ai.grakn.migration.json

Class JsonMigrator

java.lang.Object

ai.grakn.migration.base.AbstractMigrator

ai.grakn.migration.json.JsonMigrator

All Implemented Interfaces:

Migrator, AutoCloseable

public class JsonMigrator
extends AbstractMigrator

Migrator for migrating JSON data into Grakn instances

Field Summary

Fields inherited from class ai.grakn.migration.base.AbstractMigrator

BATCH_SIZE, queryBuilder

Constructor Summary

Constructors

Constructor and Description
JsonMigrator(String template, File jsonFileOrDir) Construct a JsonMigrator to migrate data in the given file or dir
JsonMigrator(String template, Reader reader) Construct a JsonMigrator to migrate data in given reader

Method Summary

Modifier and Type	Method and Description
void	close() Close the readers
java.util.stream.Stream<InsertQuery>	migrate() Migrate each of the given json objects as an insert query

Methods inherited from class ai.grakn.migration.base.AbstractMigrator

registerMacro, stream, template, validValue

Methods inherited from class java.lang.Object

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

Constructor Detail

JsonMigrator

public JsonMigrator(String template,
                    File jsonFileOrDir)

Construct a JsonMigrator to migrate data in the given file or dir

Parameters:

template - parametrized graql insert query

jsonFileOrDir - either a Json file or a directory containing Json files

JsonMigrator

public JsonMigrator(String template,
                    Reader reader)

Construct a JsonMigrator to migrate data in given reader

Parameters:

template - parametrized graql insert query

reader - reader over the data to be migrated

Method Detail

migrate

public java.util.stream.Stream<InsertQuery> migrate()

Migrate each of the given json objects as an insert query

Returns:

stream of parsed insert queries

close

public void close()
           throws Exception

Close the readers

Throws:

Exception