org.apache.axis.utils
Class LockableHashtable

java.lang.Object
  |
  +--java.util.Dictionary
        |
        +--java.util.Hashtable
              |
              +--org.apache.axis.utils.LockableHashtable

All Implemented Interfaces:

java.lang.Cloneable, java.util.Map, java.io.Serializable

public class LockableHashtable

extends java.util.Hashtable

This subclass of the java Hashtable allows individual entries to be "locked" so that their values cannot be overwritten or removed. Note, only the put() and remove() methods have been overridden. The clear() method still removes all entries whether they've been locked or not.

Author:

James Snell (jasnell@us.ibm.com)

See Also:

Serialized Form

Constructor Summary

LockableHashtable()

LockableHashtable(int p1)

LockableHashtable(int p1, float p2)

LockableHashtable(java.util.Map p1)

Method Summary

java.lang.Object	get(java.lang.Object key) Get an entry from this hashtable, and if we don't find anything, defer to our parent, if any.
boolean	isKeyLocked(java.lang.Object key) Returns true if a given key is in our locked list
java.lang.Object	put(java.lang.Object p1, java.lang.Object p2) Overrides the Hashtable.put() method to mark items as not being locked.
java.lang.Object	put(java.lang.Object p1, java.lang.Object p2, boolean locked) New version of the put() method that allows for explicitly marking items added to the hashtable as locked.
java.lang.Object	remove(java.lang.Object p1) Checks to see if an item is locked before it is removed.
void	setParent(java.util.Hashtable parent) Set the parent Hashtable for this object

Methods inherited from class java.util.Hashtable

clear, clone, contains, containsKey, containsValue, elements, entrySet, equals, hashCode, isEmpty, keys, keySet, putAll, rehash, size, toString, values

Methods inherited from class java.lang.Object

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

Constructor Detail

LockableHashtable

public LockableHashtable()

LockableHashtable

public LockableHashtable(int p1,
                         float p2)

LockableHashtable

public LockableHashtable(java.util.Map p1)

LockableHashtable

public LockableHashtable(int p1)

Method Detail

setParent

public void setParent(java.util.Hashtable parent)

Set the parent Hashtable for this object

get

public java.lang.Object get(java.lang.Object key)

Get an entry from this hashtable, and if we don't find anything, defer to our parent, if any.

Specified by:

get in interface java.util.Map

Overrides:

get in class java.util.Hashtable

put

public java.lang.Object put(java.lang.Object p1,
                            java.lang.Object p2,
                            boolean locked)

New version of the put() method that allows for explicitly marking items added to the hashtable as locked.

put

public java.lang.Object put(java.lang.Object p1,
                            java.lang.Object p2)

Overrides the Hashtable.put() method to mark items as not being locked.

Specified by:

put in interface java.util.Map

Overrides:

put in class java.util.Hashtable

remove

public java.lang.Object remove(java.lang.Object p1)

Checks to see if an item is locked before it is removed.

Specified by:

remove in interface java.util.Map

Overrides:

remove in class java.util.Hashtable

isKeyLocked

public boolean isKeyLocked(java.lang.Object key)

Returns true if a given key is in our locked list