MergePolicy.MergeContext (Lucene 9.11.1 core API)

All Known Implementing Classes:

IndexWriter

Enclosing class:

MergePolicy
```
public static interface MergePolicy.MergeContext
```
This interface represents the current context of the merge selection process. It allows to access real-time information like the currently merging segments or how many deletes a segment would claim back if merged. This context might be stateful and change during the execution of a merge policy's selection processes.

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

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`InfoStream`	`getInfoStream()`	Returns the info stream that can be used to log messages
`Set<SegmentCommitInfo>`	`getMergingSegments()`	Returns an unmodifiable set of segments that are currently merging.
`int`	`numDeletedDocs(SegmentCommitInfo info)`	Returns the number of deleted documents in the given segments.
`int`	`numDeletesToMerge(SegmentCommitInfo info)`	Returns the number of deletes a merge would claim back if the given segment is merged.

- Method Detail
  - numDeletesToMerge
```
int numDeletesToMerge(SegmentCommitInfo info)
               throws IOException
```
    Returns the number of deletes a merge would claim back if the given segment is merged.
    
    Parameters:
    
    info - the segment to get the number of deletes for
    
    Throws:
    
    IOException
    
    See Also:
    
    MergePolicy.numDeletesToMerge(SegmentCommitInfo, int, org.apache.lucene.util.IOSupplier)
  - numDeletedDocs
```
int numDeletedDocs(SegmentCommitInfo info)
```
    Returns the number of deleted documents in the given segments.
  - getInfoStream
```
InfoStream getInfoStream()
```
    Returns the info stream that can be used to log messages
  - getMergingSegments
```
Set<SegmentCommitInfo> getMergingSegments()
```
    Returns an unmodifiable set of segments that are currently merging.