xmlportlets.java

java 写的一个新闻发布系统

            Properties oprops = new Properties();
            oprops.put("method", "html");
            oprops.put("indent-amount", "2");
            serializer.setOutputProperties(oprops);
            FileOutputStream fileStream = new FileOutputStream(destinationFileName);
            serializer.transform(new DOMSource(xmlDoc),
                             new StreamResult(fileStream));

        } catch ( Throwable t ){
            throw new JahiaException(  "XMLPortlets",
                                        "Exception " + t.getMessage(),
                                        JahiaException.ERROR,
                                        JahiaException.SERVICE_ERROR);
        }

    }


    //--------------------------------------------------------------------------
    /**
     * Processes through all the parameter tags of a given node to find the value of a certain named parameter
     *
     */
    public String getParameterValue(Node paramParent, String parameterName) throws JahiaException {
    if (!paramParent.hasChildNodes()) {
        throw new JahiaException("No parameters available on portlet XML tag",
                     "Parent has no children at all",
                     JahiaException.CRITICAL,
                     JahiaException.CONFIG_ERROR);
    }
    Node curNode = paramParent.getFirstChild();
    while (curNode != null) {
        // let's go through all the children nodes
        if (curNode.getNodeType() == Node.ELEMENT_NODE) {
        if (curNode.getNodeName().equalsIgnoreCase(PARAMETER_TAG)) {
            // we have found a parameter tag, let's check further for match of param name
            NamedNodeMap attrib = curNode.getAttributes();
            Node paramAttrib = attrib.getNamedItem(PARAMETER_TAG_NAME_ATTRIBUTE);
            if (paramAttrib != null) {
            if (paramAttrib.getNodeValue().equalsIgnoreCase(parameterName)) {
                // we found the parameter
                // we must now extract value of text node below this node.
                Node textNode = curNode.getFirstChild();
                if (textNode.getNodeType() == Node.TEXT_NODE) {
                return textNode.getNodeValue();
                } else {
                throw new JahiaException(ERROR_READING_PLML_FILE_MSG,
                             "Value of parameter is not in correct format, should only be text",
                             JahiaException.CRITICAL,
                             JahiaException.CONFIG_ERROR);
                }
            }
            } else {
            throw new JahiaException(ERROR_READING_PLML_FILE_MSG,
                         "No attribute name found on parameter !",
                         JahiaException.CRITICAL,
                         JahiaException.CONFIG_ERROR);
            }
        }
        } else {
        // we just ignore other type of tags
        }
        curNode = curNode.getNextSibling();
    }
    throw new JahiaException(ERROR_READING_PLML_FILE_MSG,
                 "No parameter with name "+ parameterName +" found !",
                 JahiaException.CRITICAL,
                 JahiaException.CONFIG_ERROR);

    } // end getParameterValue()


    //--------------------------------------------------------------------------
    /**
     * Find the value of a certain named attribute
     *
     */
    public String getAttributeValue(Node paramParent, String attributeName) throws JahiaException {

    NamedNodeMap attrib = paramParent.getAttributes();
    Node paramAttrib = attrib.getNamedItem(attributeName);
    return paramAttrib.getNodeValue();

    } // end getAttributeValue()


    //--------------------------------------------------------------------------
    /**
     * Retrieves a column count for the specified page
     *
     * @author Jerome Bedat
     *
     */
    public int getColumnCount() throws JahiaException {

    MaxColumn  = 0;
    boolean isPortletGroupNode = false;

    portletgroupNode = plmlNode.getFirstChild();

    try {
        while (portletgroupNode != null) {
            if (portletgroupNode.getNodeType() == Node.ELEMENT_NODE && portletgroupNode.getNodeName().equalsIgnoreCase(PORTLETLIST_TAG)) {
                if (Integer.parseInt(getParameterValue(portletgroupNode, "page_id")) == thePageID) {
                    isPortletGroupNode = true;
                    Node portletNode = portletgroupNode.getFirstChild();
                    while (portletNode != null) {
                        // we are going through the portletgroup tags which represent list of portlets
                        if (portletNode.getNodeType() == Node.ELEMENT_NODE && portletNode.getNodeName().equalsIgnoreCase(PORTLET_TAG)) {
                            // we are now on a PORTLET tag
                            if (Integer.parseInt(getParameterValue(portletNode, "column_position")) > MaxColumn) { MaxColumn = Integer.parseInt(getParameterValue(portletNode, "column_position")); }
                        }

                        portletNode = portletNode.getNextSibling();
                    }
                }
            }
            portletgroupNode = portletgroupNode.getNextSibling();
        }
    } catch (NumberFormatException n) {
        throw new JahiaException(ERROR_READING_PLML_FILE_MSG,
                                "Invalid Integer !!!",
                                JahiaException.CRITICAL,
                                JahiaException.CONFIG_ERROR);
    }

    if (!isPortletGroupNode) {
        addPortletGroup();
        getColumnCount();
    }
    return MaxColumn;
    } // end getColumnCount()


    //--------------------------------------------------------------------------
    /**
     * Retrieves a portlet settings
     *
     * @author Jerome Bedat
     *
     */
    public PortletObj getPortlet(int thePortletID) throws JahiaException {

    PortletObj thePortlet = null;
    boolean isPortletGroupNode = false;

    portletgroupNode = plmlNode.getFirstChild();

    try {
        while (portletgroupNode != null) {
            if (portletgroupNode.getNodeType() == Node.ELEMENT_NODE && portletgroupNode.getNodeName().equalsIgnoreCase(PORTLETLIST_TAG)) {
                if (Integer.parseInt(getParameterValue(portletgroupNode, "page_id")) == thePageID) {
                    isPortletGroupNode = true;
                    Node portletNode = portletgroupNode.getFirstChild();
                    while (portletNode != null) {
                        // we are going through the portletgroup tags which represent list of portlets
                        if (portletNode.getNodeType() == Node.ELEMENT_NODE && portletNode.getNodeName().equalsIgnoreCase(PORTLET_TAG)) {
                            // we are now on a PORTLET tag
                            paramAttrNode = getAttributeValue(portletNode, PARAMETER_TAG_ID_ATTRIBUTE);
                            if (Integer.parseInt(paramAttrNode) == thePortletID) {
                                thePortlet = new PortletObj(Integer.parseInt(paramAttrNode),
                                                            Integer.parseInt(getParameterValue(portletNode, "source_id")),
                                                            Integer.parseInt(getParameterValue(portletNode, "active")),
                                                            getParameterValue(portletNode, "title"),
                                                            getParameterValue(portletNode, "icon_url"),
                                                            getParameterValue(portletNode, "bgcolor"),
                                                            getParameterValue(portletNode, "bgimage_url"),
                                                            getParameterValue(portletNode, "font"),
                                                            getParameterValue(portletNode, "fontsize"),
                                                            getParameterValue(portletNode, "fontcolor"),
                                                            Integer.parseInt(getParameterValue(portletNode, "skin_id")),
                                                            Integer.parseInt(getParameterValue(portletNode, "scrollable")),
                                                            Integer.parseInt(getParameterValue(portletNode, "resizable")),
                                                            Integer.parseInt(getParameterValue(portletNode, "fixed")),
                                                            Integer.parseInt(getParameterValue(portletNode, "innerspace")),
                                                            Integer.parseInt(getParameterValue(portletNode, "x")),
                                                            Integer.parseInt(getParameterValue(portletNode, "y")),
                                                            Integer.parseInt(getParameterValue(portletNode, "w")),
                                                            Integer.parseInt(getParameterValue(portletNode, "h")),
                                                            Integer.parseInt(getParameterValue(portletNode, "column_position")),
                                                            Integer.parseInt(getParameterValue(portletNode, "row_position")));
                                break;
                            }
                        }
                        portletNode = portletNode.getNextSibling();
                    }
                    break;
                }
            }
            portletgroupNode = portletgroupNode.getNextSibling();

        }
    } catch (NumberFormatException n) {
        throw new JahiaException(ERROR_READING_PLML_FILE_MSG,
                                "Invalid Integer !!!",
                                JahiaException.CRITICAL,
                                JahiaException.CONFIG_ERROR);
    }

    if (!isPortletGroupNode) {
        addPortletGroup();
        getPortlet(thePortletID);
    }
    return thePortlet;
    } // end getPortlet()


    //--------------------------------------------------------------------------
    /**
     * Retrieves a list of portlet settings
     *
     * @author Jerome Bedat
     *
     */
    public Vector getPortletList() throws JahiaException {

    thePortletList = new Vector();
    boolean isPortletGroupNode = false;

    portletgroupNode = plmlNode.getFirstChild();

    try {
        while (portletgroupNode != null) {
            if (portletgroupNode.getNodeType() == Node.ELEMENT_NODE && portletgroupNode.getNodeName().equalsIgnoreCase(PORTLETLIST_TAG)) {
                if (Integer.parseInt(getParameterValue(portletgroupNode, "page_id")) == thePageID) {
                    isPortletGroupNode = true;
                    Node portletNode = portletgroupNode.getFirstChild();
                    while (portletNode != null) {
                        // we are going through the portletgroup tags which represent list of portlets
                        if (portletNode.getNodeType() == Node.ELEMENT_NODE && portletNode.getNodeName().equalsIgnoreCase(PORTLET_TAG)) {
                            // we are now on a PORTLET tag
                            paramAttrNode = getAttributeValue(portletNode, PARAMETER_TAG_ID_ATTRIBUTE);
                            thePortletList.addElement(new PortletObj(Integer.parseInt(paramAttrNode),
                                                                    Integer.parseInt(getParameterValue(portletNode, "source_id")),
                                                                    Integer.parseInt(getParameterValue(portletNode, "active")),