01: /*
02: * Copyright 2004, 2005, 2006 Odysseus Software GmbH
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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 de.odysseus.calyxo.forms.check;
17:
18: /**
19: * Check for not null.
20: *
21: * @author Christoph Beck
22: */
23: public class NotNullChecker extends SimpleChecker {
24: public NotNullChecker() {
25: super ();
26: }
27:
28: /**
29: * @return <code>true</code> iff the specified value is not <code>null</code>
30: */
31: public boolean check(Object value) {
32: return value != null;
33: }
34:
35: /**
36: * This checker is thread-save, so answer <code>true</code>
37: */
38: public boolean isSharable() {
39: return true;
40: }
41: }
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