001/** 002 * 003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved. 004 * 005 * This library is free software; you can redistribute it and/or 006 * modify it under the terms of the GNU Lesser General Public 007 * License as published by the Free Software Foundation; either 008 * version 2.1 of the License, or (at your option) any later version. 009 * 010 * This library is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013 * Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public 016 * License along with this library. If not, see <http://www.gnu.org/licenses/>. 017 * 018 **/ 019package lucee.transformer.cfml.attributes.impl; 020 021import lucee.transformer.bytecode.cast.CastBoolean; 022import lucee.transformer.bytecode.expression.Expression; 023import lucee.transformer.bytecode.literal.LitBoolean; 024import lucee.transformer.bytecode.statement.tag.Attribute; 025import lucee.transformer.bytecode.statement.tag.Tag; 026import lucee.transformer.cfml.attributes.AttributeEvaluator; 027import lucee.transformer.cfml.attributes.AttributeEvaluatorException; 028import lucee.transformer.library.tag.TagLibTag; 029 030/** 031 * Attribute Evaluator for the tag Function 032 */ 033public final class Function implements AttributeEvaluator { 034 035 /** 036 * @see lucee.transformer.cfml.attributes.AttributeEvaluator#evaluate(lucee.transformer.library.tag.TagLibTag, org.w3c.dom.Element) 037 */ 038 public TagLibTag evaluate( TagLibTag tagLibTag, Tag tag) throws AttributeEvaluatorException { 039 tagLibTag.setParseBody(false); 040 041 Attribute attrOutput = tag.getAttribute("output"); 042 if(attrOutput==null) return tagLibTag; 043 044 Expression expr = CastBoolean.toExprBoolean(attrOutput.getValue()); 045 046 if(!(expr instanceof LitBoolean)) 047 throw new AttributeEvaluatorException("Attribute output of the Tag Function, must be a literal boolean value (true or false)"); 048 boolean output = ((LitBoolean)expr).getBooleanValue(); 049 if(output) 050 tagLibTag.setParseBody(true); 051 052 return tagLibTag; 053 } 054}