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// Copyright 2011 The Closure Library Authors. 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.
/**
* @fileoverview Static methods for serializing and deserializing log
* messages. These methods are deliberately kept separate from logrecord.js
* and logger.js because they add dependencies on goog.json and goog.object.
*
*/
goog.provide('goog.debug.logRecordSerializer');
goog.require('goog.debug.LogRecord');
goog.require('goog.debug.Logger');
goog.require('goog.json');
goog.require('goog.object');
/**
* Enumeration of object keys used when serializing a log message.
* @enum {string}
* @private
*/
goog.debug.logRecordSerializer.Param_ = {
TIME: 't',
LEVEL_NAME: 'ln',
LEVEL_VALUE: 'lv',
MSG: 'm',
LOGGER_NAME: 'n',
SEQUENCE_NUMBER: 's',
EXCEPTION: 'e'
};
/**
* Serializes a LogRecord to a JSON string. Note that any associated
* exception is likely to be lost.
* @param {goog.debug.LogRecord} record The record to serialize.
* @return {string} Serialized JSON string of the log message.
*/
goog.debug.logRecordSerializer.serialize = function(record) {
var param = goog.debug.logRecordSerializer.Param_;
return goog.json.serialize(
goog.object.create(
param.TIME, record.getMillis(), param.LEVEL_NAME,
record.getLevel().name, param.LEVEL_VALUE, record.getLevel().value,
param.MSG, record.getMessage(), param.LOGGER_NAME,
record.getLoggerName(), param.SEQUENCE_NUMBER,
record.getSequenceNumber(), param.EXCEPTION,
record.getException() && record.getException().message));
};
/**
* Deserializes a JSON-serialized LogRecord.
* @param {string} s The JSON serialized record.
* @return {!goog.debug.LogRecord} The deserialized record.
*/
goog.debug.logRecordSerializer.parse = function(s) {
return goog.debug.logRecordSerializer.reconstitute_(
/** @type {!Object} */ (JSON.parse(s)));
};
/**
* Reconstitutes LogRecord from the JSON object.
* @param {Object} o The JSON object.
* @return {!goog.debug.LogRecord} The reconstituted record.
* @private
*/
goog.debug.logRecordSerializer.reconstitute_ = function(o) {
var param = goog.debug.logRecordSerializer.Param_;
var level = goog.debug.logRecordSerializer.getLevel_(
o[param.LEVEL_NAME], o[param.LEVEL_VALUE]);
var ret = new goog.debug.LogRecord(
level, o[param.MSG], o[param.LOGGER_NAME], o[param.TIME],
o[param.SEQUENCE_NUMBER]);
var exceptionMessage = o[param.EXCEPTION];
if (goog.isDefAndNotNull(exceptionMessage)) {
ret.setException(new Error(exceptionMessage));
}
return ret;
};
/**
* @param {string} name The name of the log level to return.
* @param {number} value The numeric value of the log level to return.
* @return {!goog.debug.Logger.Level} Returns a goog.debug.Logger.Level with
* the specified name and value. If the name and value match a predefined
* log level, that instance will be returned, otherwise a new one will be
* created.
* @private
*/
goog.debug.logRecordSerializer.getLevel_ = function(name, value) {
var level = goog.debug.Logger.Level.getPredefinedLevel(name);
return level && level.value == value ? level : new goog.debug.Logger.Level(
name, value);
};
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