970627620L; |
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private final boolean descending; |
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/** |
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Create a new comparator. |
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@param descending TRUE to sort objects in descending order (z--a), |
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FALSE to sort the objects in ascending order (a--z) |
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*/ |
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public NameableComparator(boolean descending) |
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{ |
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this.descending = descending; |
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} |
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@Override |
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public int compare(T o1, T o2) |
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{ |
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String name1 = o1.getName(); |
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String name2 = o2.getName(); |
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int compared = name1.compareTo(name2); |
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if (compared == 0) compared = o2.getId() - o1.getId(); |
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if (descending) compared = -compared; |
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return compared; |
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} |
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|
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} |