/*
    *    Copyright 2016-2026 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;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  
  public abstract class SqlCriterion {
  
      private final List<AndOrCriteriaGroup> subCriteria = new ArrayList<>();
  
      protected SqlCriterion() {
      }
  
      protected SqlCriterion(AbstractBuilder<?> builder) {
          subCriteria.addAll(builder.subCriteria);
      }
  
      public List<AndOrCriteriaGroup> subCriteria() {
          return Collections.unmodifiableList(subCriteria);
      }
  
      public abstract <R> R accept(SqlCriterionVisitor<R> visitor);
  
      protected abstract static class AbstractBuilder<T extends AbstractBuilder<T>> {
          private final List<AndOrCriteriaGroup> subCriteria = new ArrayList<>();
  
          public T withSubCriteria(List<AndOrCriteriaGroup> subCriteria) {
              this.subCriteria.addAll(subCriteria);
              return getThis();
          }
  
          protected abstract T getThis();
      }
  }