Examples of org.pdf4j.saxon.value.Value

org.pdf4j.saxon.value.Value
A value is the result of an expression but it is also an expression in its own right. Note that every value can be regarded as a sequence - in many cases, a sequence of length one.

        operand0 = visitor.typeCheck(operand0, contextItemType);
        operand1 = visitor.typeCheck(operand1, contextItemType);
        // if both operands are known, pre-evaluate the expression
        try {
            if ((operand0 instanceof Literal) && (operand1 instanceof Literal)) {
                Value v = Value.asValue(evaluateItem(visitor.getStaticContext().makeEarlyEvaluationContext()));
                return Literal.makeLiteral(v);
            }
        } catch (XPathException err) {
            // if early evaluation fails, suppress the error: the value might
            // not be needed at run-time

View Full Code Here

        operand0 = visitor.optimize(operand0, contextItemType);
        operand1 = visitor.optimize(operand1, contextItemType);
        // if both operands are known, pre-evaluate the expression
        try {
            if ((operand0 instanceof Literal) && (operand1 instanceof Literal)) {
                Value v = Value.asValue(evaluateItem(visitor.getStaticContext().makeEarlyEvaluationContext()));
                return Literal.makeLiteral(v);
            }
        } catch (XPathException err) {
            // if early evaluation fails, suppress the error: the value might
            // not be needed at run-time

View Full Code Here

     public Expression simplify(ExpressionVisitor visitor) throws XPathException {
        config = visitor.getConfiguration();
        untyped = config.areAllNodesUntyped();
        operand = visitor.simplify(operand);
        if (operand instanceof Literal) {
            Value val = ((Literal)operand).getValue();
            if (val instanceof AtomicValue) {
                return operand;
            }
            SequenceIterator iter = val.iterate();
            while (true) {
                // if all items in the sequence are atomic (they generally will be, since this is
                // done at compile time), then return the sequence
                Item i = iter.next();
                if (i == null) {

View Full Code Here

      */


     public void checkPermittedContents(SchemaType parentType, StaticContext env, boolean whole) throws XPathException {
         // if the expression is a constant value, check that it is valid for the type
         if (select instanceof Literal) {
             Value selectValue = ((Literal)select).getValue();
             SimpleType stype = null;
             if (parentType instanceof SimpleType && whole) {
                 stype = (SimpleType)parentType;
             } else if (parentType instanceof ComplexType && ((ComplexType)parentType).isSimpleContent()) {
                 stype = ((ComplexType)parentType).getSimpleContentType();
             }
             if (whole && stype != null && !stype.isNamespaceSensitive()) {
                        // Can't validate namespace-sensitive content statically
                 ValidationFailure err = stype.validateContent(
                         selectValue.getStringValue(), null, env.getConfiguration().getNameChecker());
                 if (err != null) {
                     err.setLocator(this);
                     throw err.makeException();
                 }
                 return;
             }
             if (parentType instanceof ComplexType &&
                     !((ComplexType)parentType).isSimpleContent() &&
                     !((ComplexType)parentType).isMixedContent() &&
                     !Whitespace.isWhite(selectValue.getStringValue())) {
                 XPathException err = new XPathException("Complex type " + parentType.getDescription() +
                         " does not allow text content " +
                         Err.wrap(selectValue.getStringValue()));
                 err.setLocator(this);
                 err.setIsTypeError(true);
                 throw err;
             }
         }

View Full Code Here


    public SequenceIterator iterate(XPathContext context) throws XPathException {
        Controller controller = context.getController();
        if (controller.isTracing()) {
            String label = argument[1].evaluateAsString(context).toString();
            Value value = Value.asValue(ExpressionTool.eagerEvaluate(argument[0], context));
            notifyListener(label, value, context);
            return value.iterate();
        } else {
            PrintStream out = controller.getTraceFunctionDestination();
            if (out == null) {
                return argument[0].iterate(context);
            } else {

View Full Code Here

     */


    private void preEvaluateCollation(StaticContext env) throws XPathException {
        if (getNumberOfArguments() == getDetails().maxArguments) {
            final Expression collationExp = argument[getNumberOfArguments() - 1];
            final Value collationVal = (collationExp instanceof Literal ? ((Literal)collationExp).getValue() : null);
            if (collationVal instanceof AtomicValue) {
                // Collation is supplied as a constant
                String collationName = collationVal.getStringValue();
                URI collationURI;
                try {
                    collationURI = new URI(collationName);
                    if (!collationURI.isAbsolute()) {
                        saveBaseURI(env, true);

View Full Code Here

        return last != null && last.markTailCalls();
    }


    public Expression compile(Executable exec) throws XPathException {
        if (test instanceof Literal) {
            Value testVal = ((Literal)test).getValue();
            // condition known statically, so we only need compile the code if true.
            // This can happen with expressions such as test="function-available('abc')".
            try {
                if (testVal.effectiveBooleanValue()) {
                    return compileSequenceConstructor(exec, iterateAxis(Axis.CHILD), true);
//                    Block block = new Block();
//                    block.setLocationId(allocateLocationId(getSystemId(), getLineNumber()));
//                    compileChildren(exec, block, true);
//                    return block.simplify(getStaticContext());

View Full Code Here


    protected SequenceIterator call(ValueRepresentation[] argValues, XPathContext context) throws XPathException {
        List convertedArgs = new ArrayList(argValues.length);
        Configuration config = context.getConfiguration();
        for (int i=0; i<argValues.length; i++) {
            Value actual = Value.asValue(argValues[i]).reduce();
            PJConverter converter = PJConverter.allocate(
                    config, actual.getItemType(config.getTypeHierarchy()), actual.getCardinality(), Object.class);
            convertedArgs.add(converter.convert(actual, Object.class, context));
        }
        try {
            Object result = function.evaluate(convertedArgs);
            if (result == null) {

View Full Code Here

        }


    }


    private Object getTargetInstance(ValueRepresentation arg0, XPathContext context) throws XPathException {
        Value val = Value.asValue(arg0).reduce();
//        Configuration config = context.getConfiguration();
//        PJConverter converter = PJConverter.allocate(
//                config, val.getItemType(config.getTypeHierarchy()), val.getCardinality(), theClass);
        PJConverter converter = argumentConverters[0];
        return converter.convert(val, theClass, context);

View Full Code Here

            StructuredQName qName, SequenceType type, ValueRepresentation value, boolean external)
            throws XPathException {
        if (value == null && !external) {
            throw new NullPointerException("No initial value for declared variable");
        }
        Value val = Value.asValue(value);
        if (!type.matches(val, getConfiguration())) {
            throw new XPathException("Value of declared variable does not match its type");
        }
        GlobalVariableDefinition var = new GlobalVariableDefinition();
        var.setVariableQName(qName);

View Full Code Here

0 1

TOP

Related Classes of org.pdf4j.saxon.value.Value

org.pdf4j.saxon.event.SequenceReceiver

org.pdf4j.saxon.expr.Atomizer

org.pdf4j.saxon.expr.AxisAtomizingIterator

org.pdf4j.saxon.expr.BinaryExpression

org.pdf4j.saxon.expr.CastableExpression

org.pdf4j.saxon.expr.SingletonAtomizer

org.pdf4j.saxon.functions.CollatingFunction

org.pdf4j.saxon.functions.ExtensionFunctionCall

org.pdf4j.saxon.functions.Trace

org.pdf4j.saxon.instruct.ValueOf

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.