VOL-2408 - Refactor / Use voltha-lib-go Logging
Change-Id: I6e7d9eaba49c104cd50bb5692a2ff9733014fac4
diff --git a/vendor/go.uber.org/zap/zapcore/error.go b/vendor/go.uber.org/zap/zapcore/error.go
new file mode 100644
index 0000000..a67c7ba
--- /dev/null
+++ b/vendor/go.uber.org/zap/zapcore/error.go
@@ -0,0 +1,120 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package zapcore
+
+import (
+ "fmt"
+ "sync"
+)
+
+// Encodes the given error into fields of an object. A field with the given
+// name is added for the error message.
+//
+// If the error implements fmt.Formatter, a field with the name ${key}Verbose
+// is also added with the full verbose error message.
+//
+// Finally, if the error implements errorGroup (from go.uber.org/multierr) or
+// causer (from github.com/pkg/errors), a ${key}Causes field is added with an
+// array of objects containing the errors this error was comprised of.
+//
+// {
+// "error": err.Error(),
+// "errorVerbose": fmt.Sprintf("%+v", err),
+// "errorCauses": [
+// ...
+// ],
+// }
+func encodeError(key string, err error, enc ObjectEncoder) error {
+ basic := err.Error()
+ enc.AddString(key, basic)
+
+ switch e := err.(type) {
+ case errorGroup:
+ return enc.AddArray(key+"Causes", errArray(e.Errors()))
+ case fmt.Formatter:
+ verbose := fmt.Sprintf("%+v", e)
+ if verbose != basic {
+ // This is a rich error type, like those produced by
+ // github.com/pkg/errors.
+ enc.AddString(key+"Verbose", verbose)
+ }
+ }
+ return nil
+}
+
+type errorGroup interface {
+ // Provides read-only access to the underlying list of errors, preferably
+ // without causing any allocs.
+ Errors() []error
+}
+
+type causer interface {
+ // Provides access to the error that caused this error.
+ Cause() error
+}
+
+// Note that errArry and errArrayElem are very similar to the version
+// implemented in the top-level error.go file. We can't re-use this because
+// that would require exporting errArray as part of the zapcore API.
+
+// Encodes a list of errors using the standard error encoding logic.
+type errArray []error
+
+func (errs errArray) MarshalLogArray(arr ArrayEncoder) error {
+ for i := range errs {
+ if errs[i] == nil {
+ continue
+ }
+
+ el := newErrArrayElem(errs[i])
+ arr.AppendObject(el)
+ el.Free()
+ }
+ return nil
+}
+
+var _errArrayElemPool = sync.Pool{New: func() interface{} {
+ return &errArrayElem{}
+}}
+
+// Encodes any error into a {"error": ...} re-using the same errors logic.
+//
+// May be passed in place of an array to build a single-element array.
+type errArrayElem struct{ err error }
+
+func newErrArrayElem(err error) *errArrayElem {
+ e := _errArrayElemPool.Get().(*errArrayElem)
+ e.err = err
+ return e
+}
+
+func (e *errArrayElem) MarshalLogArray(arr ArrayEncoder) error {
+ return arr.AppendObject(e)
+}
+
+func (e *errArrayElem) MarshalLogObject(enc ObjectEncoder) error {
+ return encodeError("error", e.err, enc)
+}
+
+func (e *errArrayElem) Free() {
+ e.err = nil
+ _errArrayElemPool.Put(e)
+}