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.evaluator.impl; 020 021import java.util.Iterator; 022import java.util.List; 023 024import lucee.transformer.bytecode.Body; 025import lucee.transformer.bytecode.Statement; 026import lucee.transformer.bytecode.statement.tag.Tag; 027import lucee.transformer.bytecode.util.ASMUtil; 028import lucee.transformer.cfml.evaluator.EvaluatorException; 029import lucee.transformer.cfml.evaluator.EvaluatorSupport; 030 031import org.w3c.dom.Element; 032 033/** 034 * Prueft den Kontext des Tag <code>try</code>. 035 * Innerhalb des Tag try muss sich am Schluss 1 bis n Tags vom Typ catch befinden. 036 */ 037public final class Try extends EvaluatorSupport { 038 039 /** 040 * @see lucee.transformer.cfml.evaluator.EvaluatorSupport#evaluate(Element) 041 */ 042 public void evaluate(Tag tag) throws EvaluatorException { 043 Body body=tag.getBody(); 044 int catchCount=0; 045 int noCatchCount=0; 046 int finallyCount=0; 047 048 // count catch tag and other in body 049 if(body!=null) { 050 List stats = body.getStatements(); 051 Iterator it = stats.iterator(); 052 Statement stat; 053 Tag t; 054 String name; 055 while(it.hasNext()) { 056 stat=(Statement) it.next(); 057 if(stat instanceof Tag) { 058 t=(Tag) stat; 059 name=t.getTagLibTag().getName(); 060 if(name.equals("finally")) { 061 finallyCount++; 062 noCatchCount++; 063 } 064 else if(name.equals("catch"))catchCount++; 065 else noCatchCount++; 066 } 067 else noCatchCount++; 068 } 069 } 070 // check if has Content 071 if(catchCount==0 && finallyCount==0) 072 throw new EvaluatorException("Wrong Context, tag cftry must have at least one tag cfcatch inside or a cffinally tag."); 073 if(finallyCount>1) 074 throw new EvaluatorException("Wrong Context, tag cftry can have only one tag cffinally inside."); 075 // check if no has Content 076 if(noCatchCount==0) { 077 ASMUtil.remove(tag); 078 } 079 080 } 081}