01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. 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: /* $Id: NoReplacePropertyMerger.java 426584 2006-07-28 16:01:47Z jeremias $ */
19:
20: package org.apache.xmlgraphics.xmp.merge;
21:
22: import org.apache.xmlgraphics.xmp.Metadata;
23: import org.apache.xmlgraphics.xmp.XMPProperty;
24:
25: /**
26: * A basic PropertyMerger which only sets a value in the target metadata if there's not already
27: * another value.
28: */
29: public class NoReplacePropertyMerger implements PropertyMerger {
30:
31: /**
32: * @see org.apache.xmlgraphics.xmp.merge.PropertyMerger#merge(
33: * org.apache.xmlgraphics.xmp.XMPProperty, org.apache.xmlgraphics.xmp.Metadata)
34: */
35: public void merge(XMPProperty sourceProp, Metadata target) {
36: XMPProperty prop = target.getProperty(sourceProp.getName());
37: if (prop == null) {
38: target.setProperty(sourceProp);
39: }
40: }
41:
42: }
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