/**
*
* Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
**/
package lucee.transformer.cfml.evaluator.impl;
import lucee.transformer.bytecode.statement.tag.Tag;
import lucee.transformer.bytecode.statement.tag.TagIf;
import lucee.transformer.bytecode.util.ASMUtil;
import lucee.transformer.cfml.evaluator.EvaluatorException;
import lucee.transformer.cfml.evaluator.EvaluatorSupport;
import lucee.transformer.library.tag.TagLibTag;
/**
*
* Prueft den Kontext des Tag else.
* Das Tag <code>else</code> darf nur direkt innerhalb des Tag <code>if</code> liegen.
* Dem Tag <code>else</code> darf, innerhalb des Tag <code>if</code>, kein Tag <code>if</code> nachgestellt sein.
* Das Tag darf auch nur einmal vorkommen innerhalb des Tag if.
*/
public final class Else extends EvaluatorSupport {
@Override
public void evaluate(Tag tag, TagLibTag libTag) throws EvaluatorException {
String ns=libTag.getTagLib().getNameSpaceAndSeparator();
String ifName=ns+"if";
// check if tag is direct inside if
if(!ASMUtil.isParentTag(tag, TagIf.class)) {
throw new EvaluatorException("Wrong Context, tag "+libTag.getFullName()+" must be direct inside a "+ifName+" tag");
}
// check if is there a elseif tag after this tag
if(ASMUtil.hasSisterTagAfter(tag,"elseif"))
throw new EvaluatorException("Wrong Context, tag cfelseif can't be after tag else");
// check if tag else is unique
if(ASMUtil.hasSisterTagWithSameName(tag))
throw new EvaluatorException("Wrong Context, tag else must be once inside the tag if");
}
}