ilog.views.maps.datasource
Class IlvPolylineSimplifierDataSource

java.lang.Object
  ilog.views.maps.datasource.IlvMapDataSource
      ilog.views.maps.datasource.IlvGraphicLayerDataSource
          ilog.views.maps.datasource.IlvPolylineSimplifierDataSource

All Implemented Interfaces:

IlvPersistentObject, IlvFeatureRenderer, IlvMapFeatureIterator, IlvMapReusableFeatureIterator

public class IlvPolylineSimplifierDataSource
extends IlvGraphicLayerDataSource

IlvPolylineSimplifierDataSource features a utility that simplifies polygons and polylines through the use of an IlvPolygonSimplifyingEngine.

This class is useful when the original data source is too detailed and you want to reduce the map size.

Since:

JViews 8.1

Field Summary

Fields inherited from class ilog.views.maps.datasource.IlvMapDataSource

renderer, usingGeodeticComputation

Constructor Summary

IlvPolylineSimplifierDataSource(IlvInputStream stream)
Creates a data source by reading its parameters from an input stream.

IlvPolylineSimplifierDataSource(IlvMapDataSource dataSource)
Creates an IlvPolylineSimplifierDataSource instance from an IlvMapDataSource object passed as a parameter.

Method Summary

boolean	isGeoreferenced() Returns false.
void	setSimplifyDistance(double distance) Sets the criterion distance used to simplify polylines.
void	start() Simplifies the specified collection of polylines.
void	write(IlvOutputStream stream) Writes an IlvPolylineSimplifierDataSource instance to an IlvOutputStream.

Methods inherited from class ilog.views.maps.datasource.IlvGraphicLayerDataSource

add, add, clear, dispose, get, getDefaultFeatureRenderer, getFeatureIterator, getLowerRightCorner, getMonitoringData, getNextFeature, getUpperLeftCorner, isPersistent, makeGraphic, remove, restart, setCoordinateSystem, setManager, setMonitoringData, size

Methods inherited from class ilog.views.maps.datasource.IlvMapDataSource

addDataSourceListener, callListeners, createInsertionLayer, getBackupDataSources, getCoordinateSystem, getDescription, getFeatureRenderer, getInsertionLayer, getManager, getMapLayer, getName, getNode, getValidExtentions, hasInsertionLayer, initBackupDataSource, initInsertionLayer, isAttachingAttributes, isSaveBackupDataSources, isSourceDataAvailable, isUsingGeodeticComputation, mapIntersects, removeDataSourceListener, reset, setAttachingAttributes, setDescription, setFeatureRenderer, setForceUsingBackupDataSource, setInsertionLayer, setName, setSaveBackupDataSources, setValidExtentions, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface ilog.views.maps.IlvMapFeatureIterator

getCoordinateSystem

Constructor Detail

IlvPolylineSimplifierDataSource

public IlvPolylineSimplifierDataSource(IlvMapDataSource dataSource)

Creates an IlvPolylineSimplifierDataSource instance from an IlvMapDataSource object passed as a parameter.

Parameters:

dataSource - The IlvMapDataSource producing polylines to simplify.

IlvPolylineSimplifierDataSource

public IlvPolylineSimplifierDataSource(IlvInputStream stream)
                                throws IlvReadFileException

Creates a data source by reading its parameters from an input stream.

Parameters:

stream - The stream to read from.

Throws:

IlvReadFileException - if there is a problem reading from stream.

Method Detail

write

public void write(IlvOutputStream stream)
           throws IOException

Writes an IlvPolylineSimplifierDataSource instance to an IlvOutputStream.

Specified by:

write in interface IlvPersistentObject

Specified by:

write in interface IlvFeatureRenderer

Overrides:

write in class IlvGraphicLayerDataSource

Parameters:

stream - The stream to write to.

Throws:

IOException - if there is a problem writing to stream.

See Also:

IlvFeatureRenderer.write(ilog.views.io.IlvOutputStream)

setSimplifyDistance

public void setSimplifyDistance(double distance)

Sets the criterion distance used to simplify polylines.

Parameters:

distance - The maximum distance in meters for the Douglas Peuker Algorithm.

start

public void start()
           throws Exception

Simplifies the specified collection of polylines. This simplification is done according to the SimplifyDistance criterion.

Overrides:

start in class IlvGraphicLayerDataSource

Throws:

Exception - when the initial source.

See Also:

setSimplifyDistance(double)

isGeoreferenced

public boolean isGeoreferenced()

Returns false.

Specified by:

isGeoreferenced in interface IlvMapFeatureIterator

Overrides:

isGeoreferenced in class IlvGraphicLayerDataSource

Returns:

This method always returns false.

See Also:

IlvMapFeatureIterator.isGeoreferenced()