content: /*
   * Copyright © 2018-2025 Commonwealth Scientific and Industrial Research
   * Organisation (CSIRO) ABN 41 687 119 230.
   *
   * Licensed 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 au.csiro.pathling.fhirpath.comparison;
  
  import jakarta.annotation.Nonnull;
  import org.apache.spark.sql.Column;
  
  /**
   * An implementation of {@link ColumnComparator} that uses the standard Spark SQL comparison
   * operators.
   */
  public class DefaultComparator implements ColumnComparator {
  
    private static final DefaultComparator INSTANCE = new DefaultComparator();
  
    /**
     * Gets the singleton instance of the {@link DefaultComparator}
     *
     * @return the singleton instance of {@link DefaultComparator}
     */
    @Nonnull
    public static DefaultComparator getInstance() {
      return INSTANCE;
    }
  
  
    private DefaultComparator() {
    }
  
    @Nonnull
    @Override
    public Column equalsTo(@Nonnull final Column left, @Nonnull final Column right) {
      return left.equalTo(right);
    }
  
    @Nonnull
    @Override
    public Column notEqual(@Nonnull final Column left, @Nonnull final Column right) {
      return left.notEqual(right);
    }
  
    @Nonnull
    @Override
    public Column lessThan(@Nonnull final Column left, @Nonnull final Column right) {
      return left.lt(right);
    }
  
    @Nonnull
    @Override
    public Column lessThanOrEqual(@Nonnull final Column left, @Nonnull final Column right) {
      return left.leq(right);
    }
  
    @Nonnull
    @Override
    public Column greaterThan(@Nonnull final Column left, @Nonnull final Column right) {
      return left.gt(right);
    }
  
    @Nonnull
    @Override
    public Column greaterThanOrEqual(@Nonnull final Column left, @Nonnull final Column right) {
      return left.geq(right);
    }
  }
  