Class RevFilter

  extended by org.eclipse.jgit.revwalk.filter.RevFilter
Direct Known Subclasses:
AndRevFilter, CommitTimeRevFilter, MaxCountRevFilter, NotRevFilter, OrRevFilter, PatternMatchRevFilter, RevFlagFilter, SkipRevFilter, SubStringRevFilter

public abstract class RevFilter
extends Object

Selects interesting revisions during walking.

This is an abstract interface. Applications may implement a subclass, or use one of the predefined implementations already available within this package. Filters may be chained together using AndRevFilter and OrRevFilter to create complex boolean expressions.

Applications should install the filter on a RevWalk by RevWalk.setRevFilter(RevFilter) prior to starting traversal.

Unless specifically noted otherwise a RevFilter implementation is not thread safe and may not be shared by different RevWalk instances at the same time. This restriction allows RevFilter implementations to cache state within their instances during include(RevWalk, RevCommit) if it is beneficial to their implementation. Deep clones created by clone() may be used to construct a thread-safe copy of an existing filter.

Message filters:

Merge filters:

Boolean modifiers:

Field Summary
static RevFilter ALL
          Default filter that always returns true (thread safe).
static RevFilter MERGE_BASE
          Selects only merge bases of the starting points (thread safe).
static RevFilter NO_MERGES
          Excludes commits with more than one parent (thread safe).
static RevFilter NONE
          Default filter that always returns false (thread safe).
Constructor Summary
Method Summary
abstract  RevFilter clone()
          Clone this revision filter, including its parameters.
abstract  boolean include(RevWalk walker, RevCommit cmit)
          Determine if the supplied commit should be included in results.
 RevFilter negate()
          Create a new filter that does the opposite of this filter.
 boolean requiresCommitBody()
 String toString()
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail


public static final RevFilter ALL
Default filter that always returns true (thread safe).


public static final RevFilter NONE
Default filter that always returns false (thread safe).


public static final RevFilter NO_MERGES
Excludes commits with more than one parent (thread safe).


public static final RevFilter MERGE_BASE
Selects only merge bases of the starting points (thread safe).

This is a special case filter that cannot be combined with any other filter. Its include method always throws an exception as context information beyond the arguments is necessary to determine if the supplied commit is a merge base.

Constructor Detail


public RevFilter()
Method Detail


public RevFilter negate()
Create a new filter that does the opposite of this filter.

a new filter that includes commits this filter rejects.


public boolean requiresCommitBody()
true if the filter needs the commit body to be parsed.


public abstract boolean include(RevWalk walker,
                                RevCommit cmit)
                         throws StopWalkException,
Determine if the supplied commit should be included in results.

walker - the active walker this filter is being invoked from within.
cmit - the commit currently being tested. The commit has been parsed and its body is available for inspection only if the filter returns true from requiresCommitBody().
true to include this commit in the results; false to have this commit be omitted entirely from the results.
StopWalkException - the filter knows for certain that no additional commits can ever match, and the current commit doesn't match either. The walk is halted and no more results are provided.
MissingObjectException - an object the filter needs to consult to determine its answer does not exist in the Git repository the walker is operating on. Filtering this commit is impossible without the object.
IncorrectObjectTypeException - an object the filter needed to consult was not of the expected object type. This usually indicates a corrupt repository, as an object link is referencing the wrong type.
IOException - a loose object or pack file could not be read to obtain data necessary for the filter to make its decision.


public abstract RevFilter clone()
Clone this revision filter, including its parameters.

This is a deep clone. If this filter embeds objects or other filters it must also clone those, to ensure the instances do not share mutable data.

clone in class Object
another copy of this filter, suitable for another thread.


public String toString()
toString in class Object

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