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EqualityKeyComparator - JBoss RULES 3.0.6 API 英文版文档

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org.drools.common
Class EqualityKeyComparator

java.lang.Object
  org.drools.util.FastComparator
      org.drools.common.EqualityKeyComparator

All Implemented Interfaces:

java.io.Serializable, java.util.Comparator

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public class EqualityKeyComparator
extends FastComparator

See Also:

Serialized Form

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Field Summary

 

Fields inherited from class org.drools.util.FastComparator
DEFAULT, DIRECT, IDENTITY, LEXICAL, REHASH, REHASH_SYSTEM_HASHCODE

 

Constructor Summary
EqualityKeyComparator()

 

Method Summary
boolean	areEqual(java.lang.Object o1, java.lang.Object o2)           Equality key reverses the compare, so that the key controls the comparison
int	compare(java.lang.Object o1, java.lang.Object o2)           Compares the specified objects for order.
static EqualityKeyComparator	getInstance()
int	hashCodeOf(java.lang.Object obj)           Returns the hash code for the specified object (consistent with FastComparator.areEqual(java.lang.Object, java.lang.Object)).
java.lang.String	toString()

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

 

Methods inherited from interface java.util.Comparator
equals

 

Constructor Detail

EqualityKeyComparator

public EqualityKeyComparator()

Method Detail

getInstance

public static EqualityKeyComparator getInstance()

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hashCodeOf

public int hashCodeOf(java.lang.Object obj)

Description copied from class: FastComparator

Returns the hash code for the specified object (consistent with FastComparator.areEqual(java.lang.Object, java.lang.Object)). Two objects considered equal have the same hash code.

Specified by:

hashCodeOf in class FastComparator

Parameters:

obj - the object to return the hashcode for.

Returns:

the hashcode for the specified object.

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areEqual

public boolean areEqual(java.lang.Object o1,
                        java.lang.Object o2)

Equality key reverses the compare, so that the key controls the comparison

Specified by:

areEqual in class FastComparator

Parameters:

o1 - the first object (or null).

o2 - the second object (or null).

Returns:

true if both objects are considered equal; false otherwise.

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compare

public int compare(java.lang.Object o1,
                   java.lang.Object o2)

Description copied from class: FastComparator

Compares the specified objects for order. Returns a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

Specified by:

compare in interface java.util.Comparator

Specified by:

compare in class FastComparator

Parameters:

o1 - the first object.

o2 - the second object.

Returns:

a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

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toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

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