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A strong typed high performance Java Template engine with .Net Razor like syntax

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/* 
 * Copyright (C) 2013 The Rythm Engine project
 * Gelin Luo 
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 com.greenlaw110.rythm.internal.parser.build_in;

import com.greenlaw110.rythm.extension.ICodeType;
import com.greenlaw110.rythm.internal.IContext;
import com.greenlaw110.rythm.internal.Token;
import com.greenlaw110.rythm.internal.parser.RemoveLeadingLineBreakAndSpacesParser;
import com.greenlaw110.rythm.logger.ILogger;
import com.greenlaw110.rythm.logger.Logger;
import com.greenlaw110.rythm.utils.S;
import com.greenlaw110.rythm.utils.TextBuilder;

import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Detect if a directive comment is reached and strip
 * it out from the parsing process
 * 
 * 
For example when <!-- @> is found the
 * <!-- should be stripped out
 */
public class DirectiveCommentStartSensor extends RemoveLeadingLineBreakAndSpacesParser {
    ILogger logger = Logger.get(DirectiveCommentStartSensor.class);

    public DirectiveCommentStartSensor(IContext context) {
        super(context);
    }

    private static Map patterns = new HashMap();

    @Override
    public TextBuilder go() {
        IContext ctx = ctx();
        if (ctx.insideDirectiveComment()) {
            return null;
            //raiseParseException("directive comment not closed");
        }
        ICodeType type = ctx.peekCodeType();
        while (null != type) {
            String sCommentStart = type.commentStart();
            if (!S.empty(sCommentStart)) {
                sCommentStart = S.escapeRegex(sCommentStart).toString();
                // try