org.antlr.misc

Class OrderedHashSet<T>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<E>

java.util.HashSet

org.antlr.misc.OrderedHashSet<T>

All Implemented Interfaces:

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

public class OrderedHashSet<T>
extends java.util.HashSet

A HashMap that remembers the order that the elements were added. You can alter the ith element with set(i,value) too :) Unique list. I need the replace/set-element-i functionality so I'm subclassing OrderedHashSet.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.List<T>	elements Track the elements as they are added to the set

Constructor Summary

Constructors

Constructor and Description
OrderedHashSet()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	add(java.lang.Object value) Add a value to list; keep in hashtable for consistency also; Key is object itself.
void	clear()
java.util.List<T>	elements() Return the List holding list of table elements.
T	get(int i)
boolean	remove(java.lang.Object o)
T	set(int i, T value) Replace an existing value with a new value; updates the element list and the hash table, but not the key as that has not changed.
int	size()
java.lang.String	toString()

Methods inherited from class java.util.HashSet

clone, contains, isEmpty, iterator

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, retainAll, toArray, toArray

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

addAll, containsAll, equals, hashCode, removeAll, retainAll, toArray, toArray

Field Detail

elements

protected java.util.List<T> elements

Track the elements as they are added to the set

Constructor Detail

OrderedHashSet

public OrderedHashSet()

Method Detail

get

public T get(int i)

set

public T set(int i,
    T value)

Replace an existing value with a new value; updates the element list and the hash table, but not the key as that has not changed.

add

public boolean add(java.lang.Object value)

Add a value to list; keep in hashtable for consistency also; Key is object itself. Good for say asking if a certain string is in a list of strings.

Specified by:

add in interface java.util.Collection

Specified by:

add in interface java.util.Set

Overrides:

add in class java.util.HashSet

remove

public boolean remove(java.lang.Object o)

Specified by:

remove in interface java.util.Collection

Specified by:

remove in interface java.util.Set

Overrides:

remove in class java.util.HashSet

clear

public void clear()

Specified by:

clear in interface java.util.Collection

Specified by:

clear in interface java.util.Set

Overrides:

clear in class java.util.HashSet

elements

public java.util.List<T> elements()

Return the List holding list of table elements. Note that you are NOT getting a copy so don't write to the list.

size

public int size()

Specified by:

size in interface java.util.Collection

Specified by:

size in interface java.util.Set

Overrides:

size in class java.util.HashSet

toString

public java.lang.String toString()

Overrides:

toString in class java.util.AbstractCollection