Package org.apache.iotdb.db.utils

Class FileLoaderUtils

java.lang.Object

org.apache.iotdb.db.utils.FileLoaderUtils

public class FileLoaderUtils
extends java.lang.Object

Method Summary

Modifier and Type	Method	Description
static java.util.List<org.apache.iotdb.tsfile.file.metadata.IChunkMetadata>	loadChunkMetadataList(org.apache.iotdb.tsfile.file.metadata.ITimeSeriesMetadata timeSeriesMetadata)	load all chunk metadata of one time series in one file.
static void	loadOrGenerateResource(TsFileResource tsFileResource)
static java.util.List<org.apache.iotdb.tsfile.read.reader.IPageReader>	loadPageReaderList(org.apache.iotdb.tsfile.file.metadata.IChunkMetadata chunkMetaData, org.apache.iotdb.tsfile.read.filter.basic.Filter timeFilter)	load all page readers in one chunk that satisfying the timeFilter
static org.apache.iotdb.tsfile.file.metadata.TimeseriesMetadata	loadTimeSeriesMetadata(TsFileResource resource, org.apache.iotdb.commons.path.PartialPath seriesPath, QueryContext context, org.apache.iotdb.tsfile.read.filter.basic.Filter filter, java.util.Set<java.lang.String> allSensors)
static org.apache.iotdb.tsfile.file.metadata.AlignedTimeSeriesMetadata	loadTimeSeriesMetadata(TsFileResource resource, AlignedPath vectorPath, QueryContext context, org.apache.iotdb.tsfile.read.filter.basic.Filter filter)	Load VectorTimeSeriesMetadata for Vector
static void	updateTsFileResource(org.apache.iotdb.tsfile.read.TsFileSequenceReader reader, TsFileResource tsFileResource)

Methods inherited from class java.lang.Object

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

Method Detail

loadOrGenerateResource

public static void loadOrGenerateResource(TsFileResource tsFileResource)
                                   throws java.io.IOException

Throws:

java.io.IOException

updateTsFileResource

public static void updateTsFileResource(org.apache.iotdb.tsfile.read.TsFileSequenceReader reader,
                                        TsFileResource tsFileResource)
                                 throws java.io.IOException

Throws:

java.io.IOException

loadTimeSeriesMetadata

public static org.apache.iotdb.tsfile.file.metadata.TimeseriesMetadata loadTimeSeriesMetadata(TsFileResource resource,
                                                                                              org.apache.iotdb.commons.path.PartialPath seriesPath,
                                                                                              QueryContext context,
                                                                                              org.apache.iotdb.tsfile.read.filter.basic.Filter filter,
                                                                                              java.util.Set<java.lang.String> allSensors)
                                                                                       throws java.io.IOException

Parameters:

resource - TsFile

seriesPath - Timeseries path

allSensors - measurements queried at the same time of this device

filter - any filter, only used to check time range

Throws:

java.io.IOException

loadTimeSeriesMetadata

public static org.apache.iotdb.tsfile.file.metadata.AlignedTimeSeriesMetadata loadTimeSeriesMetadata(TsFileResource resource,
                                                                                                     AlignedPath vectorPath,
                                                                                                     QueryContext context,
                                                                                                     org.apache.iotdb.tsfile.read.filter.basic.Filter filter)
                                                                                              throws java.io.IOException

Load VectorTimeSeriesMetadata for Vector

Parameters:

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])

Throws:

java.io.IOException

loadChunkMetadataList

public static java.util.List<org.apache.iotdb.tsfile.file.metadata.IChunkMetadata> loadChunkMetadataList(org.apache.iotdb.tsfile.file.metadata.ITimeSeriesMetadata timeSeriesMetadata)
                                                                                                  throws java.io.IOException

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

Parameters:

timeSeriesMetadata - the corresponding TimeSeriesMetadata in that file.

Throws:

java.io.IOException

loadPageReaderList

public static java.util.List<org.apache.iotdb.tsfile.read.reader.IPageReader> loadPageReaderList(org.apache.iotdb.tsfile.file.metadata.IChunkMetadata chunkMetaData,
                                                                                                 org.apache.iotdb.tsfile.read.filter.basic.Filter timeFilter)
                                                                                          throws java.io.IOException

load all page readers in one chunk that satisfying the timeFilter

Parameters:

chunkMetaData - the corresponding chunk metadata

timeFilter - it should be a TimeFilter instead of a ValueFilter

Throws:

java.io.IOException