ilog.views.maps.defense.datasource

Class IlvVMAPDataSource

java.lang.Object

ilog.views.maps.datasource.IlvMapDataSource

ilog.views.maps.datasource.IlvHierarchicalDataSource

ilog.views.maps.tiling.IlvTilableDataSource

ilog.views.maps.defense.datasource.IlvVMAPDataSource

All Implemented Interfaces:

IlvPersistentObject

public class IlvVMAPDataSource
extends IlvTilableDataSource

IlvVMAPDataSource is a data source used to read a VMAP database.

Since:

JViews 7.0

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	IlvVMAPDataSource.FACCFilter A specialized criterion filter that returns the value of the FACC attribute of a map feature.

Nested classes/interfaces inherited from class ilog.views.maps.datasource.IlvHierarchicalDataSource

IlvHierarchicalDataSource.CriterionFilter, IlvHierarchicalDataSource.SingleAttributeFilter

Field Summary

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

featureIterator, filename, nameMap, styleMap

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

renderer, usingGeodeticComputation

Constructor Summary

Constructors

Constructor and Description
IlvVMAPDataSource(IlvInputStream stream) Constructs an IlvVMAPDataSource instance from the specified input stream.
IlvVMAPDataSource(String filename) Constructs an IlvVMAPDataSource instance from the specified filename (the root folder of the VMAP database).

Method Summary

Modifier and Type	Method and Description
protected IlvMapRegionOfInterestIterator	createTiledIterator(IlvMapLayer layer) Creates an iterator that will iterate through the map features for a specific area of interest.
protected void	createTiledLayers() Creates all the possible map layers that may be needed when load on demand occurs in the data source insertion layer.
IlvMapReusableFeatureIterator	getFeatureIterator() Retrieves the feature iterator used by this data source.
protected boolean	isSourceDataAvailable() Checks whether the source data this IlvMapDataSource is based on is available (file, database connection, url...).
void	setAreaOfinterest(double lonMin, double latMin, double lonMax, double latMax) Sets the area outside of which data will not be fetched.
void	setFaccCodeList(String[] faccCodes) Sets the list of accepted FACC codes.
void	write(IlvOutputStream stream) Writes this IlvVMAPDataSource instance to an IlvOutputStream.

Methods inherited from class ilog.views.maps.tiling.IlvTilableDataSource

createGenericTiles, getColumnCount, getLatMax, getLatMin, getLonMax, getLonMin, getRowCount, isMultiThreaded, reset, setMultiThreaded, setTilingParameters, setupTiledLoaders, start, useTiling

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

addCriterionFilter, addLayer, createFeatureRenderer, createInsertionLayer, createStyle, getCriterionFilters, getFeatureRenderer, getFeatureRenderer, getKey, getMapLayer, getStyle, isAcceptNullValues, readInfo, removeAllCriterionFilters, removeCriterionFilter, setAcceptNullValues, setupLayer

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

addDataSourceListener, callListeners, getBackupDataSources, getCoordinateSystem, getDescription, getInsertionLayer, getManager, getName, getNode, getValidExtentions, hasInsertionLayer, initBackupDataSource, initInsertionLayer, isAttachingAttributes, isGrapherMode, isSaveBackupDataSources, isUsingBackupDataSource, isUsingGeodeticComputation, mapIntersects, removeDataSourceListener, setAttachingAttributes, setCoordinateSystem, setDescription, setFeatureRenderer, setForceUsingBackupDataSource, setGrapherMode, setInsertionLayer, setManager, setName, setSaveBackupDataSources, setValidExtentions, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

IlvVMAPDataSource

public IlvVMAPDataSource(String filename)
                  throws MalformedURLException

Constructs an IlvVMAPDataSource instance from the specified filename (the root folder of the VMAP database).

Parameters:

filename - The name of the tiger file to read.

Throws:

MalformedURLException - if the path cannot be parsed as an URL.

IlvVMAPDataSource

public IlvVMAPDataSource(IlvInputStream stream)
                  throws IlvReadFileException

Constructs an IlvVMAPDataSource instance from the specified input stream.

Parameters:

stream - The IlvInputStream to read from.

Throws:

IlvReadFileException - if there is a problem reading from stream.

Method Detail

setAreaOfinterest

public void setAreaOfinterest(double lonMin,
                              double latMin,
                              double lonMax,
                              double latMax)

Sets the area outside of which data will not be fetched. Overridden from the superclass to properly set the region on the underlying VMAP reader.

Overrides:

setAreaOfinterest in class IlvTilableDataSource

Parameters:

lonMin - The minimum longitude of the area of interest.

latMin - The minimum latitude of the area of interest.

lonMax - The maximum longitude of the area of interest.

latMax - The maximum latitude of the area of interest.

getFeatureIterator

public IlvMapReusableFeatureIterator getFeatureIterator()

Retrieves the feature iterator used by this data source.

Overrides:

getFeatureIterator in class IlvHierarchicalDataSource

Returns:

The feature iterator.

createTiledLayers

protected void createTiledLayers()

Creates all the possible map layers that may be needed when load on demand occurs in the data source insertion layer.

Specified by:

createTiledLayers in class IlvTilableDataSource

See Also:

IlvTilableDataSource.createTiledLayers()

setFaccCodeList

public void setFaccCodeList(String[] faccCodes)

Sets the list of accepted FACC codes.

Parameters:

faccCodes - An array of accepted codes.

write

public void write(IlvOutputStream stream)
           throws IOException

Writes this IlvVMAPDataSource instance to an IlvOutputStream.

Specified by:

write in interface IlvPersistentObject

Overrides:

write in class IlvTilableDataSource

Parameters:

stream - The stream to write to.

Throws:

IOException - if there is a problem writing to stream.

createTiledIterator

protected IlvMapRegionOfInterestIterator createTiledIterator(IlvMapLayer layer)
                                                      throws IOException

Creates an iterator that will iterate through the map features for a specific area of interest.

Specified by:

createTiledIterator in class IlvTilableDataSource

Parameters:

layer - The layer to create objects for.

Returns:

The feature iterator.

Throws:

IOException

See Also:

IlvTilableDataSource.createTiledIterator(ilog.views.maps.beans.IlvMapLayer)

isSourceDataAvailable

protected boolean isSourceDataAvailable()

Checks whether the source data this IlvMapDataSource is based on is available (file, database connection, url...). A .ivl, JViews Maps file keeps references to the original sources the map was built from. It can happen that these sources are not available when opening the map, for example, when the map is transferred to another machine. This method checks that availability. In the case where these sources are not available, all operations that need them are performed from the data embedded in the map, but there is a risk of loosing information (when reprojecting for example). This method should be overridden by subclasses.

Overrides:

isSourceDataAvailable in class IlvMapDataSource

Returns:

Returns true, if the original source data is available.