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jsdsi
Class Acl  

java.lang.Object
  jsdsi.Obj
      jsdsi.Acl

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public class Acl

extends Obj

An access control list (ACL) that restricts access to an object on the local system. The ACL contains a set of ACL entries that specify which principals may access the object and how.

Version:

$Revision: 1.2 $ $Date: 2003/04/22 21:37:40 $

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Field Summary
private  AclEntry[]	entries           The entries the Acl consists of.

 

Constructor Summary

Acl(AclEntry[] e)           Constructs a new Acl from given AclEntrys.

 

Method Summary
boolean	equals(java.lang.Object o)           Determine whether this Object is semantically equal to another Object.
AclEntry[]	getEntries()           Returns an array of AclEntrys.
int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.
(package private) static Acl	parseAcl(SexpList l)
SexpList	toSexp()           Converts this Acl to an SecpList.

 

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

entries

private final AclEntry[] entries

The entries the Acl consists of.

Constructor Detail

Acl

public Acl(AclEntry[] e)

Constructs a new Acl from given AclEntrys.

Method Detail

getEntries

public AclEntry[] getEntries()

Returns an array of AclEntrys.

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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

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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

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toSexp

public SexpList toSexp()

Converts this Acl to an SecpList.

Specified by:

toSexp in class Obj

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parseAcl

static Acl parseAcl(SexpList l)
             throws SexpParseException

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