01: /*
02: * Copyright 2005-2006 the original author or authors.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
05: * in compliance with the License. You may obtain a copy of the License at
06: *
07: * http://www.apache.org/licenses/LICENSE-2.0
08: *
09: * Unless required by applicable law or agreed to in writing, software distributed under the License
10: * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11: * or implied. See the License for the specific language governing permissions and limitations under
12: * the License.
13: */
14:
15: package org.strecks.validator;
16:
17: import org.apache.commons.validator.GenericValidator;
18:
19: /**
20: * Checks to ensure that a non-empty String or non-null object thas been supplied
21: * @author Phil Zoio
22: */
23: public class RequiredValidator implements Validator<Object> {
24:
25: /**
26: * Uses Commons Validator's GenericValidator.isBlankOrNull() to ensure that non-empty String is supplied (for
27: * Strings), otherwise, simply checks that value is not null
28: */
29: public boolean validate(Object value) {
30: if (value instanceof String)
31: return !GenericValidator.isBlankOrNull((String) value);
32: else
33: return value != null;
34: }
35:
36: public boolean isRequired() {
37: return true;
38: }
39:
40: }
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