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Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC
/**
* Copyright (c) 2013-2024 Nikita Koksharov
*
* 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 org.redisson.misc;
import java.util.Iterator;
import java.util.NoSuchElementException;
/**
* @author Pepe Lu
*/
public class CompositeIterator implements Iterator {
private Iterator> listIterator;
private Iterator currentIterator;
private int limit;
private int counter;
public CompositeIterator(Iterator> iterators, int limit) {
listIterator = iterators;
this.limit = limit;
}
@Override
public boolean hasNext() {
if (currentIterator == null || !currentIterator.hasNext()) {
while (listIterator.hasNext()) {
Iterator iterator = listIterator.next();
currentIterator = iterator;
if (iterator.hasNext()) {
if (limit == 0) {
return true;
} else {
return limit >= counter + 1;
}
}
}
return false;
}
if (currentIterator.hasNext()) {
if (limit == 0) {
return true;
} else {
return limit >= counter + 1;
}
}
return false;
}
@Override
public T next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
counter++;
return currentIterator.next();
}
@Override
public void remove() {
if (currentIterator == null) {
throw new IllegalStateException("next() has not yet been called");
}
currentIterator.remove();
}
}
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