org.janusgraph.graphdb.database.serialize.attribute

Class JsonSerializer<T extends org.apache.tinkerpop.shaded.jackson.databind.JsonNode>

java.lang.Object

org.janusgraph.graphdb.database.serialize.attribute.JsonSerializer<T>

Type Parameters:

T - is the implementation of the JsonNode like ObjectNode or ArrayNode

All Implemented Interfaces:

AttributeSerializer<T>, OrderPreservingSerializer<T>

public class JsonSerializer<T extends org.apache.tinkerpop.shaded.jackson.databind.JsonNode>
extends Object
implements OrderPreservingSerializer<T>

Serializes implementation of JsonNode by using StringSerializer for JSON string serialization. Throws JsonNodeParseException if the string has a wrong JSON format.

Constructor Summary

Constructors

Constructor and Description
JsonSerializer(Class<T> jsonType)

Method Summary

Modifier and Type	Method and Description
T	convert(Object value) Converts the given (not-null) value to the expected data type V.
T	read(ScanBuffer buffer) Reads an attribute from the given ReadBuffer.
T	readByteOrder(ScanBuffer buffer) Reads an attribute from the given ReadBuffer assuming it was written in byte order.
void	verifyAttribute(T value) Verifies the given (not-null) attribute value is valid.
void	write(WriteBuffer buffer, T attribute) Writes the attribute value to the given WriteBuffer.
void	writeByteOrder(WriteBuffer buffer, T attribute) Writes the attribute value to the given WriteBuffer such that the byte order of the result is equal to the natural order of the attribute.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JsonSerializer

public JsonSerializer(Class<T> jsonType)

Method Detail

readByteOrder

public T readByteOrder(ScanBuffer buffer)

Description copied from interface: OrderPreservingSerializer

Reads an attribute from the given ReadBuffer assuming it was written in byte order.

It is expected that this read operation adjusts the position in the ReadBuffer to after the attribute value.

Specified by:

readByteOrder in interface OrderPreservingSerializer<T extends org.apache.tinkerpop.shaded.jackson.databind.JsonNode>

Parameters:

buffer - ReadBuffer to read attribute from

Returns:

Read attribute

writeByteOrder

public void writeByteOrder(WriteBuffer buffer,
                           T attribute)

Description copied from interface: OrderPreservingSerializer

Writes the attribute value to the given WriteBuffer such that the byte order of the result is equal to the natural order of the attribute.

It is expected that this write operation adjusts the position in the WriteBuffer to after the attribute value.

Specified by:

writeByteOrder in interface OrderPreservingSerializer<T extends org.apache.tinkerpop.shaded.jackson.databind.JsonNode>

Parameters:

buffer - WriteBuffer to write attribute to

attribute - Attribute to write to WriteBuffer

read

public T read(ScanBuffer buffer)

Description copied from interface: AttributeSerializer

Reads an attribute from the given ReadBuffer.

It is expected that this read operation adjusts the position in the ReadBuffer to after the attribute value.

Specified by:

read in interface AttributeSerializer<T extends org.apache.tinkerpop.shaded.jackson.databind.JsonNode>

Parameters:

buffer - ReadBuffer to read attribute from

Returns:

Read attribute

write

public void write(WriteBuffer buffer,
                  T attribute)

Description copied from interface: AttributeSerializer

Writes the attribute value to the given WriteBuffer.

It is expected that this write operation adjusts the position in the WriteBuffer to after the attribute value.

Specified by:

write in interface AttributeSerializer<T extends org.apache.tinkerpop.shaded.jackson.databind.JsonNode>

Parameters:

buffer - WriteBuffer to write attribute to

attribute - Attribute to write to WriteBuffer

verifyAttribute

public void verifyAttribute(T value)

Description copied from interface: AttributeSerializer

Verifies the given (not-null) attribute value is valid. Throws an IllegalArgumentException if the value is invalid, otherwise simply returns.

Specified by:

verifyAttribute in interface AttributeSerializer<T extends org.apache.tinkerpop.shaded.jackson.databind.JsonNode>

Parameters:

value - to verify

convert

public T convert(Object value)

Description copied from interface: AttributeSerializer

Converts the given (not-null) value to the expected data type V. The given object will NOT be of type V. Throws an IllegalArgumentException if it cannot be converted.

Specified by:

convert in interface AttributeSerializer<T extends org.apache.tinkerpop.shaded.jackson.databind.JsonNode>

Parameters:

value - to convert

Returns:

converted to expected data type