com.kangaroohy.dingtalk.entity.args.base.SupperArgs Maven / Gradle / Ivy
The newest version!
package com.kangaroohy.dingtalk.entity.args.base;
import com.kangaroohy.dingtalk.exception.DingTalkException;
import java.io.Serializable;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Consumer;
/**
* 类 BaseArgs 功能描述：
*
* @author kangaroo hy
* @version 0.0.1
* @date 2022/06/29 11:49
*/
public abstract class SupperArgs implements Serializable {
private static final long serialVersionUID = -6694631395300842240L;
public abstract static class Builder, A extends SupperArgs> {
protected List> operations;
/**
* 参数校验
*
* @param args 需要校验的实体
*/
protected abstract void validate(A args);
/**
* 校验不为空
*
* @param arg
* @param argName
*/
protected void validateNotNull(Object arg, String argName) {
if (arg == null) {
throw new DingTalkException(argName + " must not be null.");
}
}
/**
* 校验不为空，包括空串
*
* @param arg
* @param argName
*/
protected void validateNotEmptyString(String arg, String argName) {
validateNotNull(arg, argName);
if (arg.isEmpty()) {
throw new DingTalkException(argName + " must be a non-empty string.");
}
}
protected void validateNullOrNotEmptyString(String arg, String argName) {
if (arg != null && arg.isEmpty()) {
throw new DingTalkException(argName + " must be a non-empty string.");
}
}
protected void validateNullOrPositive(Number arg, String argName) {
if (arg != null && arg.longValue() < 0) {
throw new DingTalkException(argName + " cannot be non-negative.");
}
}
protected Builder() {
this.operations = new ArrayList<>();
}
@SuppressWarnings("unchecked")
private A newInstance() {
try {
for (Constructor constructor :
this.getClass().getEnclosingClass().getDeclaredConstructors()) {
if (constructor.getParameterCount() == 0) {
return (A) constructor.newInstance();
}
}
throw new DingTalkException(
this.getClass().getEnclosingClass() + " must have no argument constructor");
} catch (InstantiationException
| IllegalAccessException
| InvocationTargetException
| SecurityException e) {
// Args class must have no argument constructor with at least protected access.
throw new DingTalkException(e);
}
}
public A build() throws DingTalkException {
A args = newInstance();
operations.forEach(operation -> operation.accept(args));
validate(args);
return args;
}
}
}