KeywordMap.java

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/*
 * Gridarta MMORPG map editor for Crossfire, Daimonin and similar games.
 * Copyright (C) 2000-2023 The Gridarta Developers.
 *
 * This program 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 of the License, or
 * (at your option) any later version.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
package net.sf.gridarta.textedit.textarea.tokenmarker;
 
import javax.swing.text.Segment;
import net.sf.gridarta.textedit.textarea.Token;
 
public class KeywordMap {
 
    private final Node rootNode = new Node();
 
    private final boolean ignoreCase;
 
    public KeywordMap(final boolean ignoreCase) {
        this.ignoreCase = ignoreCase;
    }
 
    public byte lookup(final Segment text, final int offset, final int length) {
        Node node = rootNode;
        for (int i = offset, end = offset + length; i < end; i++) {
            node = node.lookup(ignoreCase ? Character.toUpperCase(text.array[i]) : text.array[i]);
            if (node == null) {
                return Token.NULL;
            }
        }
        return node.getId();
    }
 
    public void add(final CharSequence keyword, final byte id) {
        Node node = rootNode;
        for (int i = 0, len = keyword.length(); i < len; i++) {
            node = node.define(ignoreCase ? Character.toUpperCase(keyword.charAt(i)) : keyword.charAt(i));
        }
        node.setId(id);
    }
 
}