org.jxmpp.util

Class XmppStringUtils

java.lang.Object

org.jxmpp.util.XmppStringUtils

public class XmppStringUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
XmppStringUtils()

Method Summary

Modifier and Type	Method and Description
static String	completeJidFrom(CharSequence localpart, CharSequence domainpart)
static String	completeJidFrom(CharSequence localpart, CharSequence domainpart, CharSequence resource)
static String	completeJidFrom(String localpart, String domainpart)
static String	completeJidFrom(String localpart, String domainpart, String resource)
static String	escapeLocalpart(String localpart) Escapes the localpart of a JID according to "JID Escaping" (XEP-0106).
static String	generateKey(String element, String namespace) Generate a unique key from a element name and namespace.
static boolean	isBareJid(String jid) Returns true if jid is a bare JID ("foo@bar.com").
static boolean	isFullJID(String jid) Returns true if jid is a full JID (i.e.
static String	parseBareAddress(String jid) Deprecated. use parseBareJid(String) instead
static String	parseBareJid(String jid) Returns the JID with any resource information removed.
static String	parseDomain(String jid) Returns the domain of an XMPP address (JID).
static String	parseLocalpart(String jid) Returns the localpart of an XMPP address (JID).
static String	parseResource(String jid) Returns the resource portion of an XMPP address (JID).
static String	unescapeLocalpart(String localpart) Un-escapes the localpart of a JID according to "JID Escaping" (XEP-0106).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

XmppStringUtils

public XmppStringUtils()

Method Detail

parseLocalpart

public static String parseLocalpart(String jid)

Returns the localpart of an XMPP address (JID). For example, for the address "user@xmpp.org/Resource", "user" would be returned. If jid is null, then this method returns also null. If the input String is no valid JID or has no localpart, then this method will return the empty String.

Parameters:

jid - the XMPP address to parse.

Returns:

the name portion of the XMPP address, the empty String or null.

parseDomain

public static String parseDomain(String jid)

Returns the domain of an XMPP address (JID). For example, for the address "user@xmpp.org/Resource", "xmpp.org" would be returned. If jid is null, then this method returns also null. If the input String is no valid JID or has no domainpart, then this method will return the empty String.

Parameters:

jid - the XMPP address to parse.

Returns:

the domainpart of the XMPP address, the empty String or null.

parseResource

public static String parseResource(String jid)

Returns the resource portion of an XMPP address (JID). For example, for the address "user@xmpp.org/Resource", "Resource" would be returned. If jid is null, then this method returns also null. If the input String is no valid JID or has no resourcepart, then this method will return the empty String.

Parameters:

jid - the XMPP address to parse.

Returns:

the resource portion of the XMPP address.

parseBareAddress

@Deprecated
public static String parseBareAddress(String jid)

Deprecated. use parseBareJid(String) instead

Returns the JID with any resource information removed. For example, for the address "matt@jivesoftware.com/Smack", "matt@jivesoftware.com" would be returned.

Parameters:

jid - the XMPP JID.

Returns:

the bare XMPP JID without resource information.

parseBareJid

public static String parseBareJid(String jid)

Returns the JID with any resource information removed. For example, for the address "matt@jivesoftware.com/Smack", "matt@jivesoftware.com" would be returned.

Parameters:

jid - the XMPP JID.

Returns:

the bare XMPP JID without resource information.

isFullJID

public static boolean isFullJID(String jid)

Returns true if jid is a full JID (i.e. a JID with resource part).

Parameters:

jid -

Returns:

true if full JID, false otherwise

isBareJid

public static boolean isBareJid(String jid)

Returns true if jid is a bare JID ("foo@bar.com").

This method may return true for Strings that are not valid JIDs (e.g. because of Stringprep violations). Consider using org.jxmpp.jid.util.JidUtil.validateBareJid(String) from jxmpp-jid instead of this method as it exceptions provide a meaningful message string why the JID is not a bare JID and will also check for Stringprep errors.

Parameters:

jid -

Returns:

true if bare JID, false otherwise

escapeLocalpart

public static String escapeLocalpart(String localpart)

Escapes the localpart of a JID according to "JID Escaping" (XEP-0106). Escaping replaces characters prohibited by Nodeprep with escape sequences, as follows:

Unescaped Character	Encoded Sequence
<space>	\20
"	\22
&	\26
'	\27
/	\2f
:	\3a
<	\3c
>	\3e
@	\40
\	\5c

This process is useful when the localpart comes from an external source that doesn't conform to Nodeprep. For example, a username in LDAP may be "Joe Smith". Because the <space> character isn't a valid part of a localpart, the username should be escaped to "Joe\20Smith" before being made into a JID (e.g. "joe\20smith@example.com" after case-folding, etc. has been applied).

All localpart escaping and un-escaping must be performed manually at the appropriate time; the JID class will not escape or un-escape automatically.

Parameters:

localpart - the localpart.

Returns:

the escaped version of the localpart.

See Also:

XEP-106: JID Escaping

unescapeLocalpart

public static String unescapeLocalpart(String localpart)

Un-escapes the localpart of a JID according to "JID Escaping" (XEP-0106). Escaping replaces characters prohibited by Nodeprep with escape sequences, as follows:

Unescaped Character	Encoded Sequence
<space>	\20
"	\22
&	\26
'	\27
/	\2f
:	\3a
<	\3c
>	\3e
@	\40
\	\5c

This process is useful when the localpart comes from an external source that doesn't conform to Nodeprep. For example, a username in LDAP may be "Joe Smith". Because the <space> character isn't a valid part of a localpart, the username should be escaped to "Joe\20Smith" before being made into a JID (e.g. "joe\20smith@example.com" after case-folding, etc. has been applied).

All localpart escaping and un-escaping must be performed manually at the appropriate time; the JID class will not escape or un-escape automatically.

Parameters:

localpart - the escaped version of the localpart.

Returns:

the un-escaped version of the localpart.

See Also:

XEP-106: JID Escaping

completeJidFrom

public static String completeJidFrom(CharSequence localpart,
                                     CharSequence domainpart)

completeJidFrom

public static String completeJidFrom(String localpart,
                                     String domainpart)

completeJidFrom

public static String completeJidFrom(CharSequence localpart,
                                     CharSequence domainpart,
                                     CharSequence resource)

completeJidFrom

public static String completeJidFrom(String localpart,
                                     String domainpart,
                                     String resource)

generateKey

public static String generateKey(String element,
                                 String namespace)

Generate a unique key from a element name and namespace. This key can be used to lookup element/namespace information. The key is simply generated by concatenating the strings as follows: element + '\t' + namespace.

The tab character (\t) was chosen because it will be normalized, i.e. replace by space, in attribute values. It therefore should never appear in element or namespace. For more information about the normalization, see the XML specification § 3.3.3 Attribute-Value Normalization.

Parameters:

element -

namespace -

Returns:

the unique key of element and namespace.