/*
* Copyright 2011 Goldman Sachs.
*
* Licensed 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 com.gs.collections.impl.lazy.iterator;
import java.util.Iterator;
import java.util.NoSuchElementException;
/**
* Iterates over the first count elements of the iterator or the full size of the iterator
* if the count is greater than the length of the receiver.
*/
public final class TakeIterator<T> implements Iterator<T>
{
private final Iterator<T> iterator;
private final int count;
private int currentIndex;
public TakeIterator(Iterable<T> iterable, int count)
{
this(iterable.iterator(), count);
}
public TakeIterator(Iterator<T> iterator, int count)
{
this.iterator = iterator;
this.count = count;
}
public boolean hasNext()
{
return this.currentIndex < this.count && this.iterator.hasNext();
}
public T next()
{
if (this.hasNext())
{
this.currentIndex++;
return this.iterator.next();
}
throw new NoSuchElementException();
}
public void remove()
{
throw new UnsupportedOperationException("Cannot remove from a take iterator");
}
}