Skip navigation links

com.tangosol.util
Class ImmutableArrayList.SetView

java.lang.Object
com.tangosol.util.WrapperCollections.AbstractWrapperCollection
com.tangosol.util.WrapperCollections.AbstractWrapperSet
com.tangosol.util.ImmutableArrayList.SetView

All Implemented Interfaces:

Iterable, Collection, Set

Enclosing class:

ImmutableArrayList

protected class ImmutableArrayList.SetView

extends WrapperCollections.AbstractWrapperSet

SetView exposes the underlying ImmutableArrayList through the Set interface, maintaining correct equals() and hashCode() semantics

Field Summary

Fields inherited from class com.tangosol.util.WrapperCollections.AbstractWrapperCollection

m_colDelegate

Constructor Summary

protected

ImmutableArrayList.SetView() Create a SetView over this ImmutableArrayList.

Method Summary

boolean	equals(Object o) Compares the specified object with this collection for equality. While the Collection interface adds no stipulations to the general contract for the Object.equals, programmers who implement the Collection interface "directly" (in other words, create a class that is a Collection but is not a Set or a List) must exercise care if they choose to override the Object.equals. It is not necessary to do so, and the simplest course of action is to rely on Object's implementation, but the implementer may wish to implement a "value comparison" in place of the default "reference comparison." (The List and Set interfaces mandate such value comparisons.) The general contract for the Object.equals method states that equals must be symmetric (in other words, a.equals(b) if and only if b.equals(a)). The contracts for List.equals and Set.equals state that lists are only equal to other lists, and sets to other sets. Thus, a custom equals method for a collection class that implements neither the List nor Set interface must return false when this collection is compared to any list or set. (By the same logic, it is not possible to write a class that correctly implements both the Set and List interfaces.)
int	hashCode() Returns the hash code value for this collection. While the Collection interface adds no stipulations to the general contract for the Object.hashCode method, programmers should take note that any class that overrides the Object.equals method must also override the Object.hashCode method in order to satisfy the general contract for the Object.hashCodemethod. In particular, c1.equals(c2) implies that c1.hashCode()==c2.hashCode().
String	toString()

Methods inherited from class com.tangosol.util.WrapperCollections.AbstractWrapperSet

getDelegate

Methods inherited from class com.tangosol.util.WrapperCollections.AbstractWrapperCollection

add, addAll, clear, contains, containsAll, isEmpty, iterator, remove, removeAll, retainAll, size, toArray, toArray

Methods inherited from interface java.util.Set

add, addAll, clear, contains, containsAll, isEmpty, iterator, remove, removeAll, retainAll, size, toArray, toArray

Constructor Detail

ImmutableArrayList.SetView

protected ImmutableArrayList.SetView()

Create a SetView over this ImmutableArrayList.

Method Detail

equals

public boolean equals(Object o)

Compares the specified object with this collection for equality.

While the Collection interface adds no stipulations to the general contract for the Object.equals, programmers who implement the Collection interface "directly" (in other words, create a class that is a Collection but is not a Set or a List) must exercise care if they choose to override the Object.equals. It is not necessary to do so, and the simplest course of action is to rely on Object's implementation, but the implementer may wish to implement a "value comparison" in place of the default "reference comparison." (The List and Set interfaces mandate such value comparisons.)

The general contract for the Object.equals method states that equals must be symmetric (in other words, a.equals(b) if and only if b.equals(a)). The contracts for List.equals and Set.equals state that lists are only equal to other lists, and sets to other sets. Thus, a custom equals method for a collection class that implements neither the List nor Set interface must return false when this collection is compared to any list or set. (By the same logic, it is not possible to write a class that correctly implements both the Set and List interfaces.)

Specified by:

equals in interface Collection

Specified by:

equals in interface Set

Overrides:

equals in class WrapperCollections.AbstractWrapperCollection

Parameters:

o - Object to be compared for equality with this collection.

Returns:

true if the specified object is equal to this collection

See Also:

Object.equals(Object), Set.equals(Object), List.equals(Object)

hashCode

public int hashCode()

Returns the hash code value for this collection. While the Collection interface adds no stipulations to the general contract for the Object.hashCode method, programmers should take note that any class that overrides the Object.equals method must also override the Object.hashCode method in order to satisfy the general contract for the Object.hashCodemethod. In particular, c1.equals(c2) implies that c1.hashCode()==c2.hashCode().

Specified by:

hashCode in interface Collection

Specified by:

hashCode in interface Set

Overrides:

hashCode in class WrapperCollections.AbstractWrapperCollection

Returns:

the hash code value for this collection

See Also:

Object.hashCode(), Object.equals(Object)

toString

public String toString()

Skip navigation links