/*
    *    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.select.join;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Objects;
  import java.util.stream.Stream;
  
  import org.jspecify.annotations.Nullable;
  import org.mybatis.dynamic.sql.TableExpression;
  import org.mybatis.dynamic.sql.util.Validator;
  
  public class JoinModel {
      private final List<JoinSpecification> joinSpecifications = new ArrayList<>();
  
      private JoinModel(@Nullable List<JoinSpecification> joinSpecifications) {
          Objects.requireNonNull(joinSpecifications);
          Validator.assertNotEmpty(joinSpecifications, "ERROR.15"); //$NON-NLS-1$
          this.joinSpecifications.addAll(joinSpecifications);
      }
  
      public Stream<JoinSpecification> joinSpecifications() {
          return joinSpecifications.stream();
      }
  
      public static JoinModel of(@Nullable List<JoinSpecification> joinSpecifications) {
          return new JoinModel(joinSpecifications);
      }
  
      public boolean containsSubQueries() {
          return joinSpecifications.stream()
                  .map(JoinSpecification::table)
                  .anyMatch(TableExpression::isSubQuery);
      }
  }