/*
* Copyright (C) 2013 The Rythm Engine project
* Gelin Luo <greenlaw110(at)gmail.com>
*
* 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 org.rythmengine.extension.ICodeType;
import org.rythmengine.internal.IContext;
import org.rythmengine.internal.Token;
import org.rythmengine.internal.parser.CodeToken;
import org.rythmengine.internal.parser.ParserBase;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Detect if a type block is ended put
* instruction in template java source to switch
* back type context
* <p/>
* <p>For example when </script> is reached
* a instruction <code>popCodeType()</code>
* should be put in place</p>
*/
public class CodeTypeBlockEndSensor extends ParserBase {
public CodeTypeBlockEndSensor(IContext context) {
super(context);
}
private static Map<String, Pattern> patterns = new HashMap<String, Pattern>();
@Override
public Token go() {
IContext ctx = ctx();
ICodeType curType = ctx.peekCodeType();
if (curType.allowedExternalTypes().isEmpty()) return null;
String remain = ctx.getRemain();
String blockEnd = curType.blockEnd();
if (null == blockEnd) {
logger.warn("null block end found for type[%s]", curType);
return null;
}
Pattern p = patterns.get(blockEnd);
if (null == p) {
p = Pattern.compile(blockEnd, Pattern.DOTALL);
patterns.put(blockEnd, p);
}
Matcher m = p.matcher(remain);
if (m.matches()) {
String matched = m.group(1);
ctx.step(matched.length());
ctx.popCodeType();
String s = String.format("p(\"%s\");__ctx.popCodeType();", matched, curType);
return new CodeToken(s, ctx);
}
return null;
}
}