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.rel.rules;
  
  import org.apache.calcite.plan.RelOptRuleCall;
  import org.apache.calcite.plan.RelOptTable;
  import org.apache.calcite.plan.RelRule;
  import org.apache.calcite.plan.ViewExpanders;
  import org.apache.calcite.rel.RelNode;
  import org.apache.calcite.rel.logical.LogicalTableScan;
  import org.apache.calcite.tools.RelBuilderFactory;
  
  import org.immutables.value.Value;
  
  /**
   * Planner rule that converts a
   * {@link org.apache.calcite.rel.logical.LogicalTableScan} to the result
   * of calling {@link RelOptTable#toRel}.
   *
   * @deprecated {@code org.apache.calcite.rel.core.RelFactories.TableScanFactoryImpl}
   * has called {@link RelOptTable#toRel(RelOptTable.ToRelContext)}.
   */
  @Deprecated // to be removed before 2.0
  @Value.Enclosing
  @SuppressWarnings("deprecation")
  public class TableScanRule extends RelRule<RelRule.Config>
      implements TransformationRule {
    //~ Static fields/initializers ---------------------------------------------
  
    public static final TableScanRule INSTANCE =
        Config.DEFAULT.toRule();
  
    //~ Constructors -----------------------------------------------------------
  
    /** Creates a TableScanRule. */
    protected TableScanRule(RelRule.Config config) {
      super(config);
    }
  
    @Deprecated // to be removed before 2.0
    public TableScanRule(RelBuilderFactory relBuilderFactory) {
      this(Config.DEFAULT.withRelBuilderFactory(relBuilderFactory));
    }
  
    //~ Methods ----------------------------------------------------------------
  
    @Override public void onMatch(RelOptRuleCall call) {
      final LogicalTableScan oldRel = call.rel(0);
      RelNode newRel =
          oldRel.getTable().toRel(
              ViewExpanders.simpleContext(oldRel.getCluster()));
      call.transformTo(newRel);
    }
  
    /** Rule configuration. */
    @Value.Immutable
    @SuppressWarnings("deprecation")
    public interface Config extends RelRule.Config {
      Config DEFAULT = ImmutableTableScanRule.Config.of()
          .withOperandSupplier(b -> b.operand(LogicalTableScan.class).noInputs());
  
      @Override default TableScanRule toRule() {
        return new TableScanRule(this);
      }
    }
  
  }
  