/**
* Generate the xml top level element and start streaming the components.
*
* @param components
* @param contentHandler
* @throws SAXException
*/
protected static void generateXML(
Components components, ContentHandler contentHandler, boolean isScrPrivateFile)
throws SAXException {
// detect namespace to use
final String namespace;
if (components.getSpecVersion() == Constants.VERSION_1_0) {
namespace = NAMESPACE_URI_1_0;
} else if (components.getSpecVersion() == Constants.VERSION_1_1) {
namespace = NAMESPACE_URI_1_1;
} else {
namespace = NAMESPACE_URI_1_1_FELIX;
}
contentHandler.startDocument();
contentHandler.startPrefixMapping(PREFIX, namespace);
// wrapper element to generate well formed xml
contentHandler.startElement(
"",
ComponentDescriptorIO.COMPONENTS,
ComponentDescriptorIO.COMPONENTS,
new AttributesImpl());
IOUtils.newline(contentHandler);
for (final Component component : components.getComponents()) {
if (component.isDs()) {
generateXML(namespace, component, contentHandler, isScrPrivateFile);
}
}
// end wrapper element
contentHandler.endElement(
"", ComponentDescriptorIO.COMPONENTS, ComponentDescriptorIO.COMPONENTS);
IOUtils.newline(contentHandler);
contentHandler.endPrefixMapping(PREFIX);
contentHandler.endDocument();
}
/**
* This will invoke the <code>endPrefixMapping</code> callback in the <code>ContentHandler</code>
* when a namespace is goes out of scope in the <code>Document</code>.
*
* @param namespace Namespace leaving scope.
*/
private void endPrefixMapping(Namespace namespace) throws JDOMException {
try {
contentHandler.endPrefixMapping(namespace.getPrefix());
} catch (SAXException se) {
throw new JDOMException("Exception in endPrefixMapping", se);
}
}
public static void streamNullDocument(ContentHandler contentHandler) throws SAXException {
contentHandler.startDocument();
contentHandler.startPrefixMapping(XMLConstants.XSI_PREFIX, XMLConstants.XSI_URI);
final AttributesImpl attributes = new AttributesImpl();
attributes.addAttribute(XMLConstants.XSI_URI, "nil", "xsi:nil", "CDATA", "true");
contentHandler.startElement("", "null", "null", attributes);
contentHandler.endElement("", "null", "null");
contentHandler.endPrefixMapping(XMLConstants.XSI_PREFIX);
contentHandler.endDocument();
}
/**
* This will invoke the <code>endPrefixMapping</code> callback in the <code>ContentHandler</code>
* when a namespace is goes out of scope in the <code>Document</code>.
*
* @param namespaces <code>List</code> stack of Namespaces in scope.
* @param previouslyDeclaredNamespaces number of previously declared namespaces
*/
private void endPrefixMapping(NamespaceStack namespaces, int previouslyDeclaredNamespaces)
throws JDOMException {
while (namespaces.size() > previouslyDeclaredNamespaces) {
String prefix = namespaces.pop();
try {
contentHandler.endPrefixMapping(prefix);
} catch (SAXException se) {
throw new JDOMException("Exception in endPrefixMapping", se);
}
}
}
