| /* |
| * Copyright 2002,2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.commons.jelly.tags.xml; |
| |
| import org.apache.commons.jelly.JellyTagException; |
| import org.apache.commons.jelly.XMLOutput; |
| import org.apache.commons.jelly.MissingAttributeException; |
| import org.apache.commons.jelly.xpath.XPathComparator; |
| import org.apache.commons.jelly.xpath.XPathTagSupport; |
| import org.jaxen.XPath; |
| import org.jaxen.JaxenException; |
| |
| import java.util.List; |
| import java.util.Collections; |
| |
| /** A tag that can sort a list of xml nodes via an xpath expression. |
| * |
| * @author <a href="mailto:jason@jhorman.org">Jason Horman</a> |
| * @version $Id: SortTag.java,v 1.5 2004/09/09 12:24:40 dion Exp $ |
| */ |
| |
| public class SortTag extends XPathTagSupport { |
| |
| /** The list to sort */ |
| private List list = null; |
| |
| /** Xpath comparator for sorting */ |
| private XPathComparator xpCmp = null; |
| |
| public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException { |
| if (xpCmp == null) { |
| throw new MissingAttributeException( "xpCmp" ); |
| } |
| if (list == null) { |
| throw new MissingAttributeException( "list" ); |
| } |
| |
| Collections.sort(list, xpCmp); |
| } |
| |
| /** Set the list to sort. */ |
| public void setList(List list) { |
| this.list = list; |
| } |
| |
| /** Sets the xpath expression to use to sort selected nodes. |
| */ |
| public void setSort(XPath sortXPath) throws JaxenException { |
| if (xpCmp == null) xpCmp = new XPathComparator(); |
| xpCmp.setXpath(sortXPath); |
| } |
| |
| /** |
| * Set whether to sort ascending or descending. |
| */ |
| public void setDescending(boolean descending) { |
| if (xpCmp == null) xpCmp = new XPathComparator(); |
| xpCmp.setDescending(descending); |
| } |
| } |