HarmonyOS 鸿蒙Next 属性声明两种数据类型 第二种数据类型使用不了

HarmonyOS 鸿蒙Next 属性声明两种数据类型 第二种数据类型使用不了

export class MyDataSource<T> implements IDataSource {
private listeners: DataChangeListener[] = [];
private originDataArray: T[] = [];

public totalCount(): number {
return this.originDataArray.length;
}

public getData(index: number) {
return this.originDataArray[index];
}

public arrAndArr(data:Array<T>): void {
this.originDataArray = data
this.notifyDataReload()
}

public pushData(data: T): void {
this.originDataArray.push(data);
this.notifyDataAdd(this.originDataArray.length - 1);
}

registerDataChangeListener(listener: DataChangeListener): void {
if (this.listeners.indexOf(listener) < 0) {
console.info('add listener');
this.listeners.push(listener);
}
}

unregisterDataChangeListener(listener: DataChangeListener): void {
const pos = this.listeners.indexOf(listener);
if (pos >= 0) {
console.info('remove listener');
this.listeners.splice(pos, 1);
}
}

notifyDataReload(): void {
this.listeners.forEach(listener => {
listener.onDataReloaded();
})
}

notifyDataAdd(index: number): void {
this.listeners.forEach(listener => {
listener.onDataAdd(index);
})
}

notifyDataChange(index: number): void {
this.listeners.forEach(listener => {
listener.onDataChange(index);
})
}

notifyDataDelete(index: number): void {
this.listeners.forEach(listener => {
listener.onDataDelete(index);
})
}

notifyDataMove(from: number, to: number): void {
this.listeners.forEach(listener => {
listener.onDataMove(from, to);
})
}