## org.apache.lucene.index
Class SegmentInfoPerCommit

    java.lang.Object
      org.apache.lucene.index.SegmentInfoPerCommit

    public class SegmentInfoPerCommit

extends Object

Embeds a [read-only] SegmentInfo and adds per-commit fields.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Field Summary
`SegmentInfo` `info` The `SegmentInfo` that we wrap.

Constructor Summary
`SegmentInfoPerCommit(SegmentInfo info, int delCount, long delGen)` Sole constructor.

Method Summary
`SegmentInfoPerCommit` `clone()`
`Collection<String>` `files()` Returns all files in use by this segment.
`int` `getDelCount()` Returns the number of deleted docs in the segment.
`long` `getDelGen()` Returns generation number of the live docs file or -1 if there are no deletes yet.
`long` `getNextDelGen()` Returns the next available generation number of the live docs file.
`boolean` `hasDeletions()` Returns true if there are any deletions for the segment at this commit.
`void` `setDelGen(long delGen)` Sets the generation number of the live docs file.
`long` `sizeInBytes()` Returns total size in bytes of all files for this segment.
`String` `toString()`
`String` `toString(Directory dir, int pendingDelCount)` Returns a description of this segment.

Methods inherited from class java.lang.Object
`equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

### info

    public final SegmentInfo info

  The `SegmentInfo` that we wrap.

Constructor Detail

### SegmentInfoPerCommit

    public SegmentInfoPerCommit(SegmentInfo info,
                                int delCount,
                                long delGen)

  Sole constructor.

  Parameters:
    `info` - `SegmentInfo` that we wrap
    `delCount` - number of deleted documents in this segment
    `delGen` - deletion generation number (used to name deletion files)

Method Detail

### sizeInBytes

    public long sizeInBytes()
                     throws IOException

  Returns total size in bytes of all files for this segment.

  NOTE: This value is not correct for 3.0 segments that have shared docstores. To get the correct value, upgrade!

  Throws:
    `IOException`

### files

    public Collection<String> files()
                             throws IOException

  Returns all files in use by this segment.

  Throws:
    `IOException`

### setDelGen

    public void setDelGen(long delGen)

  Sets the generation number of the live docs file.

  See Also:
    `getDelGen()`

### hasDeletions

    public boolean hasDeletions()

  Returns true if there are any deletions for the segment at this commit.

### getNextDelGen

    public long getNextDelGen()

  Returns the next available generation number of the live docs file.

### getDelGen

    public long getDelGen()

  Returns generation number of the live docs file or -1 if there are no deletes yet.

### getDelCount

    public int getDelCount()

  Returns the number of deleted docs in the segment.

### toString

    public String toString(Directory dir,
                           int pendingDelCount)

  Returns a description of this segment.

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`

### clone

    public SegmentInfoPerCommit clone()

  Overrides:
    `clone` in class `Object`

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