/*
 * File:           PagesScanner.java
 * Generated from: Pages.dtd
 * Date:           den 10 oktober 2002  21:19
 *
 * @author  h&m
 * @version generated by NetBeans XML module
 */
/**
 * This is a scanner of DOM tree.
 *
 * Example:
 * <pre>
 *     javax.xml.parsers.DocumentBuilderFactory builderFactory = javax.xml.parsers.DocumentBuilderFactory.newInstance();
 *     javax.xml.parsers.DocumentBuilder builder = builderFactory.newDocumentBuilder();
 *     org.w3c.dom.Document document = builder.parse (new org.xml.sax.InputSource (???));
 *     <font color="blue">PagesScanner scanner = new PagesScanner (document);</font>
 *     <font color="blue">scanner.visitDocument();</font>
 * </pre>
 *
 * @see org.w3c.dom.Document
 * @see org.w3c.dom.Element
 * @see org.w3c.dom.NamedNodeMap
 *
 */
public class PagesScanner {
    /** org.w3c.dom.Document document */
    org.w3c.dom.Document document;
    PRCalculator prc;
    
    /** Create new PagesScanner with org.w3c.dom.Document. */
    public PagesScanner(PRCalculator prc, org.w3c.dom.Document document) {
        this.prc = prc;
        this.document = document;
    }
    
    /** Scan through org.w3c.dom.Document document. */
    public void visitDocument() {
        org.w3c.dom.Element element = document.getDocumentElement();
        if ((element != null) && element.getTagName().equals("pagerank")) {
            visitElement_pagerank(element);
        }
        if ((element != null) && element.getTagName().equals("pages")) {
            visitElement_pages(element);
        }
        if ((element != null) && element.getTagName().equals("page")) {
            visitElement_page(element);
        }
        if ((element != null) && element.getTagName().equals("links")) {
            visitElement_links(element);
        }
        if ((element != null) && element.getTagName().equals("link")) {
            visitElement_link(element);
        }
    }
    
    /** Scan through org.w3c.dom.Element named pagerank. */
    void visitElement_pagerank(org.w3c.dom.Element element) { // <pagerank>
        // element.getValue();
        org.w3c.dom.NodeList nodes = element.getChildNodes();
        for (int i = 0; i < nodes.getLength(); i++) {
            org.w3c.dom.Node node = nodes.item(i);
            switch (node.getNodeType()) {
                case org.w3c.dom.Node.CDATA_SECTION_NODE:
                    // ((org.w3c.dom.CDATASection)node).getData();
                    break;
                case org.w3c.dom.Node.ELEMENT_NODE:
                    org.w3c.dom.Element nodeElement = (org.w3c.dom.Element)node;
                    if (nodeElement.getTagName().equals("pages")) {
                        visitElement_pages(nodeElement);
                    }
                    if (nodeElement.getTagName().equals("links")) {
                        visitElement_links(nodeElement);
                    }
                    break;
                case org.w3c.dom.Node.PROCESSING_INSTRUCTION_NODE:
                    // ((org.w3c.dom.ProcessingInstruction)node).getTarget();
                    // ((org.w3c.dom.ProcessingInstruction)node).getData();
                    break;
            }
        }
    }
    
    /** Scan through org.w3c.dom.Element named pages. */
    void visitElement_pages(org.w3c.dom.Element element) { // <pages>
        // element.getValue();
        org.w3c.dom.NodeList nodes = element.getChildNodes();
        for (int i = 0; i < nodes.getLength(); i++) {
            org.w3c.dom.Node node = nodes.item(i);
            switch (node.getNodeType()) {
                case org.w3c.dom.Node.CDATA_SECTION_NODE:
                    // ((org.w3c.dom.CDATASection)node).getData();
                    break;
                case org.w3c.dom.Node.ELEMENT_NODE:
                    org.w3c.dom.Element nodeElement = (org.w3c.dom.Element)node;
                    if (nodeElement.getTagName().equals("page")) {
                        visitElement_page(nodeElement);
                    }
                    break;
                case org.w3c.dom.Node.PROCESSING_INSTRUCTION_NODE:
                    // ((org.w3c.dom.ProcessingInstruction)node).getTarget();
                    // ((org.w3c.dom.ProcessingInstruction)node).getData();
                    break;
            }
        }
    }
    
    /** Scan through org.w3c.dom.Element named page. */
    void visitElement_page(org.w3c.dom.Element element) { // <page>
        // element.getValue();
        org.w3c.dom.NamedNodeMap attrs = element.getAttributes();
        for (int i = 0; i < attrs.getLength(); i++) {
            org.w3c.dom.Attr attr = (org.w3c.dom.Attr)attrs.item(i);
            if (attr.getName().equals("name")) { // <page name="???">
                prc.addPage(attr.getValue());
            }
        }
        org.w3c.dom.NodeList nodes = element.getChildNodes();
        for (int i = 0; i < nodes.getLength(); i++) {
            org.w3c.dom.Node node = nodes.item(i);
            switch (node.getNodeType()) {
                case org.w3c.dom.Node.CDATA_SECTION_NODE:
                    // ((org.w3c.dom.CDATASection)node).getData();
                    break;
                case org.w3c.dom.Node.ELEMENT_NODE:
                    org.w3c.dom.Element nodeElement = (org.w3c.dom.Element)node;
                    break;
                case org.w3c.dom.Node.PROCESSING_INSTRUCTION_NODE:
                    // ((org.w3c.dom.ProcessingInstruction)node).getTarget();
                    // ((org.w3c.dom.ProcessingInstruction)node).getData();
                    break;
            }
        }
    }
    
    /** Scan through org.w3c.dom.Element named links. */
    void visitElement_links(org.w3c.dom.Element element) { // <links>
        // element.getValue();
        org.w3c.dom.NodeList nodes = element.getChildNodes();
        for (int i = 0; i < nodes.getLength(); i++) {
            org.w3c.dom.Node node = nodes.item(i);
            switch (node.getNodeType()) {
                case org.w3c.dom.Node.CDATA_SECTION_NODE:
                    // ((org.w3c.dom.CDATASection)node).getData();
                    break;
                case org.w3c.dom.Node.ELEMENT_NODE:
                    org.w3c.dom.Element nodeElement = (org.w3c.dom.Element)node;
                    if (nodeElement.getTagName().equals("link")) {
                        visitElement_link(nodeElement);
                    }
                    break;
                case org.w3c.dom.Node.PROCESSING_INSTRUCTION_NODE:
                    // ((org.w3c.dom.ProcessingInstruction)node).getTarget();
                    // ((org.w3c.dom.ProcessingInstruction)node).getData();
                    break;
            }
        }
    }
    
    /** Scan through org.w3c.dom.Element named link. */
    void visitElement_link(org.w3c.dom.Element element) { // <link>
        // element.getValue();
        org.w3c.dom.NamedNodeMap attrs = element.getAttributes();
        org.w3c.dom.Attr from = (org.w3c.dom.Attr)attrs.item(0);
        org.w3c.dom.Attr to = (org.w3c.dom.Attr)attrs.item(1);
        prc.addIncomingPage(from.getValue(), to.getValue());
    }
    
    
}