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/*
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* JBind
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*
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* Copyright (c) by Stefan Wachter. All rights reserved.
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*
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* Usage, modification, and redistribution is subject to license terms that are
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* available at 'http://www.jbind.org'. The JBind license is like the
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* 'Apache Software License V 1.1'.
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*/
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package org.jbind.util.collection;
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import java.util.Iterator;
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public class TransformingIterator implements Iterator {
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private Iterator myIterator = null;
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private ITransformation myTransformation = null;
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/**
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* Interface which must be implemented in order to decide wheter objects
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* should be included in the iteration or not.
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*/
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public static interface ITransformation {
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/**
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* Transforms the iterated objects.
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*
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* @return <i>(optional)</i>. A transformed object.
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*/
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Object transform(Object anObject);
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}
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/**
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* Constructs a TransformingIterator, i.e. an iterator which returns as many
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* transformed objects as the source iterator contains objects.
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*
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* @param anIterator The iterator that should be transformed.
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* @param aTransformation The transformation that should be applied to the objects.
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*/
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public TransformingIterator(Iterator anIterator, ITransformation aTransformation) {
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myIterator = anIterator;
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myTransformation = aTransformation;
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}
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public Object next() {
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return myTransformation.transform(myIterator.next());
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}
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public boolean hasNext() {
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return myIterator.hasNext();
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}
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public void remove() {
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myIterator.remove();
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}
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}
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