content: /*
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
   ~                                                                               ~
   ~ The MIT License (MIT)                                                         ~
   ~                                                                               ~
   ~ Copyright (c) 2015-2025 miaixz.org and other contributors.                    ~
   ~                                                                               ~
   ~ Permission is hereby granted, free of charge, to any person obtaining a copy  ~
   ~ of this software and associated documentation files (the "Software"), to deal ~
   ~ in the Software without restriction, including without limitation the rights  ~
   ~ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell     ~
   ~ copies of the Software, and to permit persons to whom the Software is         ~
   ~ furnished to do so, subject to the following conditions:                      ~
   ~                                                                               ~
   ~ The above copyright notice and this permission notice shall be included in    ~
   ~ all copies or substantial portions of the Software.                           ~
   ~                                                                               ~
   ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR    ~
   ~ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,      ~
   ~ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE   ~
   ~ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER        ~
   ~ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, ~
   ~ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN     ~
   ~ THE SOFTWARE.                                                                 ~
   ~                                                                               ~
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
  */
  package org.miaixz.bus.core.center.function;
  
  import java.io.Serial;
  import java.io.Serializable;
  import java.util.function.Function;
  
  import org.miaixz.bus.core.lang.Assert;
  
  /**
   * 两个函数的叠加函数. 叠加 {@code f: A->B} 和 {@code g: B->C}，效果等同于：{@code h(a) == g(f(a))}
   *
   * @param <A> 第一个函数的传入参数类型
   * @param <B> 第一个函数的返回类型（第二个函数有的参数类型）
   * @param <C> 最终结果类型
   * @author Kimi Liu
   * @since Java 17+
   */
  public class ComposeX<A, B, C> implements Function<A, C>, Serializable {
  
      @Serial
      private static final long serialVersionUID = 2852258708782L;
  
      private final Function<B, C> g;
      private final Function<A, ? extends B> f;
  
      /**
       * 构造
       *
       * @param g 函数1
       * @param f 函数2
       */
      public ComposeX(final Function<B, C> g, final Function<A, ? extends B> f) {
          this.g = Assert.notNull(g);
          this.f = Assert.notNull(f);
      }
  
      /**
       * 两个函数的叠加函数. 叠加 {@code f: A->B} 和 {@code g: B->C}，效果等同于：{@code h(a) == g(f(a))}
       *
       * @param g   第二个函数
       * @param f   第一个函数
       * @param <A> 第一个函数的传入参数类型
       * @param <B> 第一个函数的返回类型（第二个函数有的参数类型）
       * @param <C> 最终结果类型
       * @return 叠加函数
       */
      public static <A, B, C> ComposeX<A, B, C> of(final Function<B, C> g, final Function<A, ? extends B> f) {
          return new ComposeX<>(g, f);
      }
  
      @Override
      public C apply(final A a) {
          return g.apply(f.apply(a));
      }
  
  }
  