org.apache.commons.collections.map
Class FixedSizeSortedMap
java.lang.Object
org.apache.commons.collections.map.AbstractMapDecorator
org.apache.commons.collections.map.AbstractSortedMapDecorator
org.apache.commons.collections.map.FixedSizeSortedMap
- All Implemented Interfaces:
- java.io.Serializable, java.util.Map, java.util.SortedMap, BoundedMap
public class FixedSizeSortedMap
- extends AbstractSortedMapDecorator
- implements java.util.SortedMap, BoundedMap, java.io.Serializable
Decorates another SortedMap to fix the size blocking 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 FixedSizeSortedMap 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 Collections.synchronizedSortedMap(java.util.SortedMap). 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: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $
- Author:
- Stephen Colebourne, Paul Jack
- See Also:
- Serialized Form
| Nested classes/interfaces inherited from interface java.util.Map |
java.util.Map.Entry |
| Nested classes/interfaces inherited from interface java.util.Map |
java.util.Map.Entry |
|
Constructor Summary |
protected |
FixedSizeSortedMap(java.util.SortedMap map)
Constructor that wraps (not copies). |
|
Method Summary |
void |
clear()
|
static java.util.SortedMap |
decorate(java.util.SortedMap map)
Factory method to create a fixed size sorted map. |
java.util.Set |
entrySet()
|
protected java.util.SortedMap |
getSortedMap()
Gets the map being decorated. |
java.util.SortedMap |
headMap(java.lang.Object toKey)
|
boolean |
isFull()
Returns true if this map is full and no new elements can be added. |
java.util.Set |
keySet()
|
int |
maxSize()
Gets the maximum size of the map (the bound). |
java.lang.Object |
put(java.lang.Object key,
java.lang.Object value)
|
void |
putAll(java.util.Map mapToCopy)
|
java.lang.Object |
remove(java.lang.Object key)
|
java.util.SortedMap |
subMap(java.lang.Object fromKey,
java.lang.Object toKey)
|
java.util.SortedMap |
tailMap(java.lang.Object fromKey)
|
java.util.Collection |
values()
|
| Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
| Methods inherited from interface java.util.SortedMap |
comparator, firstKey, lastKey |
| Methods inherited from interface java.util.Map |
containsKey, containsValue, equals, get, hashCode, isEmpty, size |
| Methods inherited from interface java.util.Map |
containsKey, containsValue, equals, get, hashCode, isEmpty, size |
FixedSizeSortedMap
protected FixedSizeSortedMap(java.util.SortedMap map)
- Constructor that wraps (not copies).
- Parameters:
map - the map to decorate, must not be null
- Throws:
java.lang.IllegalArgumentException - if map is null
decorate
public static java.util.SortedMap decorate(java.util.SortedMap map)
- Factory method to create a fixed size sorted map.
- Parameters:
map - the map to decorate, must not be null
- Throws:
java.lang.IllegalArgumentException - if map is null
getSortedMap
protected java.util.SortedMap getSortedMap()
- Gets the map being decorated.
- Overrides:
getSortedMap in class AbstractSortedMapDecorator
- Returns:
- the decorated map
put
public java.lang.Object put(java.lang.Object key,
java.lang.Object value)
- Specified by:
put in interface java.util.Map- Overrides:
put in class AbstractMapDecorator
putAll
public void putAll(java.util.Map mapToCopy)
- Specified by:
putAll in interface java.util.Map- Overrides:
putAll in class AbstractMapDecorator
clear
public void clear()
- Specified by:
clear in interface java.util.Map- Overrides:
clear in class AbstractMapDecorator
remove
public java.lang.Object remove(java.lang.Object key)
- Specified by:
remove in interface java.util.Map- Overrides:
remove in class AbstractMapDecorator
entrySet
public java.util.Set entrySet()
- Specified by:
entrySet in interface java.util.Map- Overrides:
entrySet in class AbstractMapDecorator
keySet
public java.util.Set keySet()
- Specified by:
keySet in interface java.util.Map- Overrides:
keySet in class AbstractMapDecorator
values
public java.util.Collection values()
- Specified by:
values in interface java.util.Map- Overrides:
values in class AbstractMapDecorator
subMap
public java.util.SortedMap subMap(java.lang.Object fromKey,
java.lang.Object toKey)
- Specified by:
subMap in interface java.util.SortedMap- Overrides:
subMap in class AbstractSortedMapDecorator
headMap
public java.util.SortedMap headMap(java.lang.Object toKey)
- Specified by:
headMap in interface java.util.SortedMap- Overrides:
headMap in class AbstractSortedMapDecorator
tailMap
public java.util.SortedMap tailMap(java.lang.Object fromKey)
- Specified by:
tailMap in interface java.util.SortedMap- Overrides:
tailMap in class AbstractSortedMapDecorator
isFull
public boolean isFull()
- Description copied from interface:
BoundedMap
- Returns true if this map is full and no new elements can be added.
- Specified by:
isFull in interface BoundedMap
- Returns:
true if the map is full
maxSize
public int maxSize()
- Description copied from interface:
BoundedMap
- Gets the maximum size of the map (the bound).
- Specified by:
maxSize in interface BoundedMap
- Returns:
- the maximum number of elements the map can hold
Copyright © 2001-2008 The Apache Software Foundation. All Rights Reserved.