Package net.sf.saxon.value

Examples of net.sf.saxon.value.NumericValue

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     * Evaluate the expression.
     */

    public Item evaluateItem(XPathContext context) throws XPathException {

        NumericValue v1 = (NumericValue) operand.evaluateItem(context);
        if (v1 == null) {
            return backwardsCompatible ? DoubleValue.NaN : null;
        }
        return v1.negate();
    }
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    public Item evaluateItem(XPathContext context) throws XPathException {

        AtomicValue val0 = (AtomicValue)argument[0].evaluateItem(context);
        if (val0==null) return null;
        NumericValue val = (NumericValue)val0;

        switch (operation) {
            case FLOOR:
                return val.floor();
            case CEILING:
                return val.ceiling();
            case ROUND:
                return val.round();
            case HALF_EVEN:
                int scale = 0;
                if (argument.length==2) {
                    AtomicValue scaleVal0 = (AtomicValue)argument[1].evaluateItem(context);
                    NumericValue scaleVal = (NumericValue)scaleVal0;
                    scale = (int)scaleVal.longValue();
                }
                return val.roundHalfToEven(scale);
            case ABS:
                double sign = val.signum();
                if (sign < 0) {
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        if (sv.isZeroLength()) {
            return StringValue.EMPTY_STRING;
        }

        AtomicValue a1 = (AtomicValue)argument[1].evaluateItem(context);
        NumericValue a = (NumericValue)a1;

        if (argument.length==2) {
            return StringValue.makeStringValue(substring(sv, a));
        } else {
            AtomicValue b2 = (AtomicValue)argument[2].evaluateItem(context);
            NumericValue b = (NumericValue)b2;
            return StringValue.makeStringValue(substring(sv, a, b, context));
        }
    }
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                return "";
            } else if (lstart <= 0) {
                lstart = 1;
            }
        } else {
            NumericValue rstart = start.round();
            // We need to be careful to handle cases such as plus/minus infinity
            if (rstart.isNaN()) {
                return "";
            } else if (rstart.signum() <= 0) {
                return s;
            } else if (rstart.compareTo(slength) > 0) {
                // this works even where the string contains surrogate pairs,
                // because the Java length is always >= the XPath length
                return "";
            } else {
                try {
                    lstart = rstart.longValue();
                } catch (XPathException err) {
                    // this shouldn't happen unless the string length exceeds the bounds
                    // of a long
                    throw new AssertionError("string length out of permissible range");
                }
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                    throw new AssertionError("string length out of permissible range");
                }
            }
        }

        NumericValue end;
        try {
            //end = start.arithmetic(Token.PLUS, len.round(), context);
            end = (NumericValue)ArithmeticExpression.compute(start, Calculator.PLUS, len.round(), context);
        } catch (XPathException e) {
            throw new AssertionError("Unexpected arithmetic failure in substring");
        }
        long lend;
        if (end instanceof Int64Value) {
            //noinspection RedundantCast
            lend = ((Int64Value)end).longValue();
        } else {
            // We need to be careful to handle cases such as plus/minus infinity and NaN
            if (end.isNaN()) {
                return "";
            } else if (end.signum() <= 0) {
                return "";
            } else if (end.compareTo(slength) > 0) {
                // this works even where the string contains surrogate pairs,
                // because the Java length is always >= the XPath length
                lend = slength+1;
            } else {
                try {
                    lend = end.ceiling().longValue();
                } catch (XPathException err) {
                    // this shouldn't happen unless the string length exceeds the bounds
                    // of a long
                    throw new AssertionError("string length out of permissible range");
                }
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    public static CharSequence unicodeToString(SequenceIterator chars, XPathContext context) throws XPathException {
        FastStringBuffer sb = new FastStringBuffer(256);
        NameChecker checker = context.getConfiguration().getNameChecker();
        while (true) {
            NumericValue nextInt = (NumericValue)chars.next();
            if (nextInt == null) {
                return sb.condense();
            }
            long next = nextInt.longValue();
            if (next < 0 || next > Integer.MAX_VALUE || !checker.isValidChar((int)next)) {
                XPathException e = new XPathException("Invalid XML character [x " + Integer.toHexString((int)next) + ']');
                e.setErrorCode("FOCH0001");
                if (context instanceof XPathContext) {
                    e.setXPathContext((XPathContext)context);
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        Expression e = super.optimize(visitor, contextItemType);
        if (e != this) {
            return e;
        }
        if (argument[1] instanceof Literal) {
            NumericValue val = (NumericValue)((Literal)argument[1]).getValue();
            if (val.compareTo(1) < 0 || val.compareTo(Integer.MAX_VALUE) > 0 || !val.isWholeNumber()) {
                return new Literal(EmptySequence.getInstance());
            }
        }
        return this;
    }
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    * Evaluate the function to return the selected item.
    */

    public Item evaluateItem(XPathContext context) throws XPathException {

        NumericValue index = (NumericValue)argument[1].evaluateItem(context);
        if (index == null) {
            return null;
        }
        if (index.compareTo(Integer.MAX_VALUE) <= 0 && index.isWholeNumber()) {
            int intindex = (int)index.longValue();
            if (intindex < 1) {
                return null;
            }
            SequenceIterator base = argument[0].iterate(context);
            if (intindex == 1) {
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     *          if any dynamic error occurs evaluating the
     *          expression
     */

    public boolean effectiveBooleanValue(XPathContext context) throws XPathException {
        NumericValue n = (NumericValue)operand.evaluateItem(context);
        if (n.isNaN()) {
            return (operator == Token.FNE);
        }
        int c = n.compareTo(comparand);
        switch (operator) {
            case Token.FEQ:
                return c == 0;
            case Token.FNE:
                return c != 0;
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    */

    public SequenceIterator iterate(XPathContext context) throws XPathException {
        SequenceIterator seq = argument[0].iterate(context);
        AtomicValue n0 = (AtomicValue)argument[1].evaluateItem(context);
        NumericValue n = (NumericValue)n0;
        int pos = (int)n.longValue();
        if (pos < 1) {
            return seq;
        }
        return new RemoveIterator(seq, pos);
    }
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Related Classes of net.sf.saxon.value.NumericValue

  • net.sf.saxon.expr.CompareToIntegerConstant
  • net.sf.saxon.expr.IntegerRangeTest
  • net.sf.saxon.expr.MinimaxComparison
  • net.sf.saxon.expr.NegateExpression
  • net.sf.saxon.expr.RangeExpression
  • net.sf.saxon.functions.CodepointsToString
  • net.sf.saxon.functions.FormatNumber
  • net.sf.saxon.functions.FormatNumber2
  • net.sf.saxon.functions.Insert
  • net.sf.saxon.functions.IsWholeNumber
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