Package com.vaadin.flow.component.charts.export

Class SVGGenerator

java.lang.Object

com.vaadin.flow.component.charts.export.SVGGenerator

All Implemented Interfaces:

AutoCloseable

public class SVGGenerator
extends Object
implements AutoCloseable

Use instances of this class to generate SVG strings from chart Configuration instances. You must close the generator when you're done with it. You can use a try-with-resources block to close it automatically. You must have NodeJS installed for this to work.

CSS styling is not supported.

Example usage:

  Configuration configuration = new Configuration();
  // ...
  try (SVGGenerator generator = new SVGGenerator()) {
      String svg = generator.generate(configuration);
  }
  

Since:

21.0

Constructor Summary

Constructors

Constructor	Description
SVGGenerator()	Creates a new instance of SVGGenerator which allocates resources used to transform a Configuration object to an SVG string.

Method Summary

Modifier and Type	Method	Description
void	close()
String	generate(Configuration chartConfiguration)	Generate an SVG string that can be used to render a chart with data from a Configuration instance.
String	generate(Configuration chartConfiguration, ExportOptions exportOptions)	Generate an SVG string that can be used to render a chart with data from a Configuration instance.
boolean	isClosed()	Check if this generator is closed.

Methods inherited from class java.lang.Object

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

Constructor Details

SVGGenerator

public SVGGenerator()
             throws IOException

Creates a new instance of SVGGenerator which allocates resources used to transform a Configuration object to an SVG string.

You must close the generator when you're done using it. Use a try-with-resources block or call the close() method.

Throws:

IOException - if there's any issue allocating resources needed.

Method Details

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Throws:

IOException

generate

public String generate(Configuration chartConfiguration)
                throws IOException,
InterruptedException

Generate an SVG string that can be used to render a chart with data from a Configuration instance.

Parameters:

chartConfiguration - the Configuration with the chart's data.

Returns:

an SVG string resulting from the Configuration.

Throws:

NullPointerException - when passing a null configuration.

IllegalStateException - when called on a closed generator.

IOException - if anything happens using or allocating resources to virtually render the chart.

InterruptedException - if the rendering process gets interrupted.

See Also:

• generate(Configuration, ExportOptions)

generate

public String generate(Configuration chartConfiguration,
 ExportOptions exportOptions)
                throws IOException,
InterruptedException

Generate an SVG string that can be used to render a chart with data from a Configuration instance.

Parameters:

chartConfiguration - the Configuration with the chart's data.

exportOptions - optional exporting options to customize the result.

Returns:

an SVG string resulting from the Configuration, customized as per the ExportOptions.

Throws:

NullPointerException - when passing a null configuration.

IllegalStateException - when called on a closed generator.

IOException - if anything happens using or allocating resources to virtually render the chart.

InterruptedException - if the rendering process gets interrupted.

isClosed

public boolean isClosed()

Check if this generator is closed.

Returns:

true if the generator is closed, false otherwise.