org.apache.tinkerpop.gremlin.structure.io

Interface Io<R extends GraphReader.ReaderBuilder,W extends GraphWriter.WriterBuilder,M extends Mapper.Builder>

public interface Io<R extends GraphReader.ReaderBuilder,W extends GraphWriter.WriterBuilder,M extends Mapper.Builder>

Ties together the core interfaces of an IO format: GraphReader, GraphWriter and Mapper. The Io.Builder of an Io instance is supplied to Graph.io(Io.Builder) and the Graph implementation can then chose to supply an IoRegistry to it before returning it. An Io implementation should use that IoRegistry to lookup custom serializers to use and register them to the internal Mapper (if the format has such capability).

Author:

Stephen Mallette (http://stephen.genoprime.com)

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	Io.Builder<I extends Io> Helps to construct an Io implementation and should be implemented by every such implementation as that class will be passed to Graph.io(Io.Builder) by the user.
static class	Io.Exceptions

Method Summary

Modifier and Type	Method and Description
M	mapper() Constructs a Mapper.Builder which is responsible for constructing the abstraction over different serialization methods.
R	reader() Creates a GraphReader.ReaderBuilder implementation .
void	readGraph(String file) Read a Graph from file using the default configuration of the reader() and its supplied mapper().
void	writeGraph(String file) Write a Graph to file using the default configuration of the writer() and its supplied mapper().
W	writer() Creates a GraphWriter.WriterBuilder implementation .

Method Detail

reader

R reader()

Creates a GraphReader.ReaderBuilder implementation . Implementers should call the mapper() function to feed its result to the builder. In this way, custom class serializers registered to the Mapper.Builder by Graph implementations will end up being used for the serialization process.

writer

W writer()

Creates a GraphWriter.WriterBuilder implementation . Implementers should call the mapper() function to feed its result to the builder. In this way, custom class serializers registered to the Mapper.Builder by Graph implementations will end up being used for the serialization process.

mapper

M mapper()

Constructs a Mapper.Builder which is responsible for constructing the abstraction over different serialization methods. Implementations should set defaults as required, but most importantly need to make the appropriate call to Mapper.Builder.addRegistry(IoRegistry) which will provide the builder with any required custom serializers of the Graph.

writeGraph

void writeGraph(String file)
         throws IOException

Write a Graph to file using the default configuration of the writer() and its supplied mapper().

Throws:

IOException

readGraph

void readGraph(String file)
        throws IOException

Read a Graph from file using the default configuration of the reader() and its supplied mapper().

Throws:

IOException