org.mozilla.javascript

Class HashSlotMap

java.lang.Object

org.mozilla.javascript.HashSlotMap

All Implemented Interfaces:

java.lang.Iterable<org.mozilla.javascript.ScriptableObject.Slot>, SlotMap

public class HashSlotMap
extends java.lang.Object
implements SlotMap

This class implements the SlotMap interface using a java.util.HashMap. This class has more overhead than EmbeddedSlotMap, especially because it puts each "Slot" inside an intermediate object. However it is much more resistant to large number of hash collisions than EmbeddedSlotMap and therefore we use this implementation when an object gains a large number of properties.

Constructor Summary

Constructors

Constructor and Description
HashSlotMap()

Method Summary

Modifier and Type	Method and Description
void	addSlot(org.mozilla.javascript.ScriptableObject.Slot newSlot) Insert a new slot to the map.
org.mozilla.javascript.ScriptableObject.Slot	get(java.lang.Object key, int index, org.mozilla.javascript.ScriptableObject.SlotAccess accessType) Return the Slot that matches EITHER "key" or "index".
boolean	isEmpty() Return whether the map is empty.
java.util.Iterator<org.mozilla.javascript.ScriptableObject.Slot>	iterator()
org.mozilla.javascript.ScriptableObject.Slot	query(java.lang.Object key, int index) This is an optimization that is the same as get with an accessType of SLOT_QUERY.
void	remove(java.lang.Object key, int index) Remove the slot at either "key" or "index".
int	size() Return the size of the map.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

HashSlotMap

public HashSlotMap()

Method Detail

size

public int size()

Description copied from interface: SlotMap

Return the size of the map.

Specified by:

size in interface SlotMap

isEmpty

public boolean isEmpty()

Description copied from interface: SlotMap

Return whether the map is empty.

Specified by:

isEmpty in interface SlotMap

query

public org.mozilla.javascript.ScriptableObject.Slot query(java.lang.Object key,
                                                          int index)

Description copied from interface: SlotMap

This is an optimization that is the same as get with an accessType of SLOT_QUERY. It should be used instead of SLOT_QUERY because it is more efficient.

Specified by:

query in interface SlotMap

get

public org.mozilla.javascript.ScriptableObject.Slot get(java.lang.Object key,
                                                        int index,
                                                        org.mozilla.javascript.ScriptableObject.SlotAccess accessType)

Description copied from interface: SlotMap

Return the Slot that matches EITHER "key" or "index". (It will use "key" if it is not null, and otherwise "index". "accessType" is one of the constants defined in ScriptableObject.

Specified by:

get in interface SlotMap

addSlot

public void addSlot(org.mozilla.javascript.ScriptableObject.Slot newSlot)

Description copied from interface: SlotMap

Insert a new slot to the map. Both "name" and "indexOrHash" must be populated. Note that ScriptableObject generally adds slots via the "get" method.

Specified by:

addSlot in interface SlotMap

remove

public void remove(java.lang.Object key,
                   int index)

Description copied from interface: SlotMap

Remove the slot at either "key" or "index".

Specified by:

remove in interface SlotMap

iterator

public java.util.Iterator<org.mozilla.javascript.ScriptableObject.Slot> iterator()

Specified by:

iterator in interface java.lang.Iterable<org.mozilla.javascript.ScriptableObject.Slot>