org.springframework.data.redis.support.collections.RedisIterator Maven / Gradle / Ivy
/*
* Copyright 2011-2018 the original author or authors.
*
* 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.springframework.data.redis.support.collections;
import java.util.Iterator;
import org.springframework.lang.Nullable;
/**
* Iterator extension for Redis collection removal.
*
* @author Costin Leau
*/
abstract class RedisIterator implements Iterator {
private final Iterator delegate;
private @Nullable E item;
/**
* Constructs a new RedisIterator
instance.
*
* @param delegate
*/
RedisIterator(Iterator delegate) {
this.delegate = delegate;
}
/**
* @return
* @see java.util.Iterator#hasNext()
*/
public boolean hasNext() {
return delegate.hasNext();
}
/**
* @return
* @see java.util.Iterator#next()
*/
public E next() {
item = delegate.next();
return item;
}
/**
* @see java.util.Iterator#remove()
*/
public void remove() {
delegate.remove();
removeFromRedisStorage(item);
item = null;
}
protected abstract void removeFromRedisStorage(E item);
}