1 /*******************************************************************************
2 * Copyright 2012 pw999
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 ******************************************************************************/
16 package net.sf.oqt.jpa;
17
18 import java.math.BigInteger;
19 import java.util.Date;
20
21 /**
22 * Factory to initialize whathever has to be initialized to allows proper JPQL execution.
23 *
24 * @author phillip
25 *
26 */
27 class ParameterFactory {
28 /**
29 * Tries to initialized an object of type clazz.
30 *
31 * @param clazz the class to initliase.
32 * @return the initialized object or an empty String if object could ne be initialized.
33 */
34 static Object intialize(final Class<?> clazz) {
35 if (clazz.equals(Object.class)) { // when using IN statements
36 return "";
37 }
38 try {
39 return clazz.newInstance();
40 } catch (IllegalAccessException e) {
41 ; // it failed,let's do it manually
42 } catch (InstantiationException e) {
43 ; // it failed,let's do it manually
44 }
45 if (clazz.equals(Long.class)) {
46 return 1L;
47 }
48 if (clazz.equals(Integer.class)) {
49 return 1;
50 }
51 if (clazz.equals(Short.class)) {
52 return Short.valueOf("1");
53 }
54 if (clazz.equals(BigInteger.class)) {
55 return BigInteger.ONE;
56 }
57 if (clazz.equals(String.class)) {
58 return "1";
59 }
60 if (clazz.equals(Date.class)) {
61 return new Date();
62 }
63 if (clazz.equals(Boolean.class)) {
64 return true;
65 }
66 System.out.println("Unknown parameter type, I'll try a string");
67 return "";
68 }
69 }