+++ /dev/null
-if(!dojo._hasResource["dojox.rpc.JsonReferencing"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
-dojo._hasResource["dojox.rpc.JsonReferencing"] = true;
-dojo.provide("dojox.rpc.JsonReferencing");
-dojo.require("dojo.date.stamp");
-dojo.require("dojo._base.Deferred");
-
-// summary:
-// Adds advanced JSON {de}serialization capabilities to the base json library.
-// This enhances the capabilities of dojo.toJson and dojo.fromJson,
-// adding referencing support, date handling, and other extra format handling.
-// On parsing, references are resolved. When references are made to
-// ids/objects that have been loaded yet, a Deferred object will be used as the
-// value and as soon as a callback is added to the Deferred object, the target
-// object will be loaded.
-
-
-
-dojox.rpc._index={}; // the global map of id->object
-dojox.rpc.onUpdate = function(/*Object*/ object, /* attribute-name-string */ attribute, /* any */ oldValue, /* any */ newValue){
- // summary:
- // This function is called when an existing object in the system is updated. Existing objects are found by id.
-};
-
-dojox.rpc.resolveJson = function(/*Object*/ root,/*Object?*/ schema){
- // summary:
- // Indexes and resolves references in the JSON object.
- // A JSON Schema object that can be used to advise the handling of the JSON (defining ids, date properties, urls, etc)
- //
- // root:
- // The root object of the object graph to be processed
- //
- // schema: A JSON Schema object that can be used to advise the parsing of the JSON (defining ids, date properties, urls, etc) //
- // Currently this provides a means for context based id handling
- //
- // return:
- // An object, the result of the processing
- var ref,reWalk=[];
- function makeIdInfo(schema){ // find out what attribute and what id prefix to use
- if (schema){
- var attr;
- if (!(attr = schema._idAttr)){
- for (var i in schema.properties){
- if (schema.properties[i].unique){
- schema._idAttr = attr = i;
- }
- }
- }
- if (attr || schema._idPrefix){
- return {attr:attr || 'id',prefix:schema._idPrefix};
- }
- }
-
- return false;
- }
- function walk(it,stop,schema,idInfo,defaultId){
- // this walks the new graph, resolving references and making other changes
- var val,i;
- var id = it[idInfo.attr];
- id = (id && (idInfo.prefix + id)) || defaultId; // if there is an id, prefix it, otherwise inherit
- var target = it;
-
- if (id){ // if there is an id available...
- it._id = id;
- if (dojox.rpc._index[id]){ // if the id already exists in the system, we should use the existing object, and just update it
- target = dojox.rpc._index[id];
- delete target.$ref; // remove this artifact
- }
- dojox.rpc._index[id] = target; // add the prefix, set _id, and index it
- if (schema && dojox.validate && dojox.validate.jsonSchema){ // if json schema is activated, we can load it in the registry of instance schemas map
- dojox.validate.jsonSchema._schemas[id] = schema;
- }
-
- }
- for (i in it){
- if (it.hasOwnProperty(i) && (typeof (val=it[i]) =='object') && val){
- ref=val.$ref;
- if (ref){ // a reference was found
- var stripped = ref.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');// trim it
- if(/[\w\[\]\.\$ \/\r\n\t]/.test(stripped) && !/=|((^|\W)new\W)/.test(stripped)){ // make sure it is a safe reference
- var path = ref.match(/(^\.*[^\.\[]+)([\.\[].*)?/); // divide along the path
- if ((ref=path[1]=='$' ? root:dojox.rpc._index[new dojo._Url(idInfo.prefix,path[1])]) && // a $ indicates to start with the root, otherwise start with an id
- (ref = path[2] ? eval('ref' + path[2]) : ref)){// starting point was found, use eval to resolve remaining property references
- // otherwise, no starting point was found (id not found), if stop is set, it does not exist, we have
- // unloaded reference, if stop is not set, it may be in a part of the graph not walked yet,
- // we will wait for the second loop
- val = ref;
- }
- else{
- if (!stop){
- if (!rewalking)
- reWalk.push(it); // we need to rewalk it to resolve references
- var rewalking = true; // we only want to add it once
- }
- else {
- ref = val.$ref;
- val = new dojo.Deferred();
- val._id = idInfo.prefix + ref;
- (function(val,ref){
- var connectId = dojo.connect(val,"addCallbacks",function(){
- dojo.disconnect(connectId);
- dojox.rpc.services[idInfo.prefix.substring(0,idInfo.prefix.length-1)](ref) // otherwise call by looking up the service
- .addCallback(dojo.hitch(val,val.callback));
-
- });
- })(val,ref);
- }
- }
- }
- }
- else {
- if (!stop){ // if we are in stop, that means we are in the second loop, and we only need to check this current one,
- // further walking may lead down circular loops
- var valSchema = val.schema || // a schema can be self-defined by the object,
- (schema && schema.properties && schema.properties[i]); // or it can from the schema sub-object definition
- if (valSchema){
- idInfo = makeIdInfo(valSchema)||idInfo;
- }
- val = walk(val,reWalk==it,valSchema,idInfo,id && (id + ('[' + dojo._escapeString(i) + ']')));
- }
- }
- }
- if (dojo.isString(val) && schema && schema.properties && schema.properties[i] && schema.properties[i].format=='date-time'){// parse the date string
- val = dojo.date.stamp.fromISOString(val); // create a date object
- }
- it[i] = val;
- var old = target[i];
- if (val !== old){ // only update if it changed
- target[i] = val; // update the target
- propertyChange(i,old,val);
- }
- }
- function propertyChange(key,old,newValue){
- setTimeout(function(){
- dojox.rpc.onUpdate(target,i,old,newValue); // call the listener for each update
- });
- }
- if (target != it){ // this means we are updating, we need to remove deleted
- for (i in target){
- if (!it.hasOwnProperty(i) && i != '_id' && !(target instanceof Array && isNaN(i))){
- propertyChange(i,target[i],undefined);
- delete target[i];
- }
- }
- }
- return target;
- }
- var idInfo = makeIdInfo(schema)||{attr:'id',prefix:''};
- if (!root){ return root; }
- root = walk(root,false,schema,idInfo,dojox._newId && (new dojo._Url(idInfo.prefix,dojox._newId) +'')); // do the main walk through
- walk(reWalk,false,schema,idInfo); // re walk any parts that were not able to resolve references on the first round
- return root;
-};
-dojox.rpc.fromJson = function(/*String*/ str,/*Object?*/ schema){
- // summary:
- // evaluates the passed string-form of a JSON object.
- // A JSON Schema object that can be used to advise the parsing of the JSON (defining ids, date properties, urls, etc)
- // which may defined by setting dojox.currentSchema to the current schema you want to use for this evaluation
- //
- // json:
- // a string literal of a JSON item, for instance:
- // '{ "foo": [ "bar", 1, { "baz": "thud" } ] }'
- // schema: A JSON Schema object that can be used to advise the parsing of the JSON (defining ids, date properties, urls, etc) //
- // Currently this provides a means for context based id handling
- //
- // return:
- // An object, the result of the evaluation
- root = eval('(' + str + ')'); // do the eval
- if (root){
- return this.resolveJson(root,schema);
- }
- return root;
-}
-dojox.rpc.toJson = function(/*Object*/ it, /*Boolean?*/ prettyPrint, /*Object?*/ schema){
- // summary:
- // Create a JSON serialization of an object.
- // This has support for referencing, including circular references, duplicate references, and out-of-message references
- // id and path-based referencing is supported as well and is based on http://www.json.com/2007/10/19/json-referencing-proposal-and-library/.
- //
- // it:
- // an object to be serialized.
- //
- // prettyPrint:
- // if true, we indent objects and arrays to make the output prettier.
- // The variable dojo.toJsonIndentStr is used as the indent string
- // -- to use something other than the default (tab),
- // change that variable before calling dojo.toJson().
- //
- // schema: A JSON Schema object that can be used to advise the parsing of the JSON (defining ids, date properties, urls, etc) //
- // Currently this provides a means for context based id handling
- //
- // return:
- // a String representing the serialized version of the passed object.
-
- var idPrefix = (schema&& schema._idPrefix) || ''; // the id prefix for this context
- var paths={};
- function serialize(it,path,_indentStr){
- if (it && dojo.isObject(it)){
- var value;
- if (it instanceof Date){ // properly serialize dates
- return '"' + dojo.date.stamp.toISOString(it,{zulu:true}) + '"';
- }
- var id = it._id;
- if (id){ // we found an identifiable object, we will just serialize a reference to it... unless it is the root
-
- if (path != '$'){
- return serialize({$ref:id.charAt(0)=='$' ? id : // a pure path based reference, leave it alone
- id.substring(0,idPrefix.length)==idPrefix ? // see if the reference is in the current context
- id.substring(idPrefix.length): // a reference with a prefix matching the current context, the prefix should be removed
- '../' + id});// a reference to a different context, assume relative url based referencing
- }
- path = id;
- }
- else {
- it._id = path; // we will create path ids for other objects in case they are circular
- paths[path] = it;// save it here so they can be deleted at the end
- }
- _indentStr = _indentStr || "";
- var nextIndent = prettyPrint ? _indentStr + dojo.toJsonIndentStr : "";
- var newLine = prettyPrint ? "\n" : "";
- var sep = prettyPrint ? " " : "";
-
- if (it instanceof Array){
- var res = dojo.map(it, function(obj,i){
- var val = serialize(obj, path + '[' + i + ']', nextIndent);
- if(!dojo.isString(val)){
- val = "undefined";
- }
- return newLine + nextIndent + val;
- });
- return "[" + res.join("," + sep) + newLine + _indentStr + "]";
- }
-
- var output = [];
- for(var i in it){
- var keyStr;
- if(typeof i == "number"){
- keyStr = '"' + i + '"';
- }else if(dojo.isString(i) && i != '_id'){
- keyStr = dojo._escapeString(i);
- }else{
- // skip non-string or number keys
- continue;
- }
- var val = serialize(it[i],path+(i.match(/^[a-zA-Z]\w*$/) ? // can we use simple .property syntax?
- ('.' + i) : // yes, otherwise we have to escape it
- ('[' + dojo._escapeString(i) + ']')),nextIndent);
- if(!dojo.isString(val)){
- // skip non-serializable values
- continue;
- }
- output.push(newLine + nextIndent + keyStr + ":" + sep + val);
- }
- return "{" + output.join("," + sep) + newLine + _indentStr + "}";
- }
-
- return dojo.toJson(it); // use the default serializer for primitives
- }
- var json = serialize(it,'$','');
- for (i in paths){ // cleanup the temporary path-generated ids
- delete paths[i]._id;
- }
- return json;
-}
-
-}
projects / eow / blobdiff