Examples of com.volantis.mcs.xml.xpath.XPath

com.volantis.mcs.xml.xpath.XPath
A set of ODOM XPath utilities are required that will allow, amongst other things:
- access to the string XPath representation required to access a given (O/J)DOM element, attribute or text node either as an absolute path in the document or relative to an ancestor (O/J)DOM element.
- creation of the (O/J)DOM elements and attribute/text node missing within a given (O/J)DOM hierarchy from a given absolute or relative XPath string
- access to an existing (O/J)DOM element, attribute or text node using an absolute or relative path within a given document/base element.

        // Assume the the data on the item is the Element.
        Element element = (Element) item.getData();
        if (element != null) {
            // Look for problem markers associated with this element
            // from which to obtain the tool tip text.
            XPath xPath = new ODOMXPath(element);
            try {
                IMarker markers [] = PolicyUtils.findProblemMarkers(resource,
                        xPath);
                if (markers.length > 0) {
                    toolTipText = (String) markers[0].

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        StringBuffer xpathBuffer = new StringBuffer();
        xpathBuffer.append("//").
                append(MCSNamespace.DEVICE_HIERARCHY.getPrefix()).
                append(':').
                append("device[@name]");  //$NON-NLS-1$
        XPath xpath = new XPath(xpathBuffer.toString(),
                new Namespace[]{MCSNamespace.DEVICE_HIERARCHY});


        List matches = new ArrayList();


        try {
            // Apply the XPath expression to the root of the document provided
            List nodes = xpath.selectNodes(root);


            if (nodes != null) {
                // Iterate over any nodes selected by the XPath
                for (Iterator i = nodes.iterator(); i.hasNext(); /**/) {
                    Object current = i.next();

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        StringBuffer xpathBuffer = new StringBuffer();
        xpathBuffer.append("//").
                append(MCSNamespace.DEVICE_IDENTIFICATION.getPrefix()).
                append(':').
                append(DeviceRepositorySchemaConstants.DEVICE_ELEMENT_NAME);
        XPath xpath = new XPath(xpathBuffer.toString(),
                new Namespace[]{MCSNamespace.DEVICE_IDENTIFICATION});


        List matches = new ArrayList();


        try {
            // Apply the XPath expression to the root of the document provided
            List nodes = xpath.selectNodes(root);


            if (nodes != null) {
                // Iterate over the devices selected by the XPath. For each
                // device check its patterns agains the regular expression. If
                // there is a match then add the device to the list of matches.

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                    errorReporter, min);
            BigDecimal maxDecimal = getBigDecimal(maxString, element,
                    errorReporter, max);
            if (minDecimal != null && maxDecimal != null &&
                    minDecimal.compareTo(maxDecimal) == 1) {
                ErrorDetails details = new ErrorDetails(element, new XPath(element),
                        null, FaultTypes.MIN_RANGE_MORE_THAN_MAX, null, null);
                errorReporter.reportError(details);
            }
        }
    }

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            ErrorReporter errorReporter, Attribute attribute) {
        BigDecimal result = null;
        try {
            result = new BigDecimal(value);
        } catch (NumberFormatException e) {
            ErrorDetails details = new ErrorDetails(element, new XPath(attribute),
                    null, FaultTypes.NOT_A_NUMBER, value, null);
            errorReporter.reportError(details);
        }
        return result;
    }

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            ODOMElement sourceElement = elements[0];
            ODOMElement targetElement = getCurrentTarget(event);
            if (targetElement == sourceElement) {
                event.detail = DND.DROP_NONE;
            } else {
                XPath srcXPath = new XPath(actionDetails.getElement(0));
                boolean canReplace = ActionSupport.canReplace(sourceElement,
                        targetElement, srcXPath);
                if (!targetElement.getName().
                        equals(FormatType.EMPTY.getElementName())) {
                    boolean canSwap = event.detail == DND.DROP_MOVE;

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        xPathString.append("ancestor-or-self::").
                append(namespace.getPrefix()).
                append(":").
                append(DeviceRepositorySchemaConstants.DEVICE_ELEMENT_NAME);


        XPath deviceXPath = new XPath(xPathString.toString(), new Namespace[]{
                namespace});
        Element device = deviceXPath.selectSingleElement(invalidElement);


        if (device == null) {
            throw new XPathException(
                    "Device element was null when selected based on element: " +
                            invalidElement.toString());

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        xpathString.append("ancestor-or-self::").
                append(MCSNamespace.DEVICE.getPrefix()).
                append(":").
                append(DeviceRepositorySchemaConstants.POLICY_ELEMENT_NAME);


        XPath policyXPath = new XPath(xpathString.toString(), new Namespace[]{
                MCSNamespace.DEVICE});
        Element policy = policyXPath.selectSingleElement(invalidElement);


        if (policy == null) {
            throw new XPathException(
                    "Selected element was null when selected based on element: " +
                            invalidElement.toString());

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                            POLICY_DEFINITION_STRUCTURE_ELEMENT_NAME)
                  .append("/ns:")
                  .append(DeviceRepositorySchemaConstants.
                            POLICY_DEFINITION_FIELD_ELEMENT_NAME);
        // create an XPath that can be used to retrieve the field elements
        XPath xpath = new XPath(pathBuffer.toString(),
                                new Namespace[] {
                                    Namespace.getNamespace(
                                                "ns",
                                                typeElement.getNamespaceURI())
                                });


        try {
            List fields = xpath.selectNodes(typeElement);
            // we must have at least one field
            if (fields.isEmpty()) {
                throw new IllegalStateException("The structure element must " +
                                                "contain at least one field");
            }

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        StringBuffer buffer =
                new StringBuffer(element.getNamespacePrefix().length() + 1 +
                rowElementName.length());
        buffer.append(element.getNamespacePrefix()).append(":").
                append(rowElementName);
        XPath rowsXPath = new XPath(buffer.toString(),
                new Namespace[]{element.getNamespace()});


        List gridRowFormats;
        try {
            gridRowFormats =
                    rowsXPath.selectNodes(element);
        } catch (XPathException e) {
            throw new UndeclaredThrowableException(e);
        }


        return gridRowFormats;

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