org.onebusaway.gtfs_transformer.factory
Class EntityRetentionGraph

java.lang.Object
  org.onebusaway.gtfs_transformer.factory.EntityRetentionGraph

public class EntityRetentionGraph
extends Object

We have the concept of retaining up and retaining down. Retain up: retain things that depend on the target object Retain down: retain things that the target object depends on Usually, we start by retaining some object, which starts as series of "retain up" operations to grab everything that depends on that object. As each object is retained up, it typically at this point also starts a subsequent chain of retain down operations, so that the dependencies of that object are retained as well.

Author:

bdferris

Constructor Summary

EntityRetentionGraph(GtfsRelationalDao dao)

Method Summary

int	getSize()
boolean	isRetained(Object object)
void	retain(Object object, boolean retainUp) Retain up: retain things that depend on the target object For example, if you retain up on a Route, we would also retain up on the Trip objects depending on this route Retain down: retain things that the target object depends on For example, if you retain down on a Route, we would also retain down on the route's Agency.
void	retainDown(Object object) Retain down: retain things that the target object depends on For example, if you retain down on a Route, we would also retain down on the route's Agency.
void	retainUp(Object object) Retain up: retain things that depend on the target object For example, if you retain up on a Route, we would also retain up on the Trip objects depending on this route
void	setRetainAllStopTimesForTrip(boolean retainAllStopTimesForTrip)
void	setRetainBlocks(boolean retainBlocks)

Methods inherited from class java.lang.Object

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

Constructor Detail

EntityRetentionGraph

public EntityRetentionGraph(GtfsRelationalDao dao)

Method Detail

setRetainBlocks

public void setRetainBlocks(boolean retainBlocks)

setRetainAllStopTimesForTrip

public void setRetainAllStopTimesForTrip(boolean retainAllStopTimesForTrip)

retainUp

public void retainUp(Object object)

Retain up: retain things that depend on the target object For example, if you retain up on a Route, we would also retain up on the Trip objects depending on this route

Parameters:

object -

retainDown

public void retainDown(Object object)

Retain down: retain things that the target object depends on For example, if you retain down on a Route, we would also retain down on the route's Agency.

Parameters:

object -

retain

public void retain(Object object,
                   boolean retainUp)

Retain up: retain things that depend on the target object For example, if you retain up on a Route, we would also retain up on the Trip objects depending on this route Retain down: retain things that the target object depends on For example, if you retain down on a Route, we would also retain down on the route's Agency.

Parameters:

object -

isRetained

public boolean isRetained(Object object)

getSize

public int getSize()