StatusType iDroid::GetAllAppsByDownloads(int versionCode, int** apps, int* numOfApps) {
	if(versionCode == 0 || apps == NULL || numOfApps == NULL)
		return INVALID_INPUT;
	Condition cond(1);
	StatusType res=SUCCESS;
	App** apps_arr=NULL;
	if(versionCode < 0) {
		res=downloads.inorderArray(apps_arr,numOfApps,cond);
	}
	else {
		Version temp = Version(versionCode);
		Version* ver = versions.find(temp);
	    res=ver->apps.inorderArray(apps_arr, numOfApps, cond);
	}
	(*apps) = (int*) malloc((*numOfApps) * sizeof(int));
	if (res!=SUCCESS) {
		return res;
	}
	for (int i=0; i<*numOfApps; i++) {
		(*apps)[i]=apps_arr[i].appID;
	}
	delete [] apps_arr;
	return SUCCESS;
}