Package com.pushtechnology.diffusion.datatype.json

Interface JSONDataType

All Superinterfaces:

DataType<JSON>

public interface JSONDataType
extends DataType<JSON>

JSON data type.

For efficiency, the JSON value is serialized in binary form following the CBOR specification.

The implementation provides support for binary deltas.

Since:

5.7

Author:

DiffusionData Limited

See Also:

• DataTypes.json()

Method Summary

Modifier and Type	Method	Description
DeltaType<JSON,BinaryDelta>	binaryDeltaType()	Returns support for binary deltas.
JSON	fromJsonString(String json)	Parse a JSON string.
JSON	readValue(byte[] bytes)	Parse a value from CBOR-format binary.
JSON	readValue(byte[] bytes, int offset, int length)	Parse a value from CBOR-format binary.
JSON	readValue(Bytes bytes)	Parse a value from CBOR-format binary.

Methods inherited from interface com.pushtechnology.diffusion.datatype.DataType

canReadAs, deltaType, deltaType, getTypeName, readAs, readAs, readAs, serializedBinaryDeltaType, toBytes, validate, validate, writeValue

Method Details

binaryDeltaType

DeltaType<JSON,BinaryDelta> binaryDeltaType()

Returns support for binary deltas.

Equivalent to calling deltaType(BinaryDelta.class).

Specified by:

binaryDeltaType in interface DataType<JSON>

Returns:

the delta type, or null if none

fromJsonString

JSON fromJsonString(String json)
             throws InvalidDataException

Parse a JSON string.

Precision for numeric types is lost in the translation to the internal CBOR binary form and non-significant white space is not preserved. It is not guaranteed that fromJsonString(json).toJsonString() equals json.

Throws:

InvalidDataException - if json does not represent a single JSON value

readValue

JSON readValue(byte[] bytes,
 int offset,
 int length)
        throws IndexOutOfBoundsException

Parse a value from CBOR-format binary.

JSON instances defer parsing of binary data until required so this method does not throw InvalidDataException. If the data is not valid, an InvalidDataException may be thrown when a JSON method is called.

Specified by:

readValue in interface DataType<JSON>

Parameters:

bytes - the binary data. The implementation re-uses the array to avoid copying. The caller must ensure the array is not modified.

offset - start of the data within bytes

length - length of the data within bytes

Throws:

IndexOutOfBoundsException - if either offset or length is negative, or offset + length > bytes.length

See Also:

• DataType.validate(V)

readValue

JSON readValue(byte[] bytes)

Parse a value from CBOR-format binary. Equivalent to readValue(in, 0, in.length).

Specified by:

readValue in interface DataType<JSON>

Parameters:

bytes - the binary data. The implementation re-uses the array to avoid copying. The caller must ensure the array is not modified.

readValue

JSON readValue(Bytes bytes)

Parse a value from CBOR-format binary. Equivalent to readValue(bytes.toByteArray()).

Specified by:

readValue in interface DataType<JSON>

Parameters:

bytes - the binary data