# TopicComparator.java

    /*
     * Copyright (C) 2000 - 2026 Silverpeas
     *
     * This program is free software: you can redistribute it and/or modify
     * it under the terms of the GNU Affero General Public License as
     * published by the Free Software Foundation, either version 3 of the
     * License, or (at your option) any later version.
     *
     * As a special exception to the terms and conditions of version 3.0 of
     * the GPL, you may redistribute this Program in connection with Free/Libre
     * Open Source Software ("FLOSS") applications as described in Silverpeas's
     * FLOSS exception.  You should have received a copy of the text describing
     * the FLOSS exception, and it is also available here:
     * "http://www.silverpeas.org/docs/core/legal/floss_exception.html"
     *
     * This program 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 Affero General Public License for more details.
     *
     * You should have received a copy of the GNU Affero General Public License
     * along with this program.  If not, see <https://www.gnu.org/licenses/>.
     */

    package org.silverpeas.components.kmelia.model;

    import org.silverpeas.core.node.model.NodeDetail;

    import java.util.Comparator;
    import java.util.HashMap;
    import java.util.Map;

    public class TopicComparator implements Comparator<NodeDetail> {

      private static final String DEFAULT_NAME = "*";

      private final boolean useCriteria;
      private Map<String, Integer> namesWeights;

      public TopicComparator() {
        useCriteria = false;
      }

      public TopicComparator(String[] criteria) {
        if (criteria != null) {
          namesWeights = new HashMap<>();
          int i;
          for (i = 0; i < criteria.length; i++) {
            namesWeights.put(criteria[i].toLowerCase(), i);
          }
          if (i > 0) {
            namesWeights.putIfAbsent(DEFAULT_NAME, i);
          }
        }
        useCriteria = (namesWeights != null && !namesWeights.isEmpty());
      }

      private Integer getNameWeight(String name) {
        return (namesWeights.containsKey(name) ? namesWeights.get(name) : namesWeights.get(DEFAULT_NAME));
      }

      @Override
      public int compare(NodeDetail node1, NodeDetail node2) {
        int result = 0;
        if (node1.isChild() && node2.isChild()) {
          String name1 = node1.getName().toLowerCase();
          String name2 = node2.getName().toLowerCase();
          if (useCriteria) {
            result = getNameWeight(name1).compareTo(getNameWeight(name2));
          }
          if (result == 0) {
            result = name1.compareTo(name2);
          }
        }
        return result;
      }

    }