1 /*
2 * Copyright (c) 2003, Henri Yandell
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or
6 * without modification, are permitted provided that the
7 * following conditions are met:
8 *
9 * + Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * + Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * + Neither the name of Scabies nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32 package org.osjava.oscube.util;
33
34 import com.generationjava.lang.ClassW;
35
36 public class FactoryUtils {
37
38 static private String NULL_NAME = "Null";
39
40 static public Object getObject(String name, String type, String defaultPackage) {
41 if(name != null) {
42 Object obj = ClassW.createObject(defaultPackage+"."+name+type);
43 // should it check the type? it assumes we have a
44 // clue what the interface is...
45 if(obj != null) {
46 return obj;
47 }
48 obj = ClassW.createObject(name);
49 if(obj != null) {
50 return obj;
51 }
52 }
53 if(name == NULL_NAME) {
54 // if it couldn't find the Null pattern for the type
55 return null;
56 } else {
57 Object obj = getObject(NULL_NAME, type, defaultPackage);
58 if(obj == null) {
59 throw new RuntimeException("Unable to find class: " + name + " or an acceptable Null pattern default. ");
60 }
61 return obj;
62 }
63 }
64
65 }