Examples of org.apache.poi.hssf.record.formula.eval.EvaluationException

Package org.apache.poi.hssf.record.formula.eval

Examples of org.apache.poi.hssf.record.formula.eval.EvaluationException

org.apache.poi.hssf.record.formula.eval.EvaluationException
Eval arg0 = args[0]; if(arg0 instanceof ErrorEval) { return arg0; } if(!(arg0 instanceof AreaEval)) { return ErrorEval.VALUE_INVALID; } double temp = 0; AreaEval area = (AreaEval)arg0; ValueEval[] values = area.getValues(); for (int i = 0; i < values.length; i++) { ValueEval ve = values[i]; if(ve instanceof ErrorEval) { return ve; } if(!(ve instanceof NumericValueEval)) { return ErrorEval.VALUE_INVALID; } temp += ((NumericValueEval)ve).getNumberValue(); } // ... } In this example, if any error is encountered while processing the arguments, an error is returned immediately. This code is difficult to refactor due to all the points where errors are returned.
Using EvaluationException allows the error returning code to be consolidated to one place.
```
 public Eval evaluate(Eval[] args, int srcRow, short srcCol) { try { // ... AreaEval area = getAreaArg(args[0]); double temp = sumValues(area.getValues()); // ... } catch (EvaluationException e) { return e.getErrorEval(); } } private static AreaEval getAreaArg(Eval arg0) throws EvaluationException { if (arg0 instanceof ErrorEval) { throw new EvaluationException((ErrorEval) arg0); } if (arg0 instanceof AreaEval) { return (AreaEval) arg0; } throw EvaluationException.invalidValue(); } private double sumValues(ValueEval[] values) throws EvaluationException { double temp = 0; for (int i = 0; i < values.length; i++) { ValueEval ve = values[i]; if (ve instanceof ErrorEval) { throw new EvaluationException((ErrorEval) ve); } if (!(ve instanceof NumericValueEval)) { throw EvaluationException.invalidValue(); } temp += ((NumericValueEval) ve).getNumberValue(); } return temp; } 
```
It is not mandatory to use EvaluationException, doing so might give the following advantages:
- Methods can more easily be extracted, allowing for re-use.
- Type management (typecasting etc) is simpler because error conditions have been separated from intermediate calculation values.
- Fewer local variables are required. Local variables can have stronger types.
- It is easier to mimic common Excel error handling behaviour (exit upon encountering first error), because exceptions conveniently propagate up the call stack regardless of execution points or the number of levels of nested calls.
Note - Only standard evaluation errors are represented by EvaluationException ( i.e. conditions expected to be encountered when evaluating arbitrary Excel formulas). Conditions that could never occur in an Excel spreadsheet should result in runtime exceptions. Care should be taken to not translate any POI internal error into an Excel evaluation error code. @author Josh Micich

    int width = areaEval.getWidth();
    for (int rrIx=0; rrIx<height; rrIx++) {
      for (int rcIx=0; rcIx<width; rcIx++) {
        ValueEval ve = areaEval.getRelativeValue(rrIx, rcIx);
        if (ve instanceof ErrorEval) {
          throw new EvaluationException((ErrorEval) ve);
        }
      }
    }
  }

View Full Code Here


    if(ve instanceof BlankEval || ve == null) {
      // TODO - shouldn't BlankEval.INSTANCE be used always instead of null?
      // null seems to occur when the blank cell is part of an area ref (but not reliably)
      if(isScalarProduct) {
        throw new EvaluationException(ErrorEval.VALUE_INVALID);
      }
      return 0;
    }


    if(ve instanceof ErrorEval) {
      throw new EvaluationException((ErrorEval)ve);
    }
    if(ve instanceof StringEval) {
      if(isScalarProduct) {
        throw new EvaluationException(ErrorEval.VALUE_INVALID);
      }
      // Note for area SUMPRODUCTs, string values are interpreted as zero
      // even if they would parse as valid numeric values
      return 0;
    }

View Full Code Here

   *
   * @param v
   */
  public static double evaluate(double[] v) throws EvaluationException {
    if (v.length < 2) {
      throw new EvaluationException(ErrorEval.NA);
    }


    // very naive impl, may need to be optimized
    int[] counts = new int[v.length];
    Arrays.fill(counts, 1);
    for (int i = 0, iSize = v.length; i < iSize; i++) {
      for (int j = i + 1, jSize = v.length; j < jSize; j++) {
        if (v[i] == v[j])
          counts[i]++;
      }
    }
    double maxv = 0;
    int maxc = 0;
    for (int i = 0, iSize = counts.length; i < iSize; i++) {
      if (counts[i] > maxc) {
        maxv = v[i];
        maxc = counts[i];
      }
    }
    if (maxc > 1) {
      return maxv;
    }
    throw new EvaluationException(ErrorEval.NA);


  }

View Full Code Here

  }


  private static void collectValue(Eval arg, List<Double> temp, boolean mustBeNumber)
      throws EvaluationException {
    if (arg instanceof ErrorEval) {
      throw new EvaluationException((ErrorEval) arg);
    }
    if (arg == BlankEval.INSTANCE || arg instanceof BoolEval || arg instanceof StringEval) {
      if (mustBeNumber) {
        throw EvaluationException.invalidValue();
      }

View Full Code Here

      return ((AreaEval) eval).offset(0, aeRange.getHeight()-1, 0, aeRange.getWidth()-1);
    }
    if (eval instanceof RefEval) {
      return ((RefEval)eval).offset(0, aeRange.getHeight()-1, 0, aeRange.getWidth()-1);
    }
    throw new EvaluationException(ErrorEval.VALUE_INVALID);
  }

View Full Code Here

      return (AreaEval) eval;
    }
    if (eval instanceof RefEval) {
      return ((RefEval)eval).offset(0, 0, 0, 0);
    }
    throw new EvaluationException(ErrorEval.VALUE_INVALID);
  }

View Full Code Here

        atleastOneNonBlank = true;
      }
    }


    if (!atleastOneNonBlank) {
      throw new EvaluationException(ErrorEval.VALUE_INVALID);
    }
    return result;
  }

View Full Code Here

    return result;
  }


  private static final void checkValue(double result) throws EvaluationException {
    if (Double.isNaN(result) || Double.isInfinite(result)) {
      throw new EvaluationException(ErrorEval.NUM_ERROR);
    }
  }

View Full Code Here

    protected OneArg() {
      // no fields to initialise
    }
    protected final double eval(Eval[] args, int srcCellRow, short srcCellCol) throws EvaluationException {
      if (args.length != 1) {
        throw new EvaluationException(ErrorEval.VALUE_INVALID);
      }
      double d = singleOperandEvaluate(args[0], srcCellRow, srcCellCol);
      return evaluate(d);
    }

View Full Code Here

    protected TwoArg() {
      // no fields to initialise
    }
    protected final double eval(Eval[] args, int srcCellRow, short srcCellCol) throws EvaluationException {
      if (args.length != 2) {
        throw new EvaluationException(ErrorEval.VALUE_INVALID);
      }
      double d0 = singleOperandEvaluate(args[0], srcCellRow, srcCellCol);
      double d1 = singleOperandEvaluate(args[1], srcCellRow, srcCellCol);
      return evaluate(d0, d1);
    }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of org.apache.poi.hssf.record.formula.eval.EvaluationException

org.apache.poi.hssf.record.formula.atp.YearFrac

org.apache.poi.hssf.record.formula.atp.YearFracCalculator

org.apache.poi.hssf.record.formula.functions.BooleanFunction

org.apache.poi.hssf.record.formula.functions.DateFunc

org.apache.poi.hssf.record.formula.functions.Index

org.apache.poi.hssf.record.formula.functions.LookupUtils

org.apache.poi.hssf.record.formula.functions.Match

org.apache.poi.hssf.record.formula.functions.Mode

org.apache.poi.hssf.record.formula.functions.MultiOperandNumericFunction

org.apache.poi.hssf.record.formula.functions.NumericFunction

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.