com.nutiteq.datasources.vector

Class OGRVectorDataSource

java.lang.Object

com.nutiteq.vectordatasources.AbstractVectorDataSource<com.nutiteq.geometry.Geometry>

com.nutiteq.datasources.vector.OGRVectorDataSource

All Implemented Interfaces:

com.nutiteq.vectordatasources.VectorDataSource<com.nutiteq.geometry.Geometry>

Direct Known Subclasses:

EditableOGRVectorDataSource

public abstract class OGRVectorDataSource
extends com.nutiteq.vectordatasources.AbstractVectorDataSource<com.nutiteq.geometry.Geometry>

Datasource for reading OGR file data sources. Instances need to define factory methods for creating style sets based on element metadata.

Author:

jaak

Nested Class Summary

Nested classes/interfaces inherited from interface com.nutiteq.vectordatasources.VectorDataSource

com.nutiteq.vectordatasources.VectorDataSource.OnChangeListener

Field Summary

Fields

Modifier and Type	Field and Description
protected OGRFileHelper	ogrHelper

Fields inherited from class com.nutiteq.vectordatasources.AbstractVectorDataSource

projection

Constructor Summary

Constructors

Constructor and Description
OGRVectorDataSource(com.nutiteq.projections.Projection proj, String fileName, String tableName) Open OGR datasource.
OGRVectorDataSource(com.nutiteq.projections.Projection proj, String fileName, String tableName, boolean update) Open OGR datasource.

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract com.nutiteq.ui.Label	createLabel(Map<String,String> userData)
protected abstract com.nutiteq.style.StyleSet<com.nutiteq.style.LineStyle>	createLineStyleSet(Map<String,String> userData, int zoom)
protected abstract com.nutiteq.style.StyleSet<com.nutiteq.style.PointStyle>	createPointStyleSet(Map<String,String> userData, int zoom)
protected abstract com.nutiteq.style.StyleSet<com.nutiteq.style.PolygonStyle>	createPolygonStyleSet(Map<String,String> userData, int zoom)
com.nutiteq.components.Envelope	getDataExtent()
Collection<com.nutiteq.geometry.Geometry>	loadElements(com.nutiteq.components.CullState cullState)
void	setMaxElements(int maxElements) Limit maximum objects returned by each query.

Methods inherited from class com.nutiteq.vectordatasources.AbstractVectorDataSource

addOnChangeListener, getProjection, notifyElementChanged, notifyElementsChanged, onElementChanged, removeOnChangeListener

Methods inherited from class java.lang.Object

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

Field Detail

ogrHelper

protected final OGRFileHelper ogrHelper

Constructor Detail

OGRVectorDataSource

public OGRVectorDataSource(com.nutiteq.projections.Projection proj,
                   String fileName,
                   String tableName)
                    throws IOException

Open OGR datasource. Datasource properties depend on particular data type, e.g. for Shapefile just give file name This sample tries to read whole layer, you probably need adjustments to optimize reading depending on data specifics

Parameters:

proj - layer projection. NB! data must be in the same projection

fileName - datasource name: file or connection string

tableName - table (OGR layer) name, needed for multi-layer datasets. If null, takes the first layer from dataset

Throws:

IOException - file not found or other problem opening OGR datasource

OGRVectorDataSource

public OGRVectorDataSource(com.nutiteq.projections.Projection proj,
                   String fileName,
                   String tableName,
                   boolean update)
                    throws IOException

Open OGR datasource. Datasource properties depend on particular data type, e.g. for Shapefile just give file name This sample tries to read whole layer, you probably need adjustments to optimize reading depending on data specifics

Parameters:

proj - layer projection. NB! data must be in the same projection

fileName - datasource name: file or connection string

tableName - table (OGR layer) name, needed for multi-layer datasets. If null, takes the first layer from dataset

update - if true, file will be opened in read-write mode. If false, file is only readable

Throws:

IOException - file not found or other problem opening OGR datasource

Method Detail

setMaxElements

public void setMaxElements(int maxElements)

Limit maximum objects returned by each query.

Parameters:

maxElements - maximum objects

getDataExtent

public com.nutiteq.components.Envelope getDataExtent()

loadElements

public Collection<com.nutiteq.geometry.Geometry> loadElements(com.nutiteq.components.CullState cullState)

createLabel

protected abstract com.nutiteq.ui.Label createLabel(Map<String,String> userData)

createPointStyleSet

protected abstract com.nutiteq.style.StyleSet<com.nutiteq.style.PointStyle> createPointStyleSet(Map<String,String> userData,
                                                                           int zoom)

createLineStyleSet

protected abstract com.nutiteq.style.StyleSet<com.nutiteq.style.LineStyle> createLineStyleSet(Map<String,String> userData,
                                                                         int zoom)

createPolygonStyleSet

protected abstract com.nutiteq.style.StyleSet<com.nutiteq.style.PolygonStyle> createPolygonStyleSet(Map<String,String> userData,
                                                                               int zoom)