// 按照时间，sizeWindow和stepWindow将数据分成项集，再调用Itemset2File写入文件
public static String[] movingdivide(DataItems datainput, TaskElement task, boolean FP)
throws IOException {
int sizeWindow = (int) ((ParamsSM) task.getMiningParams()).getSizeWindow() * 1000; // seconds
int stepWindow = (int) ((ParamsSM) task.getMiningParams()).getStepWindow() * 1000; // seconds
int len = datainput.getLength();
List<Date> time = datainput.getTime();
List<String> data = datainput.getData();
List<String> DataSets = new ArrayList<String>();
Date win_start_time = time.get(0);
Date win_end_time = getDateAfter(win_start_time, sizeWindow);
Date win_start_next = getDateAfter(win_start_time, stepWindow);
int ind_next = -1;
StringBuilder sb = new StringBuilder();
int i = 0;
do {
DataItem item = datainput.getElementAt(i);
i++;
Date date = item.getTime();
String val = item.getData();
if (!date.before(win_start_time) && !date.after(win_end_time)) {
if (sb.length() != 0) sb.append(" ");
sb.append(val + " -1");
if (!date.before(win_start_next) && ind_next == -1) ind_next = i - 1;
} else {
sb.append(" -2");
DataSets.add(sb.toString());
sb = new StringBuilder();
if (ind_next == -1) {
if (!date.before(getDateAfter(win_end_time, stepWindow))) {
win_start_time = date;
if (sb.length() != 0) sb.append(" ");
sb.append(val + " -1");
} else {
win_start_time = win_start_next; // getDateAfter(win_start_time, stepWindow);
if (sb.length() != 0) sb.append(" ");
sb.append(val + " -1");
}
} else {
i = ind_next;
ind_next = -1;
win_start_time = win_start_next;
}
win_end_time = getDateAfter(win_start_time, sizeWindow);
win_start_next = getDateAfter(win_start_time, stepWindow);
}
} while (i < len);
sb.append(" -2");
DataSets.add(sb.toString());
return DataSets.toArray(new String[0]);
}
