org.apache.commons.collections.collection
Class TransformedCollection
- Collection, Serializable
public class TransformedCollection
Decorates another
Collection
to transform objects that are added.
The add methods 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.
This class is Serializable from Commons Collections 3.1.
$Revision: 1.7 $ $Date: 2004/06/03 22:02:13 $
boolean | add(Object object)
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boolean | addAll(Collection coll)
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static Collection | decorate(Collection coll, Transformer transformer) - Factory method to create a transforming collection.
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protected Collection | transform(Collection coll) - Transforms a collection.
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protected Object | transform(Object object) - Transforms an object.
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add , addAll , clear , contains , containsAll , equals , getCollection , hashCode , isEmpty , iterator , remove , removeAll , retainAll , size , toArray , toArray , toString |
transformer
protected final Transformer transformer
The transformer to use
TransformedCollection
protected TransformedCollection(Collection coll,
Transformer transformer)
Constructor that wraps (not copies).
If there are any elements already in the collection being decorated, they
are NOT transformed.
coll
- the collection to decorate, must not be nulltransformer
- the transformer to use for conversion, must not be null
decorate
public static Collection decorate(Collection coll,
Transformer transformer)
Factory method to create a transforming collection.
If there are any elements already in the collection being decorated, they
are NOT transformed.
coll
- the collection to decorate, must not be nulltransformer
- the transformer to use for conversion, must not be null
- a new transformed collection
transform
protected Collection transform(Collection coll)
Transforms a collection.
The transformer itself may throw an exception if necessary.
coll
- the collection to transform
transform
protected Object transform(Object object)
Transforms an object.
The transformer itself may throw an exception if necessary.
object
- the object to transform
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