Overview  Package   Class  Use  Deprecated  Index
Home >> All >> [ jsdsi overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

jsdsi
Class Sequence  

java.lang.Object
  jsdsi.Obj
      jsdsi.Sequence

---

public class Sequence

extends Obj

A sequence of SPKI/SDSI objects, typically used to present certs and validators that prove a particular statement.

Version:

$Revision: 1.2 $ $Date: 2003/05/07 19:36:41 $

---

Field Summary
private  Element[]	elements           Elements of this Sequence.

 

Constructor Summary

Sequence(Element[] e)           Creates a new Sequence from a given array of elements.

 

Method Summary
Sequence	concat(Sequence s)           Concatenates this Sequence with a given one.
boolean	equals(java.lang.Object o)           Determine whether this Object is semantically equal to another Object.
Element[]	getElements()           Returns the elements of this Sequence.
int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.
(package private) static Sequence	parseSequence(SexpList l)
SexpList	toSexp()           Creates an SexpList-representation from this SDSI-object.

 

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

elements

private final Element[] elements

Elements of this Sequence.

Constructor Detail

Sequence

public Sequence(Element[] e)

Creates a new Sequence from a given array of elements.

Method Detail

getElements

public Element[] getElements()

Returns the elements of this Sequence.

---

concat

public Sequence concat(Sequence s)

Concatenates this Sequence with a given one.

---

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 class Obj

---

parseSequence

static Sequence parseSequence(SexpList l)
                       throws SexpParseException

---

Overview  Package   Class  Use  Deprecated  Index
Home >> All >> [ jsdsi overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---