public WorkspaceLanguageConfiguration decodeWorkspaceMappings() throws CoreException {
IEclipsePreferences node = InstanceScope.INSTANCE.getNode(CCorePlugin.PLUGIN_ID);
IEclipsePreferences defaultNode = DefaultScope.INSTANCE.getNode(CCorePlugin.PLUGIN_ID);
String encodedMappings = node.get(CCorePreferenceConstants.WORKSPACE_LANGUAGE_MAPPINGS, null);
if (encodedMappings == null) {
encodedMappings = defaultNode.get(CCorePreferenceConstants.WORKSPACE_LANGUAGE_MAPPINGS, null);
}
WorkspaceLanguageConfiguration config = new WorkspaceLanguageConfiguration();
if (encodedMappings == null || encodedMappings.length() == 0) {
return config;
}
// The mappings are encoded as XML in a String so we need to parse it.
InputSource input = new InputSource(new StringReader(encodedMappings));
try {
Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(input);
config.setWorkspaceMappings(decodeContentTypeMappings(document.getDocumentElement()));
return config;
} catch (SAXException e) {
throw new CoreException(Util.createStatus(e));
} catch (IOException e) {
throw new CoreException(Util.createStatus(e));
} catch (ParserConfigurationException e) {
throw new CoreException(Util.createStatus(e));
}
}
public void storeMappings(WorkspaceLanguageConfiguration config) throws CoreException {
try {
// Encode mappings as XML and serialize as a String.
Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
Element rootElement = doc.createElement(WORKSPACE_MAPPINGS);
doc.appendChild(rootElement);
addContentTypeMappings(config.getWorkspaceMappings(), rootElement);
Transformer serializer = createSerializer();
DOMSource source = new DOMSource(doc);
StringWriter buffer = new StringWriter();
StreamResult result = new StreamResult(buffer);
serializer.transform(source, result);
String encodedMappings = buffer.getBuffer().toString();
IEclipsePreferences node = InstanceScope.INSTANCE.getNode(CCorePlugin.PLUGIN_ID);
node.put(CCorePreferenceConstants.WORKSPACE_LANGUAGE_MAPPINGS, encodedMappings);
node.flush();
} catch (ParserConfigurationException e) {
throw new CoreException(Util.createStatus(e));
} catch (TransformerException e) {
throw new CoreException(Util.createStatus(e));
} catch (BackingStoreException e) {
throw new CoreException(Util.createStatus(e));
}
}
private Transformer createSerializer() throws CoreException {
try {
return TransformerFactory.newInstance().newTransformer();
} catch (TransformerConfigurationException e) {
throw new CoreException(Util.createStatus(e));
} catch (TransformerFactoryConfigurationError e) {
throw new CoreException(Util.createStatus(e));
}
}