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Java > Open Source Codes > org > apache > servicemix > jbi > util > LazyDOMSource


1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License. You may obtain a copy of the License at
8  *
9  * 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 package org.apache.servicemix.jbi.util;
18
19 import org.w3c.dom.Node JavaDoc;
20
21 import javax.xml.transform.dom.DOMSource JavaDoc;
22
23 /**
24  * A lazily created source which is only created if its required.
25  *
26  * @version $Revision: 426415 $
27  */
28 public abstract class LazyDOMSource extends DOMSource JavaDoc {
29     private boolean initialized;
30
31     public LazyDOMSource() {
32     }
33
34     public Node JavaDoc getNode() {
35         if (! initialized) {
36             setNode(loadNode());
37             initialized = true;
38         }
39         return super.getNode();
40     }
41
42     protected abstract Node JavaDoc loadNode();
43 }
44
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