jdomadapter.java

来自「Java Pattern Oriented Framework (Jt) 是为了」· Java 代码 · 共 762 行 · 第 1/2 页

        return (element);
    }   

    
    
    private Element insertElement (String parentPath, Element element, Integer Index) {
        Element parent;

        if (parentPath == null) {

            return (null);
        }
        
        if (Index == null)
            return null;

        if (element == null) {
            handleError ("insertElement: invalid element (null)");
            return null;        
        }
        parent = findElement (parentPath);

        if (parent == null) {
            handleError ("insertElement: parent not found: " + parentPath);
            return (null);
        }

        parent.addContent(Index.intValue(), element);

        return (element);
    }      
    
    
    private Object elementToBean (Element elem, Object obj) {
        JtMessage msg = new JtMessage (JtFactory.JtGET_ATTRIBUTES);
        JtMessage msg1 = new JtMessage (JtFactory.JtCREATE_OBJECT);     
        JtFactory factory = new JtFactory ();
        JtHashTable attributes;
        JtIterator iterator;
        String attName;
        String attValue;
        Object instance;
        
        if (elem == null || obj == null)
            return (null);
              
        msg1.setMsgContent(obj.getClass().getName());
        
        instance = factory.processMessage(msg1);
        
        if (instance == null)
            return (null);
        
        factory.setStopClass(JtObject.class);
        msg.setMsgContent(instance);
        attributes =  (JtHashTable) factory.processMessage(msg);
        
        if (attributes == null)
            return (null);
        
        iterator = (JtIterator) attributes.processMessage 
        (new JtMessage (JtHashTable.JtGET_KEYS));
        
        if (iterator == null)
            return (null);
        
        for (;;) {
            attName = (String) iterator.processMessage(new JtMessage (JtIterator.JtNEXT));
            if (attName == null)
                break;
            attValue = elem.getAttributeValue(attName);
            if (attValue != null) {
                factory.setValue (instance, attName, attValue);
            }
        }
        
        return (instance);
    }
    
    void attToString (List atts, StringBuffer buffer) {
        Iterator iterator;
        Attribute attr;

        if (buffer == null || atts == null)
            return;
        iterator = atts.iterator();

        if (iterator == null)
            return;

        for (;;) {
            if (!iterator.hasNext())
                break;
            attr = (Attribute) iterator.next();

            buffer.append(" " + attr.getName() + "=\"" + attr.getValue() + "\"");
        }    

    }

    /*
    void elementToString (Element element, StringBuffer buffer, int level) {
        List atts;
        List children;
        int size;
        Namespace nspace;
        String eName;
        String text;

        if (element == null)
            return;

        nspace = element.getNamespace();


        if (nspace == null || nspace.getPrefix() == null || "".equals (nspace.getPrefix()))
            eName = element.getName();
        else
            eName = nspace.getPrefix() + ":" + element.getName(); 

        for (int i = 0; i < level; i++)
            buffer.append("  ");

        buffer.append("<" + eName);

        atts = element.getAttributes();

        if (atts != null)
            attToString (atts, buffer);

        text = element.getTextTrim(); 
        children = element.getChildren();

        if ((children.size() == 0) && (text == null || text.equals("")))
            buffer.append(" />\n");
        else {
            buffer.append(">");
            
            
            if (text != null && !text.equals(""))
                buffer.append(text);

            //if (!"td".equals (eName))
            
            if (children.size() != 0)
                buffer.append("\n");
        }

        //text = element.getTextTrim();
        //if (text != null && !text.equals(""))
        //    buffer.append(text);


        children = element.getChildren();

        if (children.size() != 0) {


            size = children.size ();

            for (int i = 0; i < size; i++) {
                element = (Element) children.get(i);
                //if ("td".equals (eName))
                //    elementToString (element, buffer, 0);    
                //else
                    elementToString (element, buffer, level + 1);  

            }
        }
        if (!((children.size() == 0) && (text == null || text.equals("")))) {
            //if (!"td".equals (eName))
            
            if (children.size() != 0)
                for (int i = 0; i < level; i++)
                    buffer.append("  ");
            buffer.append("</" + eName + ">\n");
        }    

    }
    */
    String xmlToString () {
        //StringBuffer buffer = new StringBuffer ();

        //Element element;

        if (doc == null)
            return (null);

        //element = doc.getRootElement ();
        //if (element == null)
        //    return (null);
        
        return (outputter.outputString (doc));

        //elementToString (element, buffer, 0);

        //return (buffer.toString ());
    }

    /**
     * Process object messages.
     * <ul>
     * <li>READ_FILE - Reads a XML file. The attribute path specifies the file to be read.
     * <li>FIND_ELEMENT - Finds the element specified by msgContent.
     * <li>REPLACE_ELEMENT - Replaces the text associated with element specified by msgContent.
     * msgData contains the new text.
     * <li>ADD_ELEMENT - Adds the element specified by msgContent. msgData specifies
     * the parent element.
     * <li>ADD_CHILD - Adds the element specified by msgData (as a child). msgContent specifies
     * the parent element.
     * <li>CLONE_ELEMENT - Clones the element specified by msgContent.
     * <li>SAVE_FILE - Saves XML content to the file specified by the path attribute.
     * <li>GET_CHILDREN - Returns the list of all child elements for the element specified by msgContent.
     * </ul>
     */

    public Object processMessage (Object message) {

        String msgid = null;
        JtMessage msg = (JtMessage) message;
        Object content;
        Object data;


        if (msg == null)
            return null;

        msgid = (String) msg.getMsgId ();

        if (msgid == null)
            return null;

        if (msg == null || msg.getMsgId () == null) {
            handleError ("Invalid message");	
            return null;
        }  


        if (!initialized) {
            initializeAdapter (); // check
            initialized = true;
        }  

        content = msg.getMsgContent();
        data = msg.getMsgData ();

        if (msgid.equals (JDOMAdapter.READ_FILE))
            return readFile ();
        
        if (msgid.equals (JDOMAdapter.READ_STREAM))
            return readStream ();

        if (msgid.equals (JDOMAdapter.FIND_ELEMENT))
            return findElement ((String) msg.getMsgContent());
        
        if (msgid.equals (JDOMAdapter.FIND_ELEMENTS))
            return findElements ((String) msg.getMsgContent());

        if (msgid.equals(JDOMAdapter.ADD_ELEMENT)) {
            addElement ((String) data, (Element) content);
            return (null);     
        }
        
        if (msgid.equals(JDOMAdapter.ADD_CHILD)) {
            addChild ((Element) content, (Element) data);
            return (null);     
        }
        
        if (msgid.equals(JDOMAdapter.INSERT_ELEMENT)) {
            insertElement ((String) data, (Element) content,
                    (Integer) msg.getMsgAttachment());
            return (null);     
        }

        if (msgid.equals (JDOMAdapter.REPLACE_ELEMENT))
            return replaceElement ((String) msg.getMsgContent(),
                    (String) msg.getMsgData());

        if (msgid.equals (JDOMAdapter.GET_CHILDREN))
            return getChildren ((String) msg.getMsgContent());

        if (msgid.equals (JDOMAdapter.CLONE_ELEMENT))
            return cloneElement ((String) msg.getMsgContent()); 
               
        if (msgid.equals (JDOMAdapter.ELEMENT_TO_BEAN)) {
            return elementToBean ((Element) msg.getMsgContent(),
                    (Object) msg.getMsgData ()); 
        }    

        if (msgid.equals(JDOMAdapter.STRING_TO_XML))
            return (stringToXML ((String) msg.getMsgContent())); 

        if (msgid.equals(JDOMAdapter.XML_TO_STRING))
            return (xmlToString ()); 

        if (msgid.equals(JDOMAdapter.SAVE_FILE)) {
            saveFile ();
            return (null);     
        }
        return (super.processMessage (message));

    }

    /**
     * Returns the path to the XML file.
     */  

    public String getPath() {
        return path;
    }

    /**
     * Specifies the path to the XML file.
     */  

    public void setPath(String path) {
        this.path = path;
    }



    /**
     * Demonstrates the messages processed by this class.
     */

    public static void main(String[] args) {

        JtMessage msg = new JtMessage ();
        JtFactory factory = new JtFactory ();
        JDOMAdapter adapter;
        Element element = new Element ("Root");
        DocType docType;

        adapter = (JDOMAdapter) factory.createObject(JDOMAdapter.JtCLASS_NAME);

        // Add elements
        
        msg.setMsgId(JDOMAdapter.ADD_ELEMENT);
        msg.setMsgContent (element);
        factory.sendMessage(adapter, msg);

        element = new Element ("class");
        element.setAttribute("name", "Jt.Object");
        msg.setMsgContent (element);
        msg.setMsgData ("Root");
        factory.sendMessage(adapter, msg);  

        element = new Element ("id");
        element.setAttribute("name", "email");
        msg.setMsgContent (element);
        msg.setMsgData ("Root/class");
        factory.sendMessage(adapter, msg);  

        element = new Element ("property");
        element.setAttribute("name", "firstname");
        msg.setMsgContent (element);
        msg.setMsgData ("Root/class");
        factory.sendMessage(adapter, msg);  
        
        docType = new DocType ("hibernate-mapping", 
                "-//Hibernate/Hibernate Mapping DTD 3.0//EN",
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd");

        adapter.setDocType(docType);

        //msg.setMsgId(new Integer (JdomAdapter.READ_FILE));
        //output = (String) adapter.processMessage(msg);
        System.out.println (adapter.getContent()); 

        //msg = new JtMessage (JdomAdapter.SAVE_FILE);

        //adapter.processMessage(msg); // Save the file 


    }




}