org.apache.hudi.common.util.collection.MappingIterator Maven / Gradle / Ivy
/*
* 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.hudi.common.util.collection;
import java.util.Iterator;
import java.util.function.Function;
/**
* Iterator mapping elements of the provided source {@link Iterator} from {@code I} to {@code O}
*/
public class MappingIterator implements Iterator {
protected final Iterator source;
private final Function mapper;
public MappingIterator(Iterator source, Function mapper) {
this.source = source;
this.mapper = mapper;
}
@Override
public boolean hasNext() {
return source.hasNext();
}
@Override
public O next() {
return mapper.apply(source.next());
}
}