content: /*
   * 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.calcite.adapter.splunk;
  
  import org.apache.calcite.adapter.splunk.search.SplunkConnection;
  import org.apache.calcite.adapter.splunk.util.StringUtils;
  import org.apache.calcite.linq4j.AbstractEnumerable;
  import org.apache.calcite.linq4j.Enumerator;
  
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Query against Splunk.
   *
   * @param <T> Element type
   */
  public class SplunkQuery<T> extends AbstractEnumerable<T> {
    private final SplunkConnection splunkConnection;
    private final String search;
    private final @Nullable String earliest;
    private final @Nullable String latest;
    private final @Nullable List<String> fieldList;
  
    /** Creates a SplunkQuery. */
    public SplunkQuery(
        SplunkConnection splunkConnection,
        String search,
        @Nullable String earliest,
        @Nullable String latest,
        @Nullable List<String> fieldList) {
      this.splunkConnection =
          requireNonNull(splunkConnection, "splunkConnection");
      this.search = requireNonNull(search, "search");
      this.earliest = earliest;
      this.latest = latest;
      this.fieldList = fieldList;
    }
  
    @Override public String toString() {
      return "SplunkQuery {" + search + "}";
    }
  
    @Override public Enumerator<T> enumerator() {
      //noinspection unchecked
      return (Enumerator<T>) splunkConnection.getSearchResultEnumerator(
          search, getArgs(), fieldList);
    }
  
    private Map<String, String> getArgs() {
      Map<String, String> args = new HashMap<>();
      if (fieldList != null) {
        String fields =
            StringUtils.encodeList(fieldList, ',').toString();
        args.put("field_list", fields);
      }
      if (earliest != null) {
        args.put("earliest_time", earliest);
      }
      if (latest != null) {
        args.put("latest_time", latest);
      }
      return args;
    }
  }
  