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com.tangosol.util
Class UnsafeSubSet

java.lang.Object
java.util.AbstractCollection
java.util.AbstractSet
com.tangosol.util.SubSet
com.tangosol.util.UnsafeSubSet

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.lang.Iterable, java.util.Collection, java.util.Set

public class UnsafeSubSet

extends SubSet

The UnsafeSubSet is a SubSet which assumes that the backing set already contains all of the keys that would be retained or removed.

This could be used for indexes (as an example), since all indexed keys also must be contained in the backing map.

Since:

Coherence 3.7.2

Author:

coh 2011.06.02

Nested Class Summary

protected static class

UnsafeSubSet.WrapperSet The WrapperSet wraps a Set to provide a hook for initialization.

Nested classes/interfaces inherited from class com.tangosol.util.SubSet

SubSet.SubSetIterator

Constructor Summary

UnsafeSubSet(java.util.Set set)
Construct this set based on the assigned set.

Method Summary

UnsafeSubSet.WrapperSet	getOriginal() Determine what items were in the original set.
boolean	isModified() Determine if the set has been modified.
boolean	removeAll(java.util.Collection col) Removes all this collection's elements that are also contained in the specified collection (optional operation).
void	reset() Discard the changes to the set ("rollback").
void	resolve() Apply the changes to the underlying set ("commit").
boolean	retainAll(java.util.Collection col) Retains only the elements in this collection that are contained in the specified collection (optional operation).

Methods inherited from class com.tangosol.util.SubSet

add, addAll, clear, clone, contains, containsAll, ensureRemoved, ensureRetained, getRemoved, getRetained, isEmpty, isTrackingRemoved, isTrackingRetained, iterator, remove, resetState, size, toArray, toArray

Methods inherited from class java.util.AbstractSet

equals, hashCode

Methods inherited from class java.util.AbstractCollection

toString

Constructor Detail

UnsafeSubSet

public UnsafeSubSet(java.util.Set set)

Construct this set based on the assigned set.

Parameters:

set - the WrapperSet to base this StableSubSet on

Method Detail

getOriginal

public UnsafeSubSet.WrapperSet getOriginal()

Determine what items were in the original set.

Overrides:

getOriginal in class SubSet

Returns:

the set used to construct this SubSet

resolve

public void resolve()

Apply the changes to the underlying set ("commit").

Overrides:

resolve in class SubSet

isModified

public boolean isModified()

Determine if the set has been modified.

Overrides:

isModified in class SubSet

Returns:

true if any items have been removed

reset

public void reset()

Discard the changes to the set ("rollback").

Overrides:

reset in class SubSet

removeAll

public boolean removeAll(java.util.Collection col)

Removes all this collection's elements that are also contained in the specified collection (optional operation). After this call returns, this collection will contain no elements in common with the specified collection.

Specified by:

removeAll in interface java.util.Collection

Specified by:

removeAll in interface java.util.Set

Overrides:

removeAll in class SubSet

Parameters:

col - elements to be removed from this collection

Returns:

true if this collection changed as a result of the call

See Also:

AbstractCollection.remove(Object), AbstractCollection.contains(Object)

retainAll

public boolean retainAll(java.util.Collection col)

Retains only the elements in this collection that are contained in the specified collection (optional operation). In other words, removes from this collection all of its elements that are not contained in the specified collection.

Specified by:

retainAll in interface java.util.Collection

Specified by:

retainAll in interface java.util.Set

Overrides:

retainAll in class SubSet

Parameters:

col - elements to be retained in this collection.

Returns:

true if this collection changed as a result of the call

See Also:

AbstractCollection.remove(Object), AbstractCollection.contains(Object)

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