io.druid.java.util.common.guava.MergeIterable Maven / Gradle / Ivy
/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets 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 io.druid.java.util.common.guava;
import com.google.common.collect.Lists;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
/**
*/
public class MergeIterable implements Iterable
{
private final Comparator comparator;
private final Iterable> baseIterables;
public MergeIterable(
Comparator comparator,
Iterable> baseIterables
)
{
this.comparator = comparator;
this.baseIterables = baseIterables;
}
@Override
public Iterator iterator()
{
List> iterators = Lists.newArrayList();
for (Iterable baseIterable : baseIterables) {
iterators.add(baseIterable.iterator());
}
return new MergeIterator<>(comparator, iterators);
}
}