org.macrocloud.kernel.toolkit.support.Try Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of kernel-toolkit Show documentation

There is a newer version: 1.1.0-RELEASE

package org.macrocloud.kernel.toolkit.support;

import org.macrocloud.kernel.toolkit.utils.Exceptions;
import org.springframework.lang.Nullable;

import java.util.Objects;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Supplier;


/**
 * Lambda 受检异常处理
 * https://segmentfault.com/a/1190000007832130
 *
 */
public class Try {

	/**
	 * Of.
	 *
	 * @param  the generic type
	 * @param  the generic type
	 * @param mapper the mapper
	 * @return the function
	 */
	public static  Function of(UncheckedFunction mapper) {
		Objects.requireNonNull(mapper);
		return t -> {
			try {
				return mapper.apply(t);
			} catch (Exception e) {
				throw Exceptions.unchecked(e);
			}
		};
	}

	/**
	 * Of.
	 *
	 * @param  the generic type
	 * @param mapper the mapper
	 * @return the consumer
	 */
	public static  Consumer of(UncheckedConsumer mapper) {
		Objects.requireNonNull(mapper);
		return t -> {
			try {
				mapper.accept(t);
			} catch (Exception e) {
				throw Exceptions.unchecked(e);
			}
		};
	}

	/**
	 * Of.
	 *
	 * @param  the generic type
	 * @param mapper the mapper
	 * @return the supplier
	 */
	public static  Supplier of(UncheckedSupplier mapper) {
		Objects.requireNonNull(mapper);
		return () -> {
			try {
				return mapper.get();
			} catch (Exception e) {
				throw Exceptions.unchecked(e);
			}
		};
	}

	/**
	 * The Interface UncheckedFunction.
	 *
	 * @param  the generic type
	 * @param  the generic type
	 */
	@FunctionalInterface
	public interface UncheckedFunction {
		
		/**
		 * apply.
		 *
		 * @param t the t
		 * @return the r
		 * @throws Exception the exception
		 */
		@Nullable
		R apply(@Nullable T t) throws Exception;
	}

	/**
	 * The Interface UncheckedConsumer.
	 *
	 * @param  the generic type
	 */
	@FunctionalInterface
	public interface UncheckedConsumer {
		
		/**
		 * accept.
		 *
		 * @param t the t
		 * @throws Exception the exception
		 */
		@Nullable
		void accept(@Nullable T t) throws Exception;
	}

	/**
	 * The Interface UncheckedSupplier.
	 *
	 * @param  the generic type
	 */
	@FunctionalInterface
	public interface UncheckedSupplier {
		
		/**
		 * get.
		 *
		 * @return the t
		 * @throws Exception the exception
		 */
		@Nullable
		T get() throws Exception;
	}
}