hazelcast-master/hazelcast/src/main/java/com/hazelcast/map/impl/iterator/MapQueryIterator.java
/*
 * Copyright (c) 2008-2023, Hazelcast, Inc. All Rights Reserved.
 *
 * 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.hazelcast.map.impl.iterator;

import com.hazelcast.map.impl.proxy.MapProxyImpl;
import com.hazelcast.projection.Projection;
import com.hazelcast.query.Predicate;

import java.util.Iterator;
import java.util.Map;

/**
 * Iterator for iterating the result of the projection on entries
 * in the whole cluster which satisfy the {@code predicate}. The values
 * are fetched in batches. The {@link Iterator#remove()} method is not
 * supported and will throw a {@link UnsupportedOperationException}.
 * It uses {@link MapQueryPartitionIterator} and the provided guarantees
 * are the same with it.
 *
 * @see MapQueryPartitionIterator
 */
public class MapQueryIterator<K, V, R> extends AbstractMapQueryIterator<R> {

    public MapQueryIterator(MapProxyImpl<K, V> mapProxy, int fetchSize, int partitionCount,
                            Projection<? super Map.Entry<K, V>, R> projection, Predicate<K, V> predicate) {
        super(partitionId -> mapProxy.iterator(fetchSize, partitionId, projection, predicate), partitionCount);
    }
}
