Coverage Report - org.apache.tapestry.dojo.form.DefaultAutocompleteModel
 
Classes in this File Line Coverage Branch Coverage Complexity
DefaultAutocompleteModel
0%
0/29
0%
0/10
3.6
 
 1  
 // Copyright Jul 30, 2006 The Apache Software Foundation
 2  
 //
 3  
 // Licensed under the Apache License, Version 2.0 (the "License");
 4  
 // you may not use this file except in compliance with the License.
 5  
 // You may obtain a copy of the License at
 6  
 //
 7  
 //     http://www.apache.org/licenses/LICENSE-2.0
 8  
 //
 9  
 // Unless required by applicable law or agreed to in writing, software
 10  
 // distributed under the License is distributed on an "AS IS" BASIS,
 11  
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 12  
 // See the License for the specific language governing permissions and
 13  
 // limitations under the License.
 14  
 package org.apache.tapestry.dojo.form;
 15  
 
 16  
 import org.apache.commons.beanutils.PropertyUtils;
 17  
 import org.apache.hivemind.ApplicationRuntimeException;
 18  
 import org.apache.hivemind.util.Defense;
 19  
 
 20  
 import java.util.ArrayList;
 21  
 import java.util.List;
 22  
 
 23  
 
 24  
 /**
 25  
  * Default simple implementation of {@link IAutocompleteModel}. This class relies
 26  
  * on the java beans specification to resolve key fields of an incoming 
 27  
  * {@link List}. 
 28  
  * 
 29  
  * <p>
 30  
  *  If you had an object type of <code>User</code>, with the primary/unique id of 
 31  
  *  each <code>User</code> object stored as a member with a name of <code>id</code> 
 32  
  *  you would pass something like this into the model(don't forget that javabeans syntax
 33  
  *  requires a corresponding getId() for members):
 34  
  * </p>
 35  
  * 
 36  
  * <pre>
 37  
  *  IAutocompleteModel model = new DefaultAutocompleteModel(List users, "id", "name");
 38  
  * </pre>
 39  
  * 
 40  
  * @see "http://jakarta.apache.org/commons/beanutils/commons-beanutils-1.6.1/docs/api/org/apache/commons/beanutils/PropertyUtils.html"
 41  
  * @author jkuhnert
 42  
  */
 43  
 public class DefaultAutocompleteModel implements IAutocompleteModel
 44  
 {
 45  
 
 46  
     private List _values;
 47  
     
 48  
     private String _keyExpression;
 49  
     
 50  
     private String _labelExpression;
 51  
     
 52  
     /**
 53  
      * Create a new model using java beans syntax to access the key/label
 54  
      * for the list using the specified bean expressions.
 55  
      * 
 56  
      * @param values 
 57  
      *          The list of values to manage.
 58  
      * @param keyField 
 59  
      *          The java beans expression for getting the primary key of each object
 60  
      *          in the list. {@link #getPrimaryKey(Object)}.
 61  
      * @param labelField
 62  
      *          The java beans expression for getting the label of each object
 63  
      *          in the list. {@link #getLabelFor(Object)}.
 64  
      */
 65  
     public DefaultAutocompleteModel(List values, String keyField, String labelField) 
 66  0
     {
 67  0
         Defense.notNull(values, "Value list can't be null.");
 68  0
         Defense.notNull(keyField, "Model keyField java beans expression can't be null.");
 69  0
         Defense.notNull(labelField, "Model labelField java beans expression can't be null.");
 70  
         
 71  0
         _values = values;
 72  0
         _keyExpression = keyField;
 73  0
         _labelExpression = labelField;
 74  0
     }
 75  
     
 76  
     /**
 77  
      * {@inheritDoc}
 78  
      */
 79  
     public List getValues(String match)
 80  
     {
 81  0
         List ret = new ArrayList();
 82  
         
 83  0
         if (match == null)
 84  0
             return ret;
 85  
         
 86  0
         String filter = match.trim().toLowerCase();
 87  
         
 88  0
         for (int i = 0; i < _values.size(); i++)
 89  
         {    
 90  0
             Object value = _values.get(i);
 91  0
             String label = getLabelFor(value);
 92  
             
 93  0
             if (label.toLowerCase().indexOf(filter) > -1)
 94  0
                 ret.add(value);
 95  
         }
 96  
         
 97  0
         return ret;
 98  
     }
 99  
     
 100  
     /** 
 101  
      * {@inheritDoc}
 102  
      */
 103  
     public String getLabelFor(Object value)
 104  
     {
 105  
         try
 106  
         {
 107  0
             return PropertyUtils.getProperty(value, _labelExpression).toString();
 108  0
         } catch (Exception e)
 109  
         {
 110  0
             throw new ApplicationRuntimeException(e);
 111  
         }
 112  
     }
 113  
 
 114  
     /** 
 115  
      * {@inheritDoc}
 116  
      */
 117  
     public Object getPrimaryKey(Object value)
 118  
     {
 119  
         try
 120  
         {
 121  0
             return PropertyUtils.getProperty(value, _keyExpression);   
 122  0
         } catch (Exception e)
 123  
         {
 124  0
             throw new ApplicationRuntimeException(e);
 125  
         }
 126  
     }
 127  
 
 128  
     /** 
 129  
      * {@inheritDoc}
 130  
      */
 131  
     public Object getValue(Object primaryKey)
 132  
     {
 133  0
         for (int i = 0; i < _values.size(); i++)
 134  
         {    
 135  0
             Object value = _values.get(i);
 136  
             
 137  0
             if (getPrimaryKey(value).toString().equals(primaryKey.toString()))
 138  0
                 return value;
 139  
         }
 140  
         
 141  0
         return null;
 142  
     }
 143  
 
 144  
 }