org.apache.tinkerpop.gremlin

Class AbstractFileGraphProvider

java.lang.Object

org.apache.tinkerpop.gremlin.AbstractGraphProvider

org.apache.tinkerpop.gremlin.AbstractFileGraphProvider

All Implemented Interfaces:

GraphProvider

public abstract class AbstractFileGraphProvider
extends AbstractGraphProvider

A base GraphProvider that is typically for use with Hadoop-based graphs as it enables access to the various resource data files that are used in the tests.

Author:

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

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.tinkerpop.gremlin.GraphProvider

GraphProvider.Descriptor, GraphProvider.TestListener

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	graphSONInput
protected static Random	RANDOM

Fields inherited from interface org.apache.tinkerpop.gremlin.GraphProvider

CORE_IMPLEMENTATIONS

Constructor Summary

Constructors

Constructor and Description
AbstractFileGraphProvider()

Method Summary

Modifier and Type	Method and Description
void	clear(Graph graph, org.apache.commons.configuration2.Configuration configuration) Clears a Graph of all data and settings.
protected String	getInputLocation(Graph g, LoadGraphWith.GraphData graphData)

Methods inherited from class org.apache.tinkerpop.gremlin.AbstractGraphProvider

cleanParameters, deleteDirectory, getBaseConfiguration, loadGraphData, makeTestDirectory, newGraphConfiguration, readIntoGraph

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.tinkerpop.gremlin.GraphProvider

clear, convertId, convertLabel, getGraphComputer, getImplementations, getStaticFeatures, getTestListener, getWorkingDirectory, newGraphConfiguration, openTestGraph, standardGraphConfiguration, standardTestGraph, traversal, traversal

Field Detail

RANDOM

protected static final Random RANDOM

graphSONInput

protected boolean graphSONInput

Constructor Detail

AbstractFileGraphProvider

public AbstractFileGraphProvider()

Method Detail

clear

public void clear(Graph graph,
                  org.apache.commons.configuration2.Configuration configuration)
           throws Exception

Description copied from interface: GraphProvider

Clears a Graph of all data and settings. Implementations will have different ways of handling this. It is typically expected that Graph.close() will be called and open transactions will be closed. For a brute force approach, implementers can simply delete data directories provided in the configuration. Implementers may choose a more elegant approach if it exists.

Implementations should be able to accept an argument of null for the Graph, in which case the only action that can be performed is a clear given the configuration. The method will typically be called this way as clean up task on setup to ensure that a persisted graph has a clear space to create a test graph.

Implementations should be able to accept an argument of null for the Configuration as well, and a proper handling is needed. Otherwise, a NullPointerException may be thrown.

Calls to this method may occur multiple times for a specific test. Develop this method to be idempotent.

Throws:

Exception

getInputLocation

protected String getInputLocation(Graph g,
                                  LoadGraphWith.GraphData graphData)