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

      NumberEval ne = (NumberEval) ve;
      temp.add(ne.getNumberValue());
      return;
    }
    if (ve instanceof ErrorEval) {
      throw new EvaluationException((ErrorEval) ve);
    }
    if (ve instanceof StringEval) {
      if (isViaReference) {
        // ignore all ref strings
        return;
      }
      String s = ((StringEval) ve).getStringValue();
      Double d = OperandResolver.parseDouble(s);
      if(d == null) {
        throw new EvaluationException(ErrorEval.VALUE_INVALID);
      }
      temp.add(d.doubleValue());
      return;
    }
    if (ve instanceof BoolEval) {

View Full Code Here

      return new SingleValueVector(re.getInnerValueEval());
    }
    if (eval instanceof AreaEval) {
      ValueVector result = LookupUtils.createVector((AreaEval)eval);
      if (result == null) {
        throw new EvaluationException(ErrorEval.NA);
      }
      return result;
    }


    // Error handling for lookup_range arg is also unusual
    if(eval instanceof NumericValueEval) {
      throw new EvaluationException(ErrorEval.NA);
    }
    if (eval instanceof StringEval) {
      StringEval se = (StringEval) eval;
      Double d = OperandResolver.parseDouble(se.getStringValue());
      if(d == null) {
        // plain string
        throw new EvaluationException(ErrorEval.VALUE_INVALID);
      }
      // else looks like a number
      throw new EvaluationException(ErrorEval.NA);
    }
    throw new RuntimeException("Unexpected eval type (" + eval.getClass().getName() + ")");
  }

View Full Code Here

  private static double evaluateMatchTypeArg(ValueEval arg, int srcCellRow, int srcCellCol)
      throws EvaluationException {
    ValueEval match_type = OperandResolver.getSingleValue(arg, srcCellRow, srcCellCol);


    if(match_type instanceof ErrorEval) {
      throw new EvaluationException((ErrorEval)match_type);
    }
    if(match_type instanceof NumericValueEval) {
      NumericValueEval ne = (NumericValueEval) match_type;
      return ne.getNumberValue();
    }
    if (match_type instanceof StringEval) {
      StringEval se = (StringEval) match_type;
      Double d = OperandResolver.parseDouble(se.getStringValue());
      if(d == null) {
        // plain string
        throw new EvaluationException(ErrorEval.VALUE_INVALID);
      }
      // if the string parses as a number, it is OK
      return d.doubleValue();
    }
    throw new RuntimeException("Unexpected match_type type (" + match_type.getClass().getName() + ")");

View Full Code Here

      for (int i = 0; i < size; i++) {
        if(lookupComparer.compareTo(lookupRange.getItem(i)).isEqual()) {
          return i;
        }
      }
      throw new EvaluationException(ErrorEval.NA);
    }


    if(findLargestLessThanOrEqual) {
      // Note - backward iteration
      for (int i = size - 1; i>=0;  i--) {
        CompareResult cmp = lookupComparer.compareTo(lookupRange.getItem(i));
        if(cmp.isTypeMismatch()) {
          continue;
        }
        if(!cmp.isLessThan()) {
          return i;
        }
      }
      throw new EvaluationException(ErrorEval.NA);
    }


    // else - find smallest greater than or equal to
    // TODO - is binary search used for (match_type==+1) ?
    for (int i = 0; i<size; i++) {
      CompareResult cmp = lookupComparer.compareTo(lookupRange.getItem(i));
      if(cmp.isEqual()) {
        return i;
      }
      if(cmp.isGreaterThan()) {
        if(i<1) {
          throw new EvaluationException(ErrorEval.NA);
        }
        return i-1;
      }
    }


    throw new EvaluationException(ErrorEval.NA);
  }

View Full Code Here

    }
    if (eval instanceof AreaEval) {
      AreaEval ae = (AreaEval) eval;
      // an area ref can work as a scalar value if it is 1x1
      if(!ae.isColumn() || !ae.isRow()) {
        throw new EvaluationException(ErrorEval.VALUE_INVALID);
      }
      eval = ae.getRelativeValue(0, 0);
    }


    return getProductTerm(eval, true);

View Full Code Here

    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(ValueEval 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

   * evaluates to an error.
   */
  private static double evaluate(int hours, int minutes, int seconds) throws EvaluationException {


    if (hours > 32767 || minutes > 32767 || seconds > 32767) {
      throw new EvaluationException(ErrorEval.VALUE_INVALID);
    }
    int totalSeconds = hours * SECONDS_PER_HOUR + minutes * SECONDS_PER_MINUTE + seconds;


    if (totalSeconds < 0) {
      throw new EvaluationException(ErrorEval.VALUE_INVALID);
    }
    return (totalSeconds % SECONDS_PER_DAY) / (double)SECONDS_PER_DAY;
  }

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.