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| org.apache.commons.jelly.tags.core.SwitchTag |
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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.MissingAttributeException; |
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| 20 | import org.apache.commons.jelly.TagSupport; |
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| 21 | import org.apache.commons.jelly.XMLOutput; |
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| 22 | import org.apache.commons.jelly.expression.Expression; |
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| 23 | ||
| 24 | ||
| 25 | /** |
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| 26 | * Executes the child <case> tag whose value equals my on attribute. |
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| 27 | * Executes a child <default> tag when present and no <case> tag has |
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| 28 | * yet matched. |
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| 29 | * |
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| 30 | * @see CaseTag |
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| 31 | * @see DefaultTag |
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| 32 | * |
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| 33 | * @author Rodney Waldhoff |
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| 34 | * @version $Revision: 155420 $ $Date: 2005-02-27 00:06:03 +1100 (Sun, 27 Feb 2005) $ |
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| 35 | */ |
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| 36 | public class SwitchTag extends TagSupport { |
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| 37 | ||
| 38 | 195 | public SwitchTag() { |
| 39 | 195 | } |
| 40 | ||
| 41 | // Tag interface |
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| 42 | //------------------------------------------------------------------------- |
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| 43 | ||
| 44 | /** |
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| 45 | * Sets the value to switch on. |
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| 46 | * Note that the {@link Expression} is evaluated only once, when the |
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| 47 | * <switch> tag is evaluated. |
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| 48 | * @param on the value to switch on |
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| 49 | */ |
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| 50 | public void setOn(Expression on) { |
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| 51 | 195 | this.on = on; |
| 52 | 195 | } |
| 53 | ||
| 54 | public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException { |
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| 55 | 208 | this.defaultEncountered = false; |
| 56 | 208 | this.someCaseMatched = false; |
| 57 | 208 | this.fallingThru = false; |
| 58 | ||
| 59 | 208 | if(null == on) { |
| 60 | 13 | throw new MissingAttributeException("on"); |
| 61 | } else { |
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| 62 | 195 | value = on.evaluate(context); |
| 63 | 195 | invokeBody(output); |
| 64 | } |
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| 65 | 156 | } |
| 66 | ||
| 67 | // Protected properties |
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| 68 | //------------------------------------------------------------------------- |
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| 69 | protected boolean hasSomeCaseMatched() { |
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| 70 | 182 | return this.someCaseMatched; |
| 71 | } |
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| 72 | ||
| 73 | protected void caseMatched() { |
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| 74 | 195 | this.someCaseMatched = true; |
| 75 | 195 | } |
| 76 | ||
| 77 | protected boolean isFallingThru() { |
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| 78 | 767 | return this.fallingThru; |
| 79 | } |
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| 80 | ||
| 81 | protected void setFallingThru(boolean fallingThru) { |
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| 82 | 195 | this.fallingThru = fallingThru; |
| 83 | 195 | } |
| 84 | ||
| 85 | protected Object getValue() { |
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| 86 | 1261 | return value; |
| 87 | } |
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| 88 | ||
| 89 | protected boolean hasDefaultBeenEncountered() { |
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| 90 | 793 | return defaultEncountered; |
| 91 | } |
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| 92 | ||
| 93 | protected void defaultEncountered() { |
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| 94 | 182 | this.defaultEncountered = true; |
| 95 | 182 | } |
| 96 | ||
| 97 | // Attributes |
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| 98 | //------------------------------------------------------------------------- |
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| 99 | 195 | private boolean someCaseMatched = false; |
| 100 | 195 | private boolean fallingThru = false; |
| 101 | 195 | private boolean defaultEncountered = false; |
| 102 | 195 | private Expression on = null; |
| 103 | 195 | private Object value = null; |
| 104 | ||
| 105 | } |
| This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |