org.apache.commons.collections.map
Class TransformedSortedMap
- Map, Serializable, SortedMap
public class TransformedSortedMap
implements SortedMap
Decorates another
SortedMap
to transform objects that are added.
The Map put methods and Map.Entry setValue method are affected by this class.
Thus objects must be removed or searched for using their transformed form.
For example, if the transformation converts Strings to Integers, you must
use the Integer form to remove objects.
Note that TransformedSortedMap 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.synchronizedSortedMap
. This class may throw
exceptions when accessed by concurrent threads without synchronization.
This class is Serializable from Commons Collections 3.1.
$Revision: 348013 $ $Date: 2005-11-21 23:24:45 +0000 (Mon, 21 Nov 2005) $
clear , containsKey , containsValue , entrySet , equals , get , getMap , hashCode , isEmpty , keySet , put , putAll , remove , size , toString , values |
TransformedSortedMap
protected TransformedSortedMap(SortedMap map,
Transformer keyTransformer,
Transformer valueTransformer)
Constructor that wraps (not copies).
If there are any elements already in the collection being decorated, they
are NOT transformed.
map
- the map to decorate, must not be nullkeyTransformer
- the predicate to validate the keys, null means no transformationvalueTransformer
- the predicate to validate to values, null means no transformation
comparator
public Comparator comparator()
decorate
public static SortedMap decorate(SortedMap map,
Transformer keyTransformer,
Transformer valueTransformer)
map
- the map to decorate, must not be nullkeyTransformer
- the predicate to validate the keys, null means no transformationvalueTransformer
- the predicate to validate to values, null means no transformation
decorateTransform
public static SortedMap decorateTransform(SortedMap map,
Transformer keyTransformer,
Transformer valueTransformer)
Factory method to create a transforming sorted map that will transform
existing contents of the specified map.
If there are any elements already in the map being decorated, they
will be transformed by this method.
Constrast this with
decorate(SortedMap,Transformer,Transformer)
.
map
- the map to decorate, must not be nullkeyTransformer
- the transformer to use for key conversion, null means no transformationvalueTransformer
- the transformer to use for value conversion, null means no transformation
firstKey
public Object firstKey()
getSortedMap
protected SortedMap getSortedMap()
Gets the map being decorated.
headMap
public SortedMap headMap(Object toKey)
lastKey
public Object lastKey()
subMap
public SortedMap subMap(Object fromKey,
Object toKey)
tailMap
public SortedMap tailMap(Object fromKey)
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