er.extensions.foundation

Class ERXMultiKey

java.lang.Object

er.extensions.foundation.ERXMultiKey

public class ERXMultiKey
extends Object

Simple class to use multiple objects as a single key for a dictionary or HashMap. The goal of this class is to be very fast.

Constructor Summary

Constructors

Constructor and Description
ERXMultiKey() Constructs a multi-key.
ERXMultiKey(NSArray<Object> keys) Constructs a multi-key for a given array.
ERXMultiKey(Object[] keys) Constructs a multi-key for a given object array.
ERXMultiKey(Object key, Object... keys) Constructs a multi-key for a given list of keys.
ERXMultiKey(Vector<Object> keys) Constructs a multi-key for a given vector.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o) Method used to compare two ERXMultiKeys.
int	hashCode() Calculates a unique hash code for the given array of keys.
Object[]	keys() Method used to return a copy of the object array of keys for the current multi-key.
Object[]	keysNoCopy() Method used to return the object array of keys for the current multi-key. DO NOT MODIFY!
void	recomputeHashCode() Recomputes the hash code if you ever changes the keys array directly
String	toString() String representation of the multi-key.

Methods inherited from class java.lang.Object

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

Constructor Detail

ERXMultiKey

public ERXMultiKey()

Constructs a multi-key.

ERXMultiKey

public ERXMultiKey(Object[] keys)

Constructs a multi-key for a given object array.

Parameters:

keys - object array

ERXMultiKey

public ERXMultiKey(NSArray<Object> keys)

Constructs a multi-key for a given array.

Parameters:

keys - array of keys

ERXMultiKey

public ERXMultiKey(Vector<Object> keys)

Constructs a multi-key for a given vector.

Parameters:

keys - vector of keys

ERXMultiKey

public ERXMultiKey(Object key,
                   Object... keys)

Constructs a multi-key for a given list of keys.

Parameters:

key - one key

keys - additional keys

Method Detail

keys

public final Object[] keys()

Method used to return a copy of the object array of keys for the current multi-key.

Returns:

object array of keys

keysNoCopy

public final Object[] keysNoCopy()

Method used to return the object array of keys for the current multi-key.
DO NOT MODIFY!

Returns:

object array of keys

hashCode

public final int hashCode()

Calculates a unique hash code for the given array of keys.

Overrides:

hashCode in class Object

Returns:

unique hash code for the array of keys.

recomputeHashCode

public final void recomputeHashCode()

Recomputes the hash code if you ever changes the keys array directly

equals

public final boolean equals(Object o)

Method used to compare two ERXMultiKeys. A multi key is equal to another multi key if the number of keys are equal and all of the keys are either both null or equals.

Overrides:

equals in class Object

Parameters:

o - object to be compared

Returns:

result of comparison

toString

public String toString()

String representation of the multi-key.

Overrides:

toString in class Object

Returns:

string representation of key.