org.apache.iotdb.db.metadata.path

类 PartialPath

java.lang.Object

org.apache.iotdb.tsfile.read.common.Path

org.apache.iotdb.db.metadata.path.PartialPath

所有已实现的接口:

Serializable, Cloneable, Comparable<Path>

直接已知子类:

AlignedPath, MeasurementPath

public class PartialPath
extends Path
implements Comparable<Path>, Cloneable

A prefix path, suffix path or fullPath generated from SQL. Usually used in the IoTDB server module

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
protected String[]	nodes

从类继承的字段 org.apache.iotdb.tsfile.read.common.Path

device, fullPath

构造器概要

构造器

构造器和说明
PartialPath()
PartialPath(String path) Construct the PartialPath using a String, will split the given String into String[] E.g., path = "root.sg.
PartialPath(String[] partialNodes)
PartialPath(String path, boolean needSplit)
PartialPath(String device, String measurement)

方法概要

限定符和类型	方法和说明
List<PartialPath>	alterPrefixPath(PartialPath prefix) Return the intersection of paths starting with the given prefix and paths matching this path pattern.
PartialPath	clone()
int	compareTo(Path path)
PartialPath	concatNode(String node)
PartialPath	concatPath(PartialPath partialPath) it will return a new partial path
void	concatPath(String[] otherNodes) It will change nodes in this partial path
PartialPath	copy()
LastPointReader	createLastPointReader(TSDataType dataType, Set<String> deviceMeasurements, QueryContext context, QueryDataSource dataSource, long queryTime, Filter timeFilter)
SeriesReader	createSeriesReader(Set<String> allSensors, TSDataType dataType, QueryContext context, List<TsFileResource> seqFileResource, List<TsFileResource> unseqFileResource, Filter timeFilter, Filter valueFilter, boolean ascending)
SeriesReader	createSeriesReader(Set<String> allSensors, TSDataType dataType, QueryContext context, QueryDataSource dataSource, Filter timeFilter, Filter valueFilter, TsFileFilter fileFilter, boolean ascending)
TsFileResource	createTsFileResource(List<ReadOnlyMemChunk> readOnlyMemChunk, List<IChunkMetadata> chunkMetadataList, TsFileResource originTsFileResource)
boolean	equals(Object obj)
boolean	equals(String obj)
static List<PartialPath>	fromStringList(List<String> pathList) Convert a list of Strings to a list of PartialPaths, ignoring all illegal paths
ITimeSeriesMetadata	generateTimeSeriesMetadata(List<ReadOnlyMemChunk> readOnlyMemChunk, List<IChunkMetadata> chunkMetadataList)
String	getDevice()
PartialPath	getDevicePath()
String	getFirstNode()
String	getFullPath()
String	getFullPathWithAlias()
String	getMeasurement()
String	getMeasurementAlias()
IMeasurementSchema	getMeasurementSchema()
protected List<Modification>	getModificationsForMemtable(IMemTable memTable, List<Pair<Modification,IMemTable>> modsToMemtable) get modifications from a memtable.
int	getNodeLength()
String[]	getNodes()
ReadOnlyMemChunk	getReadOnlyMemChunkFromMemTable(IMemTable memTable, List<Pair<Modification,IMemTable>> modsToMemtable, long timeLowerBound) get the ReadOnlyMemChunk from the given MemTable.
TSDataType	getSeriesType()
String	getTailNode()
List<IChunkMetadata>	getVisibleMetadataListFromWriter(RestorableTsFileIOWriter writer, TsFileResource tsFileResource, QueryContext context)
int	hashCode()
boolean	isMeasurementAliasExists()
boolean	matchFullPath(PartialPath rPath) Test if this PartialPath matches a full path.
boolean	matchPrefixPath(PartialPath rPath) Test if this PartialPath matches a full path's prefix.
void	setMeasurementAlias(String measurementAlias)
boolean	startsWith(String[] otherNodes)
String	toString()
static List<String>	toStringList(List<PartialPath> pathList)
Path	toTSFilePath()

从类继承的方法 org.apache.iotdb.tsfile.read.common.Path

getColumnNum, setMeasurement

从类继承的方法 java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

字段详细资料

nodes

protected String[] nodes

构造器详细资料

PartialPath

public PartialPath()

PartialPath

public PartialPath(String path)
            throws IllegalPathException

Construct the PartialPath using a String, will split the given String into String[] E.g., path = "root.sg.\"d.1\".\"s.1\"" nodes = {"root", "sg", "\"d.1\"", "\"s.1\""}

参数:

path - a full String of a time series path

抛出:

IllegalPathException

PartialPath

public PartialPath(String device,
                   String measurement)
            throws IllegalPathException

抛出:

IllegalPathException

PartialPath

public PartialPath(String[] partialNodes)

参数:

partialNodes - nodes of a time series path

PartialPath

public PartialPath(String path,
                   boolean needSplit)

参数:

path - path

needSplit - needSplit is basically false, whether need to be split to device and measurement, doesn't support escape character yet.

方法详细资料

concatPath

public PartialPath concatPath(PartialPath partialPath)

it will return a new partial path

参数:

partialPath - the path you want to concat

返回:

new partial path

concatPath

public void concatPath(String[] otherNodes)

It will change nodes in this partial path

参数:

otherNodes - nodes

concatNode

public PartialPath concatNode(String node)

getNodes

public String[] getNodes()

getNodeLength

public int getNodeLength()

getTailNode

public String getTailNode()

alterPrefixPath

public List<PartialPath> alterPrefixPath(PartialPath prefix)

Return the intersection of paths starting with the given prefix and paths matching this path pattern.

For example, minimizing "root.**.b.c" with prefix "root.a.b" produces "root.a.b.c", "root.a.b.b.c", "root.a.b.**.b.c", since the multi-level wildcard can match 'a', 'a.b', and any other sub paths start with 'a.b'.

The goal of this method is to reduce the search space when querying a storage group with a path with wildcard.

参数:

prefix - The prefix. Cannot be null and cannot contain any wildcard.

matchFullPath

public boolean matchFullPath(PartialPath rPath)

Test if this PartialPath matches a full path. This partialPath acts as a full path pattern. rPath is supposed to be a full timeseries path without wildcards. e.g. "root.sg.device.*" matches path "root.sg.device.s1" whereas it does not match "root.sg.device" and "root.sg.vehicle.s1"

参数:

rPath - a plain full path of a timeseries

返回:

true if a successful match, otherwise return false

matchPrefixPath

public boolean matchPrefixPath(PartialPath rPath)

Test if this PartialPath matches a full path's prefix. This partialPath acts as a prefix path pattern. rPath is supposed to be a full timeseries path without wildcards. e.g. "root.sg" or "root.*" both match path "root.sg.device.s1", "root.sg.device" and "root.sg.vehicle.s1"

参数:

rPath - a plain full path of a timeseries

返回:

true if a successful match, otherwise return false

getFullPath

public String getFullPath()

覆盖:

getFullPath 在类中 Path

copy

public PartialPath copy()

equals

public boolean equals(Object obj)

覆盖:

equals 在类中 Path

equals

public boolean equals(String obj)

覆盖:

equals 在类中 Path

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Path

getMeasurement

public String getMeasurement()

覆盖:

getMeasurement 在类中 Path

getFirstNode

public String getFirstNode()

getDevice

public String getDevice()

覆盖:

getDevice 在类中 Path

getMeasurementAlias

public String getMeasurementAlias()

setMeasurementAlias

public void setMeasurementAlias(String measurementAlias)

isMeasurementAliasExists

public boolean isMeasurementAliasExists()

getFullPathWithAlias

public String getFullPathWithAlias()

覆盖:

getFullPathWithAlias 在类中 Path

getMeasurementSchema

public IMeasurementSchema getMeasurementSchema()
                                        throws MetadataException

抛出:

MetadataException

getSeriesType

public TSDataType getSeriesType()
                         throws UnsupportedOperationException

抛出:

UnsupportedOperationException

compareTo

public int compareTo(Path path)

指定者:

compareTo 在接口中 Comparable<Path>

覆盖:

compareTo 在类中 Path

startsWith

public boolean startsWith(String[] otherNodes)

toString

public String toString()

覆盖:

toString 在类中 Path

getDevicePath

public PartialPath getDevicePath()

toTSFilePath

public Path toTSFilePath()

toStringList

public static List<String> toStringList(List<PartialPath> pathList)

fromStringList

public static List<PartialPath> fromStringList(List<String> pathList)

Convert a list of Strings to a list of PartialPaths, ignoring all illegal paths

参数:

pathList -

返回:

createLastPointReader

public LastPointReader createLastPointReader(TSDataType dataType,
                                             Set<String> deviceMeasurements,
                                             QueryContext context,
                                             QueryDataSource dataSource,
                                             long queryTime,
                                             Filter timeFilter)

createSeriesReader

public SeriesReader createSeriesReader(Set<String> allSensors,
                                       TSDataType dataType,
                                       QueryContext context,
                                       QueryDataSource dataSource,
                                       Filter timeFilter,
                                       Filter valueFilter,
                                       TsFileFilter fileFilter,
                                       boolean ascending)

createSeriesReader

public SeriesReader createSeriesReader(Set<String> allSensors,
                                       TSDataType dataType,
                                       QueryContext context,
                                       List<TsFileResource> seqFileResource,
                                       List<TsFileResource> unseqFileResource,
                                       Filter timeFilter,
                                       Filter valueFilter,
                                       boolean ascending)

createTsFileResource

public TsFileResource createTsFileResource(List<ReadOnlyMemChunk> readOnlyMemChunk,
                                           List<IChunkMetadata> chunkMetadataList,
                                           TsFileResource originTsFileResource)
                                    throws IOException

抛出:

IOException

generateTimeSeriesMetadata

public ITimeSeriesMetadata generateTimeSeriesMetadata(List<ReadOnlyMemChunk> readOnlyMemChunk,
                                                      List<IChunkMetadata> chunkMetadataList)
                                               throws IOException

抛出:

IOException

getReadOnlyMemChunkFromMemTable

public ReadOnlyMemChunk getReadOnlyMemChunkFromMemTable(IMemTable memTable,
                                                        List<Pair<Modification,IMemTable>> modsToMemtable,
                                                        long timeLowerBound)
                                                 throws QueryProcessException,
                                                        IOException

get the ReadOnlyMemChunk from the given MemTable.

返回:

ReadOnlyMemChunk

抛出:

QueryProcessException

IOException

getModificationsForMemtable

protected List<Modification> getModificationsForMemtable(IMemTable memTable,
                                                         List<Pair<Modification,IMemTable>> modsToMemtable)

get modifications from a memtable.

clone

public PartialPath clone()

覆盖:

clone 在类中 Path

getVisibleMetadataListFromWriter

public List<IChunkMetadata> getVisibleMetadataListFromWriter(RestorableTsFileIOWriter writer,
                                                             TsFileResource tsFileResource,
                                                             QueryContext context)