serialization

package
v1.0.0-preview.1 Latest Latest
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 Go to latest Published: May 7, 2021 License: Apache-2.0 Imports: 1 Imported by: 54

Documentation

Overview

Package serialization serializes user objects to Data and back to Object. Data is the internal representation of binary data in Hazelcast.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type ClassDefinition 

type ClassDefinition interface {
	// FactoryID returns factory ID of struct.
	FactoryID() int32

	// ClassID returns class ID of struct.
	ClassID() int32

	// Version returns version of struct.
	Version() int32

	// Field returns field definition of field by given Name.
	Field(name string) FieldDefinition

	// FieldCount returns the number of fields in struct.
	FieldCount() int
}

ClassDefinition defines a class schema for Portable structs.

type Config 

type Config struct {
	// BigEndian is the Little Endinan byte order bool. If false, it is Big Endian.
	BigEndian bool
	// IdentifiedDataSerializableFactories is a map of factory IDs and corresponding IdentifiedDataSerializable factories.
	IdentifiedDataSerializableFactories map[int32]IdentifiedDataSerializableFactory
	// PortableFactories is a map of factory IDs and corresponding Portable factories.
	PortableFactories map[int32]PortableFactory
	// PortableVersion will be used to differentiate two versions of the same struct that have changes on the struct,
	// like adding/removing a field or changing a type of a field.
	PortableVersion int32
	// CustomSerializers is a map of object types and corresponding custom serializers.
	CustomSerializers map[reflect.Type]Serializer
	// GlobalSerializer is the serializer that will be used if no other serializer is applicable.
	GlobalSerializer Serializer
	// ClassDefinitions contains ClassDefinitions for portable structs.
	ClassDefinitions []ClassDefinition
}

Config contains the serialization configuration of a Hazelcast instance.

func (Config) Clone added in v1.0.0 

func (c Config) Clone() Config

type Data 

type Data interface {
	// Buffer returns byte array representation of internal binary format.
	Buffer() []byte

	ToByteArray() []byte

	// Type returns serialization type of binary form.
	Type() int32

	// TotalSize returns the total size of Data in bytes.
	TotalSize() int

	// DataSize returns size of internal binary data in bytes.
	DataSize() int

	// PartitionHash returns partition hash calculated for serialized object.
	PartitionHash() int32
}

Data is the basic unit of serialization. It stores binary form of an object serialized by serialization service's ToData() method.

type DataInput 

type DataInput interface {
	// Error returns the first error encountered by DataInput.
	Error() error

	// Position returns the head position in the byte array.
	Position() int32

	// SetPosition sets the head position in the byte array.
	SetPosition(pos int32)

	// ReadByte returns byte read .
	// It returns zero if an error is set previously.
	ReadByte() byte

	// ReadBool returns bool read.
	// It returns false if an error is set previously.
	ReadBool() bool

	// ReadUInt16 returns uint16 read.
	// It returns zero if an error is set previously.
	ReadUInt16() uint16

	// ReadInt16 returns int16 read.
	// It returns zero if an error is set previously.
	ReadInt16() int16

	// ReadInt32 returns int32 read.
	// It returns zero if an error is set previously.
	ReadInt32() int32

	// ReadInt64 returns int64 read.
	// It returns zero if an error is set previously.
	ReadInt64() int64

	// ReadFloat32 returns float32 read.
	// It returns zero if an error is set previously.
	ReadFloat32() float32

	// ReadFloat64 returns float64 read.
	// It returns zero if an error is set previously.
	ReadFloat64() float64

	// ReadString returns string read.
	// It returns empty string if an error is set previously.
	ReadString() string

	// ReadObject returns object read.
	// It returns nil if an error is set previously.
	ReadObject() interface{}

	// ReadData returns Data read.
	// It returns nil if an error is set previously.
	ReadData() Data

	// ReadByteArray returns []byte read.
	// It returns nil if an error is set previously.
	ReadByteArray() []byte

	// ReadBoolArray returns []bool read.
	// It returns nil if an error is set previously.
	ReadBoolArray() []bool

	// ReadUInt16Array returns []uint16 read.
	// It returns nil if an error is set previously.
	ReadUInt16Array() []uint16

	// ReadInt16Array returns []int16 read.
	// It returns nil if an error is set previously.
	ReadInt16Array() []int16

	// ReadInt32Array returns []int32 read.
	// It returns nil if an error is set previously.
	ReadInt32Array() []int32

	// ReadInt64Array returns []int64 read.
	// It returns nil if an error is set previously.
	ReadInt64Array() []int64

	// ReadFloat32Array returns []float32 read.
	// It returns nil if an error is set previously.
	ReadFloat32Array() []float32

	// ReadFloat64Array returns []float64 read.
	// It returns nil if an error is set previously.
	ReadFloat64Array() []float64

	// ReadUTFArray returns []string read.
	// It returns nil if an error is set previously.
	ReadUTFArray() []string
}

DataInput provides deserialization methods. If any of the methods results in an error, all following methods will return the zero value for that type immediately. Example usage: 

field1 = input.ReadString()
field2 = input.ReadString()
return input.Error()

type DataOutput 

type DataOutput interface {
	// Position returns the head position in the byte array.
	Position() int32

	// SetPosition sets the head position in the byte array.
	SetPosition(pos int32)

	// WriteByte writes a byte.
	WriteByte(v byte) error

	// WriteBool writes a bool.
	WriteBool(v bool)

	// WriteUInt16 writes an uint16.
	WriteUInt16(v uint16)

	// WriteInt16 writes an int16.
	WriteInt16(v int16)

	// WriteInt32 writes an int32.
	WriteInt32(v int32)

	// WriteInt64 writes an int64.
	WriteInt64(v int64)

	// WriteFloat32 writes a float32.
	WriteFloat32(v float32)

	// WriteFloat64 writes a float64.
	WriteFloat64(v float64)

	// WriteString writes a string in UTF-8 format.
	WriteString(v string)

	// WriteObject writes an object.
	WriteObject(i interface{}) error

	// WriteData writes an Data.
	WriteData(data Data)

	// WriteByteArray writes a []byte.
	WriteByteArray(v []byte)

	// WriteBoolArray writes a []bool.
	WriteBoolArray(v []bool)

	// WriteUInt16Array writes an []uint16.
	WriteUInt16Array(v []uint16)

	// WriteInt16Array writes an []int16.
	WriteInt16Array(v []int16)

	// WriteInt32Array writes an []int32.
	WriteInt32Array(v []int32)

	// WriteInt64Array writes an []int64.
	WriteInt64Array(v []int64)

	// WriteFloat32Array writes a []float32.
	WriteFloat32Array(v []float32)

	// WriteFloat64Array writes a []float64.
	WriteFloat64Array(v []float64)

	// WriteStringArray writes a []string in UTF-8 format.
	WriteStringArray(v []string)

	// WriteBytes writes a string's characters.
	WriteBytes(bytes string)

	// WriteZeroBytes writes zero bytes as given length.
	WriteZeroBytes(count int)
}

DataOutput provides serialization methods.

type FieldDefinition 

type FieldDefinition interface {
	// Type returns field type.
	Type() int32

	// Name returns field Name.
	Name() string

	// Index returns field index.
	Index() int32

	// ClassID returns class ID of this field's struct.
	ClassID() int32

	// FactoryID returns factory ID of this field's struct.
	FactoryID() int32

	// Version returns version of this field's struct.
	Version() int32
}

FieldDefinition defines Name, type, index of a field.

type IdentifiedDataSerializable 

type IdentifiedDataSerializable interface {
	// FactoryID returns IdentifiedDataSerializableFactory factory ID for this struct.
	FactoryID() (factoryID int32)

	// ClassID returns type identifier for this struct. It should be unique per IdentifiedDataSerializableFactory.
	ClassID() (classID int32)

	// WriteData writes object fields to output stream.
	WriteData(output DataOutput) (err error)

	// ReadData reads fields from the input stream.
	ReadData(input DataInput) (err error)
}

IdentifiedDataSerializable is a serialization method as an alternative to standard Gob serialization. Each IdentifiedDataSerializable is created by a registered IdentifiedDataSerializableFactory.

type IdentifiedDataSerializableFactory 

type IdentifiedDataSerializableFactory interface {
	// Creates an IdentifiedDataSerializable instance using given type ID.
	Create(id int32) (instance IdentifiedDataSerializable)
	// FactoryID returns the factory ID.
	FactoryID() int32
}

IdentifiedDataSerializableFactory is used to create IdentifiedDataSerializable instances during deserialization.

type JSON added in v1.0.0 

type JSON []byte

func (JSON) String added in v1.0.0 

func (j JSON) String() string

type Portable 

type Portable interface {
	// FactoryID returns PortableFactory ID for this portable struct.
	FactoryID() (factoryID int32)

	// ClassID returns type identifier for this portable struct. Class ID should be unique per PortableFactory.
	ClassID() (classID int32)

	// WritePortable serializes this portable object using PortableWriter.
	WritePortable(writer PortableWriter) (err error)

	// ReadPortable reads portable fields using PortableReader.
	ReadPortable(reader PortableReader) (err error)
}

Portable provides an alternative serialization method. Instead of relying on reflection, each Portable is created by a registered PortableFactory. Portable serialization has the following advantages: * Supporting multiversion of the same object type. * Fetching individual fields without having to rely on reflection. * Querying and indexing support without deserialization and/or reflection.

type PortableFactory 

type PortableFactory interface {
	// Create creates a Portable instance using given class ID and
	// returns portable instance or nil if class ID is not known by this factory.
	Create(classID int32) (instance Portable)
	// FactoryID returns the factory ID.
	FactoryID() int32
}

PortableFactory is used to create Portable instances during deserialization.

type PortableReader 

type PortableReader interface {

	// Error returns the first error encountered by Portable Reader.
	Error() error

	// ReadByte takes fieldName Name of the field and returns the byte value read.
	// It returns zero if an error is set previously.
	ReadByte(fieldName string) byte

	// ReadBool takes fieldName Name of the field and returns the bool value read.
	// It returns false if an error is set previously.
	ReadBool(fieldName string) bool

	// ReadUInt16 takes fieldName Name of the field and returns the uint16 value read.
	// It returns zero if an error is set previously.
	ReadUInt16(fieldName string) uint16

	// ReadInt16 takes fieldName Name of the field and returns the int16 value read.
	// It returns zero if an error is set previously.
	ReadInt16(fieldName string) int16

	// ReadInt32 takes fieldName Name of the field and returns the int32 value read.
	// It returns zero if an error is set previously.
	ReadInt32(fieldName string) int32

	// ReadInt64 takes fieldName Name of the field and returns the int64 value read.
	// It returns zero if an error is set previously.
	ReadInt64(fieldName string) int64

	// ReadFloat32 takes fieldName Name of the field and returns the float32 value read.
	// It returns zero if an error is set previously.
	ReadFloat32(fieldName string) float32

	// ReadFloat64 takes fieldName Name of the field and returns the float64 value read.
	// It returns zero if an error is set previously.
	ReadFloat64(fieldName string) float64

	// ReadUTF takes fieldName Name of the field and returns the string value read.
	// It returns empty string if an error is set previously.
	ReadString(fieldName string) string

	// ReadPortable takes fieldName Name of the field and returns the Portable value read.
	// It returns nil if an error is set previously.
	ReadPortable(fieldName string) Portable

	// ReadByteArray takes fieldName Name of the field and returns the []byte value read.
	// It returns nil if an error is set previously.
	ReadByteArray(fieldName string) []byte

	// ReadBoolArray takes fieldName Name of the field and returns the []bool value read.
	// It returns nil if an error is set previously.
	ReadBoolArray(fieldName string) []bool

	// ReadUInt16Array takes fieldName Name of the field and returns the []uint16 value read.
	// It returns nil if an error is set previously.
	ReadUInt16Array(fieldName string) []uint16

	// ReadInt16Array takes fieldName Name of the field and returns the []int16 value read.
	// It returns nil if an error is set previously.
	ReadInt16Array(fieldName string) []int16

	// ReadInt32Array takes fieldName Name of the field and returns the []int32 value read.
	// It returns nil if an error is set previously.
	ReadInt32Array(fieldName string) []int32

	// ReadInt64Array takes fieldName Name of the field and returns the []int64 value read.
	// It returns nil if an error is set previously.
	ReadInt64Array(fieldName string) []int64

	// ReadFloat32Array takes fieldName Name of the field and returns the []float32 value read.
	// It returns nil if an error is set previously.
	ReadFloat32Array(fieldName string) []float32

	// ReadFloat64Array takes fieldName Name of the field and returns the []float64 value read.
	// It returns nil if an error is set previously.
	ReadFloat64Array(fieldName string) []float64

	// ReadUTFArray takes fieldName Name of the field and returns the []string value read.
	// It returns nil if an error is set previously.
	ReadStringArray(fieldName string) []string

	// ReadPortableArray takes fieldName Name of the field and returns the []Portable value read.
	// It returns nil if an error is set previously.
	ReadPortableArray(fieldName string) []Portable
}

PortableReader provides a mean of reading portable fields from a binary in form of go primitives arrays of go primitives, nested portable fields and array of portable fields. Example usage: 

	s.id = reader.ReadInt16("id")
 s.age = reader.ReadInt32("age")
 return reader.Error()

type PortableWriter 

type PortableWriter interface {
	// WriteByte writes a byte with fieldName.
	WriteByte(fieldName string, value byte)

	// WriteBool writes a bool with fieldName.
	WriteBool(fieldName string, value bool)

	// WriteUInt16 writes a uint16 with fieldName.
	WriteUInt16(fieldName string, value uint16)

	// WriteInt16 writes a int16 with fieldName.
	WriteInt16(fieldName string, value int16)

	// WriteInt32 writes a int32 with fieldName.
	WriteInt32(fieldName string, value int32)

	// WriteInt64 writes a int64 with fieldName.
	WriteInt64(fieldName string, value int64)

	// WriteFloat32 writes a float32 with fieldName.
	WriteFloat32(fieldName string, value float32)

	// WriteFloat64 writes a float64 with fieldName.
	WriteFloat64(fieldName string, value float64)

	// WriteString writes a string in UTF-8 format with fieldName.
	WriteString(fieldName string, value string)

	// WritePortable writes a Portable with fieldName.
	WritePortable(fieldName string, value Portable) error

	// WriteNilPortable writes a NilPortable with fieldName, factoryID and classID.
	WriteNilPortable(fieldName string, factoryID int32, classID int32) error

	// WriteByteArray writes a []byte with fieldName.
	WriteByteArray(fieldName string, value []byte)

	// WriteBoolArray writes a []bool with fieldName.
	WriteBoolArray(fieldName string, value []bool)

	// WriteUInt16Array writes a []uint16 with fieldName.
	WriteUInt16Array(fieldName string, value []uint16)

	// WriteInt16Array writes a []int16 with fieldName.
	WriteInt16Array(fieldName string, value []int16)

	// WriteInt32Array writes a []int32 with fieldName.
	WriteInt32Array(fieldName string, value []int32)

	// WriteInt64Array writes a []int64 with fieldName.
	WriteInt64Array(fieldName string, value []int64)

	// WriteFloat32Array writes a []float32 with fieldName.
	WriteFloat32Array(fieldName string, value []float32)

	// WriteFloat64Array writes a []float64 with fieldName.
	WriteFloat64Array(fieldName string, value []float64)

	// WriteStringArray writes a []string in UTF-8 format with fieldName.
	WriteStringArray(fieldName string, value []string)

	// WritePortableArray writes a []Portable with fieldName.
	WritePortableArray(fieldName string, value []Portable) error
}

PortableWriter provides a mean of writing portable fields to a binary in form of go primitives arrays of go primitives, nested portable fields and array of portable fields.

type PositionalDataOutput 

type PositionalDataOutput interface {
	// DataOutput provides serialization methods.
	DataOutput

	// PWriteByte writes a byte to a specific position.
	PWriteByte(position int32, v byte)

	// PWriteBool writes a bool to a specific position.
	PWriteBool(position int32, v bool)

	// PWriteUInt16 writes an uint16 to a specific position.
	PWriteUInt16(position int32, v uint16)

	// PWriteInt16 writes an int16 to a specific position.
	PWriteInt16(position int32, v int16)

	// PWriteInt32 writes an int32 to a specific position.
	PWriteInt32(position int32, v int32)

	// PWriteInt64 writes an int64 to a specific position.
	PWriteInt64(position int32, v int64)

	// PWriteFloat32 writes a float32 to a specific position.
	PWriteFloat32(position int32, v float32)

	// PWriteFloat64 writes a float64 to a specific position.
	PWriteFloat64(position int32, v float64)
}

PositionalDataOutput provides some serialization methods for a specific position.

type Serializer 

type Serializer interface {
	// ID returns id of serializer.
	ID() (id int32)

	// Read reads an object from ObjectDataInput.
	Read(input DataInput) (object interface{}, err error)

	// Write writes an object to ObjectDataOutput.
	Write(output DataOutput, object interface{}) (err error)
}

Serializer is base interface of serializers.

type VersionedPortable 

type VersionedPortable interface {
	Portable

	// Version returns version for this Portable struct.
	Version() (version int32)
}

VersionedPortable is an extension to Portable to support per class version instead of a global serialization version.

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