/**
* Adds a stanza(/packet) extension to the packet. Does nothing if extension is null.
*
* @param extension a stanza(/packet) extension.
*/
public void addExtension(ExtensionElement extension) {
if (extension == null) return;
String key = XmppStringUtils.generateKey(extension.getElementName(), extension.getNamespace());
synchronized (packetExtensions) {
packetExtensions.put(key, extension);
}
}
/**
* Returns the extension sub-packets (including properties data) as an XML String, or the Empty
* String if there are no stanza(/packet) extensions.
*
* @return the extension sub-packets as XML or the Empty String if there are no stanza(/packet)
* extensions.
*/
protected final XmlStringBuilder getExtensionsXML() {
XmlStringBuilder xml = new XmlStringBuilder();
// Add in all standard extension sub-packets.
for (ExtensionElement extension : getExtensions()) {
xml.append(extension.toXML());
}
return xml;
}
/**
* Check if a stanza(/packet) extension with the given namespace exists.
*
* @param namespace
* @return true if a stanza(/packet) extension exists, false otherwise.
*/
public boolean hasExtension(String namespace) {
synchronized (packetExtensions) {
for (ExtensionElement packetExtension : packetExtensions.values()) {
if (packetExtension.getNamespace().equals(namespace)) {
return true;
}
}
}
return false;
}
/**
* Removes a stanza(/packet) extension from the packet.
*
* @param extension the stanza(/packet) extension to remove.
* @return the removed stanza(/packet) extension or null.
*/
public ExtensionElement removeExtension(ExtensionElement extension) {
return removeExtension(extension.getElementName(), extension.getNamespace());
}
