2 ** $Id: pz2.js,v 1.57 2007-09-14 09:46:49 jakub Exp $
3 ** pz2.js - pazpar2's javascript client library.
6 //since explorer is flawed
8 window.Node = new Object();
10 Node.ATTRIBUTE_NODE = 2;
12 Node.CDATA_SECTION_NODE = 4;
13 Node.ENTITY_REFERENCE_NODE = 5;
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;
23 // prevent execution of more than once
24 if(typeof window.pz2 == "undefined") {
25 window.undefined = window.undefined;
27 var pz2 = function ( paramArray )
30 // at least one callback required
32 throw new Error("Pz2.js: An array with parameters has to be suplied when instantiating a class");
37 //supported pazpar2's protocol version
38 __myself.suppProtoVer = '1';
39 if (typeof paramArray.pazpar2path != "undefined")
40 __myself.pz2String = paramArray.pazpar2path;
42 __myself.pz2String = "/pazpar2/search.pz2";
43 __myself.useSessions = true;
45 __myself.stylesheet = paramArray.detailstylesheet || null;
46 //load stylesheet if required in async mode
47 if( __myself.stylesheet ) {
48 var request = new pzHttpRequest( __myself.stylesheet );
49 request.get( {}, function ( doc ) { __myself.xslDoc = doc; } );
52 __myself.errorHandler = paramArray.errorhandler || null;
55 __myself.statCallback = paramArray.onstat || null;
56 __myself.showCallback = paramArray.onshow || null;
57 __myself.termlistCallback = paramArray.onterm || null;
58 __myself.recordCallback = paramArray.onrecord || null;
59 __myself.bytargetCallback = paramArray.onbytarget || null;
60 __myself.resetCallback = paramArray.onreset || null;
63 __myself.termKeys = paramArray.termlist || "subject";
65 // some configurational stuff
66 __myself.keepAlive = 50000;
68 if ( paramArray.keepAlive < __myself.keepAlive )
69 __myself.keepAlive = paramArray.keepAlive;
71 __myself.sessionID = null;
72 __myself.initStatusOK = false;
73 __myself.pingStatusOK = false;
74 __myself.searchStatusOK = false;
77 __myself.currentSort = "relevance";
80 __myself.currentStart = 0;
81 __myself.currentNum = 20;
83 // last full record retrieved
84 __myself.currRecID = null;
87 __myself.currQuery = null;
90 __myself.statTime = paramArray.stattime || 1000;
91 __myself.statTimer = null;
92 __myself.termTime = paramArray.termtime || 1000;
93 __myself.termTimer = null;
94 __myself.showTime = paramArray.showtime || 1000;
95 __myself.showTimer = null;
96 __myself.showFastCount = 4;
97 __myself.bytargetTime = paramArray.bytargettime || 1000;
98 __myself.bytargetTimer = null;
100 // counters for each command and applied delay
101 __myself.dumpFactor = 500;
102 __myself.showCounter = 0;
103 __myself.termCounter = 0;
104 __myself.statCounter = 0;
105 __myself.bytargetCounter = 0;
107 // active clients, updated by stat and show
108 // might be an issue since bytarget will poll accordingly
109 __myself.activeClients = 1;
111 // if in proxy mode no need to init
112 if (paramArray.usesessions != undefined) {
113 __myself.useSessions = paramArray.usesessions;
114 __myself.initStatusOK = true;
116 // else, auto init session or wait for a user init?
117 if (__myself.useSessions && paramArray.autoInit !== false) {
124 // stop activity by clearing tiemouts
127 clearTimeout(__myself.statTimer);
128 clearTimeout(__myself.showTimer);
129 clearTimeout(__myself.termTimer);
130 clearTimeout(__myself.bytargetTimer);
133 // reset status variables
136 if ( __myself.useSessions ) {
137 __myself.sessionID = null;
138 __myself.initStatusOK = false;
139 __myself.pingStatusOK = false;
141 __myself.searchStatusOK = false;
144 if ( __myself.resetCallback )
145 __myself.resetCallback();
148 init: function ( sessionId )
152 // session id as a param
153 if ( sessionId != undefined && __myself.useSessions ) {
154 __myself.initStatusOK = true;
155 __myself.sessionID = sessionId;
157 // old school direct pazpar2 init
158 } else if (__myself.useSessions) {
159 var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
161 { "command": "init" },
163 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
164 if ( data.getElementsByTagName("protocol")[0].childNodes[0].nodeValue
165 != __myself.suppProtoVer )
166 throw new Error("Server's protocol not supported by the client");
167 __myself.initStatusOK = true;
168 __myself.sessionID = data.getElementsByTagName("session")[0].childNodes[0].nodeValue;
169 setTimeout("__myself.ping()", __myself.keepAlive);
172 // if it gets here the http return code was 200 (pz2 errors are 417)
173 // but the response was invalid, it should never occur
174 setTimeout("__myself.init()", 1000);
177 // when through proxy no need to init
179 __myself.initStatusOK = true;
182 // no need to ping explicitly
185 // pinging only makes sense when using pazpar2 directly
186 if( !__myself.initStatusOK || !__myself.useSessions )
187 throw new Error('Pz2.js: Ping not allowed (proxy mode) or session not initialized.');
188 // session is not initialized code here
190 var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
192 { "command": "ping", "session": __myself.sessionID },
194 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
195 __myself.pingStatusOK = true;
196 setTimeout("__myself.ping()", __myself.keepAlive);
199 // if it gets here the http return code was 200 (pz2 errors are 417)
200 // but the response was invalid, it should never occur
201 setTimeout("__myself.ping()", 1000);
205 search: function (query, num, sort, filter, showfrom)
207 clearTimeout(__myself.statTimer);
208 clearTimeout(__myself.showTimer);
209 clearTimeout(__myself.termTimer);
210 clearTimeout(__myself.bytargetTimer);
212 __myself.showCounter = 0;
213 __myself.termCounter = 0;
214 __myself.bytargetCounter = 0;
215 __myself.statCounter = 0;
218 if( !__myself.initStatusOK )
219 throw new Error('Pz2.js: session not initialized.');
221 if( query !== undefined )
222 __myself.currQuery = query;
224 throw new Error("Pz2.js: no query supplied to the search command.");
226 if ( showfrom !== undefined )
227 var start = showfrom;
231 var searchParams = { "command": "search", "query": __myself.currQuery, "session": __myself.sessionID };
233 if (filter !== undefined)
234 searchParams["filter"] = filter;
236 var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
240 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
241 __myself.searchStatusOK = true;
243 __myself.show(start, num, sort);
244 if ( __myself.statCallback )
246 //__myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 4);
247 if ( __myself.termlistCallback )
249 //__myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 4);
250 if ( __myself.bytargetCallback )
252 //__myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 4);
255 // if it gets here the http return code was 200 (pz2 errors are 417)
256 // but the response was invalid, it should never occur
257 setTimeout("__myself.search(__myself.currQuery)", 500);
263 if( !__myself.initStatusOK )
264 throw new Error('Pz2.js: session not initialized.');
266 // if called explicitly takes precedence
267 clearTimeout(__myself.statTimer);
269 var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
271 { "command": "stat", "session": __myself.sessionID },
273 if ( data.getElementsByTagName("stat") ) {
274 var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
275 __myself.activeClients = activeClients;
277 "activeclients": activeClients,
278 "hits": Number( data.getElementsByTagName("hits")[0].childNodes[0].nodeValue ),
279 "records": Number( data.getElementsByTagName("records")[0].childNodes[0].nodeValue ),
280 "clients": Number( data.getElementsByTagName("clients")[0].childNodes[0].nodeValue ),
281 "initializing": Number( data.getElementsByTagName("initializing")[0].childNodes[0].nodeValue ),
282 "searching": Number( data.getElementsByTagName("searching")[0].childNodes[0].nodeValue ),
283 "presenting": Number( data.getElementsByTagName("presenting")[0].childNodes[0].nodeValue ),
284 "idle": Number( data.getElementsByTagName("idle")[0].childNodes[0].nodeValue ),
285 "failed": Number( data.getElementsByTagName("failed")[0].childNodes[0].nodeValue ),
286 "error": Number( data.getElementsByTagName("error")[0].childNodes[0].nodeValue )
289 __myself.statCounter++;
290 var delay = __myself.statTime + __myself.statCounter * __myself.dumpFactor;
291 if ( activeClients > 0 )
292 __myself.statTimer = setTimeout("__myself.stat()", delay);
293 __myself.statCallback(stat);
296 // if it gets here the http return code was 200 (pz2 errors are 417)
297 // but the response was invalid, it should never occur
298 __myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 4);
302 show: function(start, num, sort)
304 if( !__myself.searchStatusOK && __myself.useSessions )
305 throw new Error('Pz2.js: show command has to be preceded with a search command.');
307 // if called explicitly takes precedence
308 clearTimeout(__myself.showTimer);
310 if( sort !== undefined )
311 __myself.currentSort = sort;
312 if( start !== undefined )
313 __myself.currentStart = Number( start );
314 if( num !== undefined )
315 __myself.currentNum = Number( num );
317 var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
320 { "command": "show", "session": __myself.sessionID, "start": __myself.currentStart,
321 "num": __myself.currentNum, "sort": __myself.currentSort, "block": 1 },
323 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
324 // first parse the status data send along with records
325 // this is strictly bound to the format
326 var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
327 __myself.activeClients = activeClients;
329 "activeclients": activeClients,
330 "merged": Number( data.getElementsByTagName("merged")[0].childNodes[0].nodeValue ),
331 "total": Number( data.getElementsByTagName("total")[0].childNodes[0].nodeValue ),
332 "start": Number( data.getElementsByTagName("start")[0].childNodes[0].nodeValue ),
333 "num": Number( data.getElementsByTagName("num")[0].childNodes[0].nodeValue ),
336 // parse all the first-level nodes for all <hit> tags
337 var hits = data.getElementsByTagName("hit");
338 var hit = new Array();
339 for (i = 0; i < hits.length; i++) {
340 show.hits[i] = new Array();
341 show.hits[i]['location'] = new Array();
342 for ( j = 0; j < hits[i].childNodes.length; j++) {
344 if ( hits[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
345 if (hits[i].childNodes[j].nodeName == 'location') {
346 var locNode = hits[i].childNodes[j];
347 var id = locNode.getAttribute('id');
348 show.hits[i]['location'][id] = {
349 "id": locNode.getAttribute("id"),
350 "name": locNode.getAttribute("name")
354 var nodeName = hits[i].childNodes[j].nodeName;
355 var nodeText = 'ERROR'
356 if ( hits[i].childNodes[j].firstChild )
357 nodeText = hits[i].childNodes[j].firstChild.nodeValue;
358 show.hits[i][nodeName] = nodeText;
363 __myself.showCounter++;
364 var delay = __myself.showTime;
365 if (__myself.showCounter > __myself.showFastCount)
366 delay += __myself.showCounter * __myself.dumpFactor;
367 if ( activeClients > 0 )
368 __myself.showTimer = setTimeout("__myself.show()", delay);
370 __myself.showCallback(show);
373 // if it gets here the http return code was 200 (pz2 errors are 417)
374 // but the response was invalid, it should never occur
375 __myself.showTimer = setTimeout("__myself.show()", __myself.showTime / 4);
379 record: function(id, offset, params)
381 // we may call record with no previous search if in proxy mode
382 if( !__myself.searchStatusOK && __myself.useSessions)
383 throw new Error('Pz2.js: record command has to be preceded with a search command.');
385 if ( params == undefined )
388 if ( params.callback != undefined ) {
389 callback = params.callback;
391 callback = __myself.recordCallback;
395 if ( params['handle'] == undefined )
398 handle = params['handle'];
400 if( id !== undefined )
401 __myself.currRecID = id;
403 var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
405 var recordParams = { "command": "record",
406 "session": __myself.sessionID,
407 "id": __myself.currRecID };
409 if (offset !== undefined) {
410 recordParams["offset"] = offset;
413 if (params.syntax != undefined) {
414 recordParams['syntax'] = params.syntax;
417 __myself.currRecOffset = offset;
423 var record = new Array();
424 record['xmlDoc'] = data;
425 if (__myself.currRecOffset !== undefined) {
426 record['offset'] = __myself.currRecOffset;
427 callback(record, handle);
428 } else if ( recordNode = data.getElementsByTagName("record")[0] ) {
429 // if stylesheet was fetched do not parse the response
430 if ( __myself.xslDoc ) {
431 record['recid'] = recordNode.getElementsByTagName("recid")[0].firstChild.nodeValue;
432 record['xslDoc'] = __myself.xslDoc;
434 for ( i = 0; i < recordNode.childNodes.length; i++) {
435 if ( recordNode.childNodes[i].nodeType == Node.ELEMENT_NODE
436 && recordNode.childNodes[i].nodeName != 'location' ) {
437 var nodeName = recordNode.childNodes[i].nodeName;
438 var nodeText = recordNode.childNodes[i].firstChild.nodeValue;
439 record[nodeName] = nodeText;
442 // the location might be empty!!
443 var locationNodes = recordNode.getElementsByTagName("location");
444 record["location"] = new Array();
445 for ( i = 0; i < locationNodes.length; i++ ) {
446 record["location"][i] = {
447 "id": locationNodes[i].getAttribute("id"),
448 "name": locationNodes[i].getAttribute("name")
451 for ( j = 0; j < locationNodes[i].childNodes.length; j++) {
452 if ( locationNodes[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
453 var nodeName = locationNodes[i].childNodes[j].nodeName;
455 if (locationNodes[i].childNodes[j].firstChild)
456 nodeText = locationNodes[i].childNodes[j].firstChild.nodeValue;
457 record["location"][i][nodeName] = nodeText;
463 callback(record, handle);
466 // if it gets here the http return code was 200 (pz2 errors are 417)
467 // but the response was invalid, it should never occur
468 setTimeout("__myself.record(__myself.currRecID)", 500);
475 if( !__myself.searchStatusOK && __myself.useSessions )
476 throw new Error('Pz2.js: termlist command has to be preceded with a search command.');
478 // if called explicitly takes precedence
479 clearTimeout(__myself.termTimer);
481 var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
483 { "command": "termlist", "session": __myself.sessionID, "name": __myself.termKeys },
485 if ( data.getElementsByTagName("termlist") ) {
486 var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
487 __myself.activeClients = activeClients;
488 var termList = { "activeclients": activeClients };
489 var termLists = data.getElementsByTagName("list");
491 for (i = 0; i < termLists.length; i++) {
492 var listName = termLists[i].getAttribute('name');
493 termList[listName] = new Array();
494 var terms = termLists[i].getElementsByTagName('term');
495 //for each term in the list
496 for (j = 0; j < terms.length; j++) {
498 "name": (terms[j].getElementsByTagName("name")[0].childNodes.length
499 ? terms[j].getElementsByTagName("name")[0].childNodes[0].nodeValue
501 "freq": terms[j].getElementsByTagName("frequency")[0].childNodes[0].nodeValue || 'ERROR'
504 var termIdNode = terms[j].getElementsByTagName("id");
505 if(terms[j].getElementsByTagName("id").length)
506 term["id"] = termIdNode[0].childNodes[0].nodeValue;
508 termList[listName][j] = term;
512 __myself.termCounter++;
513 var delay = __myself.termTime + __myself.termCounter * __myself.dumpFactor;
514 if ( activeClients > 0 )
515 __myself.termTimer = setTimeout("__myself.termlist()", delay);
517 __myself.termlistCallback(termList);
520 // if it gets here the http return code was 200 (pz2 errors are 417)
521 // but the response was invalid, it should never occur
522 __myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 4);
529 if( !__myself.initStatusOK && __myself.useSessions )
530 throw new Error('Pz2.js: bytarget command has to be preceded with a search command.');
532 // no need to continue
533 if( !__myself.searchStatusOK )
536 // if called explicitly takes precedence
537 clearTimeout(__myself.bytargetTimer);
539 var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
541 { "command": "bytarget", "session": __myself.sessionID },
543 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
544 var targetNodes = data.getElementsByTagName("target");
545 var bytarget = new Array();
546 for ( i = 0; i < targetNodes.length; i++) {
547 bytarget[i] = new Array();
548 for( j = 0; j < targetNodes[i].childNodes.length; j++ ) {
549 if ( targetNodes[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
550 var nodeName = targetNodes[i].childNodes[j].nodeName;
551 var nodeText = targetNodes[i].childNodes[j].firstChild.nodeValue;
552 bytarget[i][nodeName] = nodeText;
557 __myself.bytargetCounter++;
558 var delay = __myself.bytargetTime + __myself.bytargetCounter * __myself.dumpFactor;
559 if ( __myself.activeClients > 0 )
560 __myself.bytargetTimer = setTimeout("__myself.bytarget()", delay);
562 __myself.bytargetCallback(bytarget);
565 // if it gets here the http return code was 200 (pz2 errors are 417)
566 // but the response was invalid, it should never occur
567 __myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 4);
572 // just for testing, probably shouldn't be here
573 showNext: function(page)
575 var step = page || 1;
576 __myself.show( ( step * __myself.currentNum ) + __myself.currentStart );
579 showPrev: function(page)
581 if (__myself.currentStart == 0 )
583 var step = page || 1;
584 var newStart = __myself.currentStart - (step * __myself.currentNum );
585 __myself.show( newStart > 0 ? newStart : 0 );
588 showPage: function(pageNum)
590 //var page = pageNum || 1;
591 __myself.show(pageNum * __myself.currentNum);
596 *********************************************************************************
597 ** AJAX HELPER CLASS ************************************************************
598 *********************************************************************************
600 var pzHttpRequest = function ( url, errorHandler ) {
603 this.errorHandler = errorHandler || null;
606 if ( window.XMLHttpRequest ) {
607 this.request = new XMLHttpRequest();
608 } else if ( window.ActiveXObject ) {
610 this.request = new ActiveXObject( 'Msxml2.XMLHTTP' );
612 this.request = new ActiveXObject( 'Microsoft.XMLHTTP' );
617 pzHttpRequest.prototype =
619 get: function ( params, callback )
621 this._send( 'GET', params, '', callback );
624 post: function ( params, data, callback )
626 this._send( 'POST', params, data, callback );
632 this.request.open( 'GET', this.url, this.async );
633 this.request.send('');
634 if ( this.request.status == 200 )
635 return this.request.responseXML;
638 _send: function ( type, params, data, callback )
640 this.callback = callback;
643 this.request.open( type, this._urlAppendParams(params), this.async );
644 this.request.onreadystatechange = function () {
645 context._handleResponse();
647 this.request.send(data);
650 _urlAppendParams: function (params)
652 var getUrl = this.url;
656 for (var key in el) {
657 if (el[key] != null) {
658 getUrl += sep + key + '=' + encodeURIComponent(el[key]);
665 _handleResponse: function ()
667 if ( this.request.readyState == 4 ) {
668 // pick up pazpr2 errors first
669 if ( this.request.responseXML
670 && this.request.responseXML.documentElement.nodeName == 'error'
671 && this.request.responseXML.getElementsByTagName("error").length ) {
673 if ( this.request.responseXML.getElementsByTagName("error")[0].childNodes.length )
674 errAddInfo = ': ' + this.request.responseXML.getElementsByTagName("error")[0].childNodes[0].nodeValue;
675 var errMsg = this.request.responseXML.getElementsByTagName("error")[0].getAttribute("msg");
676 var errCode = this.request.responseXML.getElementsByTagName("error")[0].getAttribute("code");
678 var err = new Error(errMsg + errAddInfo);
681 if (this.errorHandler) {
682 this.errorHandler(err);
687 } else if ( this.request.status == 200 ) {
688 this.callback( this.request.responseXML );
690 var err = new Error("Pz2.js: HTTP request error (AJAX). Code: "
691 + this.request.status + " Info: "
692 + this.request.statusText );
695 if (this.errorHandler) {
696 this.errorHandler(err);
707 *********************************************************************************
708 ** XML HELPER CLASS ************************************************************
709 *********************************************************************************
714 if ( window.ActiveXObject) {
715 var DOMDoc = document;
717 var DOMDoc = Document.prototype;
720 DOMDoc.newXmlDoc = function ( root )
724 if (document.implementation && document.implementation.createDocument) {
725 doc = document.implementation.createDocument('', root, null);
726 } else if ( window.ActiveXObject ) {
727 doc = new ActiveXObject("MSXML2.DOMDocument");
728 doc.loadXML('<' + root + '/>');
730 throw new Error ('No XML support in this browser');
737 DOMDoc.parseXmlFromString = function ( xmlString )
741 if ( window.DOMParser ) {
742 var parser = new DOMParser();
743 doc = parser.parseFromString( xmlString, "text/xml");
744 } else if ( window.ActiveXObject ) {
745 doc = new ActiveXObject("MSXML2.DOMDocument");
746 doc.loadXML( xmlString );
748 throw new Error ("No XML parsing support in this browser.");
756 Element_removeFromDoc = function (DOM_Element)
758 DOM_Element.parentNode.removeChild(DOM_Element);
761 Element_emptyChildren = function (DOM_Element)
763 while( DOM_Element.firstChild ) {
764 DOM_Element.removeChild( DOM_Element.firstChild )
768 Element_appendTransformResult = function ( DOM_Element, xmlDoc, xslDoc )
770 if ( window.XSLTProcessor ) {
771 var proc = new XSLTProcessor();
772 proc.importStylesheet( xslDoc );
774 docFrag = proc.transformToFragment( xmlDoc, DOM_Element.ownerDocument );
775 DOM_Element.appendChild(docFrag);
776 } else if ( window.ActiveXObject ) {
777 DOM_Element.innerHTML = xmlDoc.transformNode( xslDoc );
779 alert( 'Unable to perform XSLT transformation in this browser' );
783 Element_appendTextNode = function (DOM_Element, tagName, textContent )
785 var node = DOM_Element.ownerDocument.createElement(tagName);
786 var text = DOM_Element.ownerDocument.createTextNode(textContent);
788 DOM_Element.appendChild(node);
789 node.appendChild(text);
794 Element_setTextContent = function ( DOM_Element, textContent )
796 if (typeof DOM_Element.textContent !== "undefined") {
797 DOM_Element.textContent = textContent;
798 } else if (typeof DOM_Element.innerText !== "undefined" ) {
799 DOM_Element.innerText = textContent;
801 throw new Error("Cannot set text content of the node, no such method.");
805 Element_getTextContent = function (DOM_Element)
807 if ( typeof DOM_Element.textContent != 'undefined' ) {
808 return DOM_Element.textContent;
809 } else if (typeof DOM_Element.text != 'undefined') {
810 return DOM_Element.text;
812 throw new Error("Cannot get text content of the node, no such method.");
817 *********************************************************************************
818 ** QUERY CLASS ******************************************************************
819 *********************************************************************************
822 var pzFilter = function()
824 this.filterHash = new Array();
830 addFilter: function(name, value)
832 var filter = {"name": name, "id": value };
833 this.filterHash[this.filterHash.length] = filter;
835 return this.filterHash.length - 1;
838 setFilter: function(name, value)
840 this.filterHash = new Array();
842 this.addFilter(name, value);
845 getFilter: function(index)
847 return this.filterHash[index].id;
850 getFilterName: function(index)
852 return this.filterHash[index].name;
855 removeFilter: function(index)
857 delete this.filterHash[index];
861 clearFilter: function()
863 this.filterHash = new Array();
867 getFilterString: function()
869 if( this.filterNums <= 0 ) {
873 var filter = 'pz:id=';
874 for(var i = 0; i < this.filterHash.length; i++)
876 if (this.filterHash[i] == undefined) continue;
877 if (filter > 'pz:id=') filter = filter + '|';
878 filter += this.filterHash[i].id;
884 var mkState = function()
886 this.sort = 'relevance';
889 this.simpleQuery = '';
890 this.singleFilter = null;
891 this.advTerms = new Array();
900 this.simpleQuery = '';
901 this.advTerms = new Array();
902 this.simpleFilter = null;
906 clearSimpleQuery: function()
908 this.simpleQuery = '';
911 addTerm: function(field, value)
913 var term = {"field": field, "value": value};
914 this.advTerms[this.numTerms] = term;
918 getTermValueByIdx: function(index)
920 return this.advTerms[index].value;
923 getTermFieldByIdx: function(index)
925 return this.advTerms[index].field;
928 /* semicolon separated list of terms for given field*/
929 getTermsByField: function(field)
932 for(var i = 0; i < this.advTerms.length; i++)
934 if( this.advTerms[i].field == field )
935 terms = terms + this.queryHas[i].value + ';';
940 addTermsFromList: function(inputString, field)
942 var inputArr = inputString.split(';');
943 for(var i=0; i < inputArr.length; i++)
945 if(inputArr[i].length < 3) continue;
946 this.advTerms[this.numTerms]
947 = {"field": field, "value": inputArr[i] };
952 removeTermByIdx: function(index)
954 this.advTerms.splice(index, 1);
961 if( this.simpleQuery != '')
962 ccl = this.simpleQuery;
963 for(var i = 0; i < this.advTerms.length; i++)
965 if (ccl != '') ccl = ccl + ' and ';
966 ccl = ccl + this.advTerms[i].field
967 +'="'+this.advTerms[i].value+'"';
972 totalLength: function()
974 var simpleLength = this.simpleQuery != '' ? 1 : 0;
975 return this.advTerms.length + simpleLength;
978 clearSingleFilter: function()
980 this.singleFilter = null;
983 setSingleFilter: function(name, value)
985 this.singleFilter = {"name": name, "id": value };
988 getSingleFilterName: function()
990 return this.singleFilter.name;
993 getSingleFilterString: function()
995 if( this.singleFilter != null ) {
996 return 'pz:id='+this.singleFilter.id;