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.runtime.variant;
  
  import org.apache.calcite.runtime.rtti.RuntimeTypeInformation;
  
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  import java.math.RoundingMode;
  
  /** A value of VARIANT type that represents a SQL value
   * (The VARIANT type also has a null value which is different
   * from any other SQL value). */
  public abstract class VariantSqlValue extends VariantValue {
    final RuntimeTypeInformation.RuntimeSqlTypeName runtimeType;
  
    protected VariantSqlValue(RuntimeTypeInformation.RuntimeSqlTypeName runtimeType) {
      this.runtimeType = runtimeType;
    }
  
    @Override public String getTypeString() {
      return this.runtimeType.toString();
    }
  
    /**
     * Create a VariantValue from a specified SQL value and the runtime type information.
     *
     * @param object  SQL runtime value.
     * @param roundingMode  Rounding mode used for converting numeric values.
     * @param type    Runtime type information.
     * @return        The created VariantValue.
     */
    // Normally this method should be in the VariantValue class, but the Janino
    // compiler used by Calcite compiles to a Java version that does not
    // support static methods in interfaces.
    // This method is called from BuiltInMethods.VARIANT_CREATE.
    public static VariantValue create(
        RoundingMode roundingMode, @Nullable Object object, RuntimeTypeInformation type) {
      if (object == null) {
        return new VariantSqlNull(type.getTypeName());
      }
      return new VariantNonNull(roundingMode, object, type);
    }
  }
  