js_util_module/container/plainarray/js_plainarray.ts

/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * 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.
 */
declare function requireNapi(s: string): any;

let flag = false;
let fastPlainArray = undefined;
let arkPritvate = globalThis["ArkPrivate"] || undefined;
if (arkPritvate !== undefined) {
  fastPlainArray = arkPritvate.Load(arkPritvate.PlainArray);
} else {
  flag = true;
}

if (flag || fastPlainArray === undefined) {
  const PlainAbility = requireNapi("struct");
  interface IterableIterator<T> {
    next: () => {
      value: T | undefined;
      done: boolean;
    };
  }
  class HandlerPlainArray<T> {
    set(target: PlainArray<T>, p: any, value: any): boolean {
      if (p in target) {
        target[p] = value;
        return true;
      }
      return false;
    }
    defineProperty(target: PlainArray<T>, p: any): boolean {
      throw new Error("Can't define Property on PlainArray Object");
    }
    deleteProperty(target: PlainArray<T>, p: any): boolean {
      throw new Error("Can't delete Property on PlainArray Object");
    }
    setPrototypeOf(target: PlainArray<T>, p: any): boolean {
      throw new Error("Can't set Prototype on PlainArray Object");
    }
  }
  class PlainArray<T> extends PlainAbility.PlainArrayClass<T> {
    constructor() {
      super();
      return new Proxy(this, new HandlerPlainArray());
    }
    get length() {
      return this.memberNumber;
    }
    add(key: number, value: T): void {
      if (typeof key !== "number") {
        throw new Error("PlainArray's only number is allowed");
      }
      this.addmember(key, value);
    }
    clear(): void {
      if (this.memberNumber != 0) {
        this.members.keys = [];
        this.members.values = [];
        this.memberNumber = 0;
      }
    }
    clone(): PlainArray<T> {
      let clone = new PlainArray<T>();
      clone.memberNumber = this.memberNumber;
      clone.members.keys = this.members.keys.slice();
      clone.members.values = this.members.values.slice();
      return clone;
    }
    has(key: number): boolean {
      return this.binarySearchAtPlain(key) > -1;
    }
    get(key: number): T {
      let index = this.binarySearchAtPlain(key);
      if (index < 0) throw new Error("Key error found");
      return this.members.values[index];
    }
    getIndexOfKey(key: number): number {
      let result = this.binarySearchAtPlain(key);
      return result < 0 ? -1 : result;
    }
    getIndexOfValue(value: T): number {
      return this.members.values.indexOf(value);
    }
    isEmpty(): boolean {
      return this.memberNumber === 0;
    }
    getKeyAt(index: number): number {
      return this.members.keys[index];
    }
    remove(key: number): T {
      let index = this.binarySearchAtPlain(key);
      if (index < 0) throw new Error(" element not in this plainarray");
      return this.deletemember(index);
    }
    removeAt(index: number): T {
      if (index >= this.memberNumber || index < 0) throw new Error("index not in this plainarray range");
      return this.deletemember(index);
    }
    removeRangeFrom(index: number, size: number): number {
      if (index >= this.memberNumber || index < 0) throw new Error("index not in this plainarray range");
      let safeSize = (this.memberNumber - (index + size) < 0) ? this.memberNumber - size : size;
      this.deletemember(index, safeSize);
      return safeSize;
    }
    setValueAt(index: number, value: T): void {
      if (index >= 0 && index < this.memberNumber) {
        this.members.values[index] = value;
      } else {
        throw new Error("index Out Of Bounds");
      }
    }
    toString(): string {
      let result = new Array<string>();
      for (let i = 0; i < this.memberNumber; i++) {
        result.push(this.members.keys[i] + ":" + this.members.values[i]);
      }
      return result.join(",");
    }
    getValueAt(index: number): T {
      return this.members.values[index];
    }
    forEach(callbackfn: (value: T, index?: number, PlainArray?: PlainArray<T>) => void,
      thisArg?: Object): void {
      for (let i = 0; i < this.memberNumber; i++) {
        callbackfn.call(thisArg, this.members.values[i], this.members.keys[i]);
      }
    }
    [Symbol.iterator](): IterableIterator<[number, T]> {
      let data = this;
      let count = 0;
      return {
        next: function () {
          var done = count >= data.memberNumber;
          var value = !done ? [data.members.keys[count], data.members.values[count]] as [number, T] : undefined;
          count++;
          return {
            done: done,
            value: value,
          };
        },
      };
    }
  }
  Object.freeze(PlainArray);
  fastPlainArray = PlainArray;
}

export default {
  PlainArray: fastPlainArray,
};