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/*
 * Enhydra Java Application Server Project
 * 
 * The contents of this file are subject to the Enhydra Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License on
 * the Enhydra web site ( http://www.enhydra.org/ ).
 * 
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See 
 * the License for the specific terms governing rights and limitations
 * under the License.
 * 
 * The Initial Developer of the Enhydra Application Server is Lutris
 * Technologies, Inc. The Enhydra Application Server and portions created
 * by Lutris Technologies, Inc. are Copyright Lutris Technologies, Inc.
 * All Rights Reserved.
 * 
 * Contributor(s):
 * 
 * $Id: PrintInfo.java,v 1.2 2005/01/26 08:29:24 jkjome Exp $
 */

package org.enhydra.xml.xmlc.compiler;

import java.io.PrintWriter;
import java.util.Vector;

import org.enhydra.xml.xmlc.dom.XMLCDocument;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

/**
 * Gather and print information about an document.
 */
class PrintInfo {
    /**
     * Table URLs.
     */
    private Vector urls = new Vector();

    /**
     * Table of element ids.
     */
    private Vector ids = new Vector();
    
    /**
     * Construct document info from document.
     */
    public PrintInfo(Document doc, XMLCDocument xmlcDoc) {
        getNodeInfo(doc, xmlcDoc);
    }

    /**
     * Append URLs from an element.
     */
    private void getElementURLs(Element element, XMLCDocument xmlcDoc) {
        NamedNodeMap attrs = element.getAttributes();
        if (attrs != null) {
            for (int idx = 0; idx < attrs.getLength(); idx++) {
                Attr attr = (Attr)attrs.item(idx);
                if (xmlcDoc.isURLAttribute(element, attr.getNodeName())) {
                    urls.addElement(attr.getValue());
                }
            }
        }
    }

    /**
     * Recursively scan nodes nodes and accumulate information.
     */
    private void getNodeInfo(Node node, XMLCDocument xmlcDoc) {
        if (node instanceof Element) {
            Element elem = (Element)node;
            getElementURLs(elem, xmlcDoc);
            String id = xmlcDoc.getElementId(elem);
            if ((id != null) && (id.length() > 0)) {
                ids.addElement(id + " => "
                               + xmlcDoc.nodeClassToInterface(node));
            }
        }

        for (Node child = node.getFirstChild(); child != null;
             child = child.getNextSibling()) {
            getNodeInfo(child, xmlcDoc);
        }
    }

    /**
     * Print document information.
     */
    protected void printInfo(PrintWriter out) {
        int idx;

        out.println("Element IDs:");
        for (idx = 0; idx < ids.size(); idx++) {
            out.println("    " + ids.elementAt(idx));
        }
        out.println("Document URLs:");
        for (idx = 0; idx < urls.size(); idx++) {
            out.println("    " + urls.elementAt(idx));
        }
    }
}