/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jena.util.iterator;
import java.util.Iterator;
import java.util.function.Function;
/**
An iterator that consumes an underlying iterator and maps its results before
delivering them; supports remove if the underlying iterator does.
*/
public class Map1Iterator<From, To> extends NiceIterator<To> implements ClosableIterator<To>
{
private Function<From, To> map;
private Iterator<From> base;
/**
* Construct a list of the converted.
* @param map The conversion to apply.
* @param base the iterator of elements to convert
*/
public Map1Iterator( Function<From, To> map, Iterator<From> base )
{
this.map = map;
this.base = base;
}
public @Override To next()
{ return map.apply( base.next() ); }
public @Override boolean hasNext()
{ return base.hasNext(); }
public @Override void remove()
{ base.remove(); }
@Override public void close()
{ NiceIterator.close( base ); }
}