com.disney.groovity.tags.Catch Maven / Gradle / Ivy
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*
* Licensed under the Apache License, Version 2.0 (the "Apache License")
* with the following modification; you may not use this file except in
* compliance with the Apache License and the following modification to it:
* Section 6. Trademarks. is deleted and replaced with:
*
* 6. Trademarks. This License does not grant permission to use the trade
* names, trademarks, service marks, or product names of the Licensor
* and its affiliates, except as required to comply with Section 4(c) of
* the License and to reproduce the content of the NOTICE file.
*
* You may obtain a copy of the Apache License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
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package com.disney.groovity.tags;
import groovy.lang.Closure;
import java.util.Map;
import com.disney.groovity.GroovityConstants;
import com.disney.groovity.Taggable;
import com.disney.groovity.doc.Attr;
import com.disney.groovity.doc.Tag;
/**
* The tag catches any Throwable that occurs in its body and optionally exposes it. Used for error handling.
*
* catch(
* - var:
* the variable name to hold the Throwable object if thrown in the body,
*
{
* // Code to execute
* });
*
* Sample
*
* <~<g:catch var="catchException">
* <g:set var="myVar" value="${3/0}"/>
* </g:catch>
* <g:if test = "${catchException != null}">
* ${catchException}${catchException.message}
* </g:if>~>
*
*
* @author Alex Vigdor
*/
@Tag(
info = "The tag catches any Throwable that occurs in its body and optionally exposes it. Used for error handling.",
body = "Code to execute",
sample="<~\n"+
"\t\n"+
" \n"+
"\n\t${catchException}${catchException.message}\n ~>",
attrs = {
@Attr(
name = GroovityConstants.VAR,
info="the variable name to hold the Throwable object if thrown in the body",
required = false
)
}
)
public class Catch implements Taggable {
@SuppressWarnings("rawtypes")
public Object tag(Map attributes, Closure body) {
Exception ex = null;
try{
body.call();
}catch(Exception e){
ex=e;
}
Object in = resolve(attributes,VAR);
if(in != null) {
bind(body,in.toString(),ex);
}
return ex;
}
}