com.opensymphony.util
Class OrderedMap

java.lang.Object
  |
  +--java.util.AbstractMap
        |
        +--java.util.HashMap
              |
              +--com.opensymphony.util.OrderedMap
All Implemented Interfaces:
java.lang.Cloneable, java.util.Map, java.io.Serializable

public class OrderedMap
extends java.util.HashMap

Extention of java.util.HashMap that can retain original order elements were add in.

Uses an internal java.util.LinkedList which can be iterated through by accessing iterator().

Version:
$Revision: 1.7 $
Author:
Joe Walnes
See Also:
HashMap, Serialized Form

Inner classes inherited from class java.util.Map
java.util.Map.Entry
 
Constructor Summary
OrderedMap()
           
 
Method Summary
 void clear()
          Overrides superclass.
 java.util.Iterator iterator()
          Return keys in original order.
 java.lang.Object put(java.lang.Object key, java.lang.Object value)
          Overrides superclass.
 java.lang.Object remove(java.lang.Object key)
          Overrides superclass.
 
Methods inherited from class java.util.HashMap
clone, containsKey, containsValue, entrySet, get, isEmpty, keySet, putAll, size, values
 
Methods inherited from class java.util.AbstractMap
equals, hashCode, toString
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface java.util.Map
equals, hashCode
 

Constructor Detail

OrderedMap

public OrderedMap()
Method Detail

iterator

public java.util.Iterator iterator()
Return keys in original order.
Returns:
Iteration of keys.

clear

public void clear()
Overrides superclass.
Overrides:
clear in class java.util.HashMap

put

public java.lang.Object put(java.lang.Object key,
                            java.lang.Object value)
Overrides superclass.
Overrides:
put in class java.util.HashMap

remove

public java.lang.Object remove(java.lang.Object key)
Overrides superclass.
Overrides:
remove in class java.util.HashMap

See www.opensymphony.com for more information.