Indexer (Syncany API Documentation)

java.lang.Object
- org.syncany.operations.up.Indexer

```
public class Indexer
extends java.lang.Object
```
The indexer combines the chunking process with the corresponding database lookups for the resulting chunks. It implements the deduplication mechanism of Syncany.
The class takes a list of files as input and uses the Deduper to break these files into individual chunks. By implementing the DeduperListener, it reacts on chunking events and creates a new database version (with the newly added/changed/removed files. This functionality is entirely implemented by the index() method.
The class uses the currently loaded MemoryDatabase as well as a potential dirty database into account. Lookups for chunks and file histories are performed on both databases.

Constructor Summary

Constructors
Constructor Description

Indexer(Config config, Deduper deduper)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`index(java.util.List<java.io.File> files, java.util.List<java.io.File> deletedFiles, java.util.Queue<DatabaseVersion> databaseVersionQueue)`	This method implements the index/deduplication functionality of Syncany.

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

- Constructor Detail
  - Indexer
```
public Indexer(Config config,
               Deduper deduper)
```
- Method Detail
  - index
```
public void index(java.util.List<java.io.File> files,
                  java.util.List<java.io.File> deletedFiles,
                  java.util.Queue<DatabaseVersion> databaseVersionQueue)
           throws java.io.IOException
```
    This method implements the index/deduplication functionality of Syncany. It uses a Deduper to break files down, compares them to the local database and creates a new DatabaseVersion as a result.
    Depending on what has changed, the new database version will contain new instances of PartialFileHistory, FileVersion, FileContent, ChunkEntry and MultiChunkEntry.
    
    Parameters:
    
    files - List of files to be deduplicated
    
    deletedFiles - List of files that have been deleted
    
    databaseVersionQueue - Queue to which created databaseVersions are offered
    
    Throws:
    
    java.io.IOException - If the chunking/deduplication cannot read/process any of the files