@Override
    public void propertySet(String property, Map<String, Object> params) {
        if ("ldap.vcard-mapping".equals(property)) {
            initTemplate();
            // Reset cache of vCards
            VCardManager.getInstance().reset();
        }
    }
Returns true or false if the change to the existing vcard is valid (only to PHOTO element)

@param username User who's LDAP-based vcard we will compare with.
@param newvCard New vCard Element we will compare against.
@return True or false if the changes made were valid (only to PHOTO element)
xmppserver/src/main/java/org/jivesoftware/openfire/ldap/LdapVCardProvider.java