nl.knowledgeplaza.util
Class LinearMap<K,V>

java.lang.Object
  nl.knowledgeplaza.util.LinearMap<K,V>

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.Map<K,V>

Direct Known Subclasses:

JdbcUtil.JdbcMap, ParameterSet

public class LinearMap<K,V>
extends java.lang.Object
implements java.util.Map<K,V>, java.lang.Cloneable, java.io.Serializable

LinearMap is a simplistic light-weight Map designed for use when the number of entries is small. It is backed by a ArrayList. TreeMap is not a 100% replacement, since TreeMap does not allow for NULL as a key.

Version:

$Revision: 1.4 $

Author:

$Author: toeukpap $

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

java.util.Map.Entry<K,V>

Constructor Summary

LinearMap()
Creates a LinearMap.

LinearMap(int capacity)
Creates a LinearMap with specified capacity.

LinearMap(java.util.Map map)

Method Summary

void	clear()
boolean	containsKey(java.lang.Object key)
boolean	containsValue(java.lang.Object value)
java.util.Set	entrySet() must return the same collection everytime as defined in the Map interface
int	find(java.lang.Object key) find the index of a key
int	findValue(V value) find the index of a key
V	get(java.lang.Object key)
K	getKeyAt(int idx)
V	getValueAt(int idx)
boolean	isEmpty()
java.util.Set<K>	keySet() Return a set with all keys must return the same collection everytime as defined in the Map interface
V	put(K key, V value)
void	putAll(java.util.Map<? extends K,? extends V> t)
V	putAt(int idx, K key, V value) Put key in certain place in index
V	putBefore(K refKey, K key, V value) Append to end
V	remove(java.lang.Object key)
V	removeAt(int lIdx)
int	size()
java.lang.String	toString()
java.util.Collection<V>	values() must return the same collection everytime as defined in the Map interface

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Constructor Detail

LinearMap

public LinearMap()

Creates a LinearMap.

LinearMap

public LinearMap(int capacity)

Creates a LinearMap with specified capacity.

LinearMap

public LinearMap(java.util.Map map)

Method Detail

entrySet

public java.util.Set entrySet()

must return the same collection everytime as defined in the Map interface

Specified by:

entrySet in interface java.util.Map<K,V>

put

public V put(K key,
             V value)

Specified by:

put in interface java.util.Map<K,V>

putBefore

public V putBefore(K refKey,
                   K key,
                   V value)

Append to end

Parameters:

refKey -

key -

value - Throws IllegalArgumentException when the refKey does not exist

Returns:

old value

putAt

public V putAt(int idx,
               K key,
               V value)

Put key in certain place in index

Parameters:

idx -

key -

value -

Returns:

removeAt

public V removeAt(int lIdx)

remove

public V remove(java.lang.Object key)

Specified by:

remove in interface java.util.Map<K,V>

keySet

public java.util.Set<K> keySet()

Return a set with all keys must return the same collection everytime as defined in the Map interface

Specified by:

keySet in interface java.util.Map<K,V>

find

public int find(java.lang.Object key)

find the index of a key

Returns:

idx (> 0) or -1 when not found

findValue

public int findValue(V value)

find the index of a key

Returns:

idx (> 0) or -1 when not found

clear

public void clear()

Specified by:

clear in interface java.util.Map<K,V>

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map<K,V>

containsValue

public boolean containsValue(java.lang.Object value)

Specified by:

containsValue in interface java.util.Map<K,V>

getKeyAt

public K getKeyAt(int idx)

Parameters:

idx -

Returns:

getValueAt

public V getValueAt(int idx)

Parameters:

idx -

Returns:

get

public V get(java.lang.Object key)

Specified by:

get in interface java.util.Map<K,V>

Parameters:

key -

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map<K,V>

putAll

public void putAll(java.util.Map<? extends K,? extends V> t)

Specified by:

putAll in interface java.util.Map<K,V>

size

public int size()

Specified by:

size in interface java.util.Map<K,V>

values

public java.util.Collection<V> values()

must return the same collection everytime as defined in the Map interface

Specified by:

values in interface java.util.Map<K,V>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object