public class LdapName extends Object implements Name
This class represents a distinguished name as specified by RFC 2253. A distinguished name, or DN, is composed of an ordered list of components called relative distinguished names, or RDNs. Details of a DN's syntax are described in RFC 2253.
This class resolves a few ambiguities found in RFC 2253 as follows:
String names passed to LdapName or returned by it use the full Unicode character set. They may also contain characters encoded into UTF-8 with each octet represented by a three-character substring such as "\\B4". They may not, however, contain characters encoded into UTF-8 with each octet represented by a single character in the string: the meaning would be ambiguous.
LdapName will properly parse all valid names, but does not attempt to detect all possible violations when parsing invalid names. It is "generous" in accepting invalid names. The "validity" of a name is determined ultimately when it is supplied to an LDAP server, which may accept or reject the name based on factors such as its schema information and interoperability considerations.
When names are tested for equality, attribute types, both binary and string values, are case-insensitive. String values with different but equivalent usage of quoting, escaping, or UTF8-hex-encoding are considered equal. The order of components in multi-valued RDNs (such as "ou=Sales+cn=Bob") is not significant.
The components of a LDAP name, that is, RDNs, are numbered. The indexes of a LDAP name with n RDNs range from 0 to n-1. This range may be written as [0,n). The right most RDN is at index 0, and the left most RDN is at index n-1. For example, the distinguished name: "CN=Steve Kille, O=Isode Limited, C=GB" is numbered in the following sequence ranging from 0 to 2: {C=GB, O=Isode Limited, CN=Steve Kille}. An empty LDAP name is represented by an empty RDN list.
Concurrent multithreaded read-only access of an instance of LdapName need not be synchronized.
Unless otherwise noted, the behavior of passing a null argument to a constructor or method in this class will cause a NullPointerException to be thrown.
public LdapName(String name)
throws InvalidNameException Constructs an LDAP name from the given distinguished name.
name - This is a non-null distinguished name formatted according to the rules defined in RFC 2253.InvalidNameException - if a syntax violation is detected.Rdn.escapeValue(Object value)public LdapName(List<Rdn> rdns)
Constructs an LDAP name given its parsed RDN components.
The indexing of RDNs in the list follows the numbering of RDNs described in the class description.
rdns - The non-null list of Rdns forming this LDAP name.public int size()
Retrieves the number of components in this LDAP name.
size in interface Name
public boolean isEmpty()
Determines whether this LDAP name is empty. An empty name is one with zero components.
public Enumeration<String> getAll()
Retrieves the components of this name as an enumeration of strings. The effect of updates to this name on this enumeration is undefined. If the name has zero components, an empty (non-null) enumeration is returned. The order of the components returned by the enumeration is same as the order in which the components are numbered as described in the class description.
getAll in interface Name
public String get(int posn)
Retrieves a component of this LDAP name as a string.
get in interface Name
posn - The 0-based index of the component to retrieve. Must be in the range [0,size()).IndexOutOfBoundsException - if posn is outside the specified range.public Rdn getRdn(int posn)
Retrieves an RDN of this LDAP name as an Rdn.
posn - The 0-based index of the RDN to retrieve. Must be in the range [0,size()).IndexOutOfBoundsException - if posn is outside the specified range.public Name getPrefix(int posn)
Creates a name whose components consist of a prefix of the components of this LDAP name. Subsequent changes to this name will not affect the name that is returned and vice versa.
getPrefix in interface Name
posn - The 0-based index of the component at which to stop. Must be in the range [0,size()].LdapName consisting of the components at indexes in the range [0,posn). If posn is zero, an empty LDAP name is returned.IndexOutOfBoundsException - If posn is outside the specified range.public Name getSuffix(int posn)
Creates a name whose components consist of a suffix of the components in this LDAP name. Subsequent changes to this name do not affect the name that is returned and vice versa.
getSuffix in interface Name
posn - The 0-based index of the component at which to start. Must be in the range [0,size()].LdapName consisting of the components at indexes in the range [posn,size()). If posn is equal to size(), an empty LDAP name is returned.IndexOutOfBoundsException - If posn is outside the specified range.public boolean startsWith(Name n)
Determines whether this LDAP name starts with a specified LDAP name prefix. A name n is a prefix if it is equal to getPrefix(n.size())--in other words this LDAP name starts with 'n'. If n is null or not a RFC2253 formatted name as described in the class description, false is returned.
startsWith in interface Name
n - The LDAP name to check.n is a prefix of this LDAP name, false otherwise.getPrefix(int posn)public boolean startsWith(List<Rdn> rdns)
Determines whether the specified RDN sequence forms a prefix of this LDAP name. Returns true if this LdapName is at least as long as rdns, and for every position p in the range [0, rdns.size()) the component getRdn(p) matches rdns.get(p). Returns false otherwise. If rdns is null, false is returned.
rdns - The sequence of Rdns to check.rdns form a prefix of this LDAP name, false otherwise.public boolean endsWith(Name n)
Determines whether this LDAP name ends with a specified LDAP name suffix. A name n is a suffix if it is equal to getSuffix(size()-n.size())--in other words this LDAP name ends with 'n'. If n is null or not a RFC2253 formatted name as described in the class description, false is returned.
endsWith in interface Name
n - The LDAP name to check.n is a suffix of this name, false otherwise.getSuffix(int posn)public boolean endsWith(List<Rdn> rdns)
Determines whether the specified RDN sequence forms a suffix of this LDAP name. Returns true if this LdapName is at least as long as rdns, and for every position p in the range [size() - rdns.size(), size()) the component getRdn(p) matches rdns.get(p). Returns false otherwise. If rdns is null, false is returned.
rdns - The sequence of Rdns to check.rdns form a suffix of this LDAP name, false otherwise.public Name addAll(Name suffix)
throws InvalidNameException Adds the components of a name -- in order -- to the end of this name.
addAll in interface Name
suffix - The non-null components to add.InvalidNameException - if suffix is not a valid LDAP name, or if the addition of the components would violate the syntax rules of this LDAP name.public Name addAll(List<Rdn> suffixRdns)
Adds the RDNs of a name -- in order -- to the end of this name.
suffixRdns - The non-null suffix Rdns to add.public Name addAll(int posn,
Name suffix)
throws InvalidNameException Adds the components of a name -- in order -- at a specified position within this name. Components of this LDAP name at or after the index (if any) of the first new component are shifted up (away from index 0) to accommodate the new components.
addAll in interface Name
suffix - The non-null components to add.posn - The index at which to add the new component. Must be in the range [0,size()].InvalidNameException - if suffix is not a valid LDAP name, or if the addition of the components would violate the syntax rules of this LDAP name.IndexOutOfBoundsException - If posn is outside the specified range.public Name addAll(int posn,
List<Rdn> suffixRdns) Adds the RDNs of a name -- in order -- at a specified position within this name. RDNs of this LDAP name at or after the index (if any) of the first new RDN are shifted up (away from index 0) to accommodate the new RDNs.
suffixRdns - The non-null suffix Rdns to add.posn - The index at which to add the suffix RDNs. Must be in the range [0,size()].IndexOutOfBoundsException - If posn is outside the specified range.public Name add(String comp)
throws InvalidNameException Adds a single component to the end of this LDAP name.
add in interface Name
comp - The non-null component to add.InvalidNameException - If adding comp at end of the name would violate the name's syntax.public Name add(Rdn comp)
Adds a single RDN to the end of this LDAP name.
comp - The non-null RDN to add.public Name add(int posn,
String comp)
throws InvalidNameException Adds a single component at a specified position within this LDAP name. Components of this LDAP name at or after the index (if any) of the new component are shifted up by one (away from index 0) to accommodate the new component.
add in interface Name
comp - The non-null component to add.posn - The index at which to add the new component. Must be in the range [0,size()].IndexOutOfBoundsException - If posn is outside the specified range.InvalidNameException - If adding comp at the specified position would violate the name's syntax.public Name add(int posn,
Rdn comp) Adds a single RDN at a specified position within this LDAP name. RDNs of this LDAP name at or after the index (if any) of the new RDN are shifted up by one (away from index 0) to accommodate the new RDN.
comp - The non-null RDN to add.posn - The index at which to add the new RDN. Must be in the range [0,size()].IndexOutOfBoundsException - If posn is outside the specified range.public Object remove(int posn)
throws InvalidNameException Removes a component from this LDAP name. The component of this name at the specified position is removed. Components with indexes greater than this position (if any) are shifted down (toward index 0) by one.
remove in interface Name
posn - The index of the component to remove. Must be in the range [0,size()).IndexOutOfBoundsException - if posn is outside the specified range.InvalidNameException - if deleting the component would violate the syntax rules of the name.public List<Rdn> getRdns()
Retrieves the list of relative distinguished names. The contents of the list are unmodifiable. The indexing of RDNs in the returned list follows the numbering of RDNs as described in the class description. If the name has zero components, an empty list is returned.
Rdn.public Object clone()
Generates a new copy of this name. Subsequent changes to the components of this name will not affect the new copy, and vice versa.
clone in interface Name
clone in class Object
Cloneablepublic String toString()
Returns a string representation of this LDAP name in a format defined by RFC 2253 and described in the class description. If the name has zero components an empty string is returned.
public boolean equals(Object obj)
Determines whether two LDAP names are equal. If obj is null or not an LDAP name, false is returned.
Two LDAP names are equal if each RDN in one is equal to the corresponding RDN in the other. This implies both have the same number of RDNs, and each RDN's equals() test against the corresponding RDN in the other name returns true. See Rdn.equals(Object obj) for a definition of RDN equality.
equals in class Object
obj - The possibly null object to compare against.hashCode()public int compareTo(Object obj)
Compares this LdapName with the specified Object for order. Returns a negative integer, zero, or a positive integer as this Name is less than, equal to, or greater than the given Object.
If obj is null or not an instance of LdapName, ClassCastException is thrown.
Ordering of LDAP names follows the lexicographical rules for string comparison, with the extension that this applies to all the RDNs in the LDAP name. All the RDNs are lined up in their specified order and compared lexicographically. See Rdn.compareTo(Object obj) for RDN comparison rules.
If this LDAP name is lexicographically lesser than obj, a negative number is returned. If this LDAP name is lexicographically greater than obj, a positive number is returned.
compareTo in interface Comparable<Object>
compareTo in interface Name
obj - The non-null LdapName instance to compare against.ClassCastException - if obj is null or not a LdapName.Comparable.compareTo(Object)public int hashCode()
Computes the hash code of this LDAP name. The hash code is the sum of the hash codes of individual RDNs of this name.
hashCode in class Object
equals(java.lang.Object)
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