Interface IGenerator

All Known Implementing Classes:
Generator

public interface IGenerator
Provides an entry point into building a chart for a given model. It is implemented as a singleton and does not maintain any state information hence allowing multi-threaded requests for a single generator instance.
  • Method Details

    • prepare

      RunTimeContext prepare(Chart model, IExternalContext externalContext, IScriptClassLoader iscl, com.ibm.icu.util.ULocale locale) throws ChartException
      Since v2, it must be called before build( ), and should only be called once per design model.
      Parameters:
      model - Chart design model
      externalContext - External Context
      locale - Locale
      Returns:
      a runtime context used by build( )
      Throws:
      ChartException
      Since:
      2.1
    • bindData

      void bindData(ResultSet resultSet, Chart chart, RunTimeContext rtc) throws ChartException
      Binds a sql Resuset to a chart model. This is based on the assumption the column names of the resultset match exactly the data query definitions and other expressions set inside the chart model.
      Parameters:
      resultSet - A sql resultset that contains the data. The following methods of the interface need to be implemented: first(), next(), getObject(String), close()
      chart - The chart model to bind the data to
      rtc - The runtime context
      Throws:
      ChartException
      Since:
      2.0
    • bindData

      void bindData(IDataRowExpressionEvaluator expressionEvaluator, Chart chart, RunTimeContext rtc) throws ChartException
      Binds data to the chart model using a row expression evaluator. The evaluator provides the ability to evaluate the expressions set in the chart on a row context.
      Parameters:
      expressionEvaluator - The data row expression evaluator implementation
      chart - The chart model
      rtc - The runtime context
      Throws:
      ChartException
      Since:
      2.0
    • bindData

      void bindData(IDataRowExpressionEvaluator expressionEvaluator, IActionEvaluator iae, Chart chart, RunTimeContext rtc) throws ChartException
      Binds data to the chart model using a row expression evaluator. The evaluator provides the ability to evaluate the expressions set in the chart on a row context.If the given IActionEvaluator is not null, then it will also search available expressions within the action and bind it as the user dataSets.
      Parameters:
      expressionEvaluator - The data row expression evaluator implementation
      iae - An IActionEvaluator instance.
      chart - The chart model
      rtc - The runtime context
      Throws:
      ChartException
      Since:
      2.0
    • build

      GeneratedChartState build(IDisplayServer ids, Chart cmDesignTime, Bounds bo, IExternalContext externalContext, RunTimeContext rtc) throws ChartException
      Builds and computes preferred sizes of various chart components offscreen using the provided display server.
      Parameters:
      ids - A display server using which the chart may be built.
      cmDesignTime - The design time chart model (bound to a dataset).
      externalContext - An external context object.
      bo - The bounds associated with the chart being built.
      rtc - Encapsulates the runtime environment for the build process.
      Returns:
      An instance of a generated chart state that encapsulates built chart information that may be subsequently rendered.
      Throws:
      ChartException
    • build

      GeneratedChartState build(IDisplayServer ids, Chart cmDesignTime, Bounds bo, IExternalContext externalContext, RunTimeContext rtc, org.eclipse.birt.chart.style.IStyleProcessor externalProcessor) throws ChartException
      Builds and computes preferred sizes of various chart components offscreen using the provided display server.
      Parameters:
      ids - A display server using which the chart may be built.
      cmDesignTime - The design time chart model (bound to a dataset).
      externalContext - An external context object.
      bo - The bounds associated with the chart being built.
      rtc - Encapsulates the runtime environment for the build process.
      externalProcessor - An external style processor. If it's null, an implicit processor will be used.
      Returns:
      An instance of a generated chart state that encapsulates built chart information that may be subsequently rendered.
      Throws:
      ChartException
    • render

      void render(IDeviceRenderer idr, GeneratedChartState gcs) throws ChartException
      Draws a previously built chart using the specified device renderer into a target output device.
      Parameters:
      idr - A device renderer that determines the target context on which the chart will be rendered.
      gcs - A previously built chart that needs to be rendered.
      Throws:
      ChartException
    • refresh

      void refresh(GeneratedChartState gcs) throws ChartException
      Performs a minimal rebuild of the chart if non-sizing attributes are altered or the dataset for any series has changed. However, if sizing attribute changes occur that affects the relative position of the various chart subcomponents, a re-build is required.
      Parameters:
      gcs - A previously built chart encapsulated in a transient structure.
      Throws:
      ChartException