Java通用方法优化：利用抽象父类处理相似请求对象

public record CreateObjectRequest (
    CustomObjectA a,
    CustomObjectB b,
    CustomObjectC c
) {}

public record UpdateObjectRequest (
    CustomObjectA a,
    CustomObjectB b
) {}

public class RequestValidator {
    public void validateRequest(CreateObjectRequest createObjectRequest) {
        // 大量相同的验证逻辑...
        System.out.println("Validating CreateObjectRequest...");
        // 示例：检查a和b是否为空
        if (createObjectRequest.a() == null) {
            throw new IllegalArgumentException("CustomObjectA cannot be null for CreateObjectRequest.");
        }
        if (createObjectRequest.b() == null) {
            throw new IllegalArgumentException("CustomObjectB cannot be null for CreateObjectRequest.");
        }
        // ... 其他验证
    }

    public void validateRequest(UpdateObjectRequest updateObjectRequest) {
        // 同样大量的验证逻辑...
        System.out.println("Validating UpdateObjectRequest...");
        // 示例：检查a和b是否为空
        if (updateObjectRequest.a() == null) {
            throw new IllegalArgumentException("CustomObjectA cannot be null for UpdateObjectRequest.");
        }
        if (updateObjectRequest.b() == null) {
            throw new IllegalArgumentException("CustomObjectB cannot be null for UpdateObjectRequest.");
        }
        // ... 其他验证
    }
}

// 假设 CustomObjectA 和 CustomObjectB 的基类或接口是 CustomObject
public abstract class ObjectRequest {
    protected CustomObject a;
    protected CustomObject b;

    // 构造函数、getter/setter（如果需要）
    public CustomObject getA() {
        return a;
    }

    public CustomObject getB() {
        return b;
    }
}

// CreateObjectRequest 继承 ObjectRequest
public class CreateObjectRequest extends ObjectRequest {
    private CustomObjectC c; // CreateObjectRequest 特有的字段

    public CreateObjectRequest(CustomObjectA a, CustomObjectB b, CustomObjectC c) {
        this.a = a; // 从父类继承的字段
        this.b = b; // 从父类继承的字段
        this.c = c;
    }

    public CustomObjectC getC() {
        return c;
    }
}

// UpdateObjectRequest 继承 ObjectRequest
public class UpdateObjectRequest extends ObjectRequest {
    // UpdateObjectRequest 没有特有的字段，或者有其他特有字段
    public UpdateObjectRequest(CustomObjectA a, CustomObjectB b) {
        this.a = a; // 从父类继承的字段
        this.b = b; // 从父类继承的字段
    }
}

public class RequestValidator {
    public void validateRequest(ObjectRequest objectRequest) {
        // 通用的验证逻辑，现在只需要编写一次
        System.out.println("Validating generic ObjectRequest...");

        // 访问父类中的共享字段
        if (objectRequest.getA() == null) {
            throw new IllegalArgumentException("CustomObjectA cannot be null.");
        }
        if (objectRequest.getB() == null) {
            throw new IllegalArgumentException("CustomObjectB cannot be null.");
        }

        // 如果需要针对特定子类进行额外验证，可以使用 instanceof
        if (objectRequest instanceof CreateObjectRequest createRequest) {
            System.out.println("Performing CreateObjectRequest specific validation.");
            if (createRequest.getC() == null) {
                throw new IllegalArgumentException("CustomObjectC cannot be null for CreateObjectRequest.");
            }
        } else if (objectRequest instanceof UpdateObjectRequest updateRequest) {
            System.out.println("Performing UpdateObjectRequest specific validation.");
            // 针对 UpdateObjectRequest 的特有验证
        }
        // ... 其他通用验证
    }
}