sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/rule/BeamIOSinkRule.java

/*
 * 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.
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package org.apache.beam.sdk.extensions.sql.impl.rule;

import java.util.Arrays;
import org.apache.beam.sdk.extensions.sql.impl.rel.BeamIOSinkRel;
import org.apache.beam.sdk.extensions.sql.impl.rel.BeamLogicalConvention;
import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.RelNode;
import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.convert.ConverterRule;
import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.core.TableModify;

/** A {@code ConverterRule} to replace {@link TableModify} with {@link BeamIOSinkRel}. */
public class BeamIOSinkRule extends ConverterRule {
  public static final BeamIOSinkRule INSTANCE = new BeamIOSinkRule();

  private BeamIOSinkRule() {
    super(
        BeamIOSinkRel.class,
        BeamLogicalConvention.INSTANCE,
        BeamLogicalConvention.INSTANCE,
        "BeamIOSinkRule");
  }

  @Override
  public RelNode convert(RelNode rel) {
    final RelNode convertedInput = convert(rel.getInput(0), rel.getTraitSet());
    return rel.copy(rel.getTraitSet(), Arrays.asList(convertedInput));
  }
}