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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. |