StandardDirectoryReader

SegmentReader

SegmentReader

SegmentReader

LeafReader [ ]数组

...

SegmentCommitInfo

u130_seg0
u131_seg0
u132_seg0
u133_seg0

SegName

SegID

SegCodec

DelGen

DeletionCount

FieldInfosGen

DocValuesGen

SoftDelCount

FieldInfosFiles

UpdatesFiles

u145_seg0
u146_seg0

Header

LuceneVersion

IndexCreatedVersionMajor

Version

NameCounter

SegCount

MinSegmentLuceneVersion

SegmentCommitInfo

SegmentCommitInfo

CommitUserData

Footer

... ...

Header

SegVersion

SegSize

IsCompoundFile

Diagnostics

Files

Attributes

IndexSort

Footer

索引文件.si

索引文件segment_N