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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/CORBA/NamingService/NameComponentComparator.java | |
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Diffstat (limited to 'libjava/classpath/gnu/CORBA/NamingService/NameComponentComparator.java')
-rw-r--r-- | libjava/classpath/gnu/CORBA/NamingService/NameComponentComparator.java | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/CORBA/NamingService/NameComponentComparator.java b/libjava/classpath/gnu/CORBA/NamingService/NameComponentComparator.java new file mode 100644 index 000000000..6116ba94e --- /dev/null +++ b/libjava/classpath/gnu/CORBA/NamingService/NameComponentComparator.java @@ -0,0 +1,98 @@ +/* NameComponentComparator.java -- + Copyright (C) 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.CORBA.NamingService; + +import org.omg.CORBA.BAD_PARAM; +import org.omg.CosNaming.NameComponent; + +import java.util.Comparator; + +/** + * This class implements the name component comparator, needed to + * sort and compare the name components in maps and sorted sets. + * + * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) + */ +public final class NameComponentComparator + implements Comparator +{ + /** + * The singleton instance of the name comparator. + */ + public static final NameComponentComparator singleton = new NameComponentComparator(); + + /** + * It is enough to have a singleton. + */ + private NameComponentComparator() + { + } + + /** + * Compare the two names components. + * + * @param nc_a the first name component. + * @param nc_b the second name component. + * + * @return 0 if the name components are equal, non zero value + * as result of comparison otherwise. + * + * @throws BAD_PARAM if one of the components is empty or + * has {@link NameComponent#id} or {@link NameComponent#kind} + * field intialised to null. + */ + public final int compare(Object nc_a, Object nc_b) + { + NameComponent a = (NameComponent) nc_a; + NameComponent b = (NameComponent) nc_b; + + int cn = a.id.compareTo(b.id); + if (cn != 0) + return cn; + return a.kind.compareTo(b.kind); + } + + /** + * All instances of this class are equal. + */ + public boolean equals(Object x) + { + return x instanceof NameComponentComparator; + } +} |