ilog.views.maps.datasource
Class IlvHierarchicalDataSource.CriterionFilter

java.lang.Object
  ilog.views.maps.datasource.IlvHierarchicalDataSource.CriterionFilter

All Implemented Interfaces:

IlvPersistentObject

Direct Known Subclasses:

IlvHierarchicalDataSource.SingleAttributeFilter, IlvMIDMIFDataSource.MIDMIFFilter, IlvSDODataSource.SDOLayerFilter

Enclosing class:

IlvHierarchicalDataSource

public abstract static class IlvHierarchicalDataSource.CriterionFilter
extends Object
implements IlvPersistentObject

A value extractor for map features. A filter mainly has a getValue method that returns a value for a specified IlvMapFeature. For instance, it could return the value of a fixed attribute for all map features.

Since:

JViews 7.5

Constructor Summary

IlvHierarchicalDataSource.CriterionFilter()
Creates a new CriterionFilter.

Method Summary

abstract String	getCriterionDescription() Returns a description for this filter
abstract Object	getValue(IlvMapFeature feature) Returns a value for the specified map feature.

Methods inherited from class java.lang.Object

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

Methods inherited from interface ilog.views.io.IlvPersistentObject

write

Constructor Detail

IlvHierarchicalDataSource.CriterionFilter

public IlvHierarchicalDataSource.CriterionFilter()

Creates a new CriterionFilter.

Method Detail

getValue

public abstract Object getValue(IlvMapFeature feature)

Returns a value for the specified map feature. This value is used by the IlvHierarchicalDataSource to group map features of same value together into layers.

Parameters:

feature - the specified map feature.

Returns:

the value for the specified map feature.

getCriterionDescription

public abstract String getCriterionDescription()

Returns a description for this filter

Returns:

a string describing the filter