/**
* 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.mahout.common.iterator;
import com.google.common.collect.AbstractIterator;
/**
* Iterates over the integers from 0 through {@code to-1}.
*/
public final class CountingIterator extends AbstractIterator<Integer> {
private int count;
private final int to;
public CountingIterator(int to) {
this.to = to;
}
@Override
protected Integer computeNext() {
if (count < to) {
return count++;
} else {
return endOfData();
}
}
}