Coverage report

  %line %branch
org.apache.commons.jelly.tags.xml.SetTag
67% 
85% 

 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 org.apache.commons.jelly.JellyTagException;
 19  
 import org.apache.commons.jelly.MissingAttributeException;
 20  
 import org.apache.commons.jelly.XMLOutput;
 21  
 import org.apache.commons.jelly.xpath.XPathComparator;
 22  
 import org.apache.commons.jelly.xpath.XPathTagSupport;
 23  
 
 24  
 import org.apache.commons.logging.Log;
 25  
 import org.apache.commons.logging.LogFactory;
 26  
 
 27  
 import org.jaxen.XPath;
 28  
 import org.jaxen.JaxenException;
 29  
 
 30  
 import java.util.ArrayList;
 31  
 import java.util.List;
 32  
 import java.util.Collections;
 33  
 
 34  
 /** A tag which defines a variable from an XPath expression.
 35  
   * This function creates a variable of type {@link List} or {@link org.dom4j.Node}
 36  
   * (for example {@link org.dom4j.Element} or {@link org.dom4j.Attribute}).
 37  
   * Thus, the variable created from xml:set can be
 38  
   * used from the other xml library functions.
 39  
   *
 40  
   * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
 41  
   * @version $Revision: 1.11 $
 42  
   */
 43  2
 public class SetTag extends XPathTagSupport {
 44  
 
 45  
     /** The Log to which logging calls will be made. */
 46  28
     private Log log = LogFactory.getLog(SetTag.class);
 47  
 
 48  
     /** The variable name to export. */
 49  
     private String var;
 50  
 
 51  
     /** The XPath expression to evaluate. */
 52  
     private XPath select;
 53  
 
 54  
     /** Xpath comparator for sorting */
 55  28
     private XPathComparator xpCmp = null;
 56  
 
 57  28
     private Boolean single=null;
 58  
 
 59  28
     public SetTag() {
 60  
 
 61  28
     }
 62  
 
 63  
     // Tag interface
 64  
     //-------------------------------------------------------------------------
 65  
     public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException {
 66  28
         if (var == null) {
 67  0
             throw new MissingAttributeException( "var" );
 68  
         }
 69  28
         if (select == null) {
 70  0
             throw new MissingAttributeException( "select" );
 71  
         }
 72  
 
 73  28
         Object xpathContext = getXPathContext();
 74  28
         Object value = null;
 75  
         try {
 76  28
             if(single!=null && single.booleanValue()==true) {
 77  1
                 value = select.selectSingleNode(xpathContext);
 78  
             } else {
 79  27
                 value = select.evaluate(xpathContext);
 80  
             }
 81  28
         }
 82  
         catch (JaxenException e) {
 83  0
             throw new JellyTagException(e);
 84  
         }
 85  
 
 86  28
         if (value instanceof List) {
 87  
             // sort the list if xpCmp is set.
 88  21
             if (xpCmp != null && (xpCmp.getXpath() != class="keyword">null)) {
 89  1
                 Collections.sort((List)value, xpCmp);
 90  
             }
 91  
         }
 92  28
         if (single!=null) {
 93  2
             if (single.booleanValue()==true) {
 94  1
                 if(value instanceof List) {
 95  0
                     List l = (List) value;
 96  0
                     if (l.size()==0)
 97  0
                         value=null;
 98  
                     else
 99  0
                         value=l.get(0);
 100  
                 }
 101  
             } else { // single == false
 102  1
                 if(! (value instanceof List) ) {
 103  0
                     List l = null;
 104  0
                     if (value==null) {
 105  0
                         l = new ArrayList(0);
 106  
                     } else {
 107  0
                         l = new ArrayList(1);
 108  0
                         l.add(value);
 109  
                     }
 110  0
                     value = l;
 111  
                 }
 112  
             }
 113  
         }
 114  
 
 115  
         //log.info( "Evaluated xpath: " + select + " as: " + value + " of type: " + value.getClass().getName() );
 116  
 
 117  28
         context.setVariable(var, value);
 118  28
     }
 119  
 
 120  
     // Properties
 121  
     //-------------------------------------------------------------------------
 122  
 
 123  
     /** Sets the variable name to define for this expression
 124  
      */
 125  
     public void setVar(String var) {
 126  28
         this.var = class="keyword">var;
 127  28
     }
 128  
 
 129  
     /** Sets the XPath expression to evaluate. */
 130  
     public void setSelect(XPath select) {
 131  28
         this.select = select;
 132  28
     }
 133  
 
 134  
     /** If set to true will only take the first element matching.
 135  
         If set to false, guarantees that a list is returned.
 136  
         It then guarantees that the result is of type
 137  
         {@link org.dom4j.Node} thereby making sure that, for example,
 138  
         when an element is selected, one can directly call such methods
 139  
         as setAttribute.
 140  
         */
 141  
     public void setSingle(boolean single) {
 142  2
         this.single = new Boolean(single);
 143  2
     }
 144  
 
 145  
 
 146  
     /** Sets the xpath expression to use to sort selected nodes.
 147  
      *  Ignored if single is true.
 148  
      */
 149  
     public void setSort(XPath sortXPath) throws JaxenException {
 150  1
         if (xpCmp == null) xpCmp = new XPathComparator();
 151  1
         xpCmp.setXpath(sortXPath);
 152  1
     }
 153  
 
 154  
     /**
 155  
      * Set whether to sort ascending or descending.
 156  
      */
 157  
     public void setDescending(boolean descending) {
 158  0
         if (xpCmp == null) xpCmp = new XPathComparator();
 159  0
         xpCmp.setDescending(descending);
 160  0
     }
 161  
 }

This report is generated by jcoverage, Maven and Maven JCoverage Plugin.