com.tinkerpop.pipes.transform

Class MemoizePipe<S,E>

java.lang.Object

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

com.tinkerpop.pipes.util.AbstractMetaPipe<S,E>

com.tinkerpop.pipes.transform.MemoizePipe<S,E>

All Implemented Interfaces:

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

public class MemoizePipe<S,E>
extends AbstractMetaPipe<S,E>
implements MetaPipe, TransformPipe<S,E>

Author:

Marko A. Rodriguez (http://markorodriguez.com)

Nested Class Summary

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

TransformPipe.Order

Field Summary

Fields

Modifier and Type	Field and Description
protected Iterator<E>	currentIterator
protected SingleExpandableIterator<S>	expando
protected Map<S,List<E>>	map
protected Pipe<S,E>	pipe

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
MemoizePipe(Pipe<S,E> pipe)
MemoizePipe(Pipe<S,E> pipe, Map<S,List<E>> map)

Method Summary

Methods

Modifier and Type	Method and Description
List<Pipe>	getPipes()
E	processNextStart()
void	reset() A pipe may maintain state.
String	toString()

Methods inherited from class com.tinkerpop.pipes.util.AbstractMetaPipe

enablePath

Methods inherited from class com.tinkerpop.pipes.AbstractPipe

getCurrentPath, getPathToHere, hasNext, iterator, next, remove, setStarts, setStarts, setStarts

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, getCurrentPath, setStarts, setStarts

Methods inherited from interface java.util.Iterator

hasNext, next, remove

Methods inherited from interface java.lang.Iterable

iterator

Field Detail

pipe

protected Pipe<S,E> pipe

map

protected Map<S,List<E>> map

currentIterator

protected Iterator<E> currentIterator

expando

protected final SingleExpandableIterator<S> expando

Constructor Detail

MemoizePipe

public MemoizePipe(Pipe<S,E> pipe)

MemoizePipe

public MemoizePipe(Pipe<S,E> pipe,
           Map<S,List<E>> map)

Method Detail

processNextStart

public E processNextStart()

Specified by:

processNextStart in class AbstractPipe<S,E>

getPipes

public List<Pipe> getPipes()

Specified by:

getPipes in interface MetaPipe

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,E>

Overrides:

reset in class AbstractMetaPipe<S,E>

toString

public String toString()

Overrides:

toString in class AbstractPipe<S,E>