Coverage report

  %line %branch
org.apache.commons.jelly.tags.xml.ForEachTag
93% 
100% 

 1   
 /*
 2   
  * Copyright 2002,2004 The Apache Software Foundation.
 3   
  *
 4   
  * Licensed under the Apache License, Version 2.0 (the "License");
 5   
  * you may not use this file except in compliance with the License.
 6   
  * You may obtain a copy of the License at
 7   
  *
 8   
  *      http://www.apache.org/licenses/LICENSE-2.0
 9   
  *
 10   
  * Unless required by applicable law or agreed to in writing, software
 11   
  * distributed under the License is distributed on an "AS IS" BASIS,
 12   
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 13   
  * See the License for the specific language governing permissions and
 14   
  * limitations under the License.
 15   
  */
 16   
 package org.apache.commons.jelly.tags.xml;
 17   
 
 18   
 import java.util.Iterator;
 19   
 import java.util.List;
 20   
 import java.util.Collections;
 21   
 
 22   
 import org.apache.commons.jelly.JellyTagException;
 23   
 import org.apache.commons.jelly.XMLOutput;
 24   
 import org.apache.commons.jelly.xpath.XPathComparator;
 25   
 import org.apache.commons.jelly.xpath.XPathSource;
 26   
 import org.apache.commons.jelly.xpath.XPathTagSupport;
 27   
 
 28   
 import org.jaxen.XPath;
 29   
 import org.jaxen.JaxenException;
 30   
 
 31   
 /** A tag which performs an iteration over the results of an XPath expression
 32   
   *
 33   
   * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
 34   
   * @version $Revision: 155420 $
 35   
   */
 36   
 public class ForEachTag extends XPathTagSupport implements XPathSource {
 37   
 
 38   
     /** Holds the XPath selector. */
 39   
     private XPath select;
 40   
 
 41   
     /** Xpath comparator for sorting */
 42  40 
     private XPathComparator xpCmp = null;
 43   
 
 44   
     /** If specified then the current item iterated through will be defined
 45   
       * as the given variable name. */
 46   
     private String var;
 47   
 
 48   
     /** The current iteration value */
 49   
     private Object iterationValue;
 50   
 
 51   
 
 52  40 
     public ForEachTag() {
 53  40 
     }
 54   
 
 55   
     // Tag interface
 56   
     //-------------------------------------------------------------------------
 57   
     public void doTag(XMLOutput output) throws JellyTagException {
 58  35 
         if (select != null) {
 59  35 
             List nodes = null;
 60   
             try {
 61  35 
                 nodes = select.selectNodes( getXPathContext() );
 62   
             }
 63  0 
             catch (JaxenException e) {
 64  0 
                 throw new JellyTagException(e);
 65  35 
             }
 66   
 
 67   
             // sort the list if xpCmp is set.
 68  35 
             if (xpCmp != null && (xpCmp.getXpath() != class="keyword">null)) {
 69  20 
                 Collections.sort(nodes, xpCmp);
 70   
             }
 71   
 
 72  35 
             Iterator iter = nodes.iterator();
 73  180 
             while (iter.hasNext()) {
 74  145 
                 iterationValue = iter.next();
 75  145 
                 if (var != null) {
 76  125 
                     context.setVariable(var, iterationValue);
 77   
                 }
 78  145 
                 invokeBody(output);
 79   
             }
 80   
         }
 81  35 
     }
 82   
 
 83   
     // XPathSource interface
 84   
     //-------------------------------------------------------------------------
 85   
 
 86   
     /**
 87   
      * @return the current XPath iteration value
 88   
      *  so that any other XPath aware child tags to use
 89   
      */
 90   
     public Object getXPathSource() {
 91  125 
         return iterationValue;
 92   
     }
 93   
 
 94   
     // Properties
 95   
     //-------------------------------------------------------------------------
 96   
     /** Sets the XPath selection expression
 97   
       */
 98   
     public void setSelect(XPath select) {
 99  35 
         this.select = select;
 100  35 
     }
 101   
 
 102   
     /** Sets the variable name to export for the item being iterated over
 103   
      */
 104   
     public void setVar(String var) {
 105  25 
         this.var = class="keyword">var;
 106  25 
     }
 107   
 
 108   
     /** Sets the xpath expression to use to sort selected nodes.
 109   
      */
 110   
     public void setSort(XPath sortXPath) throws JaxenException {
 111  20 
         if (xpCmp == null) xpCmp = new XPathComparator();
 112  20 
         xpCmp.setXpath(sortXPath);
 113  20 
     }
 114   
 
 115   
     /**
 116   
      * Set whether to sort ascending or descending.
 117   
      */
 118   
     public void setDescending(boolean descending) {
 119  5 
         if (xpCmp == null) xpCmp = new XPathComparator();
 120  5 
         xpCmp.setDescending(descending);
 121  5 
     }
 122   
 
 123   
     /*
 124   
      * Override superclass so method can be access by IfTag
 125   
      */
 126   
     protected Object getXPathContext() {
 127  35 
         return super.getXPathContext();
 128   
     }
 129   
 
 130   
 }

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