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.rel.type.RelDataType;
  import org.apache.calcite.rel.type.RelDataTypeImpl;
  import org.apache.calcite.rel.type.RelProtoDataType;
  import org.apache.calcite.schema.SchemaPlus;
  import org.apache.calcite.schema.Table;
  import org.apache.calcite.schema.TableFactory;
  
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  import java.util.Map;
  
  /**
   * Implementation of {@link TableFactory} for Redis.
   *
   * <p>A table corresponds to what Redis calls a "data source".
   */
  public class RedisTableFactory implements TableFactory {
    @SuppressWarnings("unused")
    public static final RedisTableFactory INSTANCE = new RedisTableFactory();
  
    private RedisTableFactory() {
    }
  
    // name that is also the same name as a complex metric
    @Override public Table create(SchemaPlus schema, String tableName, Map operand,
        @Nullable RelDataType rowType) {
      final RedisSchema redisSchema = schema.unwrap(RedisSchema.class);
      final RelProtoDataType protoRowType =
          rowType != null ? RelDataTypeImpl.proto(rowType) : null;
      return RedisTable.create(redisSchema, tableName, operand, protoRowType);
    }
  }
  