com.tinkerpop.pipes.transform

Class ShufflePipe<S>

java.lang.Object

com.tinkerpop.pipes.AbstractPipe<S,S>

com.tinkerpop.pipes.transform.ShufflePipe<S>

All Implemented Interfaces:

Pipe<S,S>, TransformPipe<S,S>, Iterable<S>, Iterator<S>

public class ShufflePipe<S>
extends AbstractPipe<S,S>
implements TransformPipe<S,S>

The ShufflePipe emits all the objects up to this step as an ArrayList then randomizes the order of the items in the list.

Author:

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

Nested Class Summary

Nested classes/interfaces inherited from interface com.tinkerpop.pipes.transform.TransformPipe

TransformPipe.Order

Field Summary

Fields inherited from class com.tinkerpop.pipes.AbstractPipe

currentEnd, pathEnabled, starts

Fields inherited from interface com.tinkerpop.pipes.Pipe

NO_PATH_MESSAGE

Constructor Summary

Constructors

Constructor and Description
ShufflePipe()

Method Summary

Methods

Modifier and Type	Method and Description
protected List<S>	gather()
List	getCurrentPath() Returns the transformation path to arrive at the current object of the pipe.
protected S	processNextStart()
void	reset() A pipe may maintain state.

Methods inherited from class com.tinkerpop.pipes.AbstractPipe

enablePath, getPathToHere, hasNext, iterator, next, remove, setStarts, setStarts, setStarts, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.tinkerpop.pipes.Pipe

enablePath, setStarts, setStarts

Methods inherited from interface java.util.Iterator

hasNext, next, remove

Methods inherited from interface java.lang.Iterable

iterator

Constructor Detail

ShufflePipe

public ShufflePipe()

Method Detail

getCurrentPath

public List getCurrentPath()

Description copied from interface: Pipe

Returns the transformation path to arrive at the current object of the pipe.

Specified by:

getCurrentPath in interface Pipe<S,S>

Overrides:

getCurrentPath in class AbstractPipe<S,S>

Returns:

a List of all of the objects traversed for the current iterator position of the pipe.

processNextStart

protected S processNextStart()

Specified by:

processNextStart in class AbstractPipe<S,S>

gather

protected List<S> gather()

reset

public void reset()

Description copied from interface: Pipe

A pipe may maintain state. Reset is used to remove state. The general use case for reset() is to reuse a pipe in another computation without having to create a new Pipe object. An implementation of this method should be recursive whereby the starts (if a Pipe) should have this method called on it.

Specified by:

reset in interface Pipe<S,S>

Overrides:

reset in class AbstractPipe<S,S>