initial import

core/errorx/batcherror.go

@@ -0,0 +1,45 @@
+package errorx
+
+import "bytes"
+
+type (
+	BatchError struct {
+		errs errorArray
+	}
+
+	errorArray []error
+)
+
+func (be *BatchError) Add(err error) {
+	if err != nil {
+		be.errs = append(be.errs, err)
+	}
+}
+
+func (be *BatchError) Err() error {
+	switch len(be.errs) {
+	case 0:
+		return nil
+	case 1:
+		return be.errs[0]
+	default:
+		return be.errs
+	}
+}
+
+func (be *BatchError) NotNil() bool {
+	return len(be.errs) > 0
+}
+
+func (ea errorArray) Error() string {
+	var buf bytes.Buffer
+
+	for i := range ea {
+		if i > 0 {
+			buf.WriteByte('\n')
+		}
+		buf.WriteString(ea[i].Error())
+	}
+
+	return buf.String()
+}