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multierror.go
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multierror.go
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package candihelper
import (
"errors"
"fmt"
"strings"
"sync"
)
type (
multiError struct {
lock sync.Mutex
errs map[string]string
}
)
// NewMultiError constructor
func NewMultiError() MultiError {
return &multiError{errs: make(map[string]string)}
}
// Append error to multierror
func (m *multiError) Append(key string, err error) MultiError {
m.lock.Lock()
defer m.lock.Unlock()
if err != nil {
m.errs[key] = err.Error()
}
return m
}
// HasError check if err is exist
func (m *multiError) HasError() bool {
return len(m.errs) != 0
}
// IsNil check if err is nil
func (m *multiError) IsNil() bool {
return len(m.errs) == 0
}
// Clear make empty list of errors
func (m *multiError) Clear() {
m.errs = map[string]string{}
}
// ToMap return list map of error
func (m *multiError) ToMap() map[string]string {
return m.errs
}
// Merge from another multi error
func (m *multiError) Merge(e MultiError) MultiError {
for k, v := range e.ToMap() {
m.Append(k, errors.New(v))
}
return m
}
// Error implement error from multiError
func (m *multiError) Error() string {
var str []string
for i, s := range m.errs {
str = append(str, fmt.Sprintf("%s: %s", i, s))
}
return strings.Join(str, "\n")
}