ilog.views.maps.datasource

Interface IlvPolylineMergerDataSource.IlvGraphicIdentifier

Enclosing class:

IlvPolylineMergerDataSource

public static interface IlvPolylineMergerDataSource.IlvGraphicIdentifier

This interface compares collections of features that are to be merged as a single polyline. If the interface finds the same java.lang.Object as the identifier for the two specified IlvGraphic, the IlvPolylineMergerDataSource assumes that these two IlvGraphic can be merged together as a single polyline if their extremities are close to one another.

Example:

 // Create an object that implements IlvPolylineMergerDataSource.IlvGraphicIdentifier 
 // For instance, the identifier returns the value of the field "STREETNAME" if any
 IlvPolylineMergerDataSource.IlvGraphicIdentifier identifier = new
 IlvPolylineMergerDataSource.IlvGraphicIdentifier() { 
     public String getIdentifierPropertyName() { return "STREETNAME"; }
     public Object getIdentifier(IlvGraphic component) {
       if (component != null) {
         IlvAttributeProperty properties = (IlvAttributeProperty) component.getNamedProperty(IlvAttributeProperty.NAME);
         if (properties  instanceof IlvFeatureAttributeProperty) {
           try {
             return ((IlvFeatureAttributeProperty)properties).getAttribute(getIdentifierPropertyName());
           } catch (IllegalArgumentException e){
                // if property does not exist    
           }
         }
       }
       return null;
     }
 IlvMapDataSource newSource=new IlvPolylineMergerDataSource(oldSource,identifier);
 IlvMapDataSourceModel dsm = IlvMapDataSourceProperty.getMapDataSourceModel(manager);
 dsm.addChild(reader);

 

Since:

JViews 7.5

Method Summary

Modifier and Type	Method and Description
Object	getIdentifier(IlvGraphic graphic) Identifies this
String	getIdentifierPropertyName() Returns the property name (to reintroduce into the merged object)

Method Detail

getIdentifier

Object getIdentifier(IlvGraphic graphic)

Identifies this

Parameters:

graphic - The object to identify.

Returns:

An object identifying this graphic for the purpose of merge comparison.

getIdentifierPropertyName

String getIdentifierPropertyName()

Returns the property name (to reintroduce into the merged object)

Returns:

The property name (to reintroduce into the merged object).