01: package org.apache.ojb.broker.query;
02:
03: /* Copyright 2002-2005 The Apache Software Foundation
04: *
05: * Licensed under the Apache License, Version 2.0 (the "License");
06: * you may not use this file except in compliance with the License.
07: * 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:
18: /**
19: * SelectionCriteria for 'is null' and 'is not null'
20: *
21: * @author <a href="mailto:jbraeuchi@gmx.ch">Jakob Braeuchi</a>
22: * @version $Id: NullCriteria.java,v 1.9.2.1 2005/12/21 22:27:09 tomdz Exp $
23: */
24: public class NullCriteria extends ValueCriteria {
25: NullCriteria(String anAttribute, String aClause, String anAlias) {
26: super (anAttribute, null, aClause, anAlias);
27: }
28:
29: NullCriteria(String anAttribute, String aClause, UserAlias anAlias) {
30: super (anAttribute, null, aClause, anAlias);
31: }
32:
33: public String toString() {
34: return getAttribute() + getClause();
35: }
36:
37: /**
38: * @see SelectionCriteria#isBound()
39: */
40: public boolean isBound() {
41: return true;
42: }
43:
44: /**
45: * @see SelectionCriteria#isBindable()
46: */
47: protected boolean isBindable() {
48: return false;
49: }
50:
51: }
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