Package com.streambase.liveview.client

Class HashableTuple

java.lang.Object

com.streambase.liveview.client.HashableTuple

All Implemented Interfaces:

KeyValue

public abstract class HashableTuple
extends Object
implements KeyValue

HashableTuple is a wrapper for Tuples from a single Query so they can be stored in a HashSet. If the two wrapped Tuples have the same values for the Query's key fields, then the HashableTuples will have the same hashCode and will return true from .equals()

Field Summary

Fields

Modifier and Type	Field	Description
protected final Tuple	tuple

Constructor Summary

Constructors

Constructor	Description
HashableTuple(Tuple tuple)

Method Summary

Modifier and Type	Method	Description
abstract boolean	equals(Object other)
abstract String	getValueAsUniqueString()	Returns an opaque unique String that can be used to identify this tuple.
abstract int	hashCode()	Returns a int hashcode for this KeyValue. hashcodes may collide for complex keys in large result sets.

Methods inherited from class java.lang.Object

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

Field Details

tuple

protected final Tuple tuple

Constructor Details

HashableTuple

public HashableTuple(Tuple tuple)

Method Details

equals

public abstract boolean equals(Object other)

Specified by:

equals in interface KeyValue

Overrides:

equals in class Object

hashCode

public abstract int hashCode()

Description copied from interface: KeyValue

Returns a int hashcode for this KeyValue. hashcodes may collide for complex keys in large result sets.

Specified by:

hashCode in interface KeyValue

Overrides:

hashCode in class Object

Returns:

32 bit hashcode for this KeyValue

getValueAsUniqueString

public abstract String getValueAsUniqueString()

Description copied from interface: KeyValue

Returns an opaque unique String that can be used to identify this tuple. What this String looks like may change from release to release so should not be persisted.

Specified by:

getValueAsUniqueString in interface KeyValue

Returns:

- Unique String that identifies this KeyValue