Examples of net.sf.saxon.sxpath.XPathExpression.evaluateSingle()

Class net.sf.saxon.sxpath.XPathExpression

Examples of net.sf.saxon.sxpath.XPathExpression.evaluateSingle()

net.sf.saxon.sxpath.XPathExpression.evaluateSingle()
Execute the expression, returning the result as a single {@link net.sf.saxon.om.Item}If the result of the expression is a sequence containing more than one item, items after the first are discarded. If the result is an empty sequence, the method returns null. @param context the XPath dynamic context @return the first item in the result of the expression, or null

        try {
          s = convertToSource(doc);
            XPathEvaluator eval = new XPathEvaluator();
            // Wrap the string() function to force a string return             
            XPathExpression expr = eval.createExpression(xpath);
            Object o = expr.evaluateSingle(s);
            
            if(o == null) {
                return null;
            }

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                                presenter.close();
                                NodeInfo expressionTree = builder.getCurrentRoot();
                                XPathEvaluator xpe = new XPathEvaluator(saConfig);
                                XPathExpression exp = xpe.createExpression(assertion);
                                try {
                                    Boolean bv = (Boolean)exp.evaluateSingle(expressionTree);
                                    if (bv == null || !bv.booleanValue()) {
                                        log.println("** Optimization assertion failed");
                                        optimizationOK = false;
                                    }
                                } catch (Exception e) {

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            source = buildSource(xml, validationMode);
            if (initialContextPath != null) {
                DocumentInfo doc = config.buildDocument(source);
                XPathEvaluator xpe = new XPathEvaluator(config);
                XPathExpression expr = xpe.createExpression(initialContextPath);
                source = (NodeInfo)expr.evaluateSingle(doc);
            }
        }
        Templates sheet;
        try {
            Source styleSource;

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            ((PreparedStylesheet)sheet).explain(presenter);
            presenter.close();
            NodeInfo expressionTree = builder.getCurrentRoot();
            XPathEvaluator xpe = new XPathEvaluator(config);
            XPathExpression exp = xpe.createExpression(assertion);
            Boolean bv = (Boolean)exp.evaluateSingle(expressionTree);
            if (!bv.booleanValue()) {
                System.err.println("** Optimization assertion failed");
                presenter = new ExpressionPresenter(config);
                ((PreparedStylesheet)sheet).explain(presenter);
                presenter.close();

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            if (errorObject instanceof SingletonItem) {
                Item root = ((SingletonItem)errorObject).getItem();
                if ((root instanceof NodeInfo) && ((NodeInfo)root).getNodeKind() == Type.DOCUMENT) {
                    XPathEvaluator xpath = new XPathEvaluator();
                    XPathExpression exp = xpath.createExpression("/error/@module");
                    NodeInfo moduleAtt = (NodeInfo)exp.evaluateSingle((NodeInfo)root);
                    String module = (moduleAtt == null ? null : moduleAtt.getStringValue());
                    exp = xpath.createExpression("/error/@line");
                    NodeInfo lineAtt = (NodeInfo)exp.evaluateSingle((NodeInfo)root);
                    int line = (lineAtt == null ? -1 : Integer.parseInt(lineAtt.getStringValue()));
                    exp = xpath.createExpression("/error/@column");

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                    XPathEvaluator xpath = new XPathEvaluator();
                    XPathExpression exp = xpath.createExpression("/error/@module");
                    NodeInfo moduleAtt = (NodeInfo)exp.evaluateSingle((NodeInfo)root);
                    String module = (moduleAtt == null ? null : moduleAtt.getStringValue());
                    exp = xpath.createExpression("/error/@line");
                    NodeInfo lineAtt = (NodeInfo)exp.evaluateSingle((NodeInfo)root);
                    int line = (lineAtt == null ? -1 : Integer.parseInt(lineAtt.getStringValue()));
                    exp = xpath.createExpression("/error/@column");
                    NodeInfo columnAtt = (NodeInfo)exp.evaluateSingle((NodeInfo)root);
                    int column = (columnAtt == null ? -1 : Integer.parseInt(columnAtt.getStringValue()));
                    ExpressionLocation locator = new ExpressionLocation();

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                    String module = (moduleAtt == null ? null : moduleAtt.getStringValue());
                    exp = xpath.createExpression("/error/@line");
                    NodeInfo lineAtt = (NodeInfo)exp.evaluateSingle((NodeInfo)root);
                    int line = (lineAtt == null ? -1 : Integer.parseInt(lineAtt.getStringValue()));
                    exp = xpath.createExpression("/error/@column");
                    NodeInfo columnAtt = (NodeInfo)exp.evaluateSingle((NodeInfo)root);
                    int column = (columnAtt == null ? -1 : Integer.parseInt(columnAtt.getStringValue()));
                    ExpressionLocation locator = new ExpressionLocation();
                    locator.setSystemId(module);
                    locator.setLineNumber(line);
                    locator.setColumnNumber(column);

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        NodeInfo doc = config.buildDocument(new StreamSource(new File(sourceID).toURL().toString()));
        System.err.println("Source document built OK");
        net.sf.saxon.sxpath.XPathEvaluator xpath = new net.sf.saxon.sxpath.XPathEvaluator(config);
        XPathExpression xpe = xpath.createExpression("/*/*[1]");
        NodeInfo start = (NodeInfo)xpe.evaluateSingle(doc);


        Transformer transformer = templates.newTransformer();


        TinyBuilder builder = new TinyBuilder();
        transformer.transform(start, builder);

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            if (errorObject instanceof SingletonNode) {
                NodeInfo root = ((SingletonNode)errorObject).getNode();
                if (root.getNodeKind() == Type.DOCUMENT) {
                    XPathEvaluator xpath = new XPathEvaluator();
                    XPathExpression exp = xpath.createExpression("/error/@module");
                    NodeInfo moduleAtt = (NodeInfo)exp.evaluateSingle(root);
                    String module = (moduleAtt == null ? null : moduleAtt.getStringValue());
                    exp = xpath.createExpression("/error/@line");
                    NodeInfo lineAtt = (NodeInfo)exp.evaluateSingle(root);
                    int line = (lineAtt == null ? -1 : Integer.parseInt(lineAtt.getStringValue()));
                    exp = xpath.createExpression("/error/@column");

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                    XPathEvaluator xpath = new XPathEvaluator();
                    XPathExpression exp = xpath.createExpression("/error/@module");
                    NodeInfo moduleAtt = (NodeInfo)exp.evaluateSingle(root);
                    String module = (moduleAtt == null ? null : moduleAtt.getStringValue());
                    exp = xpath.createExpression("/error/@line");
                    NodeInfo lineAtt = (NodeInfo)exp.evaluateSingle(root);
                    int line = (lineAtt == null ? -1 : Integer.parseInt(lineAtt.getStringValue()));
                    exp = xpath.createExpression("/error/@column");
                    NodeInfo columnAtt = (NodeInfo)exp.evaluateSingle(root);
                    int column = (columnAtt == null ? -1 : Integer.parseInt(columnAtt.getStringValue()));
                    ExpressionLocation locator = new ExpressionLocation();

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