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1 package org.columba.core.gui.docking;
2
3 import java.io.IOException  ;
4 import java.io.InputStream ;
5 import java.io.OutputStream ;
6 import java.io.OutputStreamWriter ;
7
8 import javax.xml.parsers.DocumentBuilder ;
9 import javax.xml.parsers.DocumentBuilderFactory ;
10 import javax.xml.parsers.ParserConfigurationException ;
11 import javax.xml.transform.OutputKeys ;
12 import javax.xml.transform.Transformer ;
13 import javax.xml.transform.TransformerConfigurationException ;
14 import javax.xml.transform.TransformerException ;
15 import javax.xml.transform.TransformerFactory ;
16 import javax.xml.transform.dom.DOMSource ;
17 import javax.xml.transform.stream.StreamResult ;
18
19 import org.flexdock.docking.DockingPort;
20 import org.flexdock.docking.state.LayoutNode;
21 import org.flexdock.docking.state.PersistenceException;
22 import org.flexdock.perspective.persist.xml.ISerializer;
23 import org.flexdock.perspective.persist.xml.SerializerRegistry;
24 import org.flexdock.util.Utilities;
25 import org.w3c.dom.Document ;
26 import org.w3c.dom.Element ;
27 import org.xml.sax.InputSource ;
28 import org.xml.sax.SAXException ;
29
30 public class XMLPersister {
31
32 private DocumentBuilder createDocumentBuilder() throws PersistenceException {
33 try {
34 DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
35 DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
36
37 return documentBuilder;
38 } catch (ParserConfigurationException ex) {
39 throw new PersistenceException("Unable to create document builder", ex);
40 }
41 }
42
43 public boolean store(OutputStream os, DockingPort dockingPort) throws IOException , PersistenceException {
44 DocumentBuilder documentBuilder = createDocumentBuilder();
45 Document document = documentBuilder.newDocument();
46
47 ISerializer serializer = SerializerRegistry.getSerializer(LayoutNode.class);
48 Element layoutNodeElement = serializer.serialize(document, dockingPort.exportLayout());
49
50 document.appendChild(layoutNodeElement);
51
52 TransformerFactory transformerFactory = TransformerFactory.newInstance();
53 if(Utilities.JAVA_1_5) {
55 transformerFactory.setAttribute("indent-number", new Integer (4));
56 }
57
58 try {
59 Transformer transformer = transformerFactory.newTransformer();
60 transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
62 transformer.setOutputProperty(OutputKeys.INDENT, "yes");
63
64 DOMSource source = new DOMSource (document);
65 StreamResult result = new StreamResult (new OutputStreamWriter (os));
66
67 transformer.transform(source, result);
68 } catch (TransformerConfigurationException ex) {
69 throw new PersistenceException("Unable to serialize perspectiveModel", ex);
70 } catch (TransformerException ex) {
71 throw new PersistenceException("Unable to serialize perspectiveModel", ex);
72 }
73
74 return true;
75 }
76
77 public void load(InputStream is, DockingPort dockingPort) throws IOException , PersistenceException {
78 try {
79 InputSource inputSource = new InputSource (is);
80 DocumentBuilder documentBuilder = createDocumentBuilder();
81 Document document = documentBuilder.parse(inputSource);
82
83 ISerializer layoutNodeSerializer = SerializerRegistry.getSerializer(LayoutNode.class);
84 LayoutNode layoutNode = (LayoutNode) layoutNodeSerializer.deserialize(document.getDocumentElement());
85 dockingPort.importLayout(layoutNode);
86
87 } catch (SAXException ex) {
88 throw new PersistenceException("Unable to deserialize perspectiveModel from xml", ex);
89 }
90 }
91
92 }
93 |
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