package railo.transformer.cfml.evaluator.impl;
import java.util.Iterator;
import java.util.List;
import org.w3c.dom.Element;
import railo.transformer.bytecode.Body;
import railo.transformer.bytecode.Statement;
import railo.transformer.bytecode.statement.tag.Tag;
import railo.transformer.bytecode.util.ASMUtil;
import railo.transformer.cfml.evaluator.EvaluatorException;
import railo.transformer.cfml.evaluator.EvaluatorSupport;
/**
* Prueft den Kontext des Tag <code>try</code>.
* Innerhalb des Tag try muss sich am Schluss 1 bis n Tags vom Typ catch befinden.
*/
public final class Try extends EvaluatorSupport {
/**
* @see railo.transformer.cfml.evaluator.EvaluatorSupport#evaluate(Element)
*/
public void evaluate(Tag tag) throws EvaluatorException {
Body body=tag.getBody();
int catchCount=0;
int noCatchCount=0;
int finallyCount=0;
// count catch tag and other in body
if(body!=null) {
List stats = body.getStatements();
Iterator it = stats.iterator();
Statement stat;
Tag t;
String name;
while(it.hasNext()) {
stat=(Statement) it.next();
if(stat instanceof Tag) {
t=(Tag) stat;
name=t.getTagLibTag().getName();
if(name.equals("finally")) {
finallyCount++;
noCatchCount++;
}
else if(name.equals("catch"))catchCount++;
else noCatchCount++;
}
else noCatchCount++;
}
}
// check if has Content
if(catchCount==0 && finallyCount==0)
throw new EvaluatorException("Wrong Context, tag cftry must have at least one tag cfcatch inside or a cffinally tag.");
if(finallyCount>1)
throw new EvaluatorException("Wrong Context, tag cftry can have only one tag cffinally inside.");
// check if no has Content
if(noCatchCount==0) {
ASMUtil.remove(tag);
}
}
}