Package client.net.sf.saxon.ce.type

Examples of client.net.sf.saxon.ce.type.TypeHierarchy

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            return sequence;
        }

        if (requiredType != null) {
            // if declaration is null, we've already done the type checking in a previous pass
            final TypeHierarchy th = visitor.getConfiguration().getTypeHierarchy();
            SequenceType decl = requiredType;
            SequenceType sequenceType = SequenceType.makeSequenceType(
                    decl.getPrimaryType(), StaticProperty.ALLOWS_ZERO_OR_MORE);
            RoleLocator role = new RoleLocator(RoleLocator.VARIABLE, variableName, 0
            );
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    * Notify all references to this variable of the data type
    */

    public void fixupReferences() throws XPathException {
        final SequenceType type = getRequiredType();
        final TypeHierarchy th = getConfiguration().getTypeHierarchy();
        final Iterator iter = references.iterator();
        while (iter.hasNext()) {
            Value constantValue = null;
            int properties = 0;
            if (this instanceof XSLVariable) {
                if (select instanceof Literal) {
                    // we can't rely on the constant value because it hasn't yet been type-checked,
                    // which could change it (eg by numeric promotion). Rather than attempt all the type-checking
                    // now, we do a quick check. See test bug64
                    int relation = th.relationship(select.getItemType(th), type.getPrimaryType());
                    if (relation == TypeHierarchy.SAME_TYPE || relation == TypeHierarchy.SUBSUMED_BY) {
                        constantValue = ((Literal)select).getValue();
                    }
                }
                if (select != null) {
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        Executable exec = visitor.getExecutable();
        if (exec == null) {
            // happens during use-when evaluation
            return;
        }
        TypeHierarchy th = exec.getConfiguration().getTypeHierarchy();
        ItemType oldItemType = getItemType(th);
        ItemType newItemType = oldItemType;
        if (th.isSubType(type, oldItemType)) {
            newItemType = type;
        }
        int newcard = cardinality & getCardinality();
        if (newcard==0) {
            // this will probably lead to a type error later
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    protected ItemType getReturnedItemType() {
        if (select==null) {
            return getCommonChildItemType();
        } else {
            final TypeHierarchy th = getConfiguration().getTypeHierarchy();
            return select.getItemType(th);
        }
    }
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    * Type-check the expression
    */

    public Expression typeCheck(ExpressionVisitor visitor, ItemType contextItemType) throws XPathException {

        final TypeHierarchy th = visitor.getConfiguration().getTypeHierarchy();

        // The order of events is critical here. First we ensure that the type of the
        // sequence expression is established. This is used to establish the type of the variable,
        // which in turn is required when type-checking the action part.

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     * @return the expression after type-checking (potentially modified to add run-time
     *         checks and/or conversions)
     */

    public Expression typeCheck(ExpressionVisitor visitor, ItemType contextItemType) throws XPathException {
        final TypeHierarchy th = visitor.getConfiguration().getTypeHierarchy();
        start = visitor.typeCheck(start, contextItemType);
        adoptChildExpression(start);

        Expression filter2 = visitor.typeCheck(filter, start.getItemType(th));
        if (filter2 != filter) {
            filter = filter2;
            adoptChildExpression(filter2);
        }

        if (Literal.isConstantOne(filter)) {
            return new FirstItemExpression(start);
        }

        if (filter instanceof Last) {
            return new LastItemExpression(start);
        }

        // determine whether the filter always evaluates to a single boolean
        filterIsSingletonBoolean =
                filter.getCardinality() == StaticProperty.EXACTLY_ONE &&
                        filter.getItemType(th).equals(BuiltInAtomicType.BOOLEAN);

        // determine whether the filter evaluates to a single number, where the number will be the same for
        // all values in the sequence
        filterIsIndependentNumeric =
                th.isSubType(filter.getItemType(th), BuiltInAtomicType.NUMERIC) &&
                        (filter.getDependencies() &
                                (StaticProperty.DEPENDS_ON_CONTEXT_ITEM | StaticProperty.DEPENDS_ON_POSITION)) == 0 &&
                        !Cardinality.allowsMany(filter.getCardinality());
        visitor.resetStaticProperties();
        return this;
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     *                        (typically a type error)
     */

    public Expression optimize(ExpressionVisitor visitor, ItemType contextItemType) throws XPathException {
        final Optimizer opt = visitor.getConfiguration().getOptimizer();
        final TypeHierarchy th = visitor.getConfiguration().getTypeHierarchy();

        Expression start2 = visitor.optimize(start, contextItemType);
        if (start2 != start) {
            start = start2;
            adoptChildExpression(start2);
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            } else {
                return (val.effectiveBooleanValue() ? start : Literal.makeEmptySequence());
            }
        }
        if (filter instanceof ComparisonExpression) {
            TypeHierarchy th = visitor.getConfiguration().getTypeHierarchy();
            Expression[] operands = ((ComparisonExpression)filter).getOperands();
            int operator = ((ComparisonExpression)filter).getSingletonOperator();
            Expression comparand;
            if (operands[0] instanceof Position
                    && th.isSubType(operands[1].getItemType(th), BuiltInAtomicType.NUMERIC)) {
                comparand = operands[1];
            } else if (operands[1] instanceof Position
                    && th.isSubType(operands[0].getItemType(th), BuiltInAtomicType.NUMERIC)) {
                comparand = operands[0];
                operator = Token.inverse(operator);
            } else {
                return null;
            }
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            } catch (XPathException err) {
                compileError(err);
            }
        }
        final TypeHierarchy th = config.getTypeHierarchy();
        BuiltInAtomicType useType = (BuiltInAtomicType)use.getItemType(th).getPrimitiveItemType();
        if (xPath10ModeIsEnabled()) {
            if (!useType.equals(BuiltInAtomicType.STRING) && !useType.equals(BuiltInAtomicType.UNTYPED_ATOMIC)) {
                use = new AtomicSequenceConverter(use, BuiltInAtomicType.STRING);
                useType = BuiltInAtomicType.STRING;
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     */

    public Expression typeCheck(ExpressionVisitor visitor, ItemType contextItemType) throws XPathException {

        final Configuration config = visitor.getConfiguration();
        final TypeHierarchy th = config.getTypeHierarchy();

        if (Literal.isEmptySequence(operand0)) {
            return new Literal(DoubleValue.NaN);
        }

        if (Literal.isEmptySequence(operand1)) {
            return new Literal(DoubleValue.NaN);
        }

        Expression oldOp0 = operand0;
        Expression oldOp1 = operand1;

        operand0 = visitor.typeCheck(operand0, contextItemType);
        operand1 = visitor.typeCheck(operand1, contextItemType);


        SequenceType atomicType = SequenceType.OPTIONAL_ATOMIC;

        RoleLocator role0 = new RoleLocator(RoleLocator.BINARY_EXPR, Token.tokens[operator], 0);
        //role0.setSourceLocator(this);
        operand0 = TypeChecker.staticTypeCheck(operand0, atomicType, true, role0, visitor);

        RoleLocator role1 = new RoleLocator(RoleLocator.BINARY_EXPR, Token.tokens[operator], 1);
        //role1.setSourceLocator(this);
        operand1 = TypeChecker.staticTypeCheck(operand1, atomicType, true, role1, visitor);

        final ItemType itemType0 = operand0.getItemType(th);
        if (itemType0 instanceof EmptySequenceTest) {
            return Literal.makeLiteral(DoubleValue.NaN);
        }
        AtomicType type0 = (AtomicType) itemType0.getPrimitiveItemType();

        final ItemType itemType1 = operand1.getItemType(th);
        if (itemType1 instanceof EmptySequenceTest) {
            return Literal.makeLiteral(DoubleValue.NaN);
        }
        AtomicType type1 = (AtomicType)itemType1.getPrimitiveItemType();

        // If both operands are integers, use integer arithmetic and convert the result to a double
        if (th.isSubType(type0, BuiltInAtomicType.INTEGER) &&
                th.isSubType(type1, BuiltInAtomicType.INTEGER) &&
                (operator == Token.PLUS || operator == Token.MINUS || operator == Token.MULT)) {
            ArithmeticExpression arith = new ArithmeticExpression(operand0, operator, operand1);
            arith.simplified = true;
            NumberFn n = (NumberFn)SystemFunction.makeSystemFunction("number", new Expression[]{arith});
            return n.typeCheck(visitor, contextItemType);
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Related Classes of client.net.sf.saxon.ce.type.TypeHierarchy

  • client.net.sf.saxon.ce.Configuration
  • client.net.sf.saxon.ce.expr.AdjacentTextNodeMerger
  • client.net.sf.saxon.ce.expr.ArithmeticExpression
  • client.net.sf.saxon.ce.expr.ArithmeticExpression10
  • client.net.sf.saxon.ce.expr.Atomizer
  • client.net.sf.saxon.ce.expr.BooleanExpression
  • client.net.sf.saxon.ce.expr.Calculator$AnyDivAny
  • client.net.sf.saxon.ce.expr.Calculator$AnyIdivAny
  • client.net.sf.saxon.ce.expr.Calculator$AnyMinusAny
  • client.net.sf.saxon.ce.expr.Calculator$AnyModAny
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