cz.cuni.amis.utils.maps
Class AbstractLazyMap<KEY,VALUE>

java.lang.Object
  cz.cuni.amis.utils.maps.AbstractLazyMap<KEY,VALUE>

Type Parameters:

KEY - KeyType

VALUE - ValueType

All Implemented Interfaces:

java.util.Map<KEY,VALUE>

Direct Known Subclasses:

AbstractLocalWorldView.LazyCompositeObjectMap

public abstract class AbstractLazyMap<KEY,VALUE>
extends java.lang.Object
implements java.util.Map<KEY,VALUE>

Abstract implementation of a lazy map. The values are created on-demand by the create method if they are not cached already. The keySet is kept updated however, only the values are lazy-generated. If you need to iterate over the map, but you don't actually need all the values, iterate over the keySet.

Nested Class Summary

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

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

Constructor Summary

AbstractLazyMap()

AbstractLazyMap(java.util.Map<KEY,VALUE> baseMap)

AbstractLazyMap(java.util.Set<KEY> entryKeySet)

Method Summary

void	addKey(KEY key)
void	clear()
void	clearCache() manually clears the cached objects
boolean	containsKey(java.lang.Object key)
boolean	containsValue(java.lang.Object value)
protected abstract VALUE	create(java.lang.Object key) Creates the Mapped object based on its key.
java.util.Set<java.util.Map.Entry<KEY,VALUE>>	entrySet()
VALUE	get(java.lang.Object key)
boolean	isEmpty()
java.util.Set<KEY>	keySet()
VALUE	put(KEY key, VALUE value)
void	putAll(java.util.Map<? extends KEY,? extends VALUE> m)
VALUE	remove(java.lang.Object key)
void	setKeySet(java.util.Set<KEY> newKeySet)
int	size()
java.util.Collection<VALUE>	values()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

equals, hashCode

Constructor Detail

AbstractLazyMap

public AbstractLazyMap()

AbstractLazyMap

public AbstractLazyMap(java.util.Set<KEY> entryKeySet)

AbstractLazyMap

public AbstractLazyMap(java.util.Map<KEY,VALUE> baseMap)

Method Detail

create

protected abstract VALUE create(java.lang.Object key)

Creates the Mapped object based on its key. Every LazyMap must implement this.

Parameters:

key -

Returns:

addKey

public void addKey(KEY key)

clear

public void clear()

Specified by:

clear in interface java.util.Map<KEY,VALUE>

clearCache

public void clearCache()

manually clears the cached objects

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map<KEY,VALUE>

setKeySet

public void setKeySet(java.util.Set<KEY> newKeySet)

containsValue

public boolean containsValue(java.lang.Object value)

Specified by:

containsValue in interface java.util.Map<KEY,VALUE>

entrySet

public java.util.Set<java.util.Map.Entry<KEY,VALUE>> entrySet()

Specified by:

entrySet in interface java.util.Map<KEY,VALUE>

get

public VALUE get(java.lang.Object key)

Specified by:

get in interface java.util.Map<KEY,VALUE>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map<KEY,VALUE>

keySet

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

Specified by:

keySet in interface java.util.Map<KEY,VALUE>

put

public VALUE put(KEY key,
                 VALUE value)

Specified by:

put in interface java.util.Map<KEY,VALUE>

putAll

public void putAll(java.util.Map<? extends KEY,? extends VALUE> m)

Specified by:

putAll in interface java.util.Map<KEY,VALUE>

remove

public VALUE remove(java.lang.Object key)

Specified by:

remove in interface java.util.Map<KEY,VALUE>

size

public int size()

Specified by:

size in interface java.util.Map<KEY,VALUE>

values

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

Specified by:

values in interface java.util.Map<KEY,VALUE>