"use strict";
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
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var __values = (this && this.__values) || function(o) {
var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
if (m) return m.call(o);
if (o && typeof o.length === "number") return {
next: function () {
if (o && i >= o.length) o = void 0;
return { value: o && o[i++], done: !o };
}
};
throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
};
Object.defineProperty(exports, "__esModule", { value: true });
var LinkList_1 = require("../LinkList/LinkList");
var Map_1 = require("../Map/Map");
HashMap.initSize = (1 << 4);
HashMap.maxSize = (1 << 30);
HashMap.sigma = 0.75; // default load factor
HashMap.treeifyThreshold = 8;
HashMap.untreeifyThreshold = 6;
HashMap.minTreeifySize = 64;
/**
* Note that resize is a time-consuming operation, please try to determine the number of buckets before use.
* @param container Initialize the container
* @param initBucketNum Initialize the bucket num, must be 2 to the power of n
* @param hashFunc Function to map elements to numbers
* @constructor
*/
function HashMap(container, initBucketNum, hashFunc) {
var _this = this;
if (container === void 0) { container = []; }
if (initBucketNum === void 0) { initBucketNum = HashMap.initSize; }
hashFunc = hashFunc || (function (x) {
var e_1, _a;
var hashCode = 0;
var str = '';
if (typeof x === "number") {
hashCode = Math.floor(x);
hashCode = ((hashCode << 5) - hashCode);
hashCode = hashCode & hashCode;
}
else {
if (typeof x !== "string") {
str = JSON.stringify(x);
}
else
str = x;
try {
for (var str_1 = __values(str), str_1_1 = str_1.next(); !str_1_1.done; str_1_1 = str_1.next()) {
var ch = str_1_1.value;
var character = ch.charCodeAt(0);
hashCode = ((hashCode << 5) - hashCode) + character;
hashCode = hashCode & hashCode;
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (str_1_1 && !str_1_1.done && (_a = str_1.return)) _a.call(str_1);
}
finally { if (e_1) throw e_1.error; }
}
}
hashCode ^= (hashCode >>> 16);
return hashCode;
});
if ((initBucketNum & (initBucketNum - 1)) !== 0) {
throw new Error("initBucketNum must be 2 to the power of n");
}
var len = 0;
var hashTable = [];
var bucketNum = Math.max(HashMap.initSize, Math.min(HashMap.maxSize, initBucketNum));
this.size = function () {
return len;
};
this.empty = function () {
return len === 0;
};
this.clear = function () {
len = 0;
bucketNum = initBucketNum;
hashTable = [];
};
this.forEach = function (callback) {
var index = 0;
hashTable.forEach(function (container) {
container.forEach(function (element) {
callback(element, index++);
});
});
};
var reAllocate = function (originalBucketNum) {
if (originalBucketNum >= HashMap.maxSize)
return;
bucketNum = originalBucketNum * 2;
var newHashTable = [];
hashTable.forEach(function (container, index) {
if (container.empty())
return;
if (container instanceof LinkList_1.default && container.size() === 1) {
var _a = container.front(), key = _a.key, value = _a.value;
newHashTable[hashFunc(key) & (bucketNum - 1)] = new LinkList_1.default([{
key: key,
value: value
}]);
}
else if (container instanceof Map_1.default) {
var lowList_1 = new LinkList_1.default();
var highList_1 = new LinkList_1.default();
container.forEach(function (pair) {
var hashCode = hashFunc(pair.key);
if ((hashCode & originalBucketNum) === 0) {
lowList_1.pushBack(pair);
}
else
highList_1.pushBack(pair);
});
if (lowList_1.size() > HashMap.untreeifyThreshold)
newHashTable[index] = new Map_1.default(lowList_1);
else if (lowList_1.size())
newHashTable[index] = lowList_1;
if (highList_1.size() > HashMap.untreeifyThreshold)
newHashTable[index + originalBucketNum] = new Map_1.default(highList_1);
else if (highList_1.size())
newHashTable[index + originalBucketNum] = highList_1;
}
else {
var lowList_2 = new LinkList_1.default();
var highList_2 = new LinkList_1.default();
container.forEach(function (pair) {
var hashCode = hashFunc(pair.key);
if ((hashCode & originalBucketNum) === 0) {
lowList_2.pushBack(pair);
}
else
highList_2.pushBack(pair);
});
if (lowList_2.size())
newHashTable[index] = lowList_2;
if (highList_2.size())
newHashTable[index + originalBucketNum] = highList_2;
}
hashTable[index].clear();
});
hashTable = newHashTable;
};
this.setElement = function (key, value) {
var e_2, _a;
if (key === null || key === undefined) {
throw new Error("to avoid some unnecessary errors, we don't suggest you insert null or undefined here");
}
if (value === null || value === undefined) {
this.eraseElementByKey(key);
return;
}
var index = hashFunc(key) & (bucketNum - 1);
if (!hashTable[index]) {
++len;
hashTable[index] = new LinkList_1.default([{ key: key, value: value }]);
}
else {
var preSize = hashTable[index].size();
if (hashTable[index] instanceof LinkList_1.default) {
try {
for (var _b = __values(hashTable[index]), _c = _b.next(); !_c.done; _c = _b.next()) {
var pair = _c.value;
if (pair.key === key) {
pair.value = value;
return;
}
}
}
catch (e_2_1) { e_2 = { error: e_2_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_2) throw e_2.error; }
}
hashTable[index].pushBack({
key: key,
value: value,
});
if (hashTable[index].size() >= HashMap.treeifyThreshold) {
hashTable[index] = new Map_1.default(hashTable[index]);
}
}
else
hashTable[index].setElement(key, value);
var curSize = hashTable[index].size();
len += curSize - preSize;
}
if (len > bucketNum * HashMap.sigma) {
reAllocate.call(this, bucketNum);
}
};
this.getElementByKey = function (key) {
var e_3, _a;
var index = hashFunc(key) & (bucketNum - 1);
if (!hashTable[index])
return undefined;
if (hashTable[index] instanceof Map_1.default)
return hashTable[index].getElementByKey(key);
else {
try {
for (var _b = __values(hashTable[index]), _c = _b.next(); !_c.done; _c = _b.next()) {
var pair = _c.value;
if (pair.key === key)
return pair.value;
}
}
catch (e_3_1) { e_3 = { error: e_3_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_3) throw e_3.error; }
}
return undefined;
}
};
this.eraseElementByKey = function (key) {
var e_4, _a;
var index = hashFunc(key) & (bucketNum - 1);
if (!hashTable[index])
return;
var preSize = hashTable[index].size();
if (hashTable[index] instanceof Map_1.default) {
hashTable[index].eraseElementByKey(key);
if (hashTable[index].size() <= HashMap.untreeifyThreshold) {
hashTable[index] = new LinkList_1.default(hashTable[index]);
}
}
else {
var pos = -1;
try {
for (var _b = __values(hashTable[index]), _c = _b.next(); !_c.done; _c = _b.next()) {
var pair = _c.value;
++pos;
if (pair.key === key) {
hashTable[index].eraseElementByPos(pos);
break;
}
}
}
catch (e_4_1) { e_4 = { error: e_4_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_4) throw e_4.error; }
}
}
var curSize = hashTable[index].size();
len += curSize - preSize;
};
this.find = function (key) {
var e_5, _a;
var index = hashFunc(key) & (bucketNum - 1);
if (!hashTable[index])
return false;
if (hashTable[index] instanceof Map_1.default)
return hashTable[index].find(key);
try {
for (var _b = __values(hashTable[index]), _c = _b.next(); !_c.done; _c = _b.next()) {
var pair = _c.value;
if (pair.key === key)
return true;
}
}
catch (e_5_1) { e_5 = { error: e_5_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_5) throw e_5.error; }
}
return false;
};
this[Symbol.iterator] = function () {
return (function () {
var index, _a, _b, pair, e_6_1;
var e_6, _c;
return __generator(this, function (_d) {
switch (_d.label) {
case 0:
index = 0;
_d.label = 1;
case 1:
if (!(index < bucketNum)) return [3 /*break*/, 10];
while (index < bucketNum && !hashTable[index])
++index;
if (index >= bucketNum)
return [3 /*break*/, 10];
_d.label = 2;
case 2:
_d.trys.push([2, 7, 8, 9]);
_a = (e_6 = void 0, __values(hashTable[index])), _b = _a.next();
_d.label = 3;
case 3:
if (!!_b.done) return [3 /*break*/, 6];
pair = _b.value;
return [4 /*yield*/, pair];
case 4:
_d.sent();
_d.label = 5;
case 5:
_b = _a.next();
return [3 /*break*/, 3];
case 6: return [3 /*break*/, 9];
case 7:
e_6_1 = _d.sent();
e_6 = { error: e_6_1 };
return [3 /*break*/, 9];
case 8:
try {
if (_b && !_b.done && (_c = _a.return)) _c.call(_a);
}
finally { if (e_6) throw e_6.error; }
return [7 /*endfinally*/];
case 9:
++index;
return [3 /*break*/, 1];
case 10: return [2 /*return*/];
}
});
})();
};
container.forEach(function (_a) {
var key = _a.key, value = _a.value;
return _this.setElement(key, value);
});
Object.freeze(this);
}
Object.freeze(HashMap);
exports.default = HashMap;