Examples of org.jfree.report.expressions.Expression

org.jfree.report.expressions.Expression
An expression is a lightweight computation that does not maintain a state. Expressions are used to calculate values within a single row of a report. Expressions can use a dataRow to access other fields, expressions or functions within the current row in the report. Statefull computations can be implemented using functions. @author Thomas Morgner @see Function

        final Iterator it =
            attrsNs.entrySet().iterator();
        while (it.hasNext())
        {
          final Map.Entry entry = (Map.Entry) it.next();
          final Expression exp = (Expression) entry.getValue();
          entry.setValue(exp.clone());
        }
      }
    }


    if (expressions != null)
    {
      element.expressions = (ArrayList) expressions.clone();
      element.expressions.clear();
      for (int i = 0; i < expressions.size(); i++)
      {
        final Expression expression = (Expression) expressions.get(i);
        element.expressions.add(expression.clone());
      }
    }
    if (styleExpressions != null)
    {
      element.styleExpressions = (HashMap) styleExpressions.clone();
      final Iterator styleExpressionsIt =
          element.styleExpressions.entrySet().iterator();
      while (styleExpressionsIt.hasNext())
      {
        final Map.Entry entry = (Map.Entry) styleExpressionsIt.next();
        final Expression exp = (Expression) entry.getValue();
        entry.setValue(exp.clone());
      }
    }


    if (displayCondition != null)
    {

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    if (!node.isEnabled())
    {
      return false;
    }


    final Expression expression = node.getDisplayCondition();
    if (expression == null)
    {
      return true;
    }

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            // try to derive whether there was a change.
            isPrintableContent = false;
        }


        // 3. Evaluate the Display Condition
        final Expression dc = text.getDisplayCondition();
        if (dc != null)
        {
            final Object o = LayoutControllerUtil.evaluateExpression(getFlowController(), text, dc);
            if (Boolean.FALSE.equals(o))
            {

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            if (child instanceof ReportElement && child.isEnabled())
            {
                final ReportElement element = (ReportElement) child;
                if (element.getFormatConditionCount() > 0)
                {
                    final Expression displayCond = element.getDisplayCondition();
                    if (displayCond != null)
                    {
                        try
                        {
                            if (Boolean.FALSE.equals(LayoutControllerUtil.evaluateExpression(getFlowController(), element, displayCond)))

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            // try to derive whether there was a change.
            isPrintableContent = false;
        }


        // 3. Evaluate the Display Condition
        final Expression dc = text.getDisplayCondition();
        if (dc != null)
        {
            final Object o = LayoutControllerUtil.evaluateExpression(getFlowController(), text, dc);
            if (Boolean.FALSE.equals(o))
            {

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        final FormattedTextElement element = findFormattedTextElement(cell);
        if (element == null)
        {
            return null;
        }
        final Expression dc = element.getDisplayCondition();
        if (dc != null)
        {
            final Object o = LayoutControllerUtil.evaluateExpression(getFlowController(), element, dc);
            if (Boolean.FALSE.equals(o))
            {

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            if (child instanceof ReportElement && child.isEnabled())
            {
                final ReportElement element = (ReportElement) child;
                if (element.getFormatConditionCount() > 0)
                {
                    final Expression displayCond = element.getDisplayCondition();
                    if (displayCond != null)
                    {
                        try
                        {
                            if (Boolean.FALSE.equals(LayoutControllerUtil.evaluateExpression(getFlowController(), element, displayCond)))

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        final Iterator it =
            attrsNs.entrySet().iterator();
        while (it.hasNext())
        {
          final Map.Entry entry = (Map.Entry) it.next();
          final Expression exp = (Expression) entry.getValue();
          entry.setValue(exp.clone());
        }
      }
    }


    if (expressions != null)
    {
      element.expressions = (ArrayList) expressions.clone();
      element.expressions.clear();
      for (int i = 0; i < expressions.size(); i++)
      {
        final Expression expression = (Expression) expressions.get(i);
        element.expressions.add(expression.clone());
      }
    }
    if (styleExpressions != null)
    {
      element.styleExpressions = (HashMap) styleExpressions.clone();
      final Iterator styleExpressionsIt =
          element.styleExpressions.entrySet().iterator();
      while (styleExpressionsIt.hasNext())
      {
        final Map.Entry entry = (Map.Entry) styleExpressionsIt.next();
        final Expression exp = (Expression) entry.getValue();
        entry.setValue(exp.clone());
      }
    }


    if (displayCondition != null)
    {

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        ler = getExpressionRuntime(fc, node);
      }


      ler.setDeclaringParent(group);


      final Expression groupingExpression = group.getGroupingExpression();
      if (groupingExpression != null)
      {
        groupingExpression.setRuntime(ler);
        final Object groupFinished;
        try
        {
          groupFinished = groupingExpression.computeValue();
        }
        finally
        {
          groupingExpression.setRuntime(null);
        }


        if (Boolean.TRUE.equals(groupFinished))
        {
          // If the group expression returns true, we should pack our belongings

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    while (styleExIt.hasNext())
    {
      final Map.Entry entry = (Map.Entry) styleExIt.next();
      final String name = (String) entry.getKey();
      final Expression expression = (Expression) entry.getValue();
      try
      {
        expression.setRuntime(runtime);
        final Object value = expression.computeValue();
        if (value instanceof CSSValue)
        {
          final CSSValue cssvalue = (CSSValue) value;
          final StyleKey keyByName =
              StyleKeyRegistry.getRegistry().findKeyByName(name);
          if (keyByName != null)
          {
            targetRule.setPropertyValue(keyByName, cssvalue);
          }
          else
          {
            targetRule.setPropertyValueAsString(name, cssvalue.getCSSText());
          }
        }
        else if (value != null)
        {
          targetRule.setPropertyValueAsString(name, String.valueOf(value));
        }
      }
      finally
      {
        expression.setRuntime(null);
      }
    }
    return targetRule;
  }

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