com.esri.core.renderer
Class ClassBreaksRenderer

java.lang.Object
  com.esri.core.renderer.ClassBreaksRenderer

All Implemented Interfaces:

Renderer<Graphic>, Serializable

public class ClassBreaksRenderer
extends Object
implements Renderer<Graphic>

A class breaks renderer symbolizes each graphic based on the value of some numeric attribute. Graphics with similar values for the attribute get the same symbol. The "breaks" define the values at which the symbology changes.Each break has a value range determined by its maximum value and implicit minimum value.

For example, suppose you have a "buildings" layer with an attribute that defines the building age. You want to symbolize buildings constructed since the year 2000 in green, buildings constructed between 1980 and 2000 in yellow, and buildings built before 1980 with red. This would be a good scenario for a class breaks renderer.

See Also:

Serialized Form

Field Summary

static String

TYPE

Constructor Summary

ClassBreaksRenderer()

ClassBreaksRenderer(org.codehaus.jackson.JsonNode node)
Instantiates ClassBreaksRenderer from a Json node object

Method Summary

boolean	addClassBreak(ClassBreak classbreak) Adds a class break.
TreeMap<Double,ClassBreak>	getClassBreakInfos() Returns a TreeMap object in which class break's maximum value maps to class break.
String	getField() Gets the attribute field used by renderer to match values.
double	getMinValue() Gets the minimum value.
Symbol	getSymbol(Graphic graphic) Returns the symbol of the class break the graphic provided belongs to.
boolean	removeClassBreak(ClassBreak classbreak) Removes a class break.
void	setClassBreakInfos(TreeMap<Double,ClassBreak> classBreakInfos) Sets class break information map.
void	setField(String field) Sets the attribute field used by renderer to match values.
void	setMinValue(double minValue) Sets minimum value
String	toJson() Converts into a JSON string.

Methods inherited from class java.lang.Object

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

Field Detail

TYPE

public static final String TYPE

See Also:

Constant Field Values

Constructor Detail

ClassBreaksRenderer

public ClassBreaksRenderer()

ClassBreaksRenderer

public ClassBreaksRenderer(org.codehaus.jackson.JsonNode node)
                    throws Exception

Instantiates ClassBreaksRenderer from a Json node object

Throws:

Exception

Method Detail

getSymbol

public Symbol getSymbol(Graphic graphic)

Returns the symbol of the class break the graphic provided belongs to.

Specified by:

getSymbol in interface Renderer<Graphic>

Parameters:

graphic - the graphic to be symbolized

Returns:

the symbol based on the properties of the graphic.

getField

public String getField()

Gets the attribute field used by renderer to match values.

Returns:

the field.

setField

public void setField(String field)

Sets the attribute field used by renderer to match values.

Parameters:

field - the field to set

getMinValue

public double getMinValue()

Gets the minimum value.

Returns:

the minimum value.

setMinValue

public void setMinValue(double minValue)

Sets minimum value

Parameters:

minValue - the minimum value to set

getClassBreakInfos

public TreeMap<Double,ClassBreak> getClassBreakInfos()

Returns a TreeMap object in which class break's maximum value maps to class break.

Returns:

the class breaks information map.

setClassBreakInfos

public void setClassBreakInfos(TreeMap<Double,ClassBreak> classBreakInfos)

Sets class break information map.

Parameters:

classBreakInfos - a TreeMap object in which class break's maximum value maps to class break.

addClassBreak

public boolean addClassBreak(ClassBreak classbreak)

Adds a class break.

Parameters:

classbreak - a class break.

removeClassBreak

public boolean removeClassBreak(ClassBreak classbreak)

Removes a class break.

Parameters:

classbreak - a class break.

Returns:

true if the class break is removed successfully.

toJson

public String toJson()
              throws Exception

Converts into a JSON string.

Specified by:

toJson in interface Renderer<Graphic>

Returns:

a JSON string.

Throws:

Exception