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 com.datastax.oss.driver.internal.querybuilder.select;
  
  import com.datastax.oss.driver.api.querybuilder.select.Selector;
  import com.datastax.oss.driver.internal.querybuilder.ArithmeticOperator;
  import com.datastax.oss.driver.shaded.guava.common.base.Preconditions;
  import edu.umd.cs.findbugs.annotations.NonNull;
  import net.jcip.annotations.Immutable;
  
  @Immutable
  public abstract class ArithmeticSelector implements Selector {
  
    protected final ArithmeticOperator operator;
  
    protected ArithmeticSelector(@NonNull ArithmeticOperator operator) {
      Preconditions.checkNotNull(operator);
      this.operator = operator;
    }
  
    @NonNull
    public ArithmeticOperator getOperator() {
      return operator;
    }
  
    protected static void appendAndMaybeParenthesize(
        int myPrecedence, @NonNull Selector child, @NonNull StringBuilder builder) {
      boolean parenthesize =
          (child instanceof ArithmeticSelector)
              && (((ArithmeticSelector) child).operator.getPrecedenceLeft() < myPrecedence);
      if (parenthesize) {
        builder.append('(');
      }
      child.appendTo(builder);
      if (parenthesize) {
        builder.append(')');
      }
    }
  }
  