如何使用Golang过滤器构建器过滤空值？

import (
    "reflect"
    "github.com/your-package/filter"
)

type FilterRule struct {
    Field string
    Operator string
    Value interface{}
}

type FilterBuilder struct {
    rules []FilterRule
}

func (fb *FilterBuilder) AddRule(field string, operator string, value interface{}) {
    rule := FilterRule{
        Field: field,
        Operator: operator,
        Value: value,
    }
    fb.rules = append(fb.rules, rule)
}

func (fb *FilterBuilder) Build() filter.Filter {
    return func(item interface{}) bool {
        for _, rule := range fb.rules {
            fieldValue := reflect.ValueOf(item).FieldByName(rule.Field).Interface()
            switch rule.Operator {
            case "eq":
                if fieldValue != rule.Value {
                    return false
                }
            case "ne":
                if fieldValue == rule.Value {
                    return false
                }
            }
        }
        return true
    }
}

fb := FilterBuilder{}
fb.AddRule("Name", "eq", "")
fb.AddRule("Age", "ne", 0)
filter := fb.Build()

// 示例数据
type Person struct {
    Name string
    Age int
}

people := []Person{
    {Name: "Alice", Age: 25},
    {Name: "", Age: 30},
    {Name: "Bob", Age: 0},
}

filteredPeople := filter.Filter(people)
fmt.Println(filteredPeople)