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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
/**
* JSON data conversion functions.
*/
var json = {};
/**
* JSON exceptions.
*/
json.Exception = function(code, message) {
this.name = "JSONException";
this.code = code;
this.message = message;
};
json.Exception.prototype = new Error();
json.Exception.prototype.toString = function() {
return this.name + ": " + this.message;
};
/**
* Return true if a list represents a JS array.
*/
json.isJSArray = function(l) {
if (isNull(l))
return true;
var v = car(l);
if (isSymbol(v))
return false;
if (isList(v))
if (!isNull(v) && isSymbol(car(v)))
return false;
return true;
};
/**
* Converts JSON properties to values.
*/
json.jsPropertiesToValues = function(propertiesSoFar, o, i) {
if (isNull(i))
return propertiesSoFar;
var p = car(i);
var jsv = o[p];
var v = json.jsValToValue(jsv);
if (typeof p == 'string') {
var n = '' + p;
if (n.slice(0, 1) == '@')
return json.jsPropertiesToValues(cons(mklist(attribute, "'" + n.slice(1), v), propertiesSoFar), o, cdr(i));
if (isList(v) && !json.isJSArray(v))
return json.jsPropertiesToValues(cons(cons(element, cons("'" + n, v)), propertiesSoFar), o, cdr(i));
return json.jsPropertiesToValues(cons(mklist(element, "'" + n, v), propertiesSoFar), o, cdr(i));
}
return json.jsPropertiesToValues(cons(v, propertiesSoFar), o, cdr(i));
};
/**
* Converts a JSON val to a value.
*/
json.jsValToValue = function(jsv) {
if (jsv == null)
return null;
if (isList(jsv))
return json.jsPropertiesToValues(mklist(), jsv, reverse(range(0, jsv.length)));
if (typeof jsv == 'object')
return json.jsPropertiesToValues(mklist(), jsv, reverse(properties(jsv)));
if (typeof jsv == 'string')
return '' + jsv;
return jsv;
}
/**
* Return true if a list of strings contains a JSON document.
*/
json.isJSON = function(l) {
if (isNull(l))
return false;
var s = car(l).slice(0, 1);
return s == "[" || s == "{";
};
/**
* Convert a list of strings representing a JSON document to a list of values.
*/
json.readJSON = function(l) {
var s = writeStrings(l);
var obj;
eval('obj = { \"val\": ' + s + " }");
return json.jsValToValue(obj.val);
};
/**
* Convert a list of values to JSON array elements.
*/
json.valuesToJSElements = function(a, l, i) {
if (isNull(l))
return a;
var pv = json.valueToJSVal(car(l));
a[i] = pv
return json.valuesToJSElements(a, cdr(l), i + 1);
};
/**
* Convert a value to a JSON value.
*/
json.valueToJSVal = function(v) {
if (!isList(v))
return v;
if (json.isJSArray(v))
return json.valuesToJSElements(range(0, v.length), v, 0);
return json.valuesToJSProperties({}, v);
};
/**
* Convert a list of values to JSON properties.
*/
json.valuesToJSProperties = function(o, l) {
if (isNull(l))
return o;
var token = car(l);
if (isTaggedList(token, attribute)) {
var pv = json.valueToJSVal(attributeValue(token));
o['@' + attributeName(token).slice(1)] = pv;
} else if (isTaggedList(token, element)) {
if (elementHasValue(token)) {
var pv = json.valueToJSVal(elementValue(token));
o[elementName(token).slice(1)] = pv;
} else {
var child = {};
o[elementName(token).slice(1)] = child;
json.valuesToJSProperties(child, elementChildren(token));
}
}
return json.valuesToJSProperties(o, cdr(l));
};
/**
* Convert a list of values to a list of strings representing a JSON document.
*/
json.writeJSON = function(l) {
var jsv;
if (json.isJSArray(l))
jsv = json.valuesToJSElements(range(0, l.length), l, 0);
else
jsv = json.valuesToJSProperties({}, l);
var s = json.toJSON(jsv);
return mklist(s);
}
/**
* Convert a list + params to a JSON-RPC request.
*/
json.jsonRequest = function(id, func, params) {
var r = mklist(mklist("'id", id), mklist("'method", func), mklist("'params", params));
return json.writeJSON(valuesToElements(r));
};
/**
* Convert a value to a JSON-RPC result.
*/
json.jsonResult = function(id, val) {
return json.writeJSON(valuesToElements(mklist(mklist("'id", id), mklist("'result", val))));
};
/**
* Convert a JSON-RPC result to a value.
*/
json.jsonResultValue = function(s) {
var jsres = json.readJSON(s);
var res = elementsToValues(jsres);
var val = cadr(assoc("'result", res));
if (isList(val) && !json.isJSArray(val))
return mklist(val);
return val;
};
/**
* Escape a character.
*/
json.escapeJSONChar = function(c) {
if(c == "\"" || c == "\\") return "\\" + c;
if (c == "\b") return "\\b";
if (c == "\f") return "\\f";
if (c == "\n") return "\\n";
if (c == "\r") return "\\r";
if (c == "\t") return "\\t";
var hex = c.charCodeAt(0).toString(16);
if(hex.length == 1) return "\\u000" + hex;
if(hex.length == 2) return "\\u00" + hex;
if(hex.length == 3) return "\\u0" + hex;
return "\\u" + hex;
};
/**
* Encode a string into JSON format.
*/
json.escapeJSONString = function(s) {
// The following should suffice but Safari's regex is broken (doesn't support callback substitutions)
// return "\"" + s.replace(/([^\u0020-\u007f]|[\\\"])/g, json.escapeJSONChar) + "\"";
// Rather inefficient way to do it
var parts = s.split("");
for(var i = 0; i < parts.length; i++) {
var c = parts[i];
if(c == '"' || c == '\\' || c.charCodeAt(0) < 32 || c.charCodeAt(0) >= 128)
parts[i] = json.escapeJSONChar(parts[i]);
}
return "\"" + parts.join("") + "\"";
};
/**
* Marshall objects to JSON format.
*/
json.toJSON = function(o) {
if(o == null)
return "null";
if(o.constructor == String)
return json.escapeJSONString(o);
if(o.constructor == Number)
return o.toString();
if(o.constructor == Boolean)
return o.toString();
if(o.constructor == Date)
return '{javaClass: "java.util.Date", time: ' + o.valueOf() +'}';
if(o.constructor == Array) {
var v = [];
for(var i = 0; i < o.length; i++)
v.push(json.toJSON(o[i]));
return "[" + v.join(", ") + "]";
}
var v = [];
for(attr in o) {
if(o[attr] == null)
v.push("\"" + attr + "\": null");
else if(typeof o[attr] == "function")
; // Skip
else
v.push(json.escapeJSONString(attr) + ": " + json.toJSON(o[attr]));
}
return "{" + v.join(", ") + "}";
};
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