org.openstreetmap.josm.data.osm.visitor
Class MergeSourceBuildingVisitor

java.lang.Object
  org.openstreetmap.josm.data.osm.visitor.AbstractVisitor
      org.openstreetmap.josm.data.osm.visitor.MergeSourceBuildingVisitor

All Implemented Interfaces:

Visitor

public class MergeSourceBuildingVisitor
extends AbstractVisitor

MergeSourceBuildingVisitor helps to build the "hull" of a collection of OsmPrimitives which shall be merged into another layer. The "hull" is slightly bigger than the original collection. It includes, for instance the nodes of a way in the original collection even though these nodes might not be present explicitly in the original collection. The "hull" also includes incomplete OsmPrimitives which are referred to by relations in the original collection. And it turns OsmPrimitive referred to by Relations in the original collection into incomplete OsmPrimitives in the "hull", if they are not themselves present in the original collection.

Field Summary

private DataSet	hull
private java.util.HashMap<OsmPrimitive,PrimitiveData>	mappedPrimitives
private DataSet	selectionBase

Constructor Summary

MergeSourceBuildingVisitor(DataSet selectionBase)
Creates the visitor.

Method Summary

DataSet	build()
protected void	buildHull()
protected boolean	isAlreadyRemembered(OsmPrimitive primitive)
protected boolean	isInSelectionBase(OsmPrimitive primitive)
protected void	rememberIncomplete(OsmPrimitive primitive)
protected void	rememberNode(Node n) Remebers a node in the "hull"
protected void	rememberRelation(Relation r) Remembers a relation in the hull
protected void	rememberRelationPartial(Relation r)
protected void	rememberWay(Way w) remembers a way in the hull
void	visit(Node n) Visiting call for points.
void	visit(Relation r) Visiting call for relations.
void	visit(Way w) Visiting call for lines.

Methods inherited from class org.openstreetmap.josm.data.osm.visitor.AbstractVisitor

visit

Methods inherited from class java.lang.Object

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

Field Detail

selectionBase

private DataSet selectionBase

hull

private DataSet hull

mappedPrimitives

private java.util.HashMap<OsmPrimitive,PrimitiveData> mappedPrimitives

Constructor Detail

MergeSourceBuildingVisitor

public MergeSourceBuildingVisitor(DataSet selectionBase)
                           throws java.lang.IllegalArgumentException

Creates the visitor. The visitor starts to build the "hull" from the currently selected primitives in the dataset selectionBase, i.e. from DataSet.getSelected().

Parameters:

selectionBase - the dataset. Must not be null.

Throws:

java.lang.IllegalArgumentException - thrown if selectionBase is null

Method Detail

isInSelectionBase

protected boolean isInSelectionBase(OsmPrimitive primitive)

isAlreadyRemembered

protected boolean isAlreadyRemembered(OsmPrimitive primitive)

rememberNode

protected void rememberNode(Node n)

Remebers a node in the "hull"

Parameters:

n - the node

rememberWay

protected void rememberWay(Way w)

remembers a way in the hull

Parameters:

w - the way

rememberRelation

protected void rememberRelation(Relation r)

Remembers a relation in the hull

Parameters:

r - the relation

rememberRelationPartial

protected void rememberRelationPartial(Relation r)

rememberIncomplete

protected void rememberIncomplete(OsmPrimitive primitive)

visit

public void visit(Node n)

Description copied from interface: Visitor

Visiting call for points.

Parameters:

n - The node to inspect.

visit

public void visit(Way w)

Description copied from interface: Visitor

Visiting call for lines.

Parameters:

w - The way to inspect.

visit

public void visit(Relation r)

Description copied from interface: Visitor

Visiting call for relations.

Parameters:

r - The relation to inspect.

buildHull

protected void buildHull()

build

public DataSet build()