| Name | Description | Type | Package | Framework |
| MergePolicy | Expert: a MergePolicy determines the sequence of primitive merge operations. | Class | org.apache.lucene.index | Apache Lucene |
| MergePolicy .DocMap | Class | org.apache.lucene.index.MergePolicy | Apache Lucene | |
| MergePolicy .MergeAbortedException | Thrown when a merge was explicity aborted because IndexWriter. | Class | org.apache.lucene.index.MergePolicy | Apache Lucene |
| MergePolicy .MergeException | Exception thrown if there are any problems while executing a merge. | Class | org.apache.lucene.index.MergePolicy | Apache Lucene |
| MergePolicy .MergeSpecification | A MergeSpecification instance provides the information necessary to perform multiple merges. | Class | org.apache.lucene.index.MergePolicy | Apache Lucene |
| MergePolicy .OneMerge | OneMerge provides the information necessary to perform an individual primitive merge operation, resulting in | Class | org.apache.lucene.index.MergePolicy | Apache Lucene |
| MergePolicyWrapper | A wrapper for MergePolicy instances. | Class | org.apache.lucene.index | Apache Lucene |