Examples of org.pentaho.reporting.engine.classic.core.function.Function

Package org.pentaho.reporting.engine.classic.core.function

Examples of org.pentaho.reporting.engine.classic.core.function.Function

org.pentaho.reporting.engine.classic.core.function.Function
The interface for report functions. A report function separates the business logic from presentation of the result. The function is called whenever JFreeReport changes its state while generating the report. The working model for the functions is based on cloning the state of the function on certain checkpoints to support the ReportState implementation of JFreeReport.
Although functions support the ReportListener interface, they are not directly added to a report. A report FunctionCollection is used to control the functions. Functions are required to be cloneable.
@author Thomas Morgner

        expression.setRuntime(runtime);
        try
        {
          if (expression instanceof Function)
          {
            final Function e = (Function) expression;
            e.itemsStarted(event);
          }
          evaluateSingleExpression(expression);
        }
        catch (final InvalidReportStateException rse)
        {

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        expression.setRuntime(runtime);
        try
        {
          if (expression instanceof Function)
          {
            final Function e = (Function) expression;
            e.itemsFinished(event);
          }
          evaluateSingleExpression(expression);
        }
        catch (final InvalidReportStateException rse)
        {

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        expression.setRuntime(runtime);
        try
        {
          if (expression instanceof Function)
          {
            final Function e = (Function) expression;
            e.groupStarted(event);
          }
          evaluateSingleExpression(expression);
        }
        catch (final InvalidReportStateException rse)
        {

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        expression.setRuntime(runtime);
        try
        {
          if (expression instanceof Function)
          {
            final Function e = (Function) expression;
            e.groupFinished(event);
          }
          evaluateSingleExpression(expression);
        }
        catch (final InvalidReportStateException rse)
        {

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        expression.setRuntime(runtime);
        try
        {
          if (expression instanceof Function)
          {
            final Function e = (Function) expression;
            e.summaryRowSelection(event);
          }
          evaluateSingleExpression(expression);
        }
        catch (final InvalidReportStateException rse)
        {

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        expression.setRuntime(runtime);
        try
        {
          if (expression instanceof Function)
          {
            final Function e = (Function) expression;
            e.reportStarted(event);
          }
          evaluateSingleExpression(expression);
        }
        catch (final InvalidReportStateException rse)
        {

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        expression.setRuntime(runtime);
        try
        {
          if (expression instanceof Function)
          {
            final Function e = (Function) expression;
            e.reportDone(event);
          }
          evaluateSingleExpression(expression);
        }
        catch (final InvalidReportStateException rse)
        {

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        expression.setRuntime(runtime);
        try
        {
          if (expression instanceof Function)
          {
            final Function e = (Function) expression;
            e.reportFinished(event);
          }
          evaluateSingleExpression(expression);
        }
        catch (final InvalidReportStateException rse)
        {

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        expression.setRuntime(runtime);
        try
        {
          if (expression instanceof Function)
          {
            final Function e = (Function) expression;
            e.reportInitialized(event);
          }
          evaluateSingleExpression(expression);
        }
        catch (final InvalidReportStateException rse)
        {

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  {
    if (cursor < outputFunction.length == false)
    {
      throw new IllegalStateException();
    }
    final Function retval = outputFunction[cursor];
    cursor = findNextIndex();
    return retval;
  }

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