/**
* 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;
}
