com.swirlds.common.test.set.HotspotSetIterator Maven / Gradle / Ivy
/*
* Copyright (C) 2018-2023 Hedera Hashgraph, LLC
*
* 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.swirlds.common.test.set;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
/**
* This iterator walks over elements in a {@link HotspotHashSet}.
*
* @param
* the type of element in the set
*/
public class HotspotSetIterator implements Iterator {
private final List> sets;
private Iterator setIterator;
private int nextIndex;
public HotspotSetIterator(final List> sets) {
this.sets = sets;
}
/**
* {@inheritDoc}
*/
@Override
public boolean hasNext() {
while (setIterator == null || !setIterator.hasNext()) {
if (nextIndex >= sets.size()) {
return false;
}
setIterator = sets.get(nextIndex).iterator();
nextIndex++;
}
return true;
}
/**
* {@inheritDoc}
*/
@Override
public T next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
return setIterator.next();
}
}