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netscape.ldap.util
Class DN

java.lang.Object
  |
  +--netscape.ldap.util.DN
public final class DN
extends java.lang.Object
implements java.io.Serializable

Objects of this class represent distinguished names (DN). A distinguished name is used to identify an entry in a directory.

The netscape.ldap.LDAPDN class uses this class internally. In most cases, when working with DNs in the LDAP Java classes, you should use the netscape.ldap.LDAPDN class.

The following DNs are examples of the different formats for DNs that may appear:

See Also:
LDAPDN, Serialized Form

Field Summary
static char[] ESCAPED_CHAR
          Array of the characters that may be escaped in a DN.
static int OSF
          Type specifying a DN in the OSF format.
static int RFC
          Type specifying a DN in the RFC format.
 
Constructor Summary
DN()
          Constructs an empty DN object.
DN(java.lang.String dn)
          Constructs a DN object from the specified distinguished name.
 
Method Summary
 void addRDN(RDN rdn)
          Adds the specified relative distinguished name (RDN) to the current DN.
 void addRDNToBack(RDN rdn)
          Adds the specified relative distinguished name (RDN) to the end of the current DN.
 void addRDNToFront(RDN rdn)
          Adds the specified relative distinguished name (RDN) to the beginning of the current DN.
 boolean contains(DN dn)
          Deprecated. Please use isDescendantOf() instead.
 int countRDNs()
          Returns the number of components that make up the current DN.
 boolean equals(DN dn)
          Determines if the current DN is equal to the specified DN.
 java.lang.String[] explodeDN(boolean noTypes)
          Returns an array of the individual components that make up the current distinguished name.
 int getDNType()
          Gets the type of format used for the DN (RFC format or OSF format).
 DN getParent()
          Gets the parent DN for this DN.
 java.util.Vector getRDNs()
          Returns a list of the components (RDN objects) that make up the current DN.
 boolean isDescendantOf(DN dn)
          Determines if this DN is a descendant of the given DN.
static boolean isDN(java.lang.String dn)
          Determines if the given string is an distinguished name or not.
 boolean isRFC()
          Determines if the DN is in RFC 1485 format.
 void setDNType(int type)
          Sets the type of format used for the DN (RFC format or OSF format).
 java.lang.String toOSFString()
          Returns the DN in OSF format.
 java.lang.String toRFCString()
          Returns the DN in RFC 1485 format.
 java.lang.String toString()
          Returns the string representation of the DN in its original format.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

RFC

public static int RFC
Type specifying a DN in the RFC format.

See Also:
getDNType(), setDNType(int)

OSF

public static int OSF
Type specifying a DN in the OSF format.

See Also:
getDNType(), setDNType(int)

ESCAPED_CHAR

public static final char[] ESCAPED_CHAR
Array of the characters that may be escaped in a DN.
Constructor Detail

DN

public DN()
Constructs an empty DN object.

DN

public DN(java.lang.String dn)
Constructs a DN object from the specified distinguished name. The string representation of the DN can be in RFC 1485 or OSF format.

Parameters:
dn - string representation of the distinguished name
Method Detail

addRDNToFront

public void addRDNToFront(RDN rdn)
Adds the specified relative distinguished name (RDN) to the beginning of the current DN.

Parameters:
rdn - the relative distinguished name to add to the beginning of the current DN
See Also:
RDN

addRDNToBack

public void addRDNToBack(RDN rdn)
Adds the specified relative distinguished name (RDN) to the end of the current DN.

Parameters:
rdn - the relative distinguished name to append to the current DN
See Also:
RDN

addRDN

public void addRDN(RDN rdn)
Adds the specified relative distinguished name (RDN) to the current DN. If the DN is in RFC 1485 format, the RDN is added to the beginning of the DN. If the DN is in OSF format, the RDN is appended to the end of the DN.

Parameters:
rdn - the relative distinguished name to add to the current DN
See Also:
RDN

setDNType

public void setDNType(int type)
Sets the type of format used for the DN (RFC format or OSF format).

Parameters:
type - one of the following constants: DN.RFC (to use the RFC format) or DN.OSF (to use the OSF format)
See Also:
getDNType(), RFC, OSF

getDNType

public int getDNType()
Gets the type of format used for the DN (RFC format or OSF format).

Returns:
one of the following constants: DN.RFC (if the DN is in RFC format) or DN.OSF (if the DN is in OSF format).
See Also:
setDNType(int), RFC, OSF

countRDNs

public int countRDNs()
Returns the number of components that make up the current DN.
Returns:
the number of components in this DN.

getRDNs

public java.util.Vector getRDNs()
Returns a list of the components (RDN objects) that make up the current DN.
Returns:
a list of the components of this DN.
See Also:
RDN

explodeDN

public java.lang.String[] explodeDN(boolean noTypes)
Returns an array of the individual components that make up the current distinguished name.
Parameters:
noTypes - specify true to remove the attribute type and equals sign (for example, "cn=") from each component

isRFC

public boolean isRFC()
Determines if the DN is in RFC 1485 format.
Returns:
true if the DN is in RFC 1485 format.

toRFCString

public java.lang.String toRFCString()
Returns the DN in RFC 1485 format.
Returns:
the DN in RFC 1485 format.

toOSFString

public java.lang.String toOSFString()
Returns the DN in OSF format.
Returns:
the DN in OSF format.

toString

public java.lang.String toString()
Returns the string representation of the DN in its original format. (For example, if the DN object was constructed from a DN in RFC 1485 format, this method returns the DN in RFC 1485 format.
Overrides:
toString in class java.lang.Object
Returns:
the string representation of the DN.

isDN

public static boolean isDN(java.lang.String dn)
Determines if the given string is an distinguished name or not.
Parameters:
dn - distinguished name
Returns:
true or false.

equals

public boolean equals(DN dn)
Determines if the current DN is equal to the specified DN.
Parameters:
dn - DN to compare against the current DN
Returns:
true if the two DNs are the same.

getParent

public DN getParent()
Gets the parent DN for this DN.

For example, the following section of code gets the parent DN of "uid=bjensen, ou=People, o=Airius.com." 

    DN dn = new DN("uid=bjensen, ou=People, o=Airius.com");
    DN parent = dn.getParent();
The parent DN in this example is "ou=People, o=Airius.com".

Returns:
DN of the parent of this DN.

contains

public boolean contains(DN dn)
Deprecated. Please use isDescendantOf() instead.

Determines if the given DN is under the subtree defined by this DN.

For example, the following section of code determines if the DN specified by dn1 is under the subtree specified by dn2. 

    DN dn1 = new DN("uid=bjensen, ou=People, o=Airius.com");
    DN dn2 = new DN("ou=People, o=Airius.com");
    boolean isContain = dn1.contains(dn2)
In this case, since "uid=bjensen, ou=People, o=Airius.com" is an entry under the subtree "ou=People, o=Airius.com", the value of isContain is true.

Parameters:
dn - the DN of a subtree to check
Returns:
true if the current DN belongs to the subtree specified by dn.

isDescendantOf

public boolean isDescendantOf(DN dn)
Determines if this DN is a descendant of the given DN.

For example, the following section of code determines if the DN specified by dn1 is a descendant of the DN specified by dn2. 

    DN dn1 = new DN("uid=bjensen, ou=People, o=Airius.com");
    DN dn2 = new DN("ou=People, o=Airius.com");
    boolean isDescendant = dn1.isDescendantOf(dn2)
In this case, since "uid=bjensen, ou=People, o=Airius.com" is an entry under the subtree "ou=People, o=Airius.com", the value of isDescendant is true.

In the case where the given DN is equal to this DN it returns false.

Parameters:
dn - the DN of a subtree to check
Returns:
true if the current DN is a descendant of the DN specified by dn.
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LDAPJDK 4.1
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