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Java Source Code / Java Documentation » Library » Apache common Collections » org.apache.commons.collections.map 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.apache.commons.collections.map.AbstractMapDecorator
      org.apache.commons.collections.map.FixedSizeMap

FixedSizeMap
public class FixedSizeMap extends AbstractMapDecorator implements Map,BoundedMap,Serializable(Code)
Decorates another Map to fix the size, preventing add/remove.

Any action that would change the size of the map is disallowed. The put method is allowed to change the value associated with an existing key however.

If trying to remove or clear the map, an UnsupportedOperationException is thrown. If trying to put a new mapping into the map, an IllegalArgumentException is thrown. This is because the put method can succeed if the mapping's key already exists in the map, so the put method is not always unsupported.

Note that FixedSizeMap is not synchronized and is not thread-safe. If you wish to use this map from multiple threads concurrently, you must use appropriate synchronization. The simplest approach is to wrap this map using java.util.Collections.synchronizedMap(Map) . This class may throw exceptions when accessed by concurrent threads without synchronization.

This class is Serializable from Commons Collections 3.1.
since:
   Commons Collections 3.0
version:
   $Revision: 348007 $ $Date: 2005-11-21 22:52:57 +0000 (Mon, 21 Nov 2005) $
author:
   Stephen Colebourne
author:
   Paul Jack




Constructor Summary
protected  FixedSizeMap(Map map)
     Constructor that wraps (not copies).

Method Summary
public  voidclear()
    
public static  Mapdecorate(Map map)
     Factory method to create a fixed size map.
public  SetentrySet()
    
public  booleanisFull()
    
public  SetkeySet()
    
public  intmaxSize()
    
public  Objectput(Object key, Object value)
    
public  voidputAll(Map mapToCopy)
    
public  Objectremove(Object key)
    
public  Collectionvalues()
    


Constructor Detail
FixedSizeMap
protected FixedSizeMap(Map map)(Code)
Constructor that wraps (not copies).
Parameters:
  map - the map to decorate, must not be null
throws:
  IllegalArgumentException - if map is null




Method Detail
clear
public void clear()(Code)



decorate
public static Map decorate(Map map)(Code)
Factory method to create a fixed size map.
Parameters:
  map - the map to decorate, must not be null
throws:
  IllegalArgumentException - if map is null



entrySet
public Set entrySet()(Code)



isFull
public boolean isFull()(Code)



keySet
public Set keySet()(Code)



maxSize
public int maxSize()(Code)



put
public Object put(Object key, Object value)(Code)



putAll
public void putAll(Map mapToCopy)(Code)



remove
public Object remove(Object key)(Code)



values
public Collection values()(Code)



Fields inherited from org.apache.commons.collections.map.AbstractMapDecorator
protected transient Map map(Code)(Java Doc)

Methods inherited from org.apache.commons.collections.map.AbstractMapDecorator
public void clear()(Code)(Java Doc)
public boolean containsKey(Object key)(Code)(Java Doc)
public boolean containsValue(Object value)(Code)(Java Doc)
public Set entrySet()(Code)(Java Doc)
public boolean equals(Object object)(Code)(Java Doc)
public Object get(Object key)(Code)(Java Doc)
protected Map getMap()(Code)(Java Doc)
public int hashCode()(Code)(Java Doc)
public boolean isEmpty()(Code)(Java Doc)
public Set keySet()(Code)(Java Doc)
public Object put(Object key, Object value)(Code)(Java Doc)
public void putAll(Map mapToCopy)(Code)(Java Doc)
public Object remove(Object key)(Code)(Java Doc)
public int size()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
public Collection values()(Code)(Java Doc)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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