metadata

Documentation

Overview

Package metadata contains implementations of types.Metadata.

Index

• func LazyCopy(m types.Metadata) types.Metadata
• type Type
  • func New(m map[string]string) *Type
  • func (m *Type) Copy() types.Metadata
  • func (m *Type) Delete(key string) types.Metadata
  • func (m *Type) Get(key string) string
  • func (m *Type) Iter(f func(k, v string) error) error
  • func (m *Type) Set(key, value string) types.Metadata

Functions

func LazyCopy

func LazyCopy(m types.Metadata) types.Metadata

LazyCopy takes an existing metadata object and returns a new implementation that lazily returns its values. If a call is made to edit the contents of the metadata then a copy is made of the original before doing so.

Types

type Type

type Type struct {
	// contains filtered or unexported fields
}

Type is an implementation of types.Metadata representing the metadata of a message part within a batch.

func New

func New(m map[string]string) *Type

New creates a new metadata implementation from a map[string]string. It is safe to provide a nil map.

func (*Type) Copy

func (m *Type) Copy() types.Metadata

Copy returns a copy of the metadata object that can be edited without changing the contents of the original.

func (*Type) Delete

func (m *Type) Delete(key string) types.Metadata

Delete removes the value of a metadata key.

func (*Type) Get

func (m *Type) Get(key string) string

Get returns a metadata value if a key exists, otherwise an empty string.

func (*Type) Iter

func (m *Type) Iter(f func(k, v string) error) error

Iter iterates each metadata key/value pair.

func (*Type) Set

func (m *Type) Set(key, value string) types.Metadata

Set sets the value of a metadata key.