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Dahua ICC Open API SDK for Java

There is a newer version: 1.0.13.7

package com.dahuatech.hutool.core.lang;

import com.dahuatech.hutool.core.lang.mutable.MutableObj;

/**
 * 为不可变的对象引用提供一个可变的包装，在java中支持引用传递。
 *
 * @author Looly
 * @param  所持有值类型
 */
public final class Holder extends MutableObj {
  private static final long serialVersionUID = -3119568580130118011L;

  /** 构造 */
  public Holder() {
    super();
  }

  // --------------------------------------------------------------------------- Constructor start
  /**
   * 构造
   *
   * @param value 被包装的对象
   */
  public Holder(T value) {
    super(value);
  }

  /**
   * 新建Holder类，持有指定值，当值为空时抛出空指针异常
   *
   * @param  被持有的对象类型
   * @param value 值，不能为空
   * @return Holder
   */
  public static  Holder of(T value) throws NullPointerException {
    if (null == value) {
      throw new NullPointerException("Holder can not hold a null value!");
    }
    return new Holder<>(value);
  }
  // --------------------------------------------------------------------------- Constructor end
}