Package net.sf.saxon.value

Examples of net.sf.saxon.value.NumericValue

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        Expression e = super.optimize(visitor, contextItemType);
        if (e != this) {
            return e;
        }
        if (getNumberOfArguments() == 2 && Literal.isAtomic(argument[1])) {
            NumericValue start = (NumericValue)((Literal)argument[1]).getValue();
            start = start.round();
            long intstart = start.longValue();
            if (intstart > Integer.MAX_VALUE) {
                return new Literal(EmptySequence.getInstance());
            }
            return new TailExpression(argument[0], (int)intstart);
        }
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    */

    public SequenceIterator iterate(XPathContext context) throws XPathException {
        SequenceIterator seq = argument[0].iterate(context);
        AtomicValue startVal0 = (AtomicValue)argument[1].evaluateItem(context);
        NumericValue startVal = (NumericValue)startVal0;

        if (argument.length == 2) {
            long lstart;
            if (startVal instanceof Int64Value) {
                lstart = startVal.longValue();
                if (lstart <= 1) {
                    return seq;
                }
            } else {
                startVal = startVal.round();
                if (startVal.compareTo(Int64Value.PLUS_ONE) <= 0) {
                    return seq;
                } else if (startVal.compareTo(Int64Value.MAX_LONG) > 0) {
                    return EmptyIterator.getInstance();
                } else if (startVal.isNaN()) {
                    return EmptyIterator.getInstance();
                } else {
                    lstart = startVal.longValue();
                }
            }

            if (lstart > Integer.MAX_VALUE) {
                // we don't allow sequences longer than an this
                return EmptyIterator.getInstance();
            }

            return TailIterator.make(seq, (int)lstart);

        } else {

            // There are three arguments

            AtomicValue lengthVal0 = (AtomicValue)argument[2].evaluateItem(context);
            NumericValue lengthVal = (NumericValue)lengthVal0;

            if (startVal instanceof Int64Value && lengthVal instanceof Int64Value) {
                long lstart = startVal.longValue();
                if (lstart > Integer.MAX_VALUE) {
                    return EmptyIterator.getInstance();
                }
                long llength = lengthVal.longValue();
                if (llength > Integer.MAX_VALUE) {
                    llength = Integer.MAX_VALUE;
                }
                if (llength < 1) {
                    return EmptyIterator.getInstance();
                }
                long lend = lstart + llength - 1;
                if (lend < 1) {
                    return EmptyIterator.getInstance();
                }
                int start = (lstart < 1 ? 1 : (int)lstart);
                return SubsequenceIterator.make(seq, start, (int)lend);
            } else {
                if (startVal.isNaN()) {
                    return EmptyIterator.getInstance();
                }
                if (startVal.compareTo(Int64Value.MAX_LONG) > 0) {
                    return EmptyIterator.getInstance();
                }
                startVal = startVal.round();

                if (lengthVal.isNaN()) {
                    return EmptyIterator.getInstance();
                }
                lengthVal = lengthVal.round();

                if (lengthVal.compareTo(Int64Value.ZERO) <= 0) {
                    return EmptyIterator.getInstance();
                }
                NumericValue rend = (NumericValue)ArithmeticExpression.compute(
                        startVal, Calculator.PLUS, lengthVal, context);
                rend = (NumericValue)ArithmeticExpression.compute(
                        rend, Calculator.MINUS, Int64Value.PLUS_ONE, context);
                if (rend.compareTo(Int64Value.ZERO) <= 0) {
                    return EmptyIterator.getInstance();
                }

                long lstart;
                if (startVal.compareTo(Int64Value.PLUS_ONE) <= 0) {
                    lstart = 1;
                } else {
                    lstart = startVal.longValue();
                }
                if (lstart > Integer.MAX_VALUE) {
                    return EmptyIterator.getInstance();
                }

                long lend;
                if (rend.compareTo(Int64Value.MAX_LONG) >= 0) {
                    lend = Integer.MAX_VALUE;
                } else {
                    lend = rend.longValue();
                }
                return SubsequenceIterator.make(seq, (int)lstart, (int)lend);

            }
        }
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            }
        } else if (b == null) {
            return +1;
        }

        NumericValue an = (NumericValue)a;
        NumericValue bn = (NumericValue)b;

        if (an.isNaN()) {
            return (bn.isNaN() ? 0 : -1);
        } else if (bn.isNaN()) {
            return +1;
        }

        return an.compareTo(bn);
    }
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    * Evaluate in a general context
    */

    public Item evaluateItem(XPathContext c) throws XPathException {
        AtomicValue gp0 = (AtomicValue)argument[0].evaluateItem(c);
        NumericValue gp = (NumericValue)gp0;
        RegexIterator iter = c.getCurrentRegexIterator();
        if (iter == null) {
            return StringValue.EMPTY_STRING;
        }
        String s = iter.getRegexGroup((int)gp.longValue());
        if (s == null) {
            return StringValue.EMPTY_STRING;
        }
        return StringValue.makeStringValue(s);
    }
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    public Item evaluateItem(XPathContext c) throws XPathException {
        AtomicValue av = (AtomicValue)value.evaluateItem(c);
        if (av==null) {
            return BooleanValue.FALSE;
        }
        NumericValue v = (NumericValue)av;

        if (!v.isWholeNumber()) {
            return BooleanValue.FALSE;
        }

        AtomicValue av2 = (AtomicValue)min.evaluateItem(c);
        NumericValue v2 = (NumericValue)av2;

        if (v.compareTo(v2) < 0) {
            return BooleanValue.FALSE;
        }

        AtomicValue av3 = (AtomicValue)max.evaluateItem(c);
        NumericValue v3 = (NumericValue)av3;

        return BooleanValue.get(v.compareTo(v3) <= 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();
        SequenceIterator ins = argument[2].iterate(context);
        return new InsertIterator(seq, ins, pos);
    }
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     *          if any dynamic error occurs evaluating the
     *          expression
     */

    public boolean effectiveBooleanValue(XPathContext context) throws XPathException {
        NumericValue val = (NumericValue)argument[0].evaluateItem(context);
        return val != null && val.isWholeNumber();
    }
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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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