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jsdsi
Class Name

java.lang.Object
  jsdsi.Obj
      jsdsi.Name

All Implemented Interfaces:: Subject

public class Name
extends Obj
implements Subject

A SDSI name: a principal and a sequence of strings. If the sequence contains just one string, this is a local name; otherwise this is an extended name.

Version:: $Revision: 1.2 $ $Date: 2003/04/22 21:37:44 $

Nested Class Summary

Nested classes inherited from class jsdsi.Subject

Subject.Default

Field Summary

private Principal issuer
          Principal of this Name.

private java.lang.String[] names
          The name string(s) for this name (more than one string for an extended name).

Constructor Summary

Name(Principal i, java.lang.String n)
          Creates a new local name from a given principal and name-string.

Name(Principal i, java.lang.String[] n)
          Creates a new Name for a given principal and an array of name-strings.

Method Summary

boolean equals(java.lang.Object o)
          Determine whether this Object is semantically equal to another Object.

Principal getIssuer()
          Returns the principal of the Name.

java.lang.String[] getNames()
          Returns an array of name-strings of this Name (the array has a length of one in the case of a local name, and greater then 1 for extended names).

int hashCode()
          Get a value that represents this Object, as uniquely as possible within the confines of an int.

(package private) static Name parseName(SexpList l)
          Parses an SexpList to create a Name from it.

(package private) static Name parseName(SexpList l, Principal issuerParam)
          Parses a name from a given SexpList and Principal.

Name prefix()
          Returns the local name of this name, that is a Name for this Names issuer with the first name-string of the list of names.

Name prefix(int i)
          Creates a new Name from this Name using only the first i name-strings.

boolean prefixOf(Name n)
          Checks if a given Name has the same issuer (principal) as this Name and if the name-strings are equal to this name's name-strings (a smaller number of name-strings are okay).

SexpList toSexp()
          Creates an SexpList-representation from this SDSI-object.

SexpList toSexp(Principal iss)
          Returns an SexpList-representation of the given Principal.

Methods inherited from class jsdsi.Obj

parseObj, toByteArray, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

issuer

private final Principal issuer

Principal of this Name.

names

private final java.lang.String[] names

The name string(s) for this name (more than one string for an extended name).

Constructor Detail

Name

public Name(Principal i,
            java.lang.String[] n)

Creates a new Name for a given principal and an array of name-strings.

Name

public Name(Principal i,
            java.lang.String n)

Creates a new local name from a given principal and name-string.

Method Detail

getIssuer

public Principal getIssuer()

Returns the principal of the Name.

getNames

public java.lang.String[] getNames()

Returns an array of name-strings of this Name (the array has a length of one in the case of a local name, and greater then 1 for extended names).

prefixOf

public boolean prefixOf(Name n)

Checks if a given Name has the same issuer (principal) as this Name and if the name-strings are equal to this name's name-strings (a smaller number of name-strings are okay).

prefix

public Name prefix(int i)

Creates a new Name from this Name using only the first i name-strings.

prefix

public Name prefix()

Returns the local name of this name, that is a Name for this Names issuer with the first name-string of the list of names.

equals

public boolean equals(java.lang.Object o)

Description copied from class: java.lang.Object

Determine whether this Object is semantically equal to another Object.

There are some fairly strict requirements on this method which subclasses must follow:

It must be transitive. If a.equals(b) and b.equals(c), then a.equals(c) must be true as well.
It must be symmetric. a.equals(b) and b.equals(a) must have the same value.
It must be reflexive. a.equals(a) must always be true.
It must be consistent. Whichever value a.equals(b) returns on the first invocation must be the value returned on all later invocations.
a.equals(null) must be false.
It must be consistent with hashCode(). That is, a.equals(b) must imply a.hashCode() == b.hashCode(). The reverse is not true; two objects that are not equal may have the same hashcode, but that has the potential to harm hashing performance.

This is typically overridden to throw a java.lang.ClassCastException if the argument is not comparable to the class performing the comparison, but that is not a requirement. It is legal for a.equals(b) to be true even though a.getClass() != b.getClass(). Also, it is typical to never cause a java.lang.NullPointerException.

In general, the Collections API (java.util) use the equals method rather than the == operator to compare objects. However, java.util.IdentityHashMap is an exception to this rule, for its own good reasons.

The default implementation returns this == o.

Specified by:: equals in class Obj

hashCode

public int hashCode()

Description copied from class: java.lang.Object

Get a value that represents this Object, as uniquely as possible within the confines of an int.

There are some requirements on this method which subclasses must follow:

Semantic equality implies identical hashcodes. In other words, if a.equals(b) is true, then a.hashCode() == b.hashCode() must be as well. However, the reverse is not necessarily true, and two objects may have the same hashcode without being equal.
It must be consistent. Whichever value o.hashCode() returns on the first invocation must be the value returned on all later invocations as long as the object exists. Notice, however, that the result of hashCode may change between separate executions of a Virtual Machine, because it is not invoked on the same object.

Notice that since hashCode is used in java.util.Hashtable and other hashing classes, a poor implementation will degrade the performance of hashing (so don't blindly implement it as returning a constant!). Also, if calculating the hash is time-consuming, a class may consider caching the results.

The default implementation returns System.identityHashCode(this)

Specified by:: hashCode in class Obj

toSexp

public SexpList toSexp()

Description copied from class: Obj

Creates an SexpList-representation from this SDSI-object.

Specified by:: toSexp in interface Subject
Specified by:: toSexp in class Obj

toSexp

public SexpList toSexp(Principal iss)

Returns an SexpList-representation of the given Principal.

parseName

static Name parseName(SexpList l)
               throws SexpParseException

Parses an SexpList to create a Name from it.

parseName

static Name parseName(SexpList l,
                      Principal issuerParam)
               throws SexpParseException

Parses a name from a given SexpList and Principal.

Overview

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Field Summary
`private Principal`	`issuer` Principal of this Name.
`private java.lang.String[]`	`names` The name string(s) for this name (more than one string for an extended name).

Constructor Summary
`Name(Principal i, java.lang.String n)` Creates a new local name from a given principal and name-string.
`Name(Principal i, java.lang.String[] n)` Creates a new `Name` for a given principal and an array of name-strings.

Method Summary
`boolean`	`equals(java.lang.Object o)` Determine whether this Object is semantically equal to another Object.
`Principal`	`getIssuer()` Returns the principal of the `Name`.
`java.lang.String[]`	`getNames()` Returns an array of name-strings of this `Name` (the array has a length of one in the case of a local name, and greater then 1 for extended names).
`int`	`hashCode()` Get a value that represents this Object, as uniquely as possible within the confines of an int.
`(package private) static Name`	`parseName(SexpList l)` Parses an `SexpList` to create a `Name` from it.
`(package private) static Name`	`parseName(SexpList l, Principal issuerParam)` Parses a name from a given `SexpList` and `Principal`.
`Name`	`prefix()` Returns the local name of this name, that is a `Name` for this `Name`s issuer with the first name-string of the list of names.
`Name`	`prefix(int i)` Creates a new `Name` from this `Name` using only the first `i` name-strings.
`boolean`	`prefixOf(Name n)` Checks if a given `Name` has the same issuer (principal) as this `Name` and if the name-strings are equal to this name's name-strings (a smaller number of name-strings are okay).
`SexpList`	`toSexp()` Creates an `SexpList`-representation from this SDSI-object.
`SexpList`	`toSexp(Principal iss)` Returns an `SexpList`-representation of the given `Principal`.

jsdsi Class Name

issuer

names

Name

Name

getIssuer

getNames

prefixOf

prefix

prefix

equals

hashCode

toSexp

toSexp

parseName

parseName

jsdsi
Class Name