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.rel.core.Join;
  import org.apache.calcite.rel.logical.LogicalJoin;
  import org.apache.calcite.tools.RelBuilderFactory;
  
  import org.immutables.value.Value;
  
  /**
   * Rule to convert an
   * {@link org.apache.calcite.rel.logical.LogicalJoin inner join} to a
   * {@link org.apache.calcite.rel.logical.LogicalFilter filter} on top of a
   * {@link org.apache.calcite.rel.logical.LogicalJoin cartesian inner join}.
   *
   * <p>One benefit of this transformation is that after it, the join condition
   * can be combined with conditions and expressions above the join.
   *
   * <p>Can be configured to match any sub-class of
   * {@link org.apache.calcite.rel.core.Join}, not just
   * {@link org.apache.calcite.rel.logical.LogicalJoin}.
   *
   * @see CoreRules#JOIN_EXTRACT_FILTER
   */
  @Value.Enclosing
  public final class JoinExtractFilterRule extends AbstractJoinExtractFilterRule {
  
    /** Creates a JoinExtractFilterRule. */
    JoinExtractFilterRule(Config config) {
      super(config);
    }
  
    @Deprecated // to be removed before 2.0
    public JoinExtractFilterRule(Class<? extends Join> clazz,
        RelBuilderFactory relBuilderFactory) {
      this(Config.DEFAULT
          .withRelBuilderFactory(relBuilderFactory)
          .withOperandSupplier(b ->
              b.operand(clazz).anyInputs())
          .as(Config.class));
    }
  
    /** Rule configuration. */
    @Value.Immutable
    public interface Config extends AbstractJoinExtractFilterRule.Config {
      Config DEFAULT = ImmutableJoinExtractFilterRule.Config.of()
          .withOperandSupplier(b -> b.operand(LogicalJoin.class).anyInputs());
  
      @Override default JoinExtractFilterRule toRule() {
        return new JoinExtractFilterRule(this);
      }
    }
  }
  