Examples of org.pdf4j.saxon.expr.Expression.iterate()

org.pdf4j.saxon.expr.Expression.iterate()
Return an Iterator to iterate over the values of a sequence. The value of every expression can be regarded as a sequence, so this method is supported for all expressions. This default implementation handles iteration for expressions that return singleton values: for non-singleton expressions, the subclass must provide its own implementation. @exception org.pdf4j.saxon.trans.XPathException if any dynamic error occurs evaluating theexpression @param context supplies the context for evaluation @return a SequenceIterator that can be used to iterate over the resultof the expression

        exp = visitor.typeCheck(exp, Type.ITEM_TYPE);
        SlotManager map = staticContext.getConfiguration().makeSlotManager();
        ExpressionTool.allocateSlots(exp, 0, map);
        XPathContextMajor context = new XPathContextMajor(contextNode, staticContext.getExecutable());
        context.openStackFrame(map);
        SequenceIterator iterator = exp.iterate(context);
        ArrayList list = new ArrayList(20);
        while (true) {
            Item item = iterator.next();
            if (item == null) {
                return list;

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        exp = visitor.typeCheck(exp, Type.ITEM_TYPE);
        SlotManager map = staticContext.getConfiguration().makeSlotManager();
        ExpressionTool.allocateSlots(exp, 0, map);
        XPathContextMajor context = new XPathContextMajor(contextNode, staticContext.getExecutable());
        context.openStackFrame(map);
        SequenceIterator iterator = exp.iterate(context);
        Item item = iterator.next();
        if (item == null) {
            return null;
        } else {
            return Value.convertToJava(item);

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