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.schemas.logicaltypes;
  
  import java.util.UUID;
  import org.apache.beam.sdk.schemas.Schema;
  import org.apache.beam.sdk.schemas.Schema.FieldType;
  import org.apache.beam.sdk.values.Row;
  
  /** Base class for types representing UUID as two long values. */
  public class UuidLogicalType implements Schema.LogicalType<UUID, Row> {
    public static final String IDENTIFIER = "beam:logical_type:uuid:v1";
    public static final String LEAST_SIGNIFICANT_BITS_FIELD_NAME = "LeastSignificantBits";
    public static final String MOST_SIGNIFICANT_BITS_FIELD_NAME = "MostSignificantBits";
    public static final Schema UUID_SCHEMA =
        Schema.builder()
            .addInt64Field(MOST_SIGNIFICANT_BITS_FIELD_NAME)
            .addInt64Field(LEAST_SIGNIFICANT_BITS_FIELD_NAME)
            .build();
  
    @Override
    public String getIdentifier() {
      return IDENTIFIER;
    }
  
    // unused
    @Override
    public Schema.FieldType getArgumentType() {
      return Schema.FieldType.STRING;
    }
  
    // unused
    @Override
    public String getArgument() {
      return "";
    }
  
    @Override
    public FieldType getBaseType() {
      return Schema.FieldType.row(UUID_SCHEMA);
    }
  
    @Override
    public Row toBaseType(UUID input) {
      return Row.withSchema(UUID_SCHEMA)
          .addValues(input.getMostSignificantBits(), input.getLeastSignificantBits())
          .build();
    }
  
    @Override
    public UUID toInputType(Row base) {
      Long leastSignificantBitsValue = base.getInt64(LEAST_SIGNIFICANT_BITS_FIELD_NAME);
      Long mostSignificantBitsValue = base.getInt64(MOST_SIGNIFICANT_BITS_FIELD_NAME);
      if (leastSignificantBitsValue == null || mostSignificantBitsValue == null) {
        throw new IllegalStateException(
            String.format(
                "Most (%s) and least (%s) significant bits value shouldn't be null for UUID",
                mostSignificantBitsValue, leastSignificantBitsValue));
      }
      return new UUID(mostSignificantBitsValue, leastSignificantBitsValue);
    }
  }
  