/*
    *    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.where.condition;
  
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Objects;
  import java.util.function.Function;
  import java.util.function.Predicate;
  
  import org.jspecify.annotations.NonNull;
  import org.jspecify.annotations.Nullable;
  import org.mybatis.dynamic.sql.AbstractListValueCondition;
  
  public class IsInWhenPresent<T> extends AbstractListValueCondition<T>
          implements AbstractListValueCondition.Filterable<T>, AbstractListValueCondition.Mappable<T> {
      private static final IsInWhenPresent<?> EMPTY = new IsInWhenPresent<>(Collections.emptyList());
  
      public static <T> IsInWhenPresent<T> empty() {
          @SuppressWarnings("unchecked")
          IsInWhenPresent<T> t = (IsInWhenPresent<T>) EMPTY;
          return t;
      }
  
      protected IsInWhenPresent(Collection<T> values) {
          super(values.stream().filter(Objects::nonNull).toList());
      }
  
      @Override
      public String operator() {
          return "in"; //$NON-NLS-1$
      }
  
      @Override
      public IsInWhenPresent<T> filter(Predicate<? super @NonNull T> predicate) {
          return filterSupport(predicate, IsInWhenPresent::new, this, IsInWhenPresent::empty);
      }
  
      @Override
      public <R> IsInWhenPresent<R> map(Function<? super @NonNull T, ? extends @Nullable R> mapper) {
          return mapSupport(mapper, IsInWhenPresent::of, IsInWhenPresent::empty);
      }
  
      @SafeVarargs
      public static <T> IsInWhenPresent<T> of(@Nullable T... values) {
          return of(Arrays.asList(values));
      }
  
      public static <T> IsInWhenPresent<T> of(@Nullable Collection<@Nullable T> values) {
          if (values == null) {
              return empty();
          } else {
              return new IsInWhenPresent<>(values);
          }
      }
  }