/*
    *    Copyright 2016-2025 the original author or authors.
    *
    *    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
    *
    *       https://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.mybatis.dynamic.sql.render;
  
  import java.util.Objects;
  import java.util.Optional;
  
  import org.jspecify.annotations.Nullable;
  import org.mybatis.dynamic.sql.SqlTable;
  
  public class TableAliasCalculatorWithParent implements TableAliasCalculator {
      private final TableAliasCalculator parent;
      private final TableAliasCalculator child;
  
      private TableAliasCalculatorWithParent(Builder builder) {
          parent = Objects.requireNonNull(builder.parent);
          child = Objects.requireNonNull(builder.child);
      }
  
      @Override
      public Optional<String> aliasForColumn(SqlTable table) {
          Optional<String> answer = child.aliasForColumn(table);
          if (answer.isPresent()) {
              return answer;
          }
          return parent.aliasForColumn(table);
      }
  
      @Override
      public Optional<String> aliasForTable(SqlTable table) {
          Optional<String> answer = child.aliasForTable(table);
          if (answer.isPresent()) {
              return answer;
          }
          return parent.aliasForTable(table);
      }
  
      public static class Builder {
          private @Nullable TableAliasCalculator parent;
          private @Nullable TableAliasCalculator child;
  
          public Builder withParent(TableAliasCalculator parent) {
              this.parent = parent;
              return this;
          }
  
          public Builder withChild(TableAliasCalculator child) {
              this.child = child;
              return this;
          }
  
          public TableAliasCalculatorWithParent build() {
              return new TableAliasCalculatorWithParent(this);
          }
      }
  }