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1// Protocol Buffers - Google's data interchange format
2// Copyright 2008 Google Inc.  All rights reserved.
3// https://developers.google.com/protocol-buffers/
4//
5// Redistribution and use in source and binary forms, with or without
6// modification, are permitted provided that the following conditions are
7// met:
8//
9//     * Redistributions of source code must retain the above copyright
10// notice, this list of conditions and the following disclaimer.
11//     * Redistributions in binary form must reproduce the above
12// copyright notice, this list of conditions and the following disclaimer
13// in the documentation and/or other materials provided with the
14// distribution.
15//     * Neither the name of Google Inc. nor the names of its
16// contributors may be used to endorse or promote products derived from
17// this software without specific prior written permission.
18//
19// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30
31/**
32 * @fileoverview Utilities to debug JSPB based proto objects.
33 */
34
35goog.provide('jspb.debug');
36
37goog.require('goog.array');
38goog.require('goog.asserts');
39goog.require('goog.object');
40goog.require('jspb.Message');
41
42
43/**
44 * Turns a proto into a human readable object that can i.e. be written to the
45 * console: {@code console.log(jspb.debug.dump(myProto))}.
46 * This function makes a best effort and may not work in all cases. It will not
47 * work in obfuscated and or optimized code.
48 * Use this in environments where {@see jspb.Message.prototype.toObject} is
49 * not available for code size reasons.
50 * @param {jspb.Message} message A jspb.Message.
51 * @return {Object}
52 */
53jspb.debug.dump = function(message) {
54  if (!goog.DEBUG) {
55    return null;
56  }
57  goog.asserts.assert(message instanceof jspb.Message,
58      'jspb.Message instance expected');
59  /** @type {Object} */
60  var object = message;
61  goog.asserts.assert(object['getExtension'],
62      'Only unobfuscated and unoptimized compilation modes supported.');
63  return /** @type {Object} */ (jspb.debug.dump_(message));
64};
65
66
67/**
68 * Recursively introspects a message and the values its getters return to
69 * make a best effort in creating a human readable representation of the
70 * message.
71 * @param {?} thing A jspb.Message, Array or primitive type to dump.
72 * @return {*}
73 * @private
74 */
75jspb.debug.dump_ = function(thing) {
76  var type = goog.typeOf(thing);
77  if (type == 'number' || type == 'string' || type == 'boolean' ||
78      type == 'null' || type == 'undefined') {
79    return thing;
80  }
81  if (type == 'array') {
82    goog.asserts.assertArray(thing);
83    return goog.array.map(thing, jspb.debug.dump_);
84  }
85  var message = thing;  // Copy because we don't want type inference on thing.
86  goog.asserts.assert(message instanceof jspb.Message,
87      'Only messages expected: ' + thing);
88  var ctor = message.constructor;
89  var messageName = ctor.name || ctor.displayName;
90  var object = {
91    '$name': messageName
92  };
93  for (var name in ctor.prototype) {
94    var match = /^get([A-Z]\w*)/.exec(name);
95    if (match && name != 'getExtension' &&
96        name != 'getJsPbMessageId') {
97      var val = thing[name]();
98      if (val != null) {
99        object[jspb.debug.formatFieldName_(match[1])] = jspb.debug.dump_(val);
100      }
101    }
102  }
103  if (COMPILED && thing['extensionObject_']) {
104    object['$extensions'] = 'Recursive dumping of extensions not supported ' +
105        'in compiled code. Switch to uncompiled or dump extension object ' +
106        'directly';
107    return object;
108  }
109  var extensionsObject;
110  for (var id in ctor['extensions']) {
111    if (/^\d+$/.test(id)) {
112      var ext = ctor['extensions'][id];
113      var extVal = thing.getExtension(ext);
114      var fieldName = goog.object.getKeys(ext.fieldName)[0];
115      if (extVal != null) {
116        if (!extensionsObject) {
117          extensionsObject = object['$extensions'] = {};
118        }
119        extensionsObject[jspb.debug.formatFieldName_(fieldName)] =
120            jspb.debug.dump_(extVal);
121      }
122    }
123  }
124  return object;
125};
126
127
128/**
129 * Formats a field name for output as camelCase.
130 *
131 * @param {string} name Name of the field.
132 * @return {string}
133 * @private
134 */
135jspb.debug.formatFieldName_ = function(name) {
136  // Name may be in TitleCase.
137  return name.replace(/^[A-Z]/, function(c) {
138    return c.toLowerCase();
139  });
140};
141