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org.apache.commons.jelly.tags.xml.SortTag |
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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 | ||
17 | package org.apache.commons.jelly.tags.xml; |
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18 | ||
19 | import org.apache.commons.jelly.JellyTagException; |
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20 | import org.apache.commons.jelly.XMLOutput; |
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21 | import org.apache.commons.jelly.MissingAttributeException; |
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22 | import org.apache.commons.jelly.xpath.XPathComparator; |
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23 | import org.apache.commons.jelly.xpath.XPathTagSupport; |
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24 | import org.jaxen.XPath; |
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25 | import org.jaxen.JaxenException; |
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26 | ||
27 | import java.util.List; |
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28 | import java.util.Collections; |
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29 | ||
30 | /** A tag that can sort a list of xml nodes via an xpath expression. |
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31 | * |
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32 | * @author <a href="mailto:jason@jhorman.org">Jason Horman</a> |
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33 | * @version $Id: SortTag.java,v 1.5 2004/09/09 12:24:40 dion Exp $ |
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34 | */ |
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35 | ||
36 | 2 | public class SortTag extends XPathTagSupport { |
37 | ||
38 | /** The list to sort */ |
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39 | 1 | private List list = null; |
40 | ||
41 | /** Xpath comparator for sorting */ |
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42 | 1 | private XPathComparator xpCmp = null; |
43 | ||
44 | public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException { |
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45 | 1 | if (xpCmp == null) { |
46 | 0 | throw new MissingAttributeException( "xpCmp" ); |
47 | } |
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48 | 1 | if (list == null) { |
49 | 0 | throw new MissingAttributeException( "list" ); |
50 | } |
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51 | ||
52 | 1 | Collections.sort(list, xpCmp); |
53 | 1 | } |
54 | ||
55 | /** Set the list to sort. */ |
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56 | public void setList(List list) { |
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57 | 1 | this.list = list; |
58 | 1 | } |
59 | ||
60 | /** Sets the xpath expression to use to sort selected nodes. |
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61 | */ |
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62 | public void setSort(XPath sortXPath) throws JaxenException { |
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63 | 1 | if (xpCmp == null) xpCmp = new XPathComparator(); |
64 | 1 | xpCmp.setXpath(sortXPath); |
65 | 1 | } |
66 | ||
67 | /** |
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68 | * Set whether to sort ascending or descending. |
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69 | */ |
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70 | public void setDescending(boolean descending) { |
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71 | 0 | if (xpCmp == null) xpCmp = new XPathComparator(); |
72 | 0 | xpCmp.setDescending(descending); |
73 | 0 | } |
74 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |