source: trunk/gsdl3/src/java/org/greenstone/gsdl3/core/NZDLReceptionist.java@ 13270

package org.greenstone.gsdl3.core;

import org.greenstone.gsdl3.util.*;
import org.greenstone.gsdl3.action.*;
// XML classes
import org.w3c.dom.Node; 
import org.w3c.dom.NodeList; 
import org.w3c.dom.Document; 
import org.w3c.dom.Element; 

// other java classes
import java.io.File;
import java.util.HashMap;
import java.util.Enumeration;

import org.apache.log4j.*;

/** 
 * This is a new version of the Receptionist for the NZDL interface
 * the interface requires a lot more info for each page
 * @see DefaultReceptionist
 */
public class NZDLReceptionist extends DefaultReceptionist {

     static Logger logger = Logger.getLogger(org.greenstone.gsdl3.core. NZDLReceptionist.class.getName());

    protected void addExtraInfo(Element page) {
    logger.debug("the  page before adding extra info is");
    logger.debug(this.converter.getPrettyString(page));

    super.addExtraInfo(page);

    // this gets the collection info
    Element page_response = (Element)GSXML.getChildByTagName(page, GSXML.PAGE_RESPONSE_ELEM);
    Element page_request = (Element)GSXML.getChildByTagName(page, GSXML.PAGE_REQUEST_ELEM);
    Element collection_info = (Element)GSXML.getChildByTagName(page_response, GSXML.COLLECTION_ELEM);
    if (collection_info== null) {
        return;
    }

    String collection = collection_info.getAttribute("name"); // should we take this from the request instead??
    // look through services and see if classifier one is present - need to
    // get the list of classifiers
    Element service_list = (Element)GSXML.getChildByTagName(collection_info, GSXML.SERVICE_ELEM+GSXML.LIST_MODIFIER);
    if (service_list == null) {
        // something weird has gone wrong
        return;
    }
    
    Element info_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
    String lang = page.getAttribute(GSXML.LANG_ATT);
    
    boolean do_classifier = false;
    boolean do_query = false;
    Element classifier_service = GSXML.getNamedElement(service_list, GSXML.SERVICE_ELEM, GSXML.NAME_ATT, "ClassifierBrowse");
    Element query_service = GSXML.getNamedElement(service_list, GSXML.SERVICE_ELEM, GSXML.NAME_ATT, "TextQuery");
    if (classifier_service != null) {
        do_classifier = true;
        // find the list of classifiers
    
        String to = GSPath.appendLink(collection, "ClassifierBrowse");
        Element info_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_DESCRIBE, to, lang, ""); 
        info_message.appendChild(info_request);
    }
    
    String action = page_request.getAttribute(GSXML.ACTION_ATT);
    String subaction = page_request.getAttribute(GSXML.SUBACTION_ATT);
    
    if (query_service != null && action.equals("p") && subaction.equals("about")) {
        do_query = true;
        // get the full description
        String to = GSPath.appendLink(collection, "TextQuery");
        Element query_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_DESCRIBE, to, lang, "");
        info_message.appendChild(query_request);
        
    }
    
    Element info_resp_message = (Element) this.mr.process(info_message);
    Element info_response = (Element) GSXML.getChildByTagName(info_resp_message, GSXML.RESPONSE_ELEM); 
    //  String path = GSPath.appendLink(GSXML.RESPONSE_ELEM, GSXML.SERVICE_ELEM);
    if (do_classifier) {
        Element classifier_service_info = (Element)GSXML.getNamedElement(info_response, GSXML.SERVICE_ELEM, GSXML.NAME_ATT, "CLassifierBrowse");
        if (classifier_service_info != null) {
        service_list.replaceChild(this.doc.importNode(classifier_service_info, true), classifier_service);
        }
    }
    if (do_query) {
        Element query_service_info = (Element)GSXML.getNamedElement(info_response, GSXML.SERVICE_ELEM, GSXML.NAME_ATT, "TextQuery");
        if (query_service_info != null) {
        service_list.replaceChild(this.doc.importNode(query_service_info, true), query_service);
        }
    }
    logger.debug("the final page before transforming is");
    logger.debug(this.converter.getPrettyString(page));
    return;
    }
    
}