TsFileIdentifier (IoTDB Server 0.13.2 API)

java.lang.Object
- org.apache.iotdb.db.engine.compaction.TsFileIdentifier

```
public class TsFileIdentifier
extends Object
```
This class record the logical information of files in compaction, which is used to locate file in disk. File identifier includes whether the file is sequence, its storage group name, virtual storage group id, time partition id and file name. This class cannot be initialized directly. We provide some static methods to create instance of this class.

字段概要

字段
限定符和类型	字段和说明
`static int`	`FILE_NAME_OFFSET_IN_LOG`
`static int`	`FILE_NAME_OFFSET_IN_PATH`
`static String`	`INFO_SEPARATOR`
`static int`	`LOGICAL_SG_OFFSET_IN_LOG`
`static int`	`LOGICAL_SG_OFFSET_IN_PATH`
`static int`	`SEQUENCE_OFFSET_IN_LOG`
`static int`	`SEQUENCE_OFFSET_IN_PATH`
`static int`	`TIME_PARTITION_OFFSET_IN_LOG`
`static int`	`TIME_PARTITION_OFFSET_IN_PATH`
`static int`	`VIRTUAL_SG_OFFSET_IN_LOG`
`static int`	`VIRTUAL_SG_OFFSET_IN_PATH`

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法和说明
`boolean`	`equals(Object other)`
`File`	`getFileFromDataDirs()` This method find the File object of current file by searching it in every data directory.
`static TsFileIdentifier`	`getFileIdentifierFromFilePath(String filepath)` This function generates an instance of CompactionFileIdentifier by parsing the path of a tsfile.
`static TsFileIdentifier`	`getFileIdentifierFromInfoString(String infoString)` This function generates an instance of CompactionFileIdentifier by parsing the info string of a tsfile(usually recorded in a compaction.log), such as “sequence root.test.sg 0 0 0-0-0-0.tsfile"
`static TsFileIdentifier`	`getFileIdentifierFromOldInfoString(String oldInfoString)` This function generates an instance of CompactionFileIdentifier by parsing the old info string from previous version (<0.13) of a tsfile(usually recorded in a compaction.log).
`String`	`getFilename()`
`String`	`getFilePath()`
`String`	`getLogicalStorageGroupName()`
`String`	`getTimePartitionId()`
`String`	`getVirtualStorageGroupId()`
`boolean`	`isSequence()`
`String`	`toString()`

从类继承的方法 java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- 字段详细资料
  - INFO_SEPARATOR
```
public static final String INFO_SEPARATOR
```
    另请参阅:
    
    常量字段值
  - FILE_NAME_OFFSET_IN_PATH
```
public static final int FILE_NAME_OFFSET_IN_PATH
```
    另请参阅:
    
    常量字段值
  - TIME_PARTITION_OFFSET_IN_PATH
```
public static final int TIME_PARTITION_OFFSET_IN_PATH
```
    另请参阅:
    
    常量字段值
  - VIRTUAL_SG_OFFSET_IN_PATH
```
public static final int VIRTUAL_SG_OFFSET_IN_PATH
```
    另请参阅:
    
    常量字段值
  - LOGICAL_SG_OFFSET_IN_PATH
```
public static final int LOGICAL_SG_OFFSET_IN_PATH
```
    另请参阅:
    
    常量字段值
  - SEQUENCE_OFFSET_IN_PATH
```
public static final int SEQUENCE_OFFSET_IN_PATH
```
    另请参阅:
    
    常量字段值
  - SEQUENCE_OFFSET_IN_LOG
```
public static final int SEQUENCE_OFFSET_IN_LOG
```
    另请参阅:
    
    常量字段值
  - LOGICAL_SG_OFFSET_IN_LOG
```
public static final int LOGICAL_SG_OFFSET_IN_LOG
```
    另请参阅:
    
    常量字段值
  - VIRTUAL_SG_OFFSET_IN_LOG
```
public static final int VIRTUAL_SG_OFFSET_IN_LOG
```
    另请参阅:
    
    常量字段值
  - TIME_PARTITION_OFFSET_IN_LOG
```
public static final int TIME_PARTITION_OFFSET_IN_LOG
```
    另请参阅:
    
    常量字段值
  - FILE_NAME_OFFSET_IN_LOG
```
public static final int FILE_NAME_OFFSET_IN_LOG
```
    另请参阅:
    
    常量字段值
- 方法详细资料
  - getFileIdentifierFromFilePath
```
public static TsFileIdentifier getFileIdentifierFromFilePath(String filepath)
```
    This function generates an instance of CompactionFileIdentifier by parsing the path of a tsfile. Notice, the path of the file should include information of its logical storage group, virtual storage group id, time partition, sequence or not and its filename, such as "sequence/root.test.sg/0/0/1-1-0-0.tsfile".
  - getFileIdentifierFromInfoString
```
public static TsFileIdentifier getFileIdentifierFromInfoString(String infoString)
```
    This function generates an instance of CompactionFileIdentifier by parsing the info string of a tsfile(usually recorded in a compaction.log), such as “sequence root.test.sg 0 0 0-0-0-0.tsfile"
  - getFileIdentifierFromOldInfoString
```
public static TsFileIdentifier getFileIdentifierFromOldInfoString(String oldInfoString)
```
    This function generates an instance of CompactionFileIdentifier by parsing the old info string from previous version (<0.13) of a tsfile(usually recorded in a compaction.log). Such as “root.test.sg 0 0 1-1-0-0.tsfile true" from old cross space compaction log and "root.test.sg 0 0 1-1-0-0.tsfile sequence" from old inner space compaction log.
  - toString
```
public String toString()
```
    覆盖:
    
    toString 在类中 Object
  - equals
```
public boolean equals(Object other)
```
    覆盖:
    
    equals 在类中 Object
  - getFileFromDataDirs
```
public File getFileFromDataDirs()
```
    This method find the File object of current file by searching it in every data directory. If the file is not found, it will return null.
  - getFilename
```
public String getFilename()
```
  - getFilePath
```
public String getFilePath()
```
  - getLogicalStorageGroupName
```
public String getLogicalStorageGroupName()
```
  - getVirtualStorageGroupId
```
public String getVirtualStorageGroupId()
```
  - getTimePartitionId
```
public String getTimePartitionId()
```
  - isSequence
```
public boolean isSequence()
```

类 TsFileIdentifier

字段概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

INFO_SEPARATOR

FILE_NAME_OFFSET_IN_PATH

TIME_PARTITION_OFFSET_IN_PATH

VIRTUAL_SG_OFFSET_IN_PATH

LOGICAL_SG_OFFSET_IN_PATH

SEQUENCE_OFFSET_IN_PATH

SEQUENCE_OFFSET_IN_LOG

LOGICAL_SG_OFFSET_IN_LOG

VIRTUAL_SG_OFFSET_IN_LOG

TIME_PARTITION_OFFSET_IN_LOG

FILE_NAME_OFFSET_IN_LOG

方法详细资料

getFileIdentifierFromFilePath

getFileIdentifierFromInfoString

getFileIdentifierFromOldInfoString

toString

equals

getFileFromDataDirs

getFilename

getFilePath

getLogicalStorageGroupName

getVirtualStorageGroupId

getTimePartitionId

isSequence