net.ontopia.topicmaps.nav.utils.comparators.TopicMapReferenceComparator.java Source code

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Here is the source code for net.ontopia.topicmaps.nav.utils.comparators.TopicMapReferenceComparator.java

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/*
 * #!
 * Ontopia Navigator
 * #-
 * Copyright (C) 2001 - 2013 The Ontopia Project
 * #-
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * !#
 */

package net.ontopia.topicmaps.nav.utils.comparators;

import java.util.Comparator;
import net.ontopia.topicmaps.entry.TopicMapReferenceIF;
import org.apache.commons.lang3.StringUtils;

/**
 * INTERNAL: A Comparator for ordering TopicMapReferences lexically. It
 * compares the titles of references case-insensitively.
 */
public class TopicMapReferenceComparator implements Comparator<TopicMapReferenceIF> {

    /**
     * INTERNAL: Compares two TopicMapReferenceIFs.
     */
    @Override
    public int compare(TopicMapReferenceIF tmr1, TopicMapReferenceIF tmr2) {
        String title1 = tmr1.getTitle();
        String title2 = tmr2.getTitle();
        return StringUtils.compareIgnoreCase(title1, title2);
    }

}