SInterExecutor.java example

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You 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.apache.geode.redis.internal.executor.set;

import java.util.List;
import java.util.Set;

import org.apache.geode.redis.internal.ByteArrayWrapper;
import org.apache.geode.redis.internal.RedisConstants.ArityDef;

public class SInterExecutor extends SetOpExecutor {

  @Override
  protected boolean isStorage() {
    return false;
  }

  @Override
  protected Set<ByteArrayWrapper> setOp(Set<ByteArrayWrapper> firstSet,
      List<Set<ByteArrayWrapper>> setList) {
    if (firstSet == null)
      return null;
    for (Set<ByteArrayWrapper> set : setList) {
      if (set == null || set.isEmpty())
        return null;
      firstSet.retainAll(set);
    }
    return firstSet;
  }

  @Override
  public String getArgsError() {
    return ArityDef.SINTER;
  }

}