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| org.apache.commons.jelly.tags.core.BreakTag |
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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.TagSupport; |
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| 19 | import org.apache.commons.jelly.XMLOutput; |
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| 20 | import org.apache.commons.jelly.impl.BreakException; |
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| 21 | import org.apache.commons.jelly.expression.Expression; |
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| 22 | ||
| 23 | /** |
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| 24 | * A tag which terminates the execution of the current <forEach> or ≶while> |
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| 25 | * loop. This tag can take an optional boolean test attribute which if its true |
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| 26 | * then the break occurs otherwise the loop continues processing. |
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| 27 | * |
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| 28 | * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
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| 29 | * @version $Revision: 155420 $ |
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| 30 | */ |
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| 31 | public class BreakTag extends TagSupport { |
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| 32 | ||
| 33 | /** The expression to evaluate. */ |
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| 34 | private Expression test; |
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| 35 | ||
| 36 | /** |
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| 37 | * If specified, the given variable will hold a true/false value |
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| 38 | * indicating if the loop was broken. |
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| 39 | */ |
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| 40 | private String var; |
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| 41 | ||
| 42 | 260 | public BreakTag() { |
| 43 | 260 | } |
| 44 | ||
| 45 | // Tag interface |
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| 46 | //------------------------------------------------------------------------- |
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| 47 | public void doTag(XMLOutput output) throws BreakException { |
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| 48 | 1209 | boolean broken = false; |
| 49 | 1209 | if (test == null || test.evaluateAsBoolean(context)) { |
| 50 | 208 | broken = true; |
| 51 | } |
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| 52 | 1209 | if ( var != null ) { |
| 53 | 780 | context.setVariable( this.var, String.valueOf(broken)); |
| 54 | } |
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| 55 | 1209 | if ( broken ) { |
| 56 | 208 | throw new BreakException(); |
| 57 | } |
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| 58 | 1001 | } |
| 59 | ||
| 60 | /** |
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| 61 | * Sets the Jelly expression to evaluate (optional). |
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| 62 | * If this is <code>null</code> or evaluates to |
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| 63 | * <code>true</code> then the loop is terminated |
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| 64 | * |
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| 65 | * @param test the Jelly expression to evaluate |
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| 66 | */ |
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| 67 | public void setTest(Expression test) { |
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| 68 | 1131 | this.test = test; |
| 69 | 1131 | } |
| 70 | ||
| 71 | /** |
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| 72 | * Sets the variable name to export indicating if the item was broken |
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| 73 | * @param var name of the variable to be exported |
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| 74 | */ |
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| 75 | public void setVar(String var) { |
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| 76 | 780 | this.var = class="keyword">var; |
| 77 | 780 | } |
| 78 | ||
| 79 | } |
| This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |