Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
StringTrimmedResultSet |
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| 2.0;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 | } |