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.beam.sdk.extensions.sql.impl.utils;
  
  import java.io.Serializable;
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.rex.RexFieldAccess;
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.rex.RexInputRef;
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.rex.RexNode;
  
  /** SerializableRexNode. */
  public abstract class SerializableRexNode implements Serializable {
    public static SerializableRexNode.Builder builder(RexNode rexNode) {
      return new SerializableRexNode.Builder(rexNode);
    }
  
    /** SerializableRexNode.Builder. */
    public static class Builder {
      private RexNode rexNode;
  
      public Builder(RexNode rexNode) {
        this.rexNode = rexNode;
      }
  
      public SerializableRexNode build() {
        if (rexNode instanceof RexInputRef) {
          return new SerializableRexInputRef((RexInputRef) rexNode);
        } else if (rexNode instanceof RexFieldAccess) {
          return new SerializableRexFieldAccess((RexFieldAccess) rexNode);
        }
  
        throw new UnsupportedOperationException(
            "Does not support to convert " + rexNode.getType() + " to SerializableRexNode.");
      }
    }
  }
  