jodd.util.collection

Class SetMapAdapter<E>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<E>

jodd.util.collection.SetMapAdapter<E>

All Implemented Interfaces:

java.lang.Iterable<E>, java.util.Collection<E>, java.util.Set<E>

public abstract class SetMapAdapter<E>
extends java.util.AbstractSet<E>

Map adapter for a set provides an easy way to have a Set from various map implementations.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Map<E,java.lang.Object>	map

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SetMapAdapter(java.util.Map<E,java.lang.Object> mapImplementation) Constructs a new, empty set; the backing HashMap instance has default initial capacity (16) and load factor (0.75).

Method Summary

Methods

Modifier and Type	Method and Description
boolean	add(E o) Adds the specified element to this set if it is not already present.
void	clear() Removes all of the elements from this set.
boolean	contains(java.lang.Object o) Returns true if this set contains the specified element.
boolean	isEmpty() Returns true if this set contains no elements.
java.util.Iterator<E>	iterator() Returns an iterator over the elements in this set.
boolean	remove(java.lang.Object o) Removes the specified element from this set if it is present.
int	size() Returns the number of elements in this set (its cardinality).

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Set

addAll, containsAll, retainAll, toArray, toArray

Field Detail

map

protected java.util.Map<E,java.lang.Object> map

Constructor Detail

SetMapAdapter

protected SetMapAdapter(java.util.Map<E,java.lang.Object> mapImplementation)

Constructs a new, empty set; the backing HashMap instance has default initial capacity (16) and load factor (0.75).

Method Detail

iterator

public java.util.Iterator<E> iterator()

Returns an iterator over the elements in this set. The elements are returned in no particular order.

Specified by:

iterator in interface java.lang.Iterable<E>

Specified by:

iterator in interface java.util.Collection<E>

Specified by:

iterator in interface java.util.Set<E>

Specified by:

iterator in class java.util.AbstractCollection<E>

Returns:

an Iterator over the elements in this set.

size

public int size()

Returns the number of elements in this set (its cardinality).

Specified by:

size in interface java.util.Collection<E>

Specified by:

size in interface java.util.Set<E>

Specified by:

size in class java.util.AbstractCollection<E>

isEmpty

public boolean isEmpty()

Returns true if this set contains no elements.

Specified by:

isEmpty in interface java.util.Collection<E>

Specified by:

isEmpty in interface java.util.Set<E>

Overrides:

isEmpty in class java.util.AbstractCollection<E>

contains

public boolean contains(java.lang.Object o)

Returns true if this set contains the specified element.

Specified by:

contains in interface java.util.Collection<E>

Specified by:

contains in interface java.util.Set<E>

Overrides:

contains in class java.util.AbstractCollection<E>

Parameters:

o - element whose presence in this set is to be tested.

Returns:

true if this set contains the specified element.

add

public boolean add(E o)

Adds the specified element to this set if it is not already present.

Specified by:

add in interface java.util.Collection<E>

Specified by:

add in interface java.util.Set<E>

Overrides:

add in class java.util.AbstractCollection<E>

Parameters:

o - element to be added to this set.

Returns:

true if the set did not already contain the specified element.

remove

public boolean remove(java.lang.Object o)

Removes the specified element from this set if it is present.

Specified by:

remove in interface java.util.Collection<E>

Specified by:

remove in interface java.util.Set<E>

Overrides:

remove in class java.util.AbstractCollection<E>

Parameters:

o - object to be removed from this set, if present.

Returns:

true if the set contained the specified element.

clear

public void clear()

Removes all of the elements from this set.

Specified by:

clear in interface java.util.Collection<E>

Specified by:

clear in interface java.util.Set<E>

Overrides:

clear in class java.util.AbstractCollection<E>