143 lines
3.8 KiB
JavaScript
143 lines
3.8 KiB
JavaScript
"use strict";
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var Class = require("../utils/class");
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var RBTree = require("bintrees").RBTree;
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var AbstractPair = require("./abstractpair");
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var AbstractMap = Class.inherit({
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"className": "AbstractMap",
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"constructor": function(owning) {
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Class.fn.constructor.call(this);
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this._owning = owning !== false;
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this._data = new RBTree(function (a, b) {
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if (a[">"](b)) {
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return 1;
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}
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if (a["<"](b)) {
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return -1
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}
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if (a["=="](b)) {
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return 0;
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}
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});
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},
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"destructor": function() {
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this.clear();
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Class.fn.destructor.call(this);
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},
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"begin": function() {
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var itr = this._data.iterator();
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if (itr.next() !== null) {
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return new Iterator(itr);
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}
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return this.end();
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},
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"clear": function() {
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if (this._owning) {
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this._data.each(function(data) {
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data.destructor();
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});
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}
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this._data.clear();
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},
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"each": function(funct) {
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this._data.each(funct);
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},
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"end": function() {
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return new Iterator(this._data.iterator());
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},
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"erase": function(itr) {
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var pair = itr["*"]();
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if (!this._data.remove(pair)) {
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throw new Error("An attempt to remove non-existing map element");
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}
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if (this._owning) {
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pair.destructor();
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}
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},
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"find": function(key) {
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var pair = new this.constructor.dataType(key);
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var iter = this._data.findIter(pair);
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if (iter === null) {
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return this.end();
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}
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return new Iterator(iter);
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},
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"insert": function(key, value) {
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var pair = new this.constructor.dataType(key, value);
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if (!this._data.insert(pair)) {
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throw new Error("An attempt to insert already existing element into a map");
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}
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},
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"r_each": function(funct) {
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this._data.reach(funct);
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},
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"size": function() {
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return this._data.size;
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},
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"lowerBound": function(key) {
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var pair = new this.constructor.dataType(key);
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return new Iterator(this._data.lowerBound(pair));
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},
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"upperBound": function(key) {
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var pair = new this.constructor.dataType(key);
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return new Iterator(this._data.upperBound(pair));
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}
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});
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var Iterator = Class.inherit({
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"className": "MapIterator",
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"constructor": function(rbtree_iterator) {
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Class.fn.constructor.call(this);
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this._itr = rbtree_iterator;
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},
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"++": function() {
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if ((this._itr._cursor === null)) {
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throw new Error("An attempt to increment an iterator pointing to the end of the map");
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}
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this._itr.next();
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},
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"--": function() {
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this._itr.prev();
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if ((this._itr._cursor === null)) {
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throw new Error("An attempt to decrement an iterator pointing to the beginning of the map");
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}
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},
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"==": function(other) {
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return this._itr.data() === other._itr.data();
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},
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"*": function() {
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if ((this._itr._cursor === null)) {
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throw new Error("An attempt to dereference an iterator pointing to the end of the map");
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}
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return this._itr.data();
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}
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});
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AbstractMap.dataType = undefined;
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AbstractMap.iterator = Iterator;
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AbstractMap.template = function(first, second) {
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var dt = AbstractPair.template(first, second);
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var Map = AbstractMap.inherit({
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"className": "Map",
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"constructor": function(owning) {
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AbstractMap.fn.constructor.call(this, owning);
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}
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});
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Map.dataType = dt;
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return Map;
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};
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module.exports = AbstractMap;
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