public class TransformedMap extends AbstractMapDecorator implements java.io.Serializable
Map
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 TransformedMap 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.synchronizedMap(Map)
. This class may throw
exceptions when accessed by concurrent threads without synchronization.
This class is Serializable from Commons Collections 3.1.
Modifier and Type | Method and Description |
---|---|
static java.util.Map |
decorate(java.util.Map map,
Transformer keyTransformer,
Transformer valueTransformer)
Factory method to create a transforming map.
|
static java.util.Map |
decorateTransform(java.util.Map map,
Transformer keyTransformer,
Transformer valueTransformer)
Factory method to create a transforming map that will transform
existing contents of the specified map.
|
java.util.Set |
entrySet() |
java.lang.Object |
put(java.lang.Object key,
java.lang.Object value) |
void |
putAll(java.util.Map mapToCopy) |
clear, containsKey, containsValue, equals, get, hashCode, isEmpty, keySet, remove, size, toString, values
public static java.util.Map decorate(java.util.Map map, Transformer keyTransformer, Transformer valueTransformer)
If there are any elements already in the map being decorated, they
are NOT transformed.
Constrast this with decorateTransform(java.util.Map, org.apache.commons.collections.Transformer, org.apache.commons.collections.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 transformationjava.lang.IllegalArgumentException
- if map is nullpublic static java.util.Map decorateTransform(java.util.Map map, Transformer keyTransformer, Transformer valueTransformer)
If there are any elements already in the map being decorated, they
will be transformed by this method.
Constrast this with decorate(java.util.Map, org.apache.commons.collections.Transformer, org.apache.commons.collections.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 transformationjava.lang.IllegalArgumentException
- if map is nullpublic java.lang.Object put(java.lang.Object key, java.lang.Object value)
put
in interface java.util.Map
put
in class AbstractMapDecorator
public void putAll(java.util.Map mapToCopy)
putAll
in interface java.util.Map
putAll
in class AbstractMapDecorator
public java.util.Set entrySet()
entrySet
in interface java.util.Map
entrySet
in class AbstractMapDecorator
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