org.apache.iotdb.db.utils

类 FileLoaderUtils

java.lang.Object

org.apache.iotdb.db.utils.FileLoaderUtils

public class FileLoaderUtils
extends Object

方法概要

限定符和类型	方法和说明
static void	checkTsFileResource(TsFileResource tsFileResource)
static List<IChunkMetadata>	loadChunkMetadataList(ITimeSeriesMetadata timeSeriesMetadata) load all chunk metadata of one time series in one file.
static List<IPageReader>	loadPageReaderList(IChunkMetadata chunkMetaData, Filter timeFilter) load all page readers in one chunk that satisfying the timeFilter
static AlignedTimeSeriesMetadata	loadTimeSeriesMetadata(TsFileResource resource, AlignedPath vectorPath, QueryContext context, Filter filter) Load VectorTimeSeriesMetadata for Vector
static TimeseriesMetadata	loadTimeSeriesMetadata(TsFileResource resource, PartialPath seriesPath, QueryContext context, Filter filter, Set<String> allSensors)
static void	updateTsFileResource(TsFileSequenceReader reader, TsFileResource tsFileResource)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

checkTsFileResource

public static void checkTsFileResource(TsFileResource tsFileResource)
                                throws IOException

抛出:

IOException

updateTsFileResource

public static void updateTsFileResource(TsFileSequenceReader reader,
                                        TsFileResource tsFileResource)
                                 throws IOException

抛出:

IOException

loadTimeSeriesMetadata

public static TimeseriesMetadata loadTimeSeriesMetadata(TsFileResource resource,
                                                        PartialPath seriesPath,
                                                        QueryContext context,
                                                        Filter filter,
                                                        Set<String> allSensors)
                                                 throws IOException

参数:

resource - TsFile

seriesPath - Timeseries path

allSensors - measurements queried at the same time of this device

filter - any filter, only used to check time range

抛出:

IOException

loadTimeSeriesMetadata

public static AlignedTimeSeriesMetadata loadTimeSeriesMetadata(TsFileResource resource,
                                                               AlignedPath vectorPath,
                                                               QueryContext context,
                                                               Filter filter)
                                                        throws IOException

Load VectorTimeSeriesMetadata for Vector

参数:

resource - corresponding TsFileResource

vectorPath - instance of VectorPartialPath, vector's full path, e.g. (root.sg1.d1.vector, [root.sg1.d1.vector.s1, root.sg1.d1.vector.s2])

抛出:

IOException

loadChunkMetadataList

public static List<IChunkMetadata> loadChunkMetadataList(ITimeSeriesMetadata timeSeriesMetadata)
                                                  throws IOException

load all chunk metadata of one time series in one file.

参数:

timeSeriesMetadata - the corresponding TimeSeriesMetadata in that file.

抛出:

IOException

loadPageReaderList

public static List<IPageReader> loadPageReaderList(IChunkMetadata chunkMetaData,
                                                   Filter timeFilter)
                                            throws IOException

load all page readers in one chunk that satisfying the timeFilter

参数:

chunkMetaData - the corresponding chunk metadata

timeFilter - it should be a TimeFilter instead of a ValueFilter

抛出:

IOException