01: /*
02: * Copyright 2004-2006 the original author or authors.
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:
17: package org.compass.core.converter.mapping.osem;
18:
19: import org.apache.commons.logging.Log;
20: import org.apache.commons.logging.LogFactory;
21: import org.compass.core.Resource;
22: import org.compass.core.converter.ConversionException;
23: import org.compass.core.converter.Converter;
24: import org.compass.core.mapping.Mapping;
25: import org.compass.core.marshall.MarshallingContext;
26: import org.compass.core.marshall.MarshallingEnvironment;
27:
28: /**
29: *
30: * @author kimchy
31: *
32: */
33: public class ParentMappingConverter implements Converter {
34:
35: private static Log log = LogFactory
36: .getLog(ParentMappingConverter.class);
37:
38: public boolean marshall(Resource resource, Object root,
39: Mapping mapping, MarshallingContext context)
40: throws ConversionException {
41: // nothing to do here
42: return false;
43: }
44:
45: public Object unmarshall(Resource resource, Mapping mapping,
46: MarshallingContext context) throws ConversionException {
47: // ParentMapping parentMapping = (ParentMapping) mapping;
48: Object parent = context
49: .getAttribute(MarshallingEnvironment.ATTRIBUTE_PARENT);
50: if (parent == null) {
51: log
52: .warn("The parent object should not be null, skipping the unmarshall");
53: return null;
54: }
55: return parent;
56: }
57: }
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