js/pz2.js

   1 /*
   2 ** $Id: pz2.js,v 1.42 2007-07-02 12:52:03 jakub Exp $
   3 ** pz2.js - pazpar2's javascript client library.
   4 */
   5
   6 //since explorer is flawed
   7 if (!window['Node']) {
   8     window.Node = new Object();
   9     Node.ELEMENT_NODE = 1;
  10     Node.ATTRIBUTE_NODE = 2;
  11     Node.TEXT_NODE = 3;
  12     Node.CDATA_SECTION_NODE = 4;
  13     Node.ENTITY_REFERENCE_NODE = 5;
  14     Node.ENTITY_NODE = 6;
  15     Node.PROCESSING_INSTRUCTION_NODE = 7;
  16     Node.COMMENT_NODE = 8;
  17     Node.DOCUMENT_NODE = 9;
  18     Node.DOCUMENT_TYPE_NODE = 10;
  19     Node.DOCUMENT_FRAGMENT_NODE = 11;
  20     Node.NOTATION_NODE = 12;
  21 }
  22
  23 // prevent execution of more than once
  24 if(typeof window.pz2 == "undefined") {
  25 window.undefined = window.undefined;
  26
  27 var pz2 = function(paramArray) {
  28     //for convenience
  29     __myself = this;
  30
  31     //supported pazpar2's protocol version
  32     __myself.suppProtoVer = '1';
  33     __myself.pz2String = paramArray.pazpar2path || "search.pz2";
  34     __myself.stylesheet = paramArray.detailstylesheet || null;
  35     __myself.useSessions = true;
  36     if (paramArray.usesessions != undefined) {
  37          __myself.useSessions = paramArray.usesessions;
  38     }
  39
  40     //load stylesheet if required in async mode
  41     if( __myself.stylesheet ) {
  42         var request = new pzHttpRequest( __myself.stylesheet );
  43         request.async = false;
  44         request.get(
  45                 [],
  46                 function ( doc ) {
  47                     __myself.xslDoc = doc;
  48                 }
  49         );
  50     }
  51
  52     // at least one callback required
  53     if ( !paramArray )
  54         throw new Error("An array with parameters has to be suplied when instantiating a class");
  55
  56     __myself.errorHandler = paramArray.errorhandler || null;
  57
  58     // function callbacks
  59     __myself.statCallback = paramArray.onstat || null;
  60     __myself.showCallback = paramArray.onshow || null;
  61     __myself.termlistCallback = paramArray.onterm || null;
  62     __myself.recordCallback = paramArray.onrecord || null;
  63     __myself.bytargetCallback = paramArray.onbytarget || null;
  64     __myself.resetCallback = paramArray.onreset || null;
  65
  66     // termlist keys
  67     __myself.termKeys = paramArray.termlist || "subject";
  68
  69     // some configurational stuff
  70     __myself.keepAlive = 50000;
  71
  72     __myself.sessionID = null;
  73     __myself.initStatusOK = false;
  74     __myself.pingStatusOK = false;
  75     __myself.searchStatusOK = false;
  76
  77     if ( paramArray.keepAlive < __myself.keepAlive )
  78         __myself.keepAlive = paramArray.keepAlive;
  79
  80     // for sorting
  81     __myself.currentSort = "relevance";
  82     // where are we?
  83     __myself.currentStart = 0;
  84     __myself.currentNum = 20;
  85
  86     // last full record retrieved
  87     __myself.currRecID = null;
  88     // current query
  89     __myself.currQuery = null;
  90
  91     //timers
  92     __myself.statTime = paramArray.stattime || 1000;
  93     __myself.statTimer = null;
  94     __myself.termTime = paramArray.termtime || 1000;
  95     __myself.termTimer = null;
  96     __myself.showTime = paramArray.showtime || 1000;
  97     __myself.showTimer = null;
  98     __myself.showFastCount = 4;
  99     __myself.bytargetTime = paramArray.bytargettime || 1000;
 100     __myself.bytargetTimer = null;
 101
 102     // counters for each command and applied delay
 103     __myself.dumpFactor = 500;
 104     __myself.showCounter = 0;
 105     __myself.termCounter = 0;
 106     __myself.statCounter = 0;
 107     __myself.bytargetCounter = 0;
 108
 109     // active clients, updated by stat and show
 110     // might be an issue since bytarget will poll accordingly
 111     __myself.activeClients = 1;
 112
 113     // auto init session?
 114     if (paramArray.autoInit !== false)
 115         __myself.init();
 116 };
 117 pz2.prototype =
 118 {
 119    stop: function ()
 120    {
 121        clearTimeout(__myself.statTimer);
 122        clearTimeout(__myself.showTimer);
 123        clearTimeout(__myself.termTimer);
 124        clearTimeout(__myself.bytargetTimer);
 125     },
 126
 127     reset: function ()
 128     {
 129         __myself.sessionID = null;
 130         __myself.initStatusOK = false;
 131         __myself.pingStatusOK = false;
 132         __myself.searchStatusOK = false;
 133
 134         __myself.stop();
 135
 136         if ( __myself.resetCallback )
 137                 __myself.resetCallback();
 138     },
 139     init: function ( sessionId )
 140     {
 141         __myself.reset();
 142
 143         if ( sessionId != undefined ) {
 144             __myself.initStatusOK = true;
 145             __myself.sessionID = sessionId;
 146             __myself.ping();
 147         } else if (__myself.useSessions) {
 148             var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 149             request.get(
 150                 { "command": "init" },
 151                 function(data) {
 152                     if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
 153                         if ( data.getElementsByTagName("protocol")[0].childNodes[0].nodeValue != __myself.suppProtoVer )
 154                             throw new Error("Server's protocol not supported by the client");
 155                         __myself.initStatusOK = true;
 156                         __myself.sessionID = data.getElementsByTagName("session")[0].childNodes[0].nodeValue;
 157                         setTimeout("__myself.ping()", __myself.keepAlive);
 158                     }
 159                     else
 160                         // if it gets here the http return code was 200 (pz2 errors are 417)
 161                         // but the response was invalid, it should never occur
 162                         setTimeout("__myself.init()", 1000);
 163                 }
 164             );
 165         } else {
 166             __myself.initStatusOK = true;
 167         }
 168     },
 169     // no need to ping explicitly
 170     ping: function ()
 171     {
 172         if( !__myself.initStatusOK )
 173             return;
 174             // session is not initialized code here
 175         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 176         request.get(
 177             { "command": "ping", "session": __myself.sessionID },
 178             function(data) {
 179                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
 180                     __myself.pingStatusOK = true;
 181                     setTimeout("__myself.ping()", __myself.keepAlive);
 182                 }
 183                 else
 184                     // if it gets here the http return code was 200 (pz2 errors are 417)
 185                     // but the response was invalid, it should never occur
 186                     setTimeout("__myself.ping()", 1000);
 187             }
 188         );
 189     },
 190     search: function (query, num, sort, filter)
 191     {
 192         clearTimeout(__myself.statTimer);
 193         clearTimeout(__myself.showTimer);
 194         clearTimeout(__myself.termTimer);
 195         clearTimeout(__myself.bytargetTimer);
 196
 197         __myself.showCounter = 0;
 198         __myself.termCounter = 0;
 199         __myself.bytargetCounter = 0;
 200         __myself.statCounter = 0;
 201
 202         if( !__myself.initStatusOK )
 203             return;
 204
 205         if( query !== undefined )
 206             __myself.currQuery = query;
 207         else
 208             throw new Error("You need to supply query to the search command");
 209
 210         var searchParams = { "command": "search", "query": __myself.currQuery, "session": __myself.sessionID };
 211
 212         if (filter !== undefined)
 213             searchParams["filter"] = filter;
 214
 215         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 216         request.get(
 217             searchParams,
 218             function(data) {
 219                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
 220                     __myself.searchStatusOK = true;
 221                     //piggyback search
 222                     __myself.show(0, num, sort);
 223                     if ( __myself.statCallback )
 224                         __myself.stat();
 225                         //__myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 4);
 226                     if ( __myself.termlistCallback )
 227                         __myself.termlist();
 228                         //__myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 4);
 229                     if ( __myself.bytargetCallback )
 230                         __myself.bytarget();
 231                         //__myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 4);
 232                 }
 233                 else
 234                     // if it gets here the http return code was 200 (pz2 errors are 417)
 235                     // but the response was invalid, it should never occur
 236                     setTimeout("__myself.search(__myself.currQuery)", 500);
 237             }
 238         );
 239     },
 240     stat: function()
 241     {
 242         if( !__myself.initStatusOK )
 243             return;
 244         // if called explicitly takes precedence
 245         clearTimeout(__myself.statTimer);
 246         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 247         request.get(
 248             { "command": "stat", "session": __myself.sessionID },
 249             function(data) {
 250                 if ( data.getElementsByTagName("stat") ) {
 251                     var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
 252                     __myself.activeClients = activeClients;
 253                     var stat = {
 254                     "activeclients": activeClients,
 255                     "hits": Number( data.getElementsByTagName("hits")[0].childNodes[0].nodeValue ),
 256                     "records": Number( data.getElementsByTagName("records")[0].childNodes[0].nodeValue ),
 257                     "clients": Number( data.getElementsByTagName("clients")[0].childNodes[0].nodeValue ),
 258                     "initializing": Number( data.getElementsByTagName("initializing")[0].childNodes[0].nodeValue ),
 259                     "searching": Number( data.getElementsByTagName("searching")[0].childNodes[0].nodeValue ),
 260                     "presenting": Number( data.getElementsByTagName("presenting")[0].childNodes[0].nodeValue ),
 261                     "idle": Number( data.getElementsByTagName("idle")[0].childNodes[0].nodeValue ),
 262                     "failed": Number( data.getElementsByTagName("failed")[0].childNodes[0].nodeValue ),
 263                     "error": Number( data.getElementsByTagName("error")[0].childNodes[0].nodeValue )
 264                     };
 265
 266                     __myself.statCounter++;
 267                     var delay = __myself.statTime + __myself.statCounter * __myself.dumpFactor;
 268                     if ( activeClients > 0 )
 269                         __myself.statTimer = setTimeout("__myself.stat()", delay);
 270
 271                     __myself.statCallback(stat);
 272                 }
 273                 else
 274                     // if it gets here the http return code was 200 (pz2 errors are 417)
 275                     // but the response was invalid, it should never occur
 276                     __myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 4);
 277             }
 278         );
 279     },
 280     show: function(start, num, sort)
 281     {
 282         if( !__myself.searchStatusOK )
 283             return;
 284         // if called explicitly takes precedence
 285         clearTimeout(__myself.showTimer);
 286
 287         if( sort !== undefined )
 288             __myself.currentSort = sort;
 289         if( start !== undefined )
 290             __myself.currentStart = Number( start );
 291         if( num !== undefined )
 292             __myself.currentNum = Number( num );
 293         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 294         var context = this;
 295         request.get(
 296             { "command": "show", "session": __myself.sessionID, "start": __myself.currentStart,
 297               "num": __myself.currentNum, "sort": __myself.currentSort, "block": 1 },
 298             function(data) {
 299                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
 300                     // first parse the status data send along with records
 301                     // this is strictly bound to the format
 302                     var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
 303                     __myself.activeClients = activeClients;
 304                     var show = {
 305                     "activeclients": activeClients,
 306                     "merged": Number( data.getElementsByTagName("merged")[0].childNodes[0].nodeValue ),
 307                     "total": Number( data.getElementsByTagName("total")[0].childNodes[0].nodeValue ),
 308                     "start": Number( data.getElementsByTagName("start")[0].childNodes[0].nodeValue ),
 309                     "num": Number( data.getElementsByTagName("num")[0].childNodes[0].nodeValue ),
 310                     "hits": []
 311                     };
 312                     // parse all the first-level nodes for all <hit> tags
 313                     var hits = data.getElementsByTagName("hit");
 314                     var hit = new Array();
 315                     for (i = 0; i < hits.length; i++) {
 316                         show.hits[i] = new Array();
 317                         show.hits[i]['location'] = new Array();
 318                         for ( j = 0; j < hits[i].childNodes.length; j++) {
 319                             var locCount = 0;
 320                             if ( hits[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
 321                                 if (hits[i].childNodes[j].nodeName == 'location') {
 322                                     var locNode = hits[i].childNodes[j];
 323                                     var id = locNode.getAttribute('id');
 324                                     show.hits[i]['location'][id] = {
 325                                         "id": locNode.getAttribute("id"),
 326                                         "name": locNode.getAttribute("name")
 327                                     };
 328                                 }
 329                                 else {
 330                                     var nodeName = hits[i].childNodes[j].nodeName;
 331                                     var nodeText = 'ERROR'
 332                                     if ( hits[i].childNodes[j].firstChild )
 333                                         nodeText = hits[i].childNodes[j].firstChild.nodeValue;
 334                                     show.hits[i][nodeName] = nodeText;
 335                                 }
 336                             }
 337                         }
 338                     }
 339                     __myself.showCounter++;
 340                     var delay = __myself.showTime;
 341                     if (__myself.showCounter > __myself.showFastCount)
 342                             delay += __myself.showCounter * __myself.dumpFactor;
 343                     if ( activeClients > 0 )
 344                         __myself.showTimer = setTimeout("__myself.show()", delay);
 345
 346                     __myself.showCallback(show);
 347                 }
 348                 else
 349                     // if it gets here the http return code was 200 (pz2 errors are 417)
 350                     // but the response was invalid, it should never occur
 351                     __myself.showTimer = setTimeout("__myself.show()", __myself.showTime / 4);
 352             }
 353         );
 354     },
 355     record: function(id)
 356     {
 357         if( !__myself.searchStatusOK )
 358             return;
 359
 360         if( id !== undefined )
 361             __myself.currRecID = id;
 362         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 363         request.get(
 364             { "command": "record", "session": __myself.sessionID, "id": __myself.currRecID },
 365             function(data) {
 366                 var recordNode;
 367                 var record = new Array();
 368                 if ( recordNode = data.getElementsByTagName("record")[0] ) {
 369                     // if stylesheet was fetched do not parse the response
 370                     if ( __myself.xslDoc ) {
 371                         record['recid'] = recordNode.getElementsByTagName("recid")[0].firstChild.nodeValue;
 372                         record['xmlDoc'] = data;
 373                         record['xslDoc'] = __myself.xslDoc;
 374                     } else {
 375                         for ( i = 0; i < recordNode.childNodes.length; i++) {
 376                             if ( recordNode.childNodes[i].nodeType == Node.ELEMENT_NODE
 377                                     && recordNode.childNodes[i].nodeName != 'location' ) {
 378                                 var nodeName = recordNode.childNodes[i].nodeName;
 379                                 var nodeText = recordNode.childNodes[i].firstChild.nodeValue;
 380                                 record[nodeName] = nodeText;
 381                             }
 382                         }
 383                         // the location might be empty!!
 384                         var locationNodes = recordNode.getElementsByTagName("location");
 385                         record["location"] = new Array();
 386                         for ( i = 0; i < locationNodes.length; i++ ) {
 387                             record["location"][i] = {
 388                                 "id": locationNodes[i].getAttribute("id"),
 389                                 "name": locationNodes[i].getAttribute("name")
 390                             };
 391
 392                             for ( j = 0; j < locationNodes[i].childNodes.length; j++) {
 393                                 if ( locationNodes[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
 394                                     var nodeName = locationNodes[i].childNodes[j].nodeName;
 395                                     var nodeText = '';
 396                                     if (locationNodes[i].childNodes[j].firstChild)
 397                                             nodeText = locationNodes[i].childNodes[j].firstChild.nodeValue;
 398                                     record["location"][i][nodeName] = nodeText;
 399                                 }
 400                             }
 401                         }
 402                     }
 403
 404                     __myself.recordCallback(record);
 405                 }
 406                 else
 407                     // if it gets here the http return code was 200 (pz2 errors are 417)
 408                     // but the response was invalid, it should never occur
 409                     setTimeout("__myself.record(__myself.currRecID)", 500);
 410             }
 411         );
 412     },
 413     termlist: function()
 414     {
 415         if( !__myself.searchStatusOK )
 416             return;
 417         // if called explicitly takes precedence
 418         clearTimeout(__myself.termTimer);
 419         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 420         request.get(
 421             { "command": "termlist", "session": __myself.sessionID, "name": __myself.termKeys },
 422             function(data) {
 423                 if ( data.getElementsByTagName("termlist") ) {
 424                     var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
 425                     __myself.activeClients = activeClients;
 426                     var termList = { "activeclients":  activeClients };
 427                     var termLists = data.getElementsByTagName("list");
 428                     //for each termlist
 429                     for (i = 0; i < termLists.length; i++) {
 430                         var listName = termLists[i].getAttribute('name');
 431                         termList[listName] = new Array();
 432                         var terms = termLists[i].getElementsByTagName('term');
 433                         //for each term in the list
 434                         for (j = 0; j < terms.length; j++) {
 435                             var term = {
 436                                 "name": (terms[j].getElementsByTagName("name")[0].childNodes.length
 437                                                 ? terms[j].getElementsByTagName("name")[0].childNodes[0].nodeValue
 438                                                 : 'ERROR'),
 439                                 "freq": terms[j].getElementsByTagName("frequency")[0].childNodes[0].nodeValue || 'ERROR'
 440                             };
 441
 442                             var termIdNode = terms[j].getElementsByTagName("id");
 443                             if(terms[j].getElementsByTagName("id").length)
 444                                 term["id"] = termIdNode[0].childNodes[0].nodeValue;
 445
 446                             termList[listName][j] = term;
 447                         }
 448                     }
 449
 450                     __myself.termCounter++;
 451                     var delay = __myself.termTime + __myself.termCounter * __myself.dumpFactor;
 452                     if ( activeClients > 0 )
 453                         __myself.termTimer = setTimeout("__myself.termlist()", delay);
 454
 455                    __myself.termlistCallback(termList);
 456                 }
 457                 else
 458                     // if it gets here the http return code was 200 (pz2 errors are 417)
 459                     // but the response was invalid, it should never occur
 460                     __myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 4);
 461             }
 462         );
 463
 464     },
 465     bytarget: function()
 466     {
 467         if( !__myself.searchStatusOK )
 468             return;
 469         // if called explicitly takes precedence
 470         clearTimeout(__myself.bytargetTimer);
 471         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 472         request.get(
 473             { "command": "bytarget", "session": __myself.sessionID },
 474             function(data) {
 475                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
 476                     var targetNodes = data.getElementsByTagName("target");
 477                     var bytarget = new Array();
 478                     for ( i = 0; i < targetNodes.length; i++) {
 479                         bytarget[i] = new Array();
 480                         for( j = 0; j < targetNodes[i].childNodes.length; j++ ) {
 481                             if ( targetNodes[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
 482                                 var nodeName = targetNodes[i].childNodes[j].nodeName;
 483                                 var nodeText = targetNodes[i].childNodes[j].firstChild.nodeValue;
 484                                 bytarget[i][nodeName] = nodeText;
 485                             }
 486                         }
 487                     }
 488
 489                     __myself.bytargetCounter++;
 490                     var delay = __myself.bytargetTime + __myself.bytargetCounter * __myself.dumpFactor;
 491                     if ( __myself.activeClients > 0 )
 492                         __myself.bytargetTimer = setTimeout("__myself.bytarget()", delay);
 493
 494                     __myself.bytargetCallback(bytarget);
 495                 }
 496                 else
 497                     // if it gets here the http return code was 200 (pz2 errors are 417)
 498                     // but the response was invalid, it should never occur
 499                     __myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 4);
 500             }
 501         );
 502     },
 503     // just for testing, probably shouldn't be here
 504     showNext: function(page)
 505     {
 506         var step = page || 1;
 507         __myself.show( ( step * __myself.currentNum ) + __myself.currentStart );
 508     },
 509     showPrev: function(page)
 510     {
 511         if (__myself.currentStart == 0 )
 512             return false;
 513         var step = page || 1;
 514         var newStart = __myself.currentStart - (step * __myself.currentNum );
 515         __myself.show( newStart > 0 ? newStart : 0 );
 516     },
 517     showPage: function(pageNum)
 518     {
 519         //var page = pageNum || 1;
 520         __myself.show(pageNum * __myself.currentNum);
 521     }
 522 };
 523
 524 /*
 525 *********************************************************************************
 526 ** AJAX HELPER CLASS ************************************************************
 527 *********************************************************************************
 528 */
 529 var pzHttpRequest = function ( url, errorHandler ) {
 530         this.request = null;
 531         this.url = url;
 532         this.errorHandler = errorHandler || null;
 533         this.async = true;
 534
 535         if ( window.XMLHttpRequest ) {
 536             this.request = new XMLHttpRequest();
 537         } else if ( window.ActiveXObject ) {
 538             try {
 539                 this.request = new ActiveXObject( 'Msxml2.XMLHTTP' );
 540             } catch (err) {
 541                 this.request = new ActiveXObject( 'Microsoft.XMLHTTP' );
 542             }
 543         }
 544 };
 545
 546 pzHttpRequest.prototype =
 547 {
 548     get: function ( params, callback )
 549     {
 550         this._send( 'GET', params, null, callback );
 551     },
 552
 553     post: function ( params, data, callback )
 554     {
 555         this._send( 'POST', params, data, callback );
 556     },
 557
 558     _send: function ( type, params, data, callback )
 559     {
 560         this.callback = callback;
 561         var context = this;
 562         this.request.open( type, this._urlAppendParams(params), this.async );
 563         //this.request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
 564         this.request.onreadystatechange = function () {
 565             context._handleResponse();
 566         }
 567         this.request.send(data);
 568     },
 569
 570     _urlAppendParams: function (params)
 571     {
 572         var getUrl = this.url;
 573
 574         var sep = '?';
 575         var el = params;
 576         for (var key in el) {
 577             if (el[key] != null) {
 578                 getUrl += sep + key + '=' + encodeURI(el[key]);
 579                 sep = '&';
 580             }
 581         }
 582         return getUrl;
 583     },
 584
 585     _handleResponse: function ()
 586     {
 587         if ( this.request.readyState == 4 ) {
 588             if ( this.request.status == 200 ) {
 589                 this.callback( this.request.responseXML );
 590             }
 591             // pz errors
 592             else if ( this.request.status == 417 ) {
 593                 var errMsg = this.request.responseXML.getElementsByTagName("error")[0].childNodes[0].nodeValue;
 594                 var errCode = this.request.responseXML.getElementsByTagName("error")[0].getAttribute("code");
 595
 596                 var err = new Error(errMsg);
 597                 err.code = errCode;
 598
 599                 if (this.errorHandler) {
 600                     this.errorHandler(err);
 601                 }
 602                 else {
 603                     throw err;
 604                 }
 605             }
 606             else {
 607                 var err = new Error("XMLHttpRequest error. STATUS: "
 608                             + this.request.status + " STATUS TEXT: "
 609                             + this.request.statusText );
 610                 err.code = 'HTTP';
 611
 612                 if (this.errorHandler) {
 613                     this.errorHandler(err);
 614                 }
 615                 else {
 616                     throw err;
 617                 }
 618             }
 619         }
 620     }
 621 };
 622
 623 /*
 624 *********************************************************************************
 625 ** QUERY CLASS ******************************************************************
 626 *********************************************************************************
 627 */
 628 var pzQuery = function()
 629 {
 630     this.simpleQuery = '';
 631     this.singleFilter = null;
 632     this.advTerms = new Array();
 633     this.filterHash = new Array();
 634     this.numTerms = 0;
 635     this.filterNums = 0;
 636 };
 637 pzQuery.prototype = {
 638     reset: function()
 639     {
 640         this.simpleQuery = '';
 641         this.advTerms = new Array();
 642         this.simpleFilter = null;
 643         this.numTerms = 0;
 644     },
 645     clearSimpleQuery: function()
 646     {
 647         this.simpleQuery = '';
 648     },
 649     addTerm: function(field, value)
 650     {
 651         var term = {"field": field, "value": value};
 652         this.advTerms[this.numTerms] = term;
 653         this.numTerms++;
 654     },
 655     getTermValueByIdx: function(index)
 656     {
 657         return this.advTerms[index].value;
 658     },
 659     getTermFieldByIdx: function(index)
 660     {
 661         return this.advTerms[index].field;
 662     },
 663     /* semicolon separated list of terms for given field*/
 664     getTermsByField: function(field)
 665     {
 666         var terms = '';
 667         for(var i = 0; i < this.advTerms.length; i++)
 668         {
 669             if( this.advTerms[i].field == field )
 670                 terms = terms + this.queryHas[i].value + ';';
 671         }
 672         return terms;
 673     },
 674     addTermsFromList: function(inputString, field)
 675     {
 676         var inputArr = inputString.split(';');
 677         for(var i=0; i < inputArr.length; i++)
 678         {
 679             if(inputArr[i].length < 3) continue;
 680             this.advTerms[this.numTerms] = {"field": field, "value": inputArr[i] };
 681             this.numTerms++;
 682         }
 683     },
 684     removeTermByIdx: function(index)
 685     {
 686         this.advTerms.splice(index, 1);
 687         this.numTerms--;
 688     },
 689     toCCL: function()
 690     {
 691         var ccl = '';
 692         if( this.simpleQuery != '')
 693             ccl = this.simpleQuery;
 694         for(var i = 0; i < this.advTerms.length; i++)
 695         {
 696             if (ccl != '') ccl = ccl + ' and ';
 697             ccl = ccl + this.advTerms[i].field+'="'+this.advTerms[i].value+'"';
 698         }
 699         return ccl;
 700     },
 701     addFilter: function(name, value)
 702     {
 703         var filter = {"name": name, "id": value };
 704         this.filterHash[this.filterHash.length] = filter;
 705         this.filterNums++
 706         return  this.filterHash.length - 1;
 707     },
 708     setFilter: function(name, value)
 709     {
 710         this.filterHash = new Array();
 711         this.filterNums = 0;
 712         this.addFilter(name, value);
 713     },
 714     getFilter: function(index)
 715     {
 716         return this.filterHash[index].id;
 717     },
 718     getFilterName: function(index)
 719     {
 720         return this.filterHash[index].name;
 721     },
 722     removeFilter: function(index)
 723     {
 724         delete this.filterHash[index];
 725         this.filterNums--;
 726     },
 727     clearFilter: function()
 728     {
 729         this.filterHash = new Array();
 730         this.filterNums = 0;
 731     },
 732     getFilterString: function()
 733     {
 734         //temporary
 735         if( this.singleFilter != null ) {
 736             return 'pz:id='+this.singleFilter.id;
 737         }
 738         else if( this.filterNums <= 0 ) {
 739             return undefined;
 740         }
 741
 742         var filter = 'pz:id=';
 743         for(var i = 0; i < this.filterHash.length; i++)
 744         {
 745             if (this.filterHash[i] == undefined) continue;
 746             if (filter > 'pz:id=') filter = filter + '|';
 747             filter += this.filterHash[i].id;
 748         }
 749         return filter;
 750     },
 751     totalLength: function()
 752     {
 753         var simpleLength = this.simpleQuery != '' ? 1 : 0;
 754         return this.advTerms.length + simpleLength;
 755     },
 756     clearSingleFilter: function()
 757     {
 758         this.singleFilter = null;
 759     },
 760     setSingleFilter: function(name, value)
 761     {
 762         this.singleFilter = {"name": name, "id": value };
 763     },
 764     getSingleFilterName: function()
 765     {
 766         return this.singleFilter.name;
 767     }
 768 }
 769
 770 }