/**
 * Copyright (c) 2005-2011 by Appcelerator, Inc. All Rights Reserved.
 * Licensed under the terms of the Eclipse Public License (EPL).
 * Please see the license.txt included with this distribution for details.
 * Any modifications to this file must keep this entire header intact.
 */
package org.python.pydev.django_templates.common.parsing.lexer;

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

public class DjangoTemplatesTokens {
    public static final short UNKNOWN = -1;
    public static final short EOF = 0;
    public static final short DJ_START = 101;
    public static final short DJ_END = 102;

    private static final short MAXIMUM = 2;
    private static final short OFFSET = 100;

    @SuppressWarnings("nls")
    private static final String[] NAMES = { "EOF", "DJ_START", "DJ_END" };
    private static final String NAME_UNKNOWN = "UNKNOWN"; //$NON-NLS-1$

    private static Map<String, Short> nameIndexMap;

    public static String getTokenName(short token) {
        init();
        token -= OFFSET;
        if (token < 0 || token > MAXIMUM) {
            return NAME_UNKNOWN;
        }
        return NAMES[token];
    }

    public static short getToken(String tokenName) {
        init();
        Short token = nameIndexMap.get(tokenName);
        return (token == null) ? UNKNOWN : token;
    }

    private static void init() {
        if (nameIndexMap == null) {
            nameIndexMap = new HashMap<String, Short>();
            short index = OFFSET;
            for (String name : NAMES) {
                nameIndexMap.put(name, index++);
            }
        }
    }

    private DjangoTemplatesTokens() {
    }
}