public int[] getSensorTimeInterval(SensorMeta sensorMeta) {
throwNull(sensorMeta);
BTreeMap<Integer, ChunkMeta> chunkMetaMap = getSensorChunkMetaMap(sensorMeta);
if (chunkMetaMap.isEmpty()) {
return null;
}
return new int[] {chunkMetaMap.firstKey(), chunkMetaMap.lastEntry().getValue().lastTimestamp};
}
public int[] getStationTimeInterval(String stationName) {
throwNull(stationName);
BTreeMap<String, SensorMeta> sensorMap = getSensorMap(stationName);
if (sensorMap == null || sensorMap.isEmpty()) {
return null;
}
int minTimestamp = Integer.MAX_VALUE;
int maxTimestamp = Integer.MIN_VALUE;
for (SensorMeta sensorMeta : sensorMap.values()) {
int[] interval = getSensorTimeInterval(sensorMeta);
if (interval != null) {
if (interval[0] < minTimestamp) {
minTimestamp = interval[0];
}
if (maxTimestamp < interval[1]) {
maxTimestamp = interval[1];
}
}
}
if (minTimestamp == Integer.MAX_VALUE || maxTimestamp == Integer.MIN_VALUE) {
return null;
}
return new int[] {minTimestamp, maxTimestamp};
}