532 lines
15 KiB
JavaScript
532 lines
15 KiB
JavaScript
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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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goog.provide('jspb.Map');
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goog.require('goog.asserts');
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goog.forwardDeclare('jspb.BinaryReader');
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goog.forwardDeclare('jspb.BinaryWriter');
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/**
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* Constructs a new Map. A Map is a container that is used to implement map
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* fields on message objects. It closely follows the ES6 Map API; however,
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* it is distinct because we do not want to depend on external polyfills or
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* on ES6 itself.
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*
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* This constructor should only be called from generated message code. It is not
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* intended for general use by library consumers.
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*
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* @template K, V
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*
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* @param {!Array<!Array<!Object>>} arr
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*
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* @param {?function(new:V)|function(new:V,?)=} opt_valueCtor
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* The constructor for type V, if type V is a message type.
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*
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* @constructor
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* @struct
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*/
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jspb.Map = function(arr, opt_valueCtor) {
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/** @const @private */
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this.arr_ = arr;
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/** @const @private */
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this.valueCtor_ = opt_valueCtor;
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/** @type {!Object<string, !jspb.Map.Entry_<K,V>>} @private */
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this.map_ = {};
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/**
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* Is `this.arr_ updated with respect to `this.map_`?
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* @type {boolean}
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*/
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this.arrClean = true;
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if (this.arr_.length > 0) {
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this.loadFromArray_();
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}
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};
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/**
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* Load initial content from underlying array.
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* @private
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*/
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jspb.Map.prototype.loadFromArray_ = function() {
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for (var i = 0; i < this.arr_.length; i++) {
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var record = this.arr_[i];
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var key = record[0];
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var value = record[1];
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this.map_[key.toString()] = new jspb.Map.Entry_(key, value);
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}
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this.arrClean = true;
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};
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/**
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* Synchronize content to underlying array, if needed, and return it.
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* @return {!Array<!Array<!Object>>}
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*/
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jspb.Map.prototype.toArray = function() {
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if (this.arrClean) {
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if (this.valueCtor_) {
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// We need to recursively sync maps in submessages to their arrays.
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var m = this.map_;
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for (var p in m) {
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if (Object.prototype.hasOwnProperty.call(m, p)) {
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var valueWrapper = /** @type {?jspb.Message} */ (m[p].valueWrapper);
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if (valueWrapper) {
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valueWrapper.toArray();
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}
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}
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}
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}
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} else {
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// Delete all elements.
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this.arr_.length = 0;
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var strKeys = this.stringKeys_();
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// Output keys in deterministic (sorted) order.
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strKeys.sort();
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for (var i = 0; i < strKeys.length; i++) {
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var entry = this.map_[strKeys[i]];
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var valueWrapper = /** @type {!Object} */ (entry.valueWrapper);
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if (valueWrapper) {
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valueWrapper.toArray();
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}
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this.arr_.push([entry.key, entry.value]);
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}
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this.arrClean = true;
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}
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return this.arr_;
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};
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/**
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* Returns the map formatted as an array of key-value pairs, suitable for the
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* toObject() form of a message.
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*
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* @param {boolean=} includeInstance Whether to include the JSPB instance for
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* transitional soy proto support: http://goto/soy-param-migration
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* @param {!function((boolean|undefined),V):!Object=} valueToObject
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* The static toObject() method, if V is a message type.
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* @return {!Array<!Array<!Object>>}
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*/
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jspb.Map.prototype.toObject = function(includeInstance, valueToObject) {
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var rawArray = this.toArray();
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var entries = [];
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for (var i = 0; i < rawArray.length; i++) {
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var entry = this.map_[rawArray[i][0].toString()];
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this.wrapEntry_(entry);
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var valueWrapper = /** @type {V|undefined} */ (entry.valueWrapper);
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if (valueWrapper) {
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goog.asserts.assert(valueToObject);
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entries.push([entry.key, valueToObject(includeInstance, valueWrapper)]);
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} else {
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entries.push([entry.key, entry.value]);
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}
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}
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return entries;
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};
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/**
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* Returns a Map from the given array of key-value pairs when the values are of
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* message type. The values in the array must match the format returned by their
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* message type's toObject() method.
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*
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* @template K, V
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* @param {!Array<!Array<!Object>>} entries
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* @param {!function(new:V)|function(new:V,?)} valueCtor
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* The constructor for type V.
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* @param {!function(!Object):V} valueFromObject
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* The fromObject function for type V.
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* @return {!jspb.Map<K, V>}
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*/
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jspb.Map.fromObject = function(entries, valueCtor, valueFromObject) {
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var result = new jspb.Map([], valueCtor);
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for (var i = 0; i < entries.length; i++) {
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var key = entries[i][0];
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var value = valueFromObject(entries[i][1]);
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result.set(key, value);
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}
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return result;
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};
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/**
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* Helper: an IteratorIterable over an array.
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* @template T
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* @param {!Array<T>} arr the array
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* @implements {IteratorIterable<T>}
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* @constructor @struct
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* @private
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*/
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jspb.Map.ArrayIteratorIterable_ = function(arr) {
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/** @type {number} @private */
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this.idx_ = 0;
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/** @const @private */
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this.arr_ = arr;
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};
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/** @override @final */
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jspb.Map.ArrayIteratorIterable_.prototype.next = function() {
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if (this.idx_ < this.arr_.length) {
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return {done: false, value: this.arr_[this.idx_++]};
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} else {
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return {done: true, value: undefined};
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}
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};
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if (typeof(Symbol) != 'undefined') {
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/** @override */
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jspb.Map.ArrayIteratorIterable_.prototype[Symbol.iterator] = function() {
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return this;
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};
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}
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/**
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* Returns the map's length (number of key/value pairs).
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* @return {number}
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*/
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jspb.Map.prototype.getLength = function() {
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return this.stringKeys_().length;
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};
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/**
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* Clears the map.
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*/
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jspb.Map.prototype.clear = function() {
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this.map_ = {};
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this.arrClean = false;
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};
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/**
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* Deletes a particular key from the map.
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* N.B.: differs in name from ES6 Map's `delete` because IE8 does not support
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* reserved words as property names.
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* @this {jspb.Map}
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* @param {K} key
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* @return {boolean} Whether any entry with this key was deleted.
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*/
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jspb.Map.prototype.del = function(key) {
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var keyValue = key.toString();
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var hadKey = this.map_.hasOwnProperty(keyValue);
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delete this.map_[keyValue];
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this.arrClean = false;
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return hadKey;
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};
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/**
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* Returns an array of [key, value] pairs in the map.
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*
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* This is redundant compared to the plain entries() method, but we provide this
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* to help out Angular 1.x users. Still evaluating whether this is the best
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* option.
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*
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* @return {!Array<!Array<K|V>>}
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*/
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jspb.Map.prototype.getEntryList = function() {
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var entries = [];
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var strKeys = this.stringKeys_();
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strKeys.sort();
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for (var i = 0; i < strKeys.length; i++) {
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var entry = this.map_[strKeys[i]];
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entries.push([entry.key, entry.value]);
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}
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return entries;
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};
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/**
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* Returns an iterator-iterable over [key, value] pairs in the map.
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* Closure compiler sadly doesn't support tuples, ie. Iterator<[K,V]>.
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* @return {!IteratorIterable<!Array<K|V>>} The iterator-iterable.
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*/
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jspb.Map.prototype.entries = function() {
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var entries = [];
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var strKeys = this.stringKeys_();
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strKeys.sort();
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for (var i = 0; i < strKeys.length; i++) {
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var entry = this.map_[strKeys[i]];
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entries.push([entry.key, this.wrapEntry_(entry)]);
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}
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return new jspb.Map.ArrayIteratorIterable_(entries);
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};
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/**
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* Returns an iterator-iterable over keys in the map.
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* @return {!IteratorIterable<K>} The iterator-iterable.
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*/
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jspb.Map.prototype.keys = function() {
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var keys = [];
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var strKeys = this.stringKeys_();
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strKeys.sort();
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for (var i = 0; i < strKeys.length; i++) {
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var entry = this.map_[strKeys[i]];
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keys.push(entry.key);
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}
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return new jspb.Map.ArrayIteratorIterable_(keys);
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};
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/**
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* Returns an iterator-iterable over values in the map.
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* @return {!IteratorIterable<V>} The iterator-iterable.
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*/
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jspb.Map.prototype.values = function() {
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var values = [];
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var strKeys = this.stringKeys_();
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strKeys.sort();
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for (var i = 0; i < strKeys.length; i++) {
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var entry = this.map_[strKeys[i]];
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values.push(this.wrapEntry_(entry));
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}
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return new jspb.Map.ArrayIteratorIterable_(values);
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};
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/**
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* Iterates over entries in the map, calling a function on each.
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* @template T
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* @param {function(this:T, V, K, ?jspb.Map<K, V>)} cb
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* @param {T=} opt_thisArg
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*/
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jspb.Map.prototype.forEach = function(cb, opt_thisArg) {
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var strKeys = this.stringKeys_();
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strKeys.sort();
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for (var i = 0; i < strKeys.length; i++) {
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var entry = this.map_[strKeys[i]];
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cb.call(opt_thisArg, this.wrapEntry_(entry), entry.key, this);
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}
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};
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/**
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* Sets a key in the map to the given value.
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* @param {K} key The key
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* @param {V} value The value
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* @return {!jspb.Map<K,V>}
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*/
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jspb.Map.prototype.set = function(key, value) {
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var entry = new jspb.Map.Entry_(key);
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if (this.valueCtor_) {
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entry.valueWrapper = value;
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// .toArray() on a message returns a reference to the underlying array
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// rather than a copy.
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entry.value = value.toArray();
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} else {
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entry.value = value;
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}
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this.map_[key.toString()] = entry;
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this.arrClean = false;
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return this;
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};
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/**
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* Helper: lazily construct a wrapper around an entry, if needed, and return the
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* user-visible type.
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* @param {!jspb.Map.Entry_<K,V>} entry
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* @return {V}
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* @private
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*/
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jspb.Map.prototype.wrapEntry_ = function(entry) {
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if (this.valueCtor_) {
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if (!entry.valueWrapper) {
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entry.valueWrapper = new this.valueCtor_(entry.value);
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}
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return /** @type {V} */ (entry.valueWrapper);
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} else {
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return entry.value;
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}
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};
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/**
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* Gets the value corresponding to a key in the map.
|
||
|
|
* @param {K} key
|
||
|
|
* @return {V|undefined} The value, or `undefined` if key not present
|
||
|
|
*/
|
||
|
|
jspb.Map.prototype.get = function(key) {
|
||
|
|
var keyValue = key.toString();
|
||
|
|
var entry = this.map_[keyValue];
|
||
|
|
if (entry) {
|
||
|
|
return this.wrapEntry_(entry);
|
||
|
|
} else {
|
||
|
|
return undefined;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Determines whether the given key is present in the map.
|
||
|
|
* @param {K} key
|
||
|
|
* @return {boolean} `true` if the key is present
|
||
|
|
*/
|
||
|
|
jspb.Map.prototype.has = function(key) {
|
||
|
|
var keyValue = key.toString();
|
||
|
|
return (keyValue in this.map_);
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Write this Map field in wire format to a BinaryWriter, using the given field
|
||
|
|
* number.
|
||
|
|
* @param {number} fieldNumber
|
||
|
|
* @param {!jspb.BinaryWriter} writer
|
||
|
|
* @param {!function(this:jspb.BinaryWriter,number,K)} keyWriterFn
|
||
|
|
* The method on BinaryWriter that writes type K to the stream.
|
||
|
|
* @param {!function(this:jspb.BinaryWriter,number,V,?=)|
|
||
|
|
* function(this:jspb.BinaryWriter,number,V,?)} valueWriterFn
|
||
|
|
* The method on BinaryWriter that writes type V to the stream. May be
|
||
|
|
* writeMessage, in which case the second callback arg form is used.
|
||
|
|
* @param {function(V,!jspb.BinaryWriter)=} opt_valueWriterCallback
|
||
|
|
* The BinaryWriter serialization callback for type V, if V is a message
|
||
|
|
* type.
|
||
|
|
*/
|
||
|
|
jspb.Map.prototype.serializeBinary = function(
|
||
|
|
fieldNumber, writer, keyWriterFn, valueWriterFn, opt_valueWriterCallback) {
|
||
|
|
var strKeys = this.stringKeys_();
|
||
|
|
strKeys.sort();
|
||
|
|
for (var i = 0; i < strKeys.length; i++) {
|
||
|
|
var entry = this.map_[strKeys[i]];
|
||
|
|
writer.beginSubMessage(fieldNumber);
|
||
|
|
keyWriterFn.call(writer, 1, entry.key);
|
||
|
|
if (this.valueCtor_) {
|
||
|
|
valueWriterFn.call(writer, 2, this.wrapEntry_(entry),
|
||
|
|
opt_valueWriterCallback);
|
||
|
|
} else {
|
||
|
|
valueWriterFn.call(writer, 2, entry.value);
|
||
|
|
}
|
||
|
|
writer.endSubMessage();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Read one key/value message from the given BinaryReader. Compatible as the
|
||
|
|
* `reader` callback parameter to jspb.BinaryReader.readMessage, to be called
|
||
|
|
* when a key/value pair submessage is encountered.
|
||
|
|
* @template K, V
|
||
|
|
* @param {!jspb.Map} map
|
||
|
|
* @param {!jspb.BinaryReader} reader
|
||
|
|
* @param {!function(this:jspb.BinaryReader):K} keyReaderFn
|
||
|
|
* The method on BinaryReader that reads type K from the stream.
|
||
|
|
*
|
||
|
|
* @param {!function(this:jspb.BinaryReader):V|
|
||
|
|
* function(this:jspb.BinaryReader,V,
|
||
|
|
* function(V,!jspb.BinaryReader))} valueReaderFn
|
||
|
|
* The method on BinaryReader that reads type V from the stream. May be
|
||
|
|
* readMessage, in which case the second callback arg form is used.
|
||
|
|
*
|
||
|
|
* @param {?function(V,!jspb.BinaryReader)=} opt_valueReaderCallback
|
||
|
|
* The BinaryReader parsing callback for type V, if V is a message type.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
jspb.Map.deserializeBinary = function(map, reader, keyReaderFn, valueReaderFn,
|
||
|
|
opt_valueReaderCallback) {
|
||
|
|
var key = undefined;
|
||
|
|
var value = undefined;
|
||
|
|
|
||
|
|
while (reader.nextField()) {
|
||
|
|
if (reader.isEndGroup()) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
var field = reader.getFieldNumber();
|
||
|
|
if (field == 1) {
|
||
|
|
// Key.
|
||
|
|
key = keyReaderFn.call(reader);
|
||
|
|
} else if (field == 2) {
|
||
|
|
// Value.
|
||
|
|
if (map.valueCtor_) {
|
||
|
|
value = new map.valueCtor_();
|
||
|
|
valueReaderFn.call(reader, value, opt_valueReaderCallback);
|
||
|
|
} else {
|
||
|
|
value = valueReaderFn.call(reader);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
goog.asserts.assert(key != undefined);
|
||
|
|
goog.asserts.assert(value != undefined);
|
||
|
|
map.set(key, value);
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Helper: compute the list of all stringified keys in the underlying Object
|
||
|
|
* map.
|
||
|
|
* @return {!Array<string>}
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
jspb.Map.prototype.stringKeys_ = function() {
|
||
|
|
var m = this.map_;
|
||
|
|
var ret = [];
|
||
|
|
for (var p in m) {
|
||
|
|
if (Object.prototype.hasOwnProperty.call(m, p)) {
|
||
|
|
ret.push(p);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return ret;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param {K} key The entry's key.
|
||
|
|
* @param {V=} opt_value The entry's value wrapper.
|
||
|
|
* @constructor
|
||
|
|
* @struct
|
||
|
|
* @template K, V
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
jspb.Map.Entry_ = function(key, opt_value) {
|
||
|
|
/** @const {K} */
|
||
|
|
this.key = key;
|
||
|
|
|
||
|
|
// The JSPB-serializable value. For primitive types this will be of type V.
|
||
|
|
// For message types it will be an array.
|
||
|
|
/** @type {V} */
|
||
|
|
this.value = opt_value;
|
||
|
|
|
||
|
|
// Only used for submessage values.
|
||
|
|
/** @type {V} */
|
||
|
|
this.valueWrapper = undefined;
|
||
|
|
};
|