com.espertech.esper.collection

Class MultiKeyUntyped

java.lang.Object

com.espertech.esper.collection.MultiKeyUntyped

All Implemented Interfaces:

MetaDefItem, Serializable

public final class MultiKeyUntyped
extends Object
implements MetaDefItem, Serializable

Functions as a key value for Maps where keys need to be composite values. The class allows a Map that uses MultiKeyUntyped entries for key values to use multiple objects as keys. It calculates the hashCode from the key objects on construction and caches the hashCode.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MultiKeyUntyped(Object key) Constructor for a single key object.
MultiKeyUntyped(Object[] keys) Constructor for multiple keys supplied in an object array.
MultiKeyUntyped(Object key1, Object key2) Constructor for a pair of key objects.
MultiKeyUntyped(Object key1, Object key2, Object key3) Constructor for three key objects.
MultiKeyUntyped(Object key1, Object key2, Object key3, Object key4) Constructor for four key objects.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other)
Object	get(int index) Returns the key object at the specified position.
Object[]	getKeys() Returns keys.
int	hashCode()
int	size() Returns the number of key objects.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiKeyUntyped

public MultiKeyUntyped(Object[] keys)

Constructor for multiple keys supplied in an object array.

Parameters:

keys - is an array of key objects

MultiKeyUntyped

public MultiKeyUntyped(Object key)

Constructor for a single key object.

Parameters:

key - is the single key object

MultiKeyUntyped

public MultiKeyUntyped(Object key1,
                       Object key2)

Constructor for a pair of key objects.

Parameters:

key1 - is the first key object

key2 - is the second key object

MultiKeyUntyped

public MultiKeyUntyped(Object key1,
                       Object key2,
                       Object key3)

Constructor for three key objects.

Parameters:

key1 - is the first key object

key2 - is the second key object

key3 - is the third key object

MultiKeyUntyped

public MultiKeyUntyped(Object key1,
                       Object key2,
                       Object key3,
                       Object key4)

Constructor for four key objects.

Parameters:

key1 - is the first key object

key2 - is the second key object

key3 - is the third key object

key4 - is the fourth key object

Method Detail

size

public final int size()

Returns the number of key objects.

Returns:

size of key object array

get

public final Object get(int index)

Returns the key object at the specified position.

Parameters:

index - is the array position

Returns:

key object at position

equals

public final boolean equals(Object other)

Overrides:

equals in class Object

getKeys

public Object[] getKeys()

Returns keys.

Returns:

keys object array

hashCode

public final int hashCode()

Overrides:

hashCode in class Object

toString

public final String toString()

Overrides:

toString in class Object