org.infoglue.cms.util
Class DomainUtils

java.lang.Object
  org.infoglue.cms.util.DomainUtils

public final class DomainUtils
extends java.lang.Object

Utility class for the domain objects. This class cannot be instantiated.

Author:

Frank Febbraro (frank@phase2technology.com)

Method Summary

static int	compare(java.lang.Comparable c1, java.lang.Comparable c2) Compares two comparable objects, considering the possibility that one or both may be null.
static boolean	equals(java.util.Collection c1, java.util.Collection c2) Compares two collections for equality, considering the possibility that one or both may be null.
static boolean	equals(java.lang.Object o1, java.lang.Object o2) Compares two objects for equality, considering the possibility that one or both may be null.
static int	hashCode(java.lang.Object s) Returns an appropriate hash code for the given object, considering the possibilty that the object may be null.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

equals

public static boolean equals(java.lang.Object o1,
                             java.lang.Object o2)

Compares two objects for equality, considering the possibility that one or both may be null.

Parameters:

o1 - an object

o2 - another object

Returns:

true if o1 is null and o1 == o2, or o1.equals(o2) returns true; otherwise returns false.

equals

public static boolean equals(java.util.Collection c1,
                             java.util.Collection c2)

Compares two collections for equality, considering the possibility that one or both may be null.

Parameters:

c1 - a collection

c2 - another collection

Returns:

true if c1.size() == c2.size(), c1.containsAll(c2), and c2.containsAll(c1). This keeps the semantics consistent across the various collection implementations.

compare

public static int compare(java.lang.Comparable c1,
                          java.lang.Comparable c2)

Compares two comparable objects, considering the possibility that one or both may be null.

Parameters:

c1 - an object

c2 - another object

Returns:

0 if o1 and 02 are null, -1 if c1 is not null and c2 is null, 1 if c1 is null and c2 is not null, or c1.compareTo(o2) otherwise.

hashCode

public static int hashCode(java.lang.Object s)

Returns an appropriate hash code for the given object, considering the possibilty that the object may be null.

Parameters:

s - a string

Returns:

if s is null, returns 0, otherwise returns s.hashCode().