void lookupPrefix(org.w3c.dom.Node node) {
if (node == null) throw new IllegalArgumentException("node must not be null");
String prefix = node.lookupPrefix(namespace.getUri());
if (prefix == null) {
// check to see if we match the default namespace
String defaultNamespace = node.lookupNamespaceURI(null);
if (defaultNamespace == null) defaultNamespace = "";
String nodeNamespace = namespace.getUri();
if (nodeNamespace.equals(defaultNamespace)) {
prefix = "";
}
}
int i = 0;
while (prefix == null) {
String generatedPrefix = "e4x_" + i++;
String generatedUri = node.lookupNamespaceURI(generatedPrefix);
if (generatedUri == null) {
prefix = generatedPrefix;
org.w3c.dom.Node top = node;
while (top.getParentNode() != null
&& top.getParentNode() instanceof org.w3c.dom.Element) {
top = top.getParentNode();
}
((org.w3c.dom.Element) top)
.setAttributeNS(
"http://www.w3.org/2000/xmlns/", "xmlns:" + prefix, namespace.getUri());
}
}
namespace.setPrefix(prefix);
}
