/*
* 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 com.stevesoft.pat.Regex;
import org.rythmengine.exception.ParseException;
import org.rythmengine.internal.IBlockHandler;
import org.rythmengine.internal.IContext;
import org.rythmengine.internal.IParser;
import org.rythmengine.internal.Token;
import org.rythmengine.internal.parser.BlockCodeToken;
import org.rythmengine.internal.parser.RemoveLeadingSpacesIfLineBreakParser;
/**
* else branch for @for loop, executed in case the loop variable is empty
*
* @author luog
*/
public class ElseForParser extends CaretParserFactoryBase {
@Override
public IParser create(final IContext ctx) {
return new RemoveLeadingSpacesIfLineBreakParser(ctx) {
@Override
public Token go() {
IBlockHandler bh = ctx().currentBlock();
if (null == bh || !(bh instanceof ForEachCodeToken)) return null;
String a = dialect().a();
Regex r = new Regex(String.format("^((\\n\\r|\\r\\n|[\\n\\r])?(%s\\}?|%s?\\})\\s*(else([ \\t\\x0B\\f]*\\{?[ \\t\\x0B\\f]*\\n?))).*", a, a));
String s = ctx.getRemain();
String s1;
if (r.search(s)) {
s1 = r.stringMatched(1);
if (null == s1) return null;
step(s1.length());
//s1 = r.stringMatched(3);
} else {
return null;
}
//if (!s1.endsWith("{")) s1 = s1 + "{";
try {
ctx.closeBlock();
s1 = "\n\t}\n} else {\n";
} catch (ParseException e) {
throw new RuntimeException(e);
}
processFollowingOpenBraceAndLineBreak(false);
BlockCodeToken tk = new BlockCodeToken(s1, ctx) {
@Override
public String closeBlock() {
return "}}";
}
};
return tk;
}
};
}
}