Examples of org.pdf4j.saxon.om.SequenceIterator

org.pdf4j.saxon.om.SequenceIterator
A SequenceIterator is used to iterate over any XPath 2 sequence (of values or nodes). To get the next item in a sequence, call next(); if this returns null, you've reached the end of the sequence.
A SequenceIterator keeps track of the current Item and the current position. The objects returned by the SequenceIterator will always be either nodes (class NodeInfo) or singleton values (class AtomicValue): these are represented collectively by the interface Item.
This interface forms part of the public Saxon API. The JavaDoc "since" flag is used from release 8.4 onwards to indicate methods that are considered to be a stable part of the API. Methods without a "since" flag should not be regarded as a stable part of the API.
Note that the stability of this interface applies to classes that use the interface, not to classes that implement it. The interface may be extended in future to add new methods. @author Michael H. Kay @since 8.4

    * @param c The context for evaluation
    * @return a SequenceIterator representing the union of the two operands
    */


    public SequenceIterator iterate(final XPathContext c) throws XPathException {
        SequenceIterator i1 = operand0.iterate(c);
        //return Type.isNodeType(getItemType()) && isSingleton();
        // this is a sufficient condition, but other expressions override this method
        if ((operand0.getSpecialProperties() & StaticProperty.ORDERED_NODESET) == 0) {
            i1 = new DocumentOrderIterator(i1, GlobalOrderComparer.getInstance());
        }
        SequenceIterator i2 = operand1.iterate(c);
        //return Type.isNodeType(getItemType()) && isSingleton();
        // this is a sufficient condition, but other expressions override this method
        if ((operand1.getSpecialProperties() & StaticProperty.ORDERED_NODESET) == 0) {
            i2 = new DocumentOrderIterator(i2, GlobalOrderComparer.getInstance());
        }

View Full Code Here

    public AtomicValue getCurrentGroupingKey() {
        return (AtomicValue)nodeKeys[(position-1)*recordSize+comparators.length+2];
    }


    public SequenceIterator iterateCurrentGroup() throws XPathException {
        SequenceIterator iter =
                (SequenceIterator)nodeKeys[(position-1)*recordSize+comparators.length+3];
        return iter.getAnother();
    }

View Full Code Here

        return BooleanValue.get(effectiveBooleanValue(context));
    }


    public boolean effectiveBooleanValue(XPathContext context) throws XPathException {
        int count = 0;
        SequenceIterator iter = operand.iterate(context);
        while (true) {
            Item item = iter.next();
            if (item == null) {
                break;
            }
            if (item instanceof NodeInfo) {
                Value atomizedValue = ((NodeInfo)item).atomize();

View Full Code Here

    /**
    * Iterate over the sequence of values
    */


    public SequenceIterator iterate(final XPathContext context) throws XPathException {
        SequenceIterator base = operand.iterate(context);
        ItemMappingFunction converter = new ItemMappingFunction() {
            public Item map(Item item) throws XPathException {
                return ((AtomicValue)item).convert(requiredPrimitiveType, true, context).asAtomic();
            }
        };

View Full Code Here

            return StaticProperty.EMPTY;
        } else if (value instanceof AtomicValue) {
            return StaticProperty.EXACTLY_ONE;
        }
        try {
            SequenceIterator iter = value.iterate();
            Item next = iter.next();
            if (next == null) {
                return StaticProperty.EMPTY;
            } else {
                if (iter.next() != null) {
                    return StaticProperty.ALLOWS_ONE_OR_MORE;
                } else {
                    return StaticProperty.EXACTLY_ONE;
                }
            }

View Full Code Here

      * @param context The dynamic context, giving access to the current node,
      * the current variables, etc.
      */


    public void process(XPathContext context) throws XPathException {
        SequenceIterator iter = value.iterate();
        SequenceReceiver out = context.getReceiver();
        while (true) {
            Item it = iter.next();
            if (it==null) break;
            out.append(it, 0, NodeInfo.ALL_NAMESPACES);
        }
    }

View Full Code Here

            out.emitAttribute("type", ((AtomicValue)value).getTypeLabel().getDisplayName());
        } else {
            try {
                out.emitAttribute("count", value.getLength()+"");
                if (value.getLength() < 20) {
                    SequenceIterator iter = iterate(null);
                    while (true) {
                        Item it = iter.next();
                        if (it == null) {
                            break;
                        }
                        if (it instanceof NodeInfo) {
                            out.startElement("node");

View Full Code Here

    */


    public Item evaluateItem(XPathContext context) throws XPathException {
        int found = 0;
        Item result = null;
        SequenceIterator iter = operand.iterate(context);
        while (true) {
            Item item = iter.next();
            if (item == null) {
                break;
            }
            if (item instanceof AtomicValue) {
                if (found++ > 0) {

View Full Code Here

            return this;
        }
    }


    public SequenceIterator iterate(XPathContext context) throws XPathException {
        SequenceIterator iter = new SortedTupleIterator(context, select.iterate(context), comparators);
        return new MappingIterator(iter, TupleUnwrapper.getInstance());
    }

View Full Code Here

    /**
    * Evaluate the expression as a boolean
    */


    public boolean effectiveBooleanValue(XPathContext context) throws XPathException {
        SequenceIterator iter = operand.iterate(context);
        int count = 0;
        while (true) {
            Item item = iter.next();
            if (item == null) break;
            count++;
            if (!targetType.matchesItem(item, false, context.getConfiguration())) {
                return false;
            }

View Full Code Here

0 1 2 3 4 5 6

TOP

Related Classes of org.pdf4j.saxon.om.SequenceIterator

org.pdf4j.saxon.dom.DOMNodeList

org.pdf4j.saxon.evpull.Decomposer

org.pdf4j.saxon.expr.AtomicMappingExpression

org.pdf4j.saxon.expr.AtomicSequenceConverter

org.pdf4j.saxon.expr.CardinalityChecker

org.pdf4j.saxon.expr.CastableExpression

org.pdf4j.saxon.expr.ContextMappingIterator

org.pdf4j.saxon.expr.FilterIterator

org.pdf4j.saxon.expr.FirstItemExpression

org.pdf4j.saxon.expr.ForExpression

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.