01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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;
18:
19: import java.lang.reflect.InvocationHandler;
20: import java.lang.reflect.Method;
21: import java.sql.ResultSetMetaData;
22:
23: /**
24: * MockResultSetMetaData dynamically implements the ResultSetMetaData
25: * interface.
26: */
27: public class MockResultSetMetaData implements InvocationHandler {
28:
29: private String[] columnNames = null;
30:
31: /**
32: * Create a <code>MockResultSetMetaData</code> proxy object. This is
33: * equivalent to:
34: * <pre>
35: * ProxyFactory.instance().createResultSetMetaData(new MockResultSetMetaData(columnNames));
36: * </pre>
37: *
38: * @param columnNames
39: * @return
40: */
41: public static ResultSetMetaData create(String[] columnNames) {
42: return ProxyFactory.instance().createResultSetMetaData(
43: new MockResultSetMetaData(columnNames));
44: }
45:
46: public MockResultSetMetaData(String[] columnNames) {
47: super ();
48: this .columnNames = columnNames;
49:
50: }
51:
52: public Object invoke(Object proxy, Method method, Object[] args)
53: throws Throwable {
54:
55: String methodName = method.getName();
56:
57: if (methodName.equals("getColumnCount")) {
58: return new Integer(this .columnNames.length);
59:
60: } else if (methodName.equals("getColumnName")
61: || methodName.equals("getColumnLabel")) {
62:
63: int col = ((Integer) args[0]).intValue() - 1;
64: return this .columnNames[col];
65:
66: } else if (methodName.equals("hashCode")) {
67: return new Integer(System.identityHashCode(proxy));
68:
69: } else if (methodName.equals("toString")) {
70: return "MockResultSetMetaData "
71: + System.identityHashCode(proxy);
72:
73: } else if (methodName.equals("equals")) {
74: return new Boolean(proxy == args[0]);
75:
76: } else {
77: throw new UnsupportedOperationException(
78: "Unsupported method: " + methodName);
79: }
80: }
81: }
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