/**
* Add {@link DiscoverInfo} to our caps database.
*
* <p><b>Warning</b>: The specified <tt>DiscoverInfo</tt> is trusted to be valid with respect to
* the specified <tt>Caps</tt> for performance reasons because the <tt>DiscoverInfo</tt> should
* have already been validated in order to be used elsewhere anyway.
*
* @param caps the <tt>Caps<tt/> i.e. the node, the hash and the ver for which a
* <tt>DiscoverInfo</tt> is to be added to our caps database.
* @param info {@link DiscoverInfo} for the specified <tt>Caps</tt>.
*/
public static void addDiscoverInfoByCaps(Caps caps, DiscoverInfo info) {
cleanupDiscoverInfo(info);
/*
* DiscoverInfo carries the node we're now associating it with a
* specific node so we'd better keep them in sync.
*/
info.setNode(caps.getNodeVer());
synchronized (caps2discoverInfo) {
DiscoverInfo oldInfo = caps2discoverInfo.put(caps, info);
/*
* If the specified info is a new association for the specified
* node, remember it across application instances in order to not
* query for it over the network.
*/
if ((oldInfo == null) || !oldInfo.equals(info)) {
String xml = info.getChildElementXML();
if ((xml != null) && (xml.length() != 0)) {
getConfigService().setProperty(getCapsPropertyName(caps), xml);
}
}
}
}
/**
* Determines whether a specific <tt>DiscoverInfo</tt> is valid according to this <tt>Caps</tt>
* i.e. whether the <tt>discoverInfo</tt> has the node and the ver of this <tt>Caps</tt> and the
* ver calculated from the <tt>discoverInfo</tt> using the hash (algorithm) of this
* <tt>Caps</tt> is equal to the ver of this <tt>Caps</tt>.
*
* @param discoverInfo the <tt>DiscoverInfo</tt> to be validated by this <tt>Caps</tt>
* @return <tt>true</tt> if the specified <tt>DiscoverInfo</tt> has the node and the ver of this
* <tt>Caps</tt> and the ver calculated from the <tt>discoverInfo</tt> using the hash
* (algorithm) of this <tt>Caps</tt> is equal to the ver of this <tt>Caps</tt>; otherwise,
* <tt>false</tt>
*/
public boolean isValid(DiscoverInfo discoverInfo) {
if (discoverInfo != null) {
// The "node" attribute is not necessary in the query element.
// For example, Swift does not send back the "node" attribute in
// the Disco#info response. Thus, if the node of the IQ response
// is null, then we set it to the request one.
if (discoverInfo.getNode() == null) {
discoverInfo.setNode(getNodeVer());
}
if (getNodeVer().equals(discoverInfo.getNode())
&& !hash.equals("")
&& ver.equals(capsToHash(hash, calculateEntityCapsString(discoverInfo)))) {
return true;
}
}
return false;
}
/**
* Set our own caps version.
*
* @param discoverInfo the {@link DiscoverInfo} that we'd like to map to the <tt>capsVersion</tt>.
* @param capsVersion the new caps version
*/
public void setCurrentCapsVersion(DiscoverInfo discoverInfo, String capsVersion) {
Caps caps = new Caps(getNode(), CapsPacketExtension.HASH_METHOD, capsVersion, null);
/*
* DiscoverInfo carries the node and the ver and we're now setting a new
* ver so we should update the DiscoveryInfo.
*/
discoverInfo.setNode(caps.getNodeVer());
if (!caps.isValid(discoverInfo)) {
throw new IllegalArgumentException(
"The specified discoverInfo must be valid with respect"
+ " to the specified capsVersion");
}
currentCapsVersion = capsVersion;
addDiscoverInfoByCaps(caps, discoverInfo);
fireCapsVerChanged();
}