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.redis;
  
  import org.apache.calcite.schema.Schema;
  import org.apache.calcite.schema.SchemaFactory;
  import org.apache.calcite.schema.SchemaPlus;
  
  import java.util.List;
  import java.util.Map;
  
  import static com.google.common.base.Preconditions.checkArgument;
  
  import static java.lang.Integer.parseInt;
  
  /**
   * Factory that creates a {@link RedisSchema}.
   *
   * <p>Allows a custom schema to be included in a redis-test-model.json file.
   * See <a href="http://calcite.apache.org/docs/file_adapter.html">File adapter</a>.
   */
  @SuppressWarnings("UnusedDeclaration")
  public class RedisSchemaFactory implements SchemaFactory {
    // public constructor, per factory contract
    public RedisSchemaFactory() {
    }
  
    @Override public Schema create(SchemaPlus schema, String name,
        Map<String, Object> operand) {
      checkArgument(operand.get("tables") != null,
          "tables must be specified");
      checkArgument(operand.get("host") != null,
          "host must be specified");
      checkArgument(operand.get("port") != null,
          "port must be specified");
      checkArgument(operand.get("database") != null,
          "database must be specified");
  
      @SuppressWarnings("unchecked") List<Map<String, Object>> tables =
          (List) operand.get("tables");
      String host = operand.get("host").toString();
      int port = (int) operand.get("port");
      int database = parseInt(operand.get("database").toString());
      String password = operand.get("password") == null ? null
          : operand.get("password").toString();
      return new RedisSchema(host, port, database, password, tables);
    }
  }
  