Coverage Report - org.apache.commons.dbutils.wrappers.StringTrimmedResultSet
 
Classes in this File Line Coverage Branch Coverage Complexity
StringTrimmedResultSet
0%
0/10
0%
0/6
2
 
 1  
 /*
 2  
  * Licensed to the Apache Software Foundation (ASF) under one or more
 3  
  * contributor license agreements.  See the NOTICE file distributed with
 4  
  * this work for additional information regarding copyright ownership.
 5  
  * The ASF licenses this file to You under the Apache License, Version 2.0
 6  
  * (the "License"); you may not use this file except in compliance with
 7  
  * the License.  You may obtain a copy of the License at
 8  
  *
 9  
  *      http://www.apache.org/licenses/LICENSE-2.0
 10  
  *
 11  
  * Unless required by applicable law or agreed to in writing, software
 12  
  * distributed under the License is distributed on an "AS IS" BASIS,
 13  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 14  
  * See the License for the specific language governing permissions and
 15  
  * limitations under the License.
 16  
  */
 17  
 package org.apache.commons.dbutils.wrappers;
 18  
 
 19  
 import java.lang.reflect.InvocationHandler;
 20  
 import java.lang.reflect.Method;
 21  
 import java.sql.ResultSet;
 22  
 
 23  
 import org.apache.commons.dbutils.ProxyFactory;
 24  
 
 25  
 /**
 26  
  * Wraps a <code>ResultSet</code> to trim strings returned by the
 27  
  * <code>getString()</code> and <code>getObject()</code> methods.
 28  
  * 
 29  
  * <p>
 30  
  * Usage Example:
 31  
  * This example shows how to decorate ResultSets so processing continues as 
 32  
  * normal but all Strings are trimmed before being returned from the 
 33  
  * <code>ResultSet</code>.
 34  
  * </p>
 35  
  * 
 36  
  * <pre>
 37  
  * ResultSet rs = // somehow get a ResultSet;
 38  
  * 
 39  
  * // Substitute wrapped ResultSet with additional behavior for real ResultSet
 40  
  * rs = StringTrimmedResultSet.wrap(rs);
 41  
  * 
 42  
  * // Pass wrapped ResultSet to processor
 43  
  * List list = new BasicRowProcessor().toBeanList(rs);
 44  
  * </pre>
 45  
  */
 46  
 public class StringTrimmedResultSet implements InvocationHandler {
 47  
 
 48  
     /**
 49  
      * The factory to create proxies with.
 50  
      */
 51  0
     private static final ProxyFactory factory = ProxyFactory.instance();
 52  
 
 53  
     /**
 54  
      * Wraps the <code>ResultSet</code> in an instance of this class.  This is
 55  
      * equivalent to:
 56  
      * <pre>
 57  
      * ProxyFactory.instance().createResultSet(new StringTrimmedResultSet(rs));
 58  
      * </pre>
 59  
      * 
 60  
      * @param rs The <code>ResultSet</code> to wrap.
 61  
      * @return wrapped ResultSet
 62  
      */
 63  
     public static ResultSet wrap(ResultSet rs) {
 64  0
         return factory.createResultSet(new StringTrimmedResultSet(rs));
 65  
     }
 66  
 
 67  
     /**
 68  
      * The wrapped result. 
 69  
      */
 70  
     private final ResultSet rs;
 71  
 
 72  
     /**
 73  
      * Constructs a new instance of <code>StringTrimmedResultSet</code>
 74  
      * to wrap the specified <code>ResultSet</code>.
 75  
      * @param rs ResultSet to wrap
 76  
      */
 77  
     public StringTrimmedResultSet(ResultSet rs) {
 78  0
         super();
 79  0
         this.rs = rs;
 80  0
     }
 81  
 
 82  
     /**
 83  
      * Intercept calls to the <code>getString()</code> and 
 84  
      * <code>getObject()</code> methods and trim any Strings before they're
 85  
      * returned.
 86  
      * 
 87  
      * @throws Throwable
 88  
      * @see java.lang.reflect.InvocationHandler#invoke(java.lang.Object, java.lang.reflect.Method, java.lang.Object[])
 89  
      */
 90  
     public Object invoke(Object proxy, Method method, Object[] args)
 91  
         throws Throwable {
 92  
 
 93  0
         Object result = method.invoke(this.rs, args);
 94  
 
 95  0
         if (method.getName().equals("getObject")
 96  
             || method.getName().equals("getString")) {
 97  
 
 98  0
             if (result instanceof String) {
 99  0
                 result = ((String) result).trim();
 100  
             }
 101  
         }
 102  
 
 103  0
         return result;
 104  
     }
 105  
 
 106  
 }