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.geode.simple;
  
  import org.apache.calcite.DataContext;
  import org.apache.calcite.linq4j.AbstractEnumerable;
  import org.apache.calcite.linq4j.Enumerable;
  import org.apache.calcite.linq4j.Enumerator;
  import org.apache.calcite.rel.type.RelDataType;
  import org.apache.calcite.rel.type.RelDataTypeFactory;
  import org.apache.calcite.schema.ScannableTable;
  import org.apache.calcite.schema.impl.AbstractTable;
  
  import org.apache.geode.cache.client.ClientCache;
  
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  import static org.apache.calcite.adapter.geode.util.GeodeUtils.convertToRowValues;
  
  /**
   * Geode Simple Scannable Table abstraction.
   */
  public class GeodeSimpleScannableTable extends AbstractTable implements ScannableTable {
  
    private final RelDataType relDataType;
    private final String regionName;
    private final ClientCache clientCache;
  
    public GeodeSimpleScannableTable(String regionName, RelDataType relDataType,
        ClientCache clientCache) {
      super();
  
      this.regionName = regionName;
      this.clientCache = clientCache;
      this.relDataType = relDataType;
    }
  
    @Override public String toString() {
      return "GeodeSimpleScannableTable";
    }
  
    @Override public RelDataType getRowType(RelDataTypeFactory typeFactory) {
      return relDataType;
    }
  
    @Override public Enumerable<@Nullable Object[]> scan(DataContext root) {
      return new AbstractEnumerable<@Nullable Object[]>() {
        @Override public Enumerator<@Nullable Object[]> enumerator() {
          return new GeodeSimpleEnumerator<@Nullable Object[]>(clientCache, regionName) {
            @Override public @Nullable Object[] convert(Object obj) {
              Object values = convertToRowValues(relDataType.getFieldList(), obj);
              if (values instanceof Object[]) {
                return (Object[]) values;
              }
              return new Object[]{values};
            }
          };
        }
      };
    }
  }
  