阿超 > 通过getter获取setter函数

通过getter获取setter函数

2023-04-24

java

勤劳的家庭，饥饿过其门而不入。——富兰克林

分享一个通过getter获取setter函数

放在：https://gitee.com/dromara/stream-query

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/**
 * 通过getter获取setter
 *
 * @param getter getter对应的lambda
 * @param <T>    getter参数类型
 * @param <R>    property类型
 * @return 返回setter对应的lambda
 */
public static <T, R> SerBiCons<T, R> getSetter(SerFunc<T, R> getter) {
  return getSetter(getter, SerBiCons.class);
}

/**
 * 通过getter获取setter
 *
 * @param getter     getter对应的lambda
 * @param lambdaType setter对应的lambda类型
 * @param <F>        getter对应的lambda类型
 * @param <C>        setter对应的lambda类型
 * @return 返回setter对应的lambda
 */
public static <F extends Serializable, C> C getSetter(F getter, Class<? super C> lambdaType) {
  LambdaExecutable executable = LambdaHelper.resolve(getter);
  Object setter = getSetter(executable.getClazz(), BeanHelper.getPropertyName(executable.getName()), lambdaType);
  return SerFunc.<Object, C>cast().apply(setter);
}

此处使用方式：

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@Test
void testGetSetter() {
  SerBiCons<LambdaExecutable, String> nameSetter = LambdaHelper.getSetter(LambdaExecutable.class, "name");
  LambdaExecutable executable = new LambdaExecutable();
  nameSetter.accept(executable, "kubernetes");
  Assertions.assertEquals("kubernetes", executable.getName());
  val lambda = LambdaHelper.getSetter(LambdaExecutable.class, "clazz", BiConsumer.class);
  BiConsumer<LambdaExecutable, Class<?>> clazzSetter = SerFunc.<BiConsumer<?, ?>, BiConsumer<LambdaExecutable, Class<?>>>cast().apply(lambda);
  clazzSetter.accept(executable, String.class);
  Assertions.assertEquals(String.class, executable.getClazz());
  clazzSetter = LambdaHelper.getSetter(LambdaExecutable::getClazz);
  clazzSetter.accept(executable, Object.class);
  Assertions.assertEquals(Object.class, executable.getClazz());
  SerBiCons<LambdaExecutable, String> nameSerSetter = LambdaHelper
          .<SerFunc<LambdaExecutable, String>, SerBiCons<LambdaExecutable, String>>
                  getSetter(LambdaExecutable::getName, SerBiCons.class);
  nameSerSetter.accept(executable, "serializable");
  Assertions.assertEquals("serializable", executable.getName());
}