Ignore:
Timestamp:
2011-05-09T14:37:04+12:00 (13 years ago)
Author:
sjm84
Message:

Updating this branch to match the latest Greenstone3 changes

Location:
main/branches/64_bit_Greenstone/greenstone3
Files:
2 edited

Legend:

Unmodified
Added
Removed

  • main/branches/64_bit_Greenstone/greenstone3

  • main/branches/64_bit_Greenstone/greenstone3/src/java/org/greenstone/gsdl3/core/DefaultReceptionist.java

    r19852 r24007  
    1717
    1818/** The default greenstone receptionist - needs some extra info for each page
    19  */
     19*/
    2020public class DefaultReceptionist extends TransformingReceptionist {
    2121
    22      static Logger logger = Logger.getLogger(org.greenstone.gsdl3.core.DefaultReceptionist.class.getName());
    23    
    24   /** add in the collection description to the page, then for each service, add in the service description */
    25     protected void addExtraInfo(Element page) {
    26       super.addExtraInfo(page);
     22    static Logger logger = Logger.getLogger(org.greenstone.gsdl3.core.DefaultReceptionist.class.getName());
    2723   
    28     Element page_request = (Element)GSXML.getChildByTagName(page, GSXML.PAGE_REQUEST_ELEM);
    29     // if it is a system request, then we don't bother with this.
    30     String action = page_request.getAttribute(GSXML.ACTION_ATT);
    31     if (action.equals("s")) {
    32         logger.error("HACK: don't ask for coll info if system action");
    33         return;
     24    /** add in the collection description to the page, then for each service, add in the service description */
     25    protected void addExtraInfo(Element page) {
     26        super.addExtraInfo(page);
     27       
     28        Element page_request = (Element)GSXML.getChildByTagName(page, GSXML.PAGE_REQUEST_ELEM);
     29        // if it is a system request, then we don't bother with this.
     30        String action = page_request.getAttribute(GSXML.ACTION_ATT);
     31        if (action.equals("s")) {
     32            logger.error("HACK: don't ask for coll info if system action");
     33            return;
     34        }
     35        logger.debug("add extra info, page request="+this.converter.getString(page_request));
     36        // is a collection defined?
     37        Element param_list = (Element)GSXML.getChildByTagName(page_request, GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);
     38        if (param_list==null) { // must be the original home page
     39            logger.debug(" no param list, assuming home page");
     40            return;
     41        }
     42        Element coll_param = GSXML.getNamedElement(param_list, GSXML.PARAM_ELEM, GSXML.NAME_ATT, GSParams.COLLECTION);
     43        if (coll_param == null) {
     44            logger.debug(" coll param is null, returning");
     45            return;
     46        }
     47
     48        // see if the collection/cluster element is already there
     49        String coll_name = coll_param.getAttribute(GSXML.VALUE_ATT);
     50        String lang = page_request.getAttribute(GSXML.LANG_ATT);
     51        String uid = page_request.getAttribute(GSXML.USER_ID_ATT);
     52       
     53        if (coll_name.equals("")) {
     54            Element pc_param = GSXML.getNamedElement(param_list, GSXML.PARAM_ELEM, GSXML.NAME_ATT, "p.c");
     55            if(pc_param != null)
     56            {
     57                coll_name = pc_param.getAttribute(GSXML.VALUE_ATT);
     58            }
     59        }
     60       
     61        boolean get_service_description = false;
     62        Element page_response = (Element)GSXML.getChildByTagName(page, GSXML.PAGE_RESPONSE_ELEM);
     63        if (this.language_list != null) {
     64            page_response.appendChild(this.language_list);
     65        }
     66        Element coll_description = (Element)GSXML.getChildByTagName(page_response, GSXML.COLLECTION_ELEM);
     67        if (coll_description == null) {
     68            // try cluster
     69            coll_description = (Element)GSXML.getChildByTagName(page_response, GSXML.CLUSTER_ELEM);
     70        }
     71        if (coll_description == null) {
     72       
     73            // we dont have one yet - get it
     74            Element coll_about_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
     75            Element coll_about_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_DESCRIBE,  coll_name, lang, uid);
     76            coll_about_message.appendChild(coll_about_request);
     77           
     78            Node coll_about_response_message = this.mr.process(coll_about_message);
     79            Element coll_about_response = (Element)GSXML.getChildByTagName(coll_about_response_message, GSXML.RESPONSE_ELEM);
     80            if (coll_about_response == null) {
     81                return;
     82            }
     83            coll_description = (Element)GSXML.getChildByTagName(coll_about_response, GSXML.COLLECTION_ELEM);
     84            if (coll_description==null) { // may be a cluster
     85                coll_description = (Element)GSXML.getChildByTagName(coll_about_response, GSXML.CLUSTER_ELEM);
     86            }
     87           
     88            if (coll_description == null) {
     89                logger.error(" no collection description, returning");
     90                return;
     91            }
     92            // have found one, append it to the page response
     93            coll_description = (Element)this.doc.importNode(coll_description, true);
     94            page_response.appendChild(coll_description);
     95            get_service_description = true;
     96        }
     97
     98        // have got a coll description
     99        // now get the dispay info for the services
     100        Element service_list = (Element)GSXML.getChildByTagName(coll_description, GSXML.SERVICE_ELEM+GSXML.LIST_MODIFIER);
     101        if (service_list == null) {
     102            logger.error(" no service list, returning");
     103            // something weird has gone wrong
     104            return;
     105        }
     106
     107        NodeList services = service_list.getElementsByTagName(GSXML.SERVICE_ELEM);
     108        if (services.getLength()==0) {
     109            logger.error("DefaultReceoptionist: no services found for colllection/cluster "+ coll_name);
     110            return;
     111        }
     112        // check one service for display items
     113        if (!get_service_description) {
     114            // we dont know yet if we need to get these
     115            int i=1;
     116            Element test_s = (Element)services.item(0);
     117            while (i<services.getLength() && (test_s.getAttribute(GSXML.TYPE_ATT).equals(GSXML.SERVICE_TYPE_RETRIEVE) || test_s.getAttribute(GSXML.TYPE_ATT).equals(GSXML.SERVICE_TYPE_OAI))) {
     118                test_s = (Element)services.item(i); i++;
     119            }
     120            if (i==services.getLength()) {
     121                // we have only found retrieve or oai services, so dont need descripitons anyway
     122                return;
     123            }
     124            if (GSXML.getChildByTagName(test_s, GSXML.DISPLAY_TEXT_ELEM) !=null) {
     125                // have got descriptions already,
     126                return;
     127            }
     128        }
     129
     130        // if get here, we need to get the service descriptions
     131       
     132        // we will send all the requests in a single message
     133        Element info_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
     134        for (int i=0; i<services.getLength(); i++) {
     135            Element c = (Element)services.item(i);
     136            String name = c.getAttribute(GSXML.NAME_ATT);
     137            String address = GSPath.appendLink(coll_name, name);
     138            Element info_request = GSXML.createBasicRequest(this.doc,  GSXML.REQUEST_TYPE_DESCRIBE, address, lang, uid);
     139            //Element req_param_list = this.doc.createElement(GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);
     140            //req_param_list.appendChild(GSXML.createParameter(this.doc, GSXML.SUBSET_PARAM, GSXML.DISPLAY_TEXT_ELEM+GSXML.LIST_MODIFIER));
     141            //info_request.appendChild(req_param_list);
     142            info_message.appendChild(info_request);
     143           
     144        }
     145
     146        Element info_response = (Element)this.mr.process(info_message);
     147
     148        NodeList service_responses = info_response.getElementsByTagName(GSXML.RESPONSE_ELEM);
     149        // check that have same number of responses as collections
     150        if (services.getLength() != service_responses.getLength()) {
     151            logger.error(" didn't get a response for each service - somethings gone wrong!");
     152            // for now, dont use the metadata
     153        } else {
     154            for (int i=0; i<services.getLength(); i++) {
     155                Element c1 = (Element)services.item(i);
     156                Element c2 = (Element)GSXML.getChildByTagName((Element)service_responses.item(i), GSXML.SERVICE_ELEM);
     157                if (c1 !=null && c2 !=null && c1.getAttribute(GSXML.NAME_ATT).equals(c2.getAttribute(GSXML.NAME_ATT))) {
     158                    //add the service data into the original response
     159                    GSXML.mergeElements(c1, c2);
     160                } else {
     161                    logger.debug(" response does not correspond to request!");
     162                }
     163               
     164            }
     165        }
    34166    }
    35     logger.debug("add extra info, page request="+this.converter.getString(page_request));
    36     // is a collection defined?
    37     Element param_list = (Element)GSXML.getChildByTagName(page_request, GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);
    38     if (param_list==null) { // must be the original home page
    39         logger.debug(" no param list, assuming home page");
    40         return;
    41     }
    42     Element coll_param = GSXML.getNamedElement(param_list, GSXML.PARAM_ELEM, GSXML.NAME_ATT, GSParams.COLLECTION);
    43     if (coll_param == null) {
    44         logger.debug(" coll param is null, returning");
    45         return;
    46     }
    47 
    48     // see if the collection/cluster element is already there
    49     String coll_name = coll_param.getAttribute(GSXML.VALUE_ATT);
    50     String lang = page_request.getAttribute(GSXML.LANG_ATT);
    51     String uid = page_request.getAttribute(GSXML.USER_ID_ATT);
    52    
    53     boolean get_service_description = false;
    54     Element page_response = (Element)GSXML.getChildByTagName(page, GSXML.PAGE_RESPONSE_ELEM);
    55     if (this.language_list != null) {
    56         page_response.appendChild(this.language_list);
    57     }
    58     Element coll_description = (Element)GSXML.getChildByTagName(page_response, GSXML.COLLECTION_ELEM);
    59     if (coll_description == null) {
    60         // try cluster
    61         coll_description = (Element)GSXML.getChildByTagName(page_response, GSXML.CLUSTER_ELEM);
    62     }
    63     if (coll_description == null) {
    64         // we dont have one yet - get it
    65         Element coll_about_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
    66         Element coll_about_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_DESCRIBE,  coll_name, lang, uid);
    67         coll_about_message.appendChild(coll_about_request);
    68        
    69         Node coll_about_response_message = this.mr.process(coll_about_message);
    70         Element coll_about_response = (Element)GSXML.getChildByTagName(coll_about_response_message, GSXML.RESPONSE_ELEM);
    71         if (coll_about_response == null) {
    72         return;
    73         }
    74         coll_description = (Element)GSXML.getChildByTagName(coll_about_response, GSXML.COLLECTION_ELEM);
    75         if (coll_description==null) { // may be a cluster
    76         coll_description = (Element)GSXML.getChildByTagName(coll_about_response, GSXML.CLUSTER_ELEM);
    77         }
    78        
    79         if (coll_description == null) {
    80         logger.error(" no collection description, returning");
    81         return;
    82         }
    83         // have found one, append it to the page response
    84         coll_description = (Element)this.doc.importNode(coll_description, true);
    85         page_response.appendChild(coll_description);
    86         get_service_description = true;
    87     }
    88 
    89     // have got a coll description
    90    
    91     // now get the dispay info for the services
    92     Element service_list = (Element)GSXML.getChildByTagName(coll_description, GSXML.SERVICE_ELEM+GSXML.LIST_MODIFIER);
    93     if (service_list == null) {
    94         logger.error(" no service list, returning");
    95         // something weird has gone wrong
    96         return;
    97     }
    98 
    99     NodeList services = service_list.getElementsByTagName(GSXML.SERVICE_ELEM);
    100     if (services.getLength()==0) {
    101         logger.error("DefaultReceoptionist: no services found for colllection/cluster "+ coll_name);
    102         return;
    103     }
    104     // check one service for display items
    105     if (!get_service_description) {
    106         // we dont know yet if we need to get these
    107         int i=1;
    108         Element test_s = (Element)services.item(0);
    109         while (i<services.getLength() && (test_s.getAttribute(GSXML.TYPE_ATT).equals(GSXML.SERVICE_TYPE_RETRIEVE) || test_s.getAttribute(GSXML.TYPE_ATT).equals(GSXML.SERVICE_TYPE_OAI))) {
    110         test_s = (Element)services.item(i); i++;
    111         }
    112         if (i==services.getLength()) {
    113         // we have only found retrieve or oai services, so dont need descripitons anyway
    114         return;
    115         }
    116         if (GSXML.getChildByTagName(test_s, GSXML.DISPLAY_TEXT_ELEM) !=null) {
    117         // have got descriptions already,
    118         return;
    119         }
    120     }
    121 
    122     // if get here, we need to get the service descriptions
    123        
    124     // we will send all the requests in a single message
    125     Element info_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
    126     for (int i=0; i<services.getLength(); i++) {
    127         Element c = (Element)services.item(i);
    128         String name = c.getAttribute(GSXML.NAME_ATT);
    129         String address = GSPath.appendLink(coll_name, name);
    130         Element info_request = GSXML.createBasicRequest(this.doc,  GSXML.REQUEST_TYPE_DESCRIBE, address, lang, uid);
    131         Element req_param_list = this.doc.createElement(GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);
    132         req_param_list.appendChild(GSXML.createParameter(this.doc, GSXML.SUBSET_PARAM, GSXML.DISPLAY_TEXT_ELEM+GSXML.LIST_MODIFIER));
    133         info_request.appendChild(req_param_list);
    134         info_message.appendChild(info_request);
    135        
    136     }
    137 
    138     Element info_response = (Element)this.mr.process(info_message);
    139 
    140     NodeList service_responses = info_response.getElementsByTagName(GSXML.RESPONSE_ELEM);
    141     // check that have same number of responses as collections
    142     if (services.getLength() != service_responses.getLength()) {
    143         logger.error(" didn't get a response for each service - somethings gone wrong!");
    144         // for now, dont use the metadata
    145     } else {
    146         for (int i=0; i<services.getLength(); i++) {
    147         Element c1 = (Element)services.item(i);
    148         Element c2 = (Element)GSXML.getChildByTagName((Element)service_responses.item(i), GSXML.SERVICE_ELEM);
    149         if (c1 !=null && c2 !=null && c1.getAttribute(GSXML.NAME_ATT).equals(c2.getAttribute(GSXML.NAME_ATT))) {
    150             //add the service data into the original response
    151             GSXML.mergeElements(c1, c2);
    152         } else {
    153             logger.debug(" response does not correspond to request!");
    154         }
    155        
    156         }
    157     }
    158    
    159     }
    160167}
    161168
Note: See TracChangeset for help on using the changeset viewer.