package railo.transformer.cfml.attributes.impl;
import railo.transformer.bytecode.cast.CastBoolean;
import railo.transformer.bytecode.expression.Expression;
import railo.transformer.bytecode.literal.LitBoolean;
import railo.transformer.bytecode.statement.tag.Attribute;
import railo.transformer.bytecode.statement.tag.Tag;
import railo.transformer.cfml.attributes.AttributeEvaluator;
import railo.transformer.cfml.attributes.AttributeEvaluatorException;
import railo.transformer.library.tag.TagLibTag;
/**
* Attribute Evaluator for the tag Function
*/
public final class Function implements AttributeEvaluator {
/**
* @see railo.transformer.cfml.attributes.AttributeEvaluator#evaluate(railo.transformer.library.tag.TagLibTag, org.w3c.dom.Element)
*/
public TagLibTag evaluate( TagLibTag tagLibTag, Tag tag) throws AttributeEvaluatorException {
tagLibTag.setParseBody(false);
Attribute attrOutput = tag.getAttribute("output");
if(attrOutput==null) return tagLibTag;
Expression expr = CastBoolean.toExprBoolean(attrOutput.getValue());
if(!(expr instanceof LitBoolean))
throw new AttributeEvaluatorException("Attribute output of the Tag Function, must be a literal boolean value (true or false)");
boolean output = ((LitBoolean)expr).getBooleanValue();
if(output)
tagLibTag.setParseBody(true);
return tagLibTag;
}
}