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-rw-r--r--vendor/google.golang.org/grpc/attributes/attributes.go101
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diff --git a/vendor/google.golang.org/grpc/attributes/attributes.go b/vendor/google.golang.org/grpc/attributes/attributes.go
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-/*
- *
- * Copyright 2019 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-// Package attributes defines a generic key/value store used in various gRPC
-// components.
-//
-// # Experimental
-//
-// Notice: This package is EXPERIMENTAL and may be changed or removed in a
-// later release.
-package attributes
-
-// Attributes is an immutable struct for storing and retrieving generic
-// key/value pairs. Keys must be hashable, and users should define their own
-// types for keys. Values should not be modified after they are added to an
-// Attributes or if they were received from one. If values implement 'Equal(o
-// interface{}) bool', it will be called by (*Attributes).Equal to determine
-// whether two values with the same key should be considered equal.
-type Attributes struct {
- m map[interface{}]interface{}
-}
-
-// New returns a new Attributes containing the key/value pair.
-func New(key, value interface{}) *Attributes {
- return &Attributes{m: map[interface{}]interface{}{key: value}}
-}
-
-// WithValue returns a new Attributes containing the previous keys and values
-// and the new key/value pair. If the same key appears multiple times, the
-// last value overwrites all previous values for that key. To remove an
-// existing key, use a nil value. value should not be modified later.
-func (a *Attributes) WithValue(key, value interface{}) *Attributes {
- if a == nil {
- return New(key, value)
- }
- n := &Attributes{m: make(map[interface{}]interface{}, len(a.m)+1)}
- for k, v := range a.m {
- n.m[k] = v
- }
- n.m[key] = value
- return n
-}
-
-// Value returns the value associated with these attributes for key, or nil if
-// no value is associated with key. The returned value should not be modified.
-func (a *Attributes) Value(key interface{}) interface{} {
- if a == nil {
- return nil
- }
- return a.m[key]
-}
-
-// Equal returns whether a and o are equivalent. If 'Equal(o interface{})
-// bool' is implemented for a value in the attributes, it is called to
-// determine if the value matches the one stored in the other attributes. If
-// Equal is not implemented, standard equality is used to determine if the two
-// values are equal. Note that some types (e.g. maps) aren't comparable by
-// default, so they must be wrapped in a struct, or in an alias type, with Equal
-// defined.
-func (a *Attributes) Equal(o *Attributes) bool {
- if a == nil && o == nil {
- return true
- }
- if a == nil || o == nil {
- return false
- }
- if len(a.m) != len(o.m) {
- return false
- }
- for k, v := range a.m {
- ov, ok := o.m[k]
- if !ok {
- // o missing element of a
- return false
- }
- if eq, ok := v.(interface{ Equal(o interface{}) bool }); ok {
- if !eq.Equal(ov) {
- return false
- }
- } else if v != ov {
- // Fallback to a standard equality check if Value is unimplemented.
- return false
- }
- }
- return true
-}