src/com/cognitect/transit/handlers.js
// Copyright 2014 Cognitect. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
goog.provide("com.cognitect.transit.handlers");
goog.require("com.cognitect.transit.util");
goog.require("com.cognitect.transit.types");
goog.require("goog.math.Long");
goog.scope(function() {
var handlers = com.cognitect.transit.handlers,
util = com.cognitect.transit.util,
types = com.cognitect.transit.types,
Long = goog.math.Long;
handlers.ctorGuid = 0;
/**
* @const
* @type {string}
*/
handlers.ctorGuidProperty = "transit$guid$" + util.randomUUID();
handlers.typeTag = function(ctor) {
if(ctor == null) {
return "null";
} else if(ctor === String) {
return "string";
} else if(ctor === Boolean) {
return "boolean";
} else if(ctor === Number) {
return "number";
} else if(ctor === Array) {
return "array";
} else if(ctor === Object) {
return "map";
} else {
var tag = ctor[handlers.ctorGuidProperty];
if(tag == null) {
if(typeof Object.defineProperty != "undefined") {
tag = ++handlers.ctorGuid;
Object.defineProperty(ctor, handlers.ctorGuidProperty, {
value: tag,
enumerable: false
});
} else {
ctor[handlers.ctorGuidProperty] = tag = ++handlers.ctorGuid;
}
}
return tag;
}
};
handlers.constructor = function(x) {
if(x == null) {
return null;
} else {
return x.constructor;
}
};
handlers.padZeros = function(n,m) {
var s = n.toString();
for(var i = s.length; i < m; i++) {
s = "0"+s;
}
return s;
};
handlers.stringableKeys = function(m) {
var stringable = false,
ks = util.objectKeys(m);
for(var i = 0; i < ks.length; i++) {
}
return true;
};
/**
* @constructor
*/
handlers.NilHandler = function(){};
handlers.NilHandler.prototype.tag = function(v) { return "_"; };
handlers.NilHandler.prototype.rep = function(v) { return null; };
handlers.NilHandler.prototype.stringRep = function(v) { return "null"; };
/**
* @constructor
*/
handlers.StringHandler = function(){};
handlers.StringHandler.prototype.tag = function(v) { return "s"; };
handlers.StringHandler.prototype.rep = function(v) { return v; };
handlers.StringHandler.prototype.stringRep = function(v) { return v; };
/**
* @constructor
*/
handlers.NumberHandler = function(){};
handlers.NumberHandler.prototype.tag = function(v) { return "i"; };
handlers.NumberHandler.prototype.rep = function(v) { return v; };
handlers.NumberHandler.prototype.stringRep = function(v) { return v.toString(); };
/**
* @constructor
*/
handlers.IntegerHandler = function(){};
handlers.IntegerHandler.prototype.tag = function(v) { return "i"; };
handlers.IntegerHandler.prototype.rep = function(v) { return v.toString(); };
handlers.IntegerHandler.prototype.stringRep = function(v) { return v.toString(); };
/**
* @constructor
*/
handlers.BooleanHandler = function(){};
handlers.BooleanHandler.prototype.tag = function(v) { return "?"; };
handlers.BooleanHandler.prototype.rep = function(v) { return v; };
handlers.BooleanHandler.prototype.stringRep = function(v) { return v.toString(); };
/**
* @constructor
*/
handlers.ArrayHandler = function(){};
handlers.ArrayHandler.prototype.tag = function(v) { return "array"; };
handlers.ArrayHandler.prototype.rep = function(v) { return v; };
handlers.ArrayHandler.prototype.stringRep = function(v) { return null; };
/**
* @constructor
*/
handlers.MapHandler = function(){};
handlers.MapHandler.prototype.tag = function(v) { return "map"; };
handlers.MapHandler.prototype.rep = function(v) { return v; };
handlers.MapHandler.prototype.stringRep = function(v) { return null; };
/**
* @constructor
*/
handlers.VerboseDateHandler = function(){};
handlers.VerboseDateHandler.prototype.tag = function(v) { return "t"; };
handlers.VerboseDateHandler.prototype.rep = function(v) {
return v.getUTCFullYear()+"-"+handlers.padZeros(v.getUTCMonth()+1,2)+"-"+
handlers.padZeros(v.getUTCDate(),2)+"T"+handlers.padZeros(v.getUTCHours(),2)+":"+
handlers.padZeros(v.getUTCMinutes(),2)+":"+handlers.padZeros(v.getUTCSeconds(),2)+"."+
handlers.padZeros(v.getUTCMilliseconds(),3)+"Z";
};
handlers.VerboseDateHandler.prototype.stringRep = function(v, h) {
return h.rep(v);
};
/**
* @constructor
*/
handlers.DateHandler = function(){};
handlers.DateHandler.prototype.tag = function(v) { return "m"; };
handlers.DateHandler.prototype.rep = function(v) { return v.valueOf(); };
handlers.DateHandler.prototype.stringRep = function(v) { return v.valueOf().toString(); };
handlers.DateHandler.prototype.getVerboseHandler = function(v) {
return new handlers.VerboseDateHandler();
};
/**
* @constructor
*/
handlers.UUIDHandler = function(){};
handlers.UUIDHandler.prototype.tag = function(v) { return "u"; };
handlers.UUIDHandler.prototype.rep = function(v) { return v.toString(); };
handlers.UUIDHandler.prototype.stringRep = function(v) { return v.toString(); };
/**
* @constructor
*/
handlers.KeywordHandler = function(){};
handlers.KeywordHandler.prototype.tag = function(v) { return ":"; };
handlers.KeywordHandler.prototype.rep = function(v) { return v.name; }; // NOTE: should be fqn
handlers.KeywordHandler.prototype.stringRep = function(v, h) { return h.rep(v); };
/**
* @constructor
*/
handlers.SymbolHandler = function(){};
handlers.SymbolHandler.prototype.tag = function(v) { return "$"; };
handlers.SymbolHandler.prototype.rep = function(v) { return v.name; }; // NOTE: should be str
handlers.SymbolHandler.prototype.stringRep = function(v, h) { return h.rep(v); };
/**
* @constructor
*/
handlers.TaggedHandler = function(){};
handlers.TaggedHandler.prototype.tag = function(v) { return v.tag; };
handlers.TaggedHandler.prototype.rep = function(v) { return v.rep; };
handlers.TaggedHandler.prototype.stringRep = function(v, h) { return null; };
/**
* @constructor
*/
handlers.TransitSetHandler = function(){};
handlers.TransitSetHandler.prototype.tag = function(v) { return "set"; };
handlers.TransitSetHandler.prototype.rep = function(v) {
var arr = [];
v.forEach(function(key, set) {
arr.push(key);
});
return types.taggedValue("array", arr);
};
handlers.TransitSetHandler.prototype.stringRep = function(v, h) { return null; };
/**
* @constructor
*/
handlers.TransitArrayMapHandler = function(){};
handlers.TransitArrayMapHandler.prototype.tag = function(v) { return "map"; };
handlers.TransitArrayMapHandler.prototype.rep = function(v) { return v; };
handlers.TransitArrayMapHandler.prototype.stringRep = function(v, h) { return null; };
/**
* @constructor
*/
handlers.TransitMapHandler = function(){};
handlers.TransitMapHandler.prototype.tag = function(v) { return "map"; };
handlers.TransitMapHandler.prototype.rep = function(v) { return v; };
handlers.TransitMapHandler.prototype.stringRep = function(v, h) { return null; };
/**
* @constructor
*/
handlers.BufferHandler = function() {};
handlers.BufferHandler.prototype.tag = function(v) { return "b"; };
handlers.BufferHandler.prototype.rep = function(v) { return v.toString("base64"); };
handlers.BufferHandler.prototype.stringRep = function(v, h) { return null; };
/**
* @constructor
*/
handlers.Uint8ArrayHandler = function() {};
handlers.Uint8ArrayHandler.prototype.tag = function(v) { return "b"; };
handlers.Uint8ArrayHandler.prototype.rep = function(v) { return util.Uint8ToBase64(v); };
handlers.Uint8ArrayHandler.prototype.stringRep = function(v, h) { return null; };
handlers.defaultHandlers = function(hs) {
hs.set(null, new handlers.NilHandler());
hs.set(String, new handlers.StringHandler());
hs.set(Number, new handlers.NumberHandler());
hs.set(Long, new handlers.IntegerHandler());
hs.set(Boolean, new handlers.BooleanHandler());
hs.set(Array, new handlers.ArrayHandler());
hs.set(Object, new handlers.MapHandler());
hs.set(Date, new handlers.DateHandler());
hs.set(types.UUID, new handlers.UUIDHandler());
hs.set(types.Keyword, new handlers.KeywordHandler());
hs.set(types.Symbol, new handlers.SymbolHandler());
hs.set(types.TaggedValue, new handlers.TaggedHandler());
hs.set(types.TransitSet, new handlers.TransitSetHandler());
hs.set(types.TransitArrayMap, new handlers.TransitArrayMapHandler());
hs.set(types.TransitMap, new handlers.TransitMapHandler());
if(typeof Buffer != "undefined") {
hs.set(Buffer, new handlers.BufferHandler());
}
if(typeof Uint8Array != "undefined") {
hs.set(Uint8Array, new handlers.Uint8ArrayHandler());
}
return hs;
};
/**
* @constructor
*/
handlers.Handlers = function() {
this.handlers = {};
handlers.defaultHandlers(this);
};
handlers.Handlers.prototype.get = function(ctor) {
var h = null;
if(typeof ctor === "string") {
h = this.handlers[ctor];
} else {
h = this.handlers[handlers.typeTag(ctor)];
}
if(h != null) {
return h;
} else {
return this.handlers["default"];
}
};
handlers.Handlers.prototype["get"] = handlers.Handlers.prototype.get;
handlers.validTag = function(tag) {
switch(tag) {
case "null":
case "string":
case "boolean":
case "number":
case "array":
case "map":
return false;
break;
}
return true;
};
handlers.Handlers.prototype.set = function(ctor, handler) {
if(typeof ctor === "string" && handlers.validTag(ctor)) {
this.handlers[ctor] = handler;
} else {
this.handlers[handlers.typeTag(ctor)] = handler;
}
};
});