Package net.sf.saxon.type

Examples of net.sf.saxon.type.TypeHierarchy

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        if (operand0 instanceof FilterExpression && operand1 instanceof FilterExpression) {
            final FilterExpression exp0 = (FilterExpression)operand0;
            final FilterExpression exp1 = (FilterExpression)operand1;

            final TypeHierarchy th = visitor.getConfiguration().getTypeHierarchy();
            if (!exp0.isPositional(th) &&
                    !exp1.isPositional(th) &&
                    exp0.getControllingExpression().equals(exp1.getControllingExpression())) {
                final Expression filter;
                switch (operator) {
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     * @return the value that results from the promotion
     */

    protected AtomicValue promote(AtomicValue value, XPathContext context) throws XPathException {
        if (!(value instanceof NumericValue || value instanceof UntypedAtomicValue)) {
            final TypeHierarchy th = context.getConfiguration().getTypeHierarchy();
            XPathException err = new XPathException(
                    "Cannot promote non-numeric value to " + getItemType(th).toString(), "XPTY0004", context);
            err.setLocator(this);
            throw err;
        }
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     * represent the same ItemType.
     * @since 9.1
     */

    public boolean subsumes(ItemType other) {
        TypeHierarchy th = processor.getUnderlyingConfiguration().getTypeHierarchy();
        return th.isSubType(other.getUnderlyingItemType(), underlyingType);
    }
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    /**
     * Type-check the expression
     */

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

        Expression start2 = visitor.typeCheck(start, contextItemType);

        // The first operand must be of type node()*

        RoleLocator role0 = new RoleLocator(RoleLocator.BINARY_EXPR, "/", 0);
        role0.setErrorCode("XPTY0019");
        setStartExpression(
                TypeChecker.staticTypeCheck(start2, SequenceType.NODE_SEQUENCE, false, role0, visitor));

        // Now check the second operand

        setStepExpression(visitor.typeCheck(step, start.getItemType(th)));

        // We distinguish three cases for the second operand: either it is known statically to deliver
        // nodes only (a traditional path expression), or it is known statically to deliver atomic values
        // only (a simple mapping expression), or we don't yet know.

        ItemType stepType = step.getItemType(th);
        if (th.isSubType(stepType, Type.NODE_TYPE)) {

            if ((step.getSpecialProperties() & StaticProperty.NON_CREATIVE) != 0) {

                // A traditional path expression

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            return this;
        }
    }

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

        setStartExpression(visitor.optimize(start, contextItemType));
        setStepExpression(step.optimize(visitor, start.getItemType(th)));

        if (Literal.isEmptySequence(start) || Literal.isEmptySequence(step)) {
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    public Expression typeCheck(ExpressionVisitor visitor, ItemType contextItemType) throws XPathException {
        localTypeCheck(visitor, contextItemType);

        if (select != null) {
            final TypeHierarchy th = visitor.getConfiguration().getTypeHierarchy();
            select = visitor.typeCheck(select, contextItemType);
            if (select instanceof ValueOf) {
                Expression valSelect = ((ValueOf)select).getSelect();
                if (th.isSubType(valSelect.getItemType(th), BuiltInAtomicType.STRING) &&
                        !Cardinality.allowsMany(valSelect.getCardinality())) {
                    select = valSelect;
                }
            }
            if (!select.getItemType(th).isAtomicType()) {
                Atomizer atomizer = new Atomizer(select);
                ExpressionTool.copyLocationInfo(select, atomizer);
                select = visitor.simplify(atomizer);
                select = visitor.typeCheck(atomizer, contextItemType);
            }
            ItemType itemType = select.getItemType(th);
            if (!(th.isSubType(itemType, BuiltInAtomicType.STRING) ||
                    th.isSubType(itemType, BuiltInAtomicType.UNTYPED_ATOMIC))) {
                select = new AtomicSequenceConverter(select, BuiltInAtomicType.STRING);
            }
            // Don't bother converting untypedAtomic to string
            if (select instanceof StringFn) {
                StringFn fn = (StringFn)select;
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    public Item evaluateItem(XPathContext context) throws XPathException {
        String content = (select==null ?
                    "" :
                    select.evaluateAsString(context).toString());
        content = checkContent(content, context);
        final TypeHierarchy th = context.getConfiguration().getTypeHierarchy();
        Orphan o = new Orphan(context.getConfiguration());
        o.setNodeKind((short)getItemType(th).getPrimitiveType());
        o.setStringValue(content);
        o.setNameCode(evaluateNameCode(context));
        return o;
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        this.formatter = formatter;
        this.numberer = numberer;
        this.hasVariablesInPatterns = hasVariablesInPatterns;
        this.backwardsCompatible = backwardsCompatible;

        final TypeHierarchy th = config.getTypeHierarchy();
        if (this.value != null && !this.value.getItemType(th).isAtomicType()) {
            this.value = new Atomizer(this.value);
        }

        Iterator<Expression> kids = iterateSubExpressions();
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        select = visitor.typeCheck(select, contextItemType);
        separator = visitor.typeCheck(separator, contextItemType);
        if (!Cardinality.allowsMany(select.getCardinality())) {
            isSingleton = true;
        }
        final TypeHierarchy th = visitor.getConfiguration().getTypeHierarchy();
        ItemType itemType = select.getItemType(th);
        if (itemType.isAtomicType()) {
            isAtomic = true;
        }
        select.setFlattened(true);
        if (select instanceof Literal && separator instanceof Literal) {
            XPathContext c = visitor.getStaticContext().makeEarlyEvaluationContext();
            return new Literal(Value.asValue(evaluateItem(c)));
        }
        boolean isUntyped = isAtomic || !visitor.getExecutable().isSchemaAware();
        if (!isUntyped) {
            boolean maybeElement = th.relationship(itemType, NodeKindTest.ELEMENT) != TypeHierarchy.DISJOINT;
            boolean maybeAttribute = th.relationship(itemType, NodeKindTest.ATTRIBUTE) != TypeHierarchy.DISJOINT;
            isUntyped = !maybeElement && !maybeAttribute;
        }
        if (isSingleton) {
            if (isAtomic) {
                return select;
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    /**
    * Make an expression that extracts the first item of a sequence, after atomization
    */

    public static Expression makeFirstItem(Expression exp, StaticContext env) {
        final TypeHierarchy th = env.getConfiguration().getTypeHierarchy();
        if (!exp.getItemType(th).isAtomicType()) {
            exp = new Atomizer(exp, env.getConfiguration());
        }
        if (Cardinality.allowsMany(exp.getCardinality())) {
            exp = new FirstItemExpression(exp);
        }
        if (!th.isSubType(exp.getItemType(th), BuiltInAtomicType.STRING)) {
            exp = new AtomicSequenceConverter(exp, BuiltInAtomicType.STRING);
        }
        return exp;
    }
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Related Classes of net.sf.saxon.type.TypeHierarchy

  • net.sf.saxon.expr.ArithmeticExpression
  • net.sf.saxon.expr.ArithmeticExpression10
  • net.sf.saxon.expr.AtomicSequenceConverter
  • net.sf.saxon.expr.BooleanExpression
  • net.sf.saxon.expr.Calculator$AnyDivAny
  • net.sf.saxon.expr.Calculator$AnyIdivAny
  • net.sf.saxon.expr.Calculator$AnyMinusAny
  • net.sf.saxon.expr.Calculator$AnyModAny
  • net.sf.saxon.expr.Calculator$AnyPlusAny
  • net.sf.saxon.expr.Calculator$AnyTimesAny
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