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KerberosPrincipal (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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javax.security.auth.kerberos
Class KerberosPrincipal

java.lang.Object
  extended by javax.security.auth.kerberos.KerberosPrincipal
All Implemented Interfaces:
Serializable, Principal
public final class KerberosPrincipal
extends Object
implements Principal, Serializable

This class encapsulates a Kerberos principal.

Since:
1.4
See Also:
Serialized Form

Field Summary
static int KRB_NT_PRINCIPAL
          user principal name type.
static int KRB_NT_SRV_HST
          service with host name as instance (telnet, rcommands) name type.
static int KRB_NT_SRV_INST
          service and other unique instance (krbtgt) name type.
static int KRB_NT_SRV_XHST
          service with host as remaining components name type.
static int KRB_NT_UID
          unique ID name type.
static int KRB_NT_UNKNOWN
          unknown name type.
 
Constructor Summary
KerberosPrincipal(String name)
          Constructs a KerberosPrincipal from the provided string input.
KerberosPrincipal(String name, int nameType)
          Constructs a KerberosPrincipal from the provided string and name type input.
 
Method Summary
 boolean equals(Object other)
          Compares the specified Object with this Principal for equality.
 String getName()
          The returned string corresponds to the single-string representation of a Kerberos Principal name as specified in Section 2.1 of RFC 1964.
 int getNameType()
          Returns the name type of the KerberosPrincipal.
 String getRealm()
          Returns the realm component of this Kerberos principal.
 int hashCode()
          Returns a hashcode for this principal.
 String toString()
          Returns a string representation of the object.
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 

Field Detail

KRB_NT_UNKNOWN

public static final int KRB_NT_UNKNOWN
unknown name type.

See Also:
Constant Field Values

KRB_NT_PRINCIPAL

public static final int KRB_NT_PRINCIPAL
user principal name type.

See Also:
Constant Field Values

KRB_NT_SRV_INST

public static final int KRB_NT_SRV_INST
service and other unique instance (krbtgt) name type.

See Also:
Constant Field Values

KRB_NT_SRV_HST

public static final int KRB_NT_SRV_HST
service with host name as instance (telnet, rcommands) name type.

See Also:
Constant Field Values

KRB_NT_SRV_XHST

public static final int KRB_NT_SRV_XHST
service with host as remaining components name type.

See Also:
Constant Field Values

KRB_NT_UID

public static final int KRB_NT_UID
unique ID name type.

See Also:
Constant Field Values
Constructor Detail

KerberosPrincipal

public KerberosPrincipal(String name)
Constructs a KerberosPrincipal from the provided string input. The name type for this principal defaults to KRB_NT_PRINCIPAL This string is assumed to contain a name in the format that is specified in Section 2.1.1. (Kerberos Principal Name Form) of RFC 1964 (for example, duke@FOO.COM, where duke represents a principal, and FOO.COM represents a realm).

If the input name does not contain a realm, the default realm is used. The default realm can be specified either in a Kerberos configuration file or via the java.security.krb5.realm system property. For more information, Kerberos Requirements

Parameters:
name - the principal name
Throws:
IllegalArgumentException - if name is improperly formatted, if name is null, or if name does not contain the realm to use and the default realm is not specified in either a Kerberos configuration file or via the java.security.krb5.realm system property.

KerberosPrincipal

public KerberosPrincipal(String name,
                         int nameType)
Constructs a KerberosPrincipal from the provided string and name type input. The string is assumed to contain a name in the format that is specified in Section 2.1 (Mandatory Name Forms) of RFC 1964. Valid name types are specified in Section 7.2 (Principal Names) of RFC 1510. The input name must be consistent with the provided name type. (for example, duke@FOO.COM, is a valid input string for the name type, KRB_NT_PRINCIPAL where duke represents a principal, and FOO.COM represents a realm).

If the input name does not contain a realm, the default realm is used. The default realm can be specified either in a Kerberos configuration file or via the java.security.krb5.realm system property. For more information, see Kerberos Requirements.

Parameters:
name - the principal name
nameType - the name type of the principal
Throws:
IllegalArgumentException - if name is improperly formatted, if name is null, if the nameType is not supported, or if name does not contain the realm to use and the default realm is not specified in either a Kerberos configuration file or via the java.security.krb5.realm system property.
Method Detail

getRealm

public String getRealm()
Returns the realm component of this Kerberos principal.

Returns:
the realm component of this Kerberos principal.

hashCode

public int hashCode()
Returns a hashcode for this principal. The hash code is defined to be the result of the following calculation: 

  hashCode = getName().hashCode();

Specified by:
hashCode in interface Principal
Overrides:
hashCode in class Object
Returns:
a hashCode() for the KerberosPrincipal
See Also:
Object.equals(java.lang.Object), Hashtable

equals

public boolean equals(Object other)
Compares the specified Object with this Principal for equality. Returns true if the given object is also a KerberosPrincipal and the two KerberosPrincipal instances are equivalent. More formally two KerberosPrincipal instances are equal if the values returned by getName() are equal and the values returned by getNameType() are equal.

Specified by:
equals in interface Principal
Overrides:
equals in class Object
Parameters:
other - the Object to compare to
Returns:
true if the Object passed in represents the same principal as this one, false otherwise.
See Also:
Object.hashCode(), Hashtable

getName

public String getName()
The returned string corresponds to the single-string representation of a Kerberos Principal name as specified in Section 2.1 of RFC 1964.

Specified by:
getName in interface Principal
Returns:
the principal name.

getNameType

public int getNameType()
Returns the name type of the KerberosPrincipal. Valid name types are specified in Section 7.2 of RFC1510.

Returns:
the name type.

toString

public String toString()
Description copied from class: Object
Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of: 

 getClass().getName() + '@' + Integer.toHexString(hashCode())

Specified by:
toString in interface Principal
Overrides:
toString in class Object
Returns:
a string representation of the object.
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