FileDiffCache (Gerrit Review Plugin API Documentation)

All Known Implementing Classes:

FileDiffCacheImpl
```
public interface FileDiffCache
```
This cache computes the git diff for a single file path and adds some extra logic, e.g. for identifying edits that are due to rebase.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`FileDiffOutput`	`get(FileDiffCacheKey key)`	Returns the file diff for a single file path identified by its key.
`com.google.common.collect.ImmutableMap<FileDiffCacheKey,FileDiffOutput>`	`getAll(Iterable<FileDiffCacheKey> keys)`	Returns the file diff for a collection of file paths identified by their keys.

- Method Detail
  - get
```
FileDiffOutput get(FileDiffCacheKey key)
            throws DiffNotAvailableException
```
    Returns the file diff for a single file path identified by its key.
    
    Parameters:
    
    key - identifies two git commits, a specific file path and other diff parameters.
    
    Returns:
    
    the file diff for a single file path identified by its key.
    
    Throws:
    
    DiffNotAvailableException - if the commit IDs of the key are invalid for this project or if file contents could not be read.
  - getAll
```
com.google.common.collect.ImmutableMap<FileDiffCacheKey,FileDiffOutput> getAll(Iterable<FileDiffCacheKey> keys)
                                                                              throws DiffNotAvailableException
```
    Returns the file diff for a collection of file paths identified by their keys.
    
    Parameters:
    
    keys - identifying different file paths of different projects.
    
    Returns:
    
    a map of the input keys to their corresponding git file diffs.
    
    Throws:
    
    DiffNotAvailableException - if the diff failed to be evaluated for one or more of the input keys due to invalid commit IDs or if file contents could not be read.