/*
* 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;
import org.rythmengine.internal.IContext;
import org.rythmengine.internal.IParser;
import org.rythmengine.internal.IParserFactory;
import org.rythmengine.internal.Token;
import org.rythmengine.internal.dialect.DialectBase;
import org.rythmengine.utils.F;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* BuildInParserDispatcher test remaining template content and try
* to find the build in parser which is interested to the next
* build in keyword. If one is found then the parse process is
* passed to it. Otherwise null token is returned
*
* @author luog
*/
public class ParserDispatcher extends ParserBase {
private final Pattern P;
public ParserDispatcher(IContext context) {
super(context);
P = pattern("\\n?[ \\t\\x0B\\f]*%s(%s)(\\s*|\\(|\\{).*", a(), Patterns.VarName);
}
public F.T2<IParser, Token> go2() {
DialectBase d = (DialectBase) dialect();
IContext c = ctx();
Matcher m = P.matcher(remain());
if (m.matches()) {
String s = m.group(1);
IParser p = d.createBuildInParser(s, c);
if (null != p) {
Token tb = p.go();
if (null != tb) return F.T2(p, tb);
}
}
for (IParserFactory f : d.freeParsers()) {
IParser p = f.create(c);
Token tb = p.go();
if (null != tb) return F.T2(p, tb);
}
return null;
}
public Token go() {
throw new UnsupportedOperationException();
}
}