Knowledge Base Nr: 00336 evalstring.java - http://www.swe-kaiser.de

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Java: Evaluate Value from String

  
	private String EvaluateMacroString(String sText)
	{
		String sCalcFlaot = sText.replaceAll("CALCFLOAT\\((.*)\\)", "$1");
		String sCalc = sText.replaceAll("CALC\\((.*)\\)", "$1");

		if (!sCalcFlaot.equals(sText))
		{
			String sSplit[] = sCalcFlaot.split("[+-/\\*]");
			sSplit[0] = sSplit[0].trim();
			sSplit[1] = sSplit[1].trim();

			try
			{
				if (sCalc.contains("+"))
					sText = Float.toString( Float.parseFloat(sSplit[0]) + Float.parseFloat(sSplit[1]));
				else if (sCalc.contains("-"))
					sText = Float.toString( Float.parseFloat(sSplit[0]) - Float.parseFloat(sSplit[1]));
				else if (sCalc.contains("*"))
					sText = Float.toString( Float.parseFloat(sSplit[0]) * Float.parseFloat(sSplit[1]));
				else if (sCalc.contains("/"))
					sText = Float.toString( Float.parseFloat(sSplit[0]) / Float.parseFloat(sSplit[1]));
			}
			catch (Exception e)
			{
				sText = "*NAN*";
			}
		}
		else if (!sCalc.equals(sText))
		{
			String sSplit[] = sCalc.split("[+-/\\*]");
			sSplit[0] = sSplit[0].trim();
			sSplit[1] = sSplit[1].trim();

			try
			{
				if (sCalc.contains("+"))
					sText = Integer.toString( Integer.parseInt(sSplit[0]) + Integer.parseInt(sSplit[1]));
				else if (sCalc.contains("-"))
					sText = Integer.toString( Integer.parseInt(sSplit[0]) - Integer.parseInt(sSplit[1]));
				else if (sCalc.contains("*"))
					sText = Integer.toString( Integer.parseInt(sSplit[0]) * Integer.parseInt(sSplit[1]));
				else if (sCalc.contains("/"))
					sText = Integer.toString( Integer.parseInt(sSplit[0]) / Integer.parseInt(sSplit[1]));
			}
			catch (Exception e)
			{
				sText = "*NAN*";
			}
		}
		else
		{
			sText = FormatMacroString(sText);	//unbekannte funktion - evtl. formatierung
		}

		return sText;
	}