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.converter;
16:
17: /**
18: * String to string converter which converts from null in the target object to an empty String in the source String, and
19: * vice versa. This converter should be used when doing a String conversion and you wish to treat an empty String as
20: * null in the target domain object. Note that a HTML form text field that is not populated is sent as an empty String
21: *
22: * @author Phil Zoio
23: */
24: public class BlankToNullStringConverter extends StringConverter {
25:
26: public BlankToNullStringConverter() {
27: super ();
28: }
29:
30: public Object toTargetType(String toConvert) {
31: if (toConvert == null)
32: return null;
33: if (toConvert.length() == 0)
34: return null;
35: return toConvert;
36: }
37:
38: public String toSourceType(Object toConvert) {
39: if (toConvert == null || ((String) toConvert).length() == 0)
40: return "";
41: return toConvert.toString();
42: }
43:
44: }
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