Package org.mozilla.javascript
Class HashSlotMap
java.lang.Object
org.mozilla.javascript.HashSlotMap
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.
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Field Summary
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
Insert a new slot to the map.private Slot
createSlot
(Object key, int index, int attributes) boolean
isEmpty()
Return whether the map is empty.iterator()
private Object
private Object
Return the Slot that matches EITHER "key" or "index".Retrieve the slot at EITHER key or index, or return null if the slot cannot be found.void
Remove the slot at either "key" or "index".void
Replace "slot" with a new slot.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
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Field Details
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map
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Constructor Details
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HashSlotMap
public HashSlotMap()
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Method Details
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size
public int size()Description copied from interface:SlotMap
Return the size of the map. -
isEmpty
public boolean isEmpty()Description copied from interface:SlotMap
Return whether the map is empty. -
query
Description copied from interface:SlotMap
Retrieve the slot at EITHER key or index, or return null if the slot cannot be found. -
modify
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".) If no slot exists, then create a default slot class.- Specified by:
modify
in interfaceSlotMap
- Parameters:
key
- The key for the slot, which should be a String or a Symbol.index
- if key is zero, then this will be used as the key instead.attributes
- the attributes to be set on the slot if a new slot is created. Existing slots will not be modified.- Returns:
- a Slot, which will be created anew if no such slot exists.
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replace
Description copied from interface:SlotMap
Replace "slot" with a new slot. This is used to change slot types. -
createSlot
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add
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 "modify" method. -
remove
Description copied from interface:SlotMap
Remove the slot at either "key" or "index". -
iterator
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makeKey
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makeKey
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