hazelcast-master/hazelcast/src/test/java/com/hazelcast/internal/crdt/MergingOperation.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.internal.crdt;

import java.util.List;
import java.util.Random;

public class MergingOperation<C extends CRDT<C>, S> extends Operation<C, S> {
    private final int sourceIdx;

    MergingOperation(Random rnd) {
        super(rnd);
        this.sourceIdx = rnd.nextInt();
    }

    @Override
    protected void perform(List<C> crdts, S state) {
        final C target = getCRDT(crdts);
        int sourceIdx = rnd.nextInt(crdts.size());
        if (crdts.get(sourceIdx) == target) {
            sourceIdx = (sourceIdx + 1) % crdts.size();
        }
        target.merge(crdts.get(sourceIdx));
    }

    @Override
    public String toString() {
        return "Merge(" + crdtIndex + "," + sourceIdx + ")";
    }
}
