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Eclipse Platform
Release 3.5

org.eclipse.team.core.diff.provider
Class TwoWayDiff

java.lang.Object
  extended by 

org.eclipse.team.core.diff.provider.Diff
      extended by 
org.eclipse.team.core.diff.provider.TwoWayDiff
All Implemented Interfaces:
IDiff, ITwoWayDiff
Direct Known Subclasses:
ResourceDiff

public class TwoWayDiff
extends Diff
implements ITwoWayDiff

Implementation of ITwoWayDiff. By default, this implementation returns null for the getFromPath() and getToPath(). Subclasses that support move diffs should override these methods.

This class may be subclassed by clients.

Since:
3.2

Field Summary
protected static int FLAG_MASK
          Constant (bit mask) that defines the area of the status that is reserved for use by this abstract class for encoding the flags of the diff.
 
Fields inherited from class org.eclipse.team.core.diff.provider. Diff
KIND_MASK
 
Fields inherited from interface org.eclipse.team.core.diff. ITwoWayDiff
CONTENT, COPY_FROM, MOVE_FROM, MOVE_TO, REPLACE
 
Fields inherited from interface org.eclipse.team.core.diff. IDiff
ADD, CHANGE, NO_CHANGE, REMOVE
 
Constructor Summary
TwoWayDiff ( IPath path, int kind, int flags)
          Create a two-way diff
 
Method Summary
 boolean equals ( Object obj)
           
 int getFlags ()
          Returns flags which describe in more detail how a object has been affected.
  IPath getFromPath ()
          Returns the full path (in the "before" state) from which this resource (in the "after" state) was moved.
  IPath getToPath ()
          Returns the full path (in the "after" state) to which this resource (in the "before" state) was moved.
 
Methods inherited from class org.eclipse.team.core.diff.provider. Diff
getKind, getPath, getStatus, hashCode, toDiffString
 
Methods inherited from class java.lang. Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.eclipse.team.core.diff. IDiff
getKind, getPath, toDiffString
 

Field Detail

FLAG_MASK

protected static final int FLAG_MASK
Constant (bit mask) that defines the area of the status that is reserved for use by this abstract class for encoding the flags of the diff. However, subclasses may include their own bits in the flag as long as they do not overlap with the bits in the FLAG_MASK

See Also:
Diff.getStatus(), Constant Field Values
Constructor Detail

TwoWayDiff

public TwoWayDiff(
IPath path,
                  int kind,
                  int flags)
Create a two-way diff

Parameters:
path - the path of the model object that has changed
kind - the kind of change
flags - additional flags that describe the change
Method Detail

getFlags

public int getFlags()
Description copied from interface: ITwoWayDiff
Returns flags which describe in more detail how a object has been affected.

The following codes (bit masks) are used when kind is CHANGE, and also when the object is involved in a move:

  • CONTENT - The bytes contained by the resource have been altered.
  • REPLACE - The object was deleted (either by a delete or move), and was subsequently re-created (either by a create, move, or copy).
The following code is only used if kind is REMOVE (or CHANGE in conjunction with REPLACE):
  • MOVE_TO - The object has moved. getToPath will return the path of where it was moved to.
The following code is only used if kind is ADD (or CHANGE in conjunction with REPLACE):
  • MOVE_FROM - The object has moved. getFromPath will return the path of where it was moved from.
  • COPY_FROM - The object has copied. getFromPath will return the path of where it was copied from.
A simple move operation would result in the following diff information. If a object is moved from A to B (with no other changes to A or B), then A will have kind REMOVE, with flag MOVE_TO, and getToPath on A will return the path for B. B will have kind ADD, with flag MOVE_FROM, and getFromPath on B will return the path for A. B's other flags will describe any other changes to the resource, as compared to its previous location at A.

Note that the move flags only describe the changes to a single object; they don't necessarily imply anything about the parent or children of the object. If the children were moved as a consequence of a subtree move operation, they will have corresponding move flags as well.

Specified by:
getFlags in interface ITwoWayDiff
Returns:
the flags
See Also:
ITwoWayDiff.CONTENT, ITwoWayDiff.MOVE_TO, ITwoWayDiff.MOVE_FROM, ITwoWayDiff.COPY_FROM, ITwoWayDiff.REPLACE, IDiff.getKind(), ITwoWayDiff.getFromPath(), ITwoWayDiff.getToPath()

getToPath

public 
IPath getToPath()
Description copied from interface: ITwoWayDiff
Returns the full path (in the "after" state) to which this resource (in the "before" state) was moved. This value is only valid if the MOVE_TO change flag is set; otherwise, null is returned.

Note: the returned path never has a trailing separator.

Specified by:
getToPath in interface ITwoWayDiff
Returns:
a path, or null
See Also:
ITwoWayDiff.getFromPath(), IDiff.getPath(), ITwoWayDiff.getFlags()

getFromPath

public 
IPath getFromPath()
Description copied from interface: ITwoWayDiff
Returns the full path (in the "before" state) from which this resource (in the "after" state) was moved. This value is only valid if the MOVE_FROM change flag is set; otherwise, null is returned.

Note: the returned path never has a trailing separator.

Specified by:
getFromPath in interface ITwoWayDiff
Returns:
a path, or null
See Also:
ITwoWayDiff.getToPath(), IDiff.getPath(), ITwoWayDiff.getFlags()

equals

public boolean equals(
Object obj)
Overrides:
equals in class Diff

Eclipse Platform
Release 3.5

Guidelines for using Eclipse APIs.

Copyright (c) Eclipse contributors and others 2000, 2008. All rights reserved.


 
 
  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire