Package org.htmlunit.corejs.javascript
Class ThreadSafeSlotMapContainer
- java.lang.Object
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- org.htmlunit.corejs.javascript.SlotMapContainer
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- org.htmlunit.corejs.javascript.ThreadSafeSlotMapContainer
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class ThreadSafeSlotMapContainer extends SlotMapContainer
This class extends the SlotMapContainer so that we have thread-safe access to all the properties of an object.
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Field Summary
Fields Modifier and Type Field Description private java.util.concurrent.locks.StampedLock
lock
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Fields inherited from class org.htmlunit.corejs.javascript.SlotMapContainer
map
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Constructor Summary
Constructors Constructor Description ThreadSafeSlotMapContainer()
ThreadSafeSlotMapContainer(int initialSize)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
add(Slot newSlot)
Insert a new slot to the map.protected void
checkMapSize()
Before inserting a new item in the map, check and see if we need to expand from the embedded map to a HashMap that is more robust against large numbers of hash collisions.int
dirtySize()
boolean
isEmpty()
Return whether the map is empty.java.util.Iterator<Slot>
iterator()
Slot
modify(java.lang.Object key, int index, int attributes)
Return the Slot that matches EITHER "key" or "index".Slot
query(java.lang.Object key, int index)
Retrieve the slot at EITHER key or index, or return null if the slot cannot be found.long
readLock()
Take out a read lock on the slot map, if locking is implemented.void
remove(java.lang.Object key, int index)
Remove the slot at either "key" or "index".void
replace(Slot oldSlot, Slot newSlot)
Replace "slot" with a new slot.int
size()
Return the size of the map.void
unlockRead(long stamp)
Unlock the lock taken out by readLock.
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Method Detail
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size
public int size()
Description copied from interface:SlotMap
Return the size of the map.- Specified by:
size
in interfaceSlotMap
- Overrides:
size
in classSlotMapContainer
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dirtySize
public int dirtySize()
- Overrides:
dirtySize
in classSlotMapContainer
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isEmpty
public boolean isEmpty()
Description copied from interface:SlotMap
Return whether the map is empty.- Specified by:
isEmpty
in interfaceSlotMap
- Overrides:
isEmpty
in classSlotMapContainer
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modify
public Slot modify(java.lang.Object key, int index, int attributes)
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
- Overrides:
modify
in classSlotMapContainer
- 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
public void replace(Slot oldSlot, Slot newSlot)
Description copied from interface:SlotMap
Replace "slot" with a new slot. This is used to change slot types.- Specified by:
replace
in interfaceSlotMap
- Overrides:
replace
in classSlotMapContainer
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query
public Slot query(java.lang.Object key, int index)
Description copied from interface:SlotMap
Retrieve the slot at EITHER key or index, or return null if the slot cannot be found.- Specified by:
query
in interfaceSlotMap
- Overrides:
query
in classSlotMapContainer
- 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.- Returns:
- either the Slot that matched the key and index, or null
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add
public void add(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 "modify" method.- Specified by:
add
in interfaceSlotMap
- Overrides:
add
in classSlotMapContainer
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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 interfaceSlotMap
- Overrides:
remove
in classSlotMapContainer
- 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.
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readLock
public long readLock()
Take out a read lock on the slot map, if locking is implemented. The caller MUST call this method before using the iterator, and MUST NOT call this method otherwise.- Overrides:
readLock
in classSlotMapContainer
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unlockRead
public void unlockRead(long stamp)
Unlock the lock taken out by readLock.- Overrides:
unlockRead
in classSlotMapContainer
- Parameters:
stamp
- the value returned by readLock.
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iterator
public java.util.Iterator<Slot> iterator()
- Specified by:
iterator
in interfacejava.lang.Iterable<Slot>
- Overrides:
iterator
in classSlotMapContainer
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checkMapSize
protected void checkMapSize()
Before inserting a new item in the map, check and see if we need to expand from the embedded map to a HashMap that is more robust against large numbers of hash collisions.- Overrides:
checkMapSize
in classSlotMapContainer
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