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

There is a newer version: 1.4.2

/* 
 * 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 org.rythmengine.internal.parser.build_in;

import com.stevesoft.pat.Regex;
import org.rythmengine.internal.IContext;
import org.rythmengine.internal.IParser;
import org.rythmengine.internal.Keyword;
import org.rythmengine.internal.Token;
import org.rythmengine.internal.parser.CodeToken;
import org.rythmengine.internal.parser.RemoveLeadingLineBreakAndSpacesParser;
import org.rythmengine.utils.S;

public class ContinueParser extends KeywordParserFactory {

    private static final String R = "^(\\n?[ \\t\\x0B\\f]*%s%s\\s*((?@()))?[\\s;]*)";

    public ContinueParser() {
    }

    protected String patternStr() {
        return R;
    }

    public IParser create(IContext c) {
        return new RemoveLeadingLineBreakAndSpacesParser(c) {
            public Token go() {
                Regex r = reg(dialect());
                if (r.search(remain())) {
                    step(r.stringMatched().length());
                    String condition = r.stringMatched(2);
                    if (null != condition) {
                        condition = S.stripBrace(condition);
                    }
                    IContext.Continue c = ctx().peekContinue();
                    if (null == c) raiseParseException("Bad @continue statement: No loop context");
                    if (S.notEmpty(condition)) {
                        return new IfThenToken(condition, "continue", ctx());
                    } else {
                        return new CodeToken(c.getStatement(), ctx());
                    }
                }
                raiseParseException("Bad @continue statement. Correct usage: @continue()");
                return null;
            }
        };
    }

    @Override
    public Keyword keyword() {
        return Keyword.CONTINUE;
    }

}