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org.apache.commons.jelly.tags.core.CatchTag |
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1 | /* |
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2 | * Copyright 2002,2004 The Apache Software Foundation. |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | package org.apache.commons.jelly.tags.core; |
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17 | ||
18 | import org.apache.commons.jelly.JellyTagException; |
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19 | import org.apache.commons.jelly.TagSupport; |
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20 | import org.apache.commons.jelly.XMLOutput; |
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21 | ||
22 | /** |
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23 | * A tag which catches exceptions thrown by its body. |
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24 | * This allows conditional logic to be performed based on if exceptions |
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25 | * are thrown or to do some kind of custom exception logging logic. |
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26 | * |
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27 | * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
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28 | * @version $Revision: 155420 $ |
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29 | */ |
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30 | public class CatchTag extends TagSupport { |
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31 | ||
32 | private String var; |
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33 | ||
34 | 65 | public CatchTag() { |
35 | 65 | } |
36 | ||
37 | // Tag interface |
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38 | //------------------------------------------------------------------------- |
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39 | public void doTag(XMLOutput output) throws JellyTagException { |
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40 | 65 | if (var != null) { |
41 | 65 | context.removeVariable(var); |
42 | } |
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43 | try { |
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44 | 65 | invokeBody(output); |
45 | } |
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46 | 39 | catch (Throwable t) { |
47 | 39 | if (var != null) { |
48 | 39 | context.setVariable(var, t); |
49 | } |
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50 | 26 | } |
51 | 65 | } |
52 | ||
53 | // Properties |
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54 | //------------------------------------------------------------------------- |
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55 | ||
56 | /** |
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57 | * Sets the name of the variable which is exposed with the Exception that gets |
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58 | * thrown by evaluating the body of this tag or which is set to null if there is |
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59 | * no exception thrown. |
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60 | */ |
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61 | public void setVar(String var) { |
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62 | 65 | this.var = class="keyword">var; |
63 | 65 | } |
64 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |