100 lines
3.7 KiB
JavaScript
100 lines
3.7 KiB
JavaScript
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//>>built
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define("dojox/data/util/JsonQuery", ["dojo", "dojox"], function(dojo, dojox) {
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// this is a mixin to convert object attribute queries to
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// JSONQuery/JSONPath syntax to be sent to the server.
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dojo.declare("dojox.data.util.JsonQuery", null, {
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useFullIdInQueries: false,
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_toJsonQuery: function(args, jsonQueryPagination){
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var first = true;
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var self = this;
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function buildQuery(path, query){
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var isDataItem = query.__id;
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if(isDataItem){
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// it is a reference to a persisted object, need to make it a query by id
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var newQuery = {};
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newQuery[self.idAttribute] = self.useFullIdInQueries ? query.__id : query[self.idAttribute];
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query = newQuery;
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}
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for(var i in query){
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// iterate through each property, adding them to the overall query
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var value = query[i];
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var newPath = path + (/^[a-zA-Z_][\w_]*$/.test(i) ? '.' + i : '[' + dojo._escapeString(i) + ']');
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if(value && typeof value == "object"){
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buildQuery(newPath, value);
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}else if(value!="*"){ // full wildcards can be ommitted
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jsonQuery += (first ? "" : "&") + newPath +
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((!isDataItem && typeof value == "string" && args.queryOptions && args.queryOptions.ignoreCase) ? "~" : "=") +
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(self.simplifiedQuery ? encodeURIComponent(value) : dojo.toJson(value));
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first = false;
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}
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}
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}
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// performs conversion of Dojo Data query objects and sort arrays to JSONQuery strings
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if(args.query && typeof args.query == "object"){
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// convert Dojo Data query objects to JSONQuery
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var jsonQuery = "[?(";
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buildQuery("@", args.query);
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if(!first){
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// use ' instead of " for quoting in JSONQuery, and end with ]
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jsonQuery += ")]";
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}else{
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jsonQuery = "";
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}
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args.queryStr = jsonQuery.replace(/\\"|"/g,function(t){return t == '"' ? "'" : t;});
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}else if(!args.query || args.query == '*'){
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args.query = "";
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}
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var sort = args.sort;
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if(sort){
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// if we have a sort order, add that to the JSONQuery expression
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args.queryStr = args.queryStr || (typeof args.query == 'string' ? args.query : "");
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first = true;
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for(i = 0; i < sort.length; i++){
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args.queryStr += (first ? '[' : ',') + (sort[i].descending ? '\\' : '/') + "@[" + dojo._escapeString(sort[i].attribute) + "]";
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first = false;
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}
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args.queryStr += ']';
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}
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// this is optional because with client side paging JSONQuery doesn't yield the total count
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if(jsonQueryPagination && (args.start || args.count)){
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// pagination
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args.queryStr = (args.queryStr || (typeof args.query == 'string' ? args.query : "")) +
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'[' + (args.start || '') + ':' + (args.count ? (args.start || 0) + args.count : '') + ']';
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}
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if(typeof args.queryStr == 'string'){
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args.queryStr = args.queryStr.replace(/\\"|"/g,function(t){return t == '"' ? "'" : t;});
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return args.queryStr;
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}
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return args.query;
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},
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jsonQueryPagination: true,
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fetch: function(args){
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this._toJsonQuery(args, this.jsonQueryPagination);
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return this.inherited(arguments);
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},
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isUpdateable: function(){
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return true;
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},
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matchesQuery: function(item,request){
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request._jsonQuery = request._jsonQuery || dojox.json.query(this._toJsonQuery(request));
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return request._jsonQuery([item]).length;
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},
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clientSideFetch: function(/*Object*/ request,/*Array*/ baseResults){
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request._jsonQuery = request._jsonQuery || dojox.json.query(this._toJsonQuery(request));
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// we use client side paging function here instead of JSON Query because we must also determine the total count
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return this.clientSidePaging(request, request._jsonQuery(baseResults));
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},
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querySuperSet: function(argsSuper,argsSub){
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if(!argsSuper.query){
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return argsSub.query;
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}
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return this.inherited(arguments);
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}
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});
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return dojox.data.util.JsonQuery;
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});
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