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The reactive Postgres client

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/*
 * Copyright (C) 2017 Julien Viet
 *
 * 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 io.reactiverse.pgclient.impl;

import io.reactiverse.pgclient.Row;
import io.reactiverse.pgclient.Tuple;
import io.reactiverse.pgclient.impl.codec.encoder.MessageEncoder;
import io.reactiverse.pgclient.impl.codec.encoder.Parse;
import io.vertx.core.AsyncResult;
import io.vertx.core.Handler;

import java.util.Iterator;
import java.util.List;
import java.util.stream.Collector;

public class ExtendedBatchQueryCommand extends ExtendedQueryCommandBase {

  private final Iterator paramsIterator;

  ExtendedBatchQueryCommand(PreparedStatement ps,
                            Iterator paramsIterator,
                            boolean singleton,
                            Collector collector,
                            QueryResultHandler resultHandler,
                            Handler> handler) {
    this(ps, paramsIterator, 0, null, false, singleton, collector, resultHandler, handler);
  }

  ExtendedBatchQueryCommand(PreparedStatement ps,
                            Iterator paramsIterator,
                            int fetch,
                            String portal,
                            boolean suspended,
                            boolean singleton,
                            Collector collector,
                            QueryResultHandler resultHandler,
                            Handler> handler) {
    super(ps, fetch, portal, suspended, singleton, collector, resultHandler, handler);
    this.paramsIterator = paramsIterator;
  }

  @Override
  void exec(MessageEncoder out) {
    if (suspended) {
      out.writeExecute(portal, fetch);
      out.writeSync();
    } else {
      if (ps.bind.statement == 0) {
        out.writeParse(new Parse(ps.sql));
      }
      while (paramsIterator.hasNext()) {
        List