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Eclipse Platform
Release 3.5
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org.eclipse.compare.rangedifferencer
Class RangeDifference


java.lang.Object
  extended by 
org.eclipse.compare.rangedifferencer.RangeDifference

public class RangeDifference

extends 
Object

Description of a change between two or three ranges of comparable entities.

RangeDifference objects are the elements of a compare result returned from the RangeDifferencer find* methods. Clients use these objects as they are returned from the differencer. This class is not intended to be instantiated outside of the Compare framework.

Note: A range in the RangeDifference object is given as a start index and length in terms of comparable entities. However, these entity indices and counts are not necessarily character positions. For example, if an entity represents a line in a document, the start index would be a line number and the count would be in lines.

See Also:
RangeDifferencer
Restriction:
This class is not intended to be instantiated by clients.

Field Summary
static int ANCESTOR
          Three-way change constant indicating the same change in both right and left, that is only the ancestor is different.
protected  int ancestorLength
           
protected  int ancestorStart
           
static int CHANGE
          Two-way change constant indicating two-way change (same as RIGHT)
static int CONFLICT
          Three-way change constant indicating a change in both right and left.
static int ERROR
          Constant indicating an unknown change kind.
protected  int kind
          the kind of change: NOCHANGE, CHANGE, LEFT, RIGHT, ANCESTOR, CONFLICT, ERROR
static int LEFT
          Three-way change constant indicating a change in left.
protected  int leftLength
           
protected  int leftStart
           
static int NOCHANGE
          Two-way change constant indicating no change.
static int RIGHT
          Three-way change constant indicating a change in right.
protected  int rightLength
           
protected  int rightStart
           
 
Constructor Summary
protected RangeDifference (int changeKind)
          Creates a new range difference with the given change kind.
protected RangeDifference (int kind, int rightStart, int rightLength, int leftStart, int leftLength)
          Creates a new RangeDifference with the given change kind and left and right ranges.
protected RangeDifference (int kind, int rightStart, int rightLength, int leftStart, int leftLength, int ancestorStart, int ancestorLength)
          Creates a new RangeDifference with the given change kind and left, right, and ancestor ranges.
 
Method Summary
 int ancestorEnd ()
          Returns the end index of the entity range on the ancestor side.
 int ancestorLength ()
          Returns the number of entities on the ancestor side.
 int ancestorStart ()
          Returns the start index of the entity range on the ancestor side.
 boolean equals ( Object obj)
           
 int kind ()
          Returns the kind of difference.
 int leftEnd ()
          Returns the end index of the entity range on the left side.
 int leftLength ()
          Returns the number of entities on the left side.
 int leftStart ()
          Returns the start index of the entity range on the left side.
 int maxLength ()
          Returns the maximum number of entities in the left, right, and ancestor sides of this range.
 int rightEnd ()
          Returns the end index of the entity range on the right side.
 int rightLength ()
          Returns the number of entities on the right side.
 int rightStart ()
          Returns the start index of the entity range on the right side.
  String toString ()
           
 
Methods inherited from class java.lang. Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

NOCHANGE

public static final int NOCHANGE
Two-way change constant indicating no change.

See Also:
Constant Field Values

CHANGE

public static final int CHANGE
Two-way change constant indicating two-way change (same as RIGHT)

See Also:
Constant Field Values

CONFLICT

public static final int CONFLICT
Three-way change constant indicating a change in both right and left.

See Also:
Constant Field Values

RIGHT

public static final int RIGHT
Three-way change constant indicating a change in right.

See Also:
Constant Field Values

LEFT

public static final int LEFT
Three-way change constant indicating a change in left.

See Also:
Constant Field Values

ANCESTOR

public static final int ANCESTOR
Three-way change constant indicating the same change in both right and left, that is only the ancestor is different.

See Also:
Constant Field Values

ERROR

public static final int ERROR
Constant indicating an unknown change kind.

See Also:
Constant Field Values

kind

protected int kind
the kind of change: NOCHANGE, CHANGE, LEFT, RIGHT, ANCESTOR, CONFLICT, ERROR

Since:
org.eclipse.compare.core 3.5

leftStart

protected int leftStart
Since:
org.eclipse.compare.core 3.5

leftLength

protected int leftLength
Since:
org.eclipse.compare.core 3.5

rightStart

protected int rightStart
Since:
org.eclipse.compare.core 3.5

rightLength

protected int rightLength
Since:
org.eclipse.compare.core 3.5

ancestorStart

protected int ancestorStart
Since:
org.eclipse.compare.core 3.5

ancestorLength

protected int ancestorLength
Since:
org.eclipse.compare.core 3.5
Constructor Detail

RangeDifference

protected RangeDifference(int changeKind)
Creates a new range difference with the given change kind.

Parameters:
changeKind - the kind of change
Since:
org.eclipse.compare.core 3.5

RangeDifference

protected RangeDifference(int kind,
                          int rightStart,
                          int rightLength,
                          int leftStart,
                          int leftLength)
Creates a new RangeDifference with the given change kind and left and right ranges.

Parameters:
kind - the kind of change
rightStart - start index of entity on right side
rightLength - number of entities on right side
leftStart - start index of entity on left side
leftLength - number of entities on left side
Since:
org.eclipse.compare.core 3.5

RangeDifference

protected RangeDifference(int kind,
                          int rightStart,
                          int rightLength,
                          int leftStart,
                          int leftLength,
                          int ancestorStart,
                          int ancestorLength)
Creates a new RangeDifference with the given change kind and left, right, and ancestor ranges.

Parameters:
kind - the kind of change
rightStart - start index of entity on right side
rightLength - number of entities on right side
leftStart - start index of entity on left side
leftLength - number of entities on left side
ancestorStart - start index of entity on ancestor side
ancestorLength - number of entities on ancestor side
Since:
org.eclipse.compare.core 3.5
Method Detail

kind

public int kind()
Returns the kind of difference.

Returns:
the kind of difference, one of NOCHANGE, CHANGE, LEFT, RIGHT, ANCESTOR, CONFLICT, ERROR

ancestorStart

public int ancestorStart()
Returns the start index of the entity range on the ancestor side.

Returns:
the start index of the entity range on the ancestor side

ancestorLength

public int ancestorLength()
Returns the number of entities on the ancestor side.

Returns:
the number of entities on the ancestor side

ancestorEnd

public int ancestorEnd()
Returns the end index of the entity range on the ancestor side.

Returns:
the end index of the entity range on the ancestor side

rightStart

public int rightStart()
Returns the start index of the entity range on the right side.

Returns:
the start index of the entity range on the right side

rightLength

public int rightLength()
Returns the number of entities on the right side.

Returns:
the number of entities on the right side

rightEnd

public int rightEnd()
Returns the end index of the entity range on the right side.

Returns:
the end index of the entity range on the right side

leftStart

public int leftStart()
Returns the start index of the entity range on the left side.

Returns:
the start index of the entity range on the left side

leftLength

public int leftLength()
Returns the number of entities on the left side.

Returns:
the number of entities on the left side

leftEnd

public int leftEnd()
Returns the end index of the entity range on the left side.

Returns:
the end index of the entity range on the left side

maxLength

public int maxLength()
Returns the maximum number of entities in the left, right, and ancestor sides of this range.

Returns:
the maximum number of entities in the left, right, and ancestor sides of this range

equals

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

toString

public 
String toString()
Overrides:
toString in class Object
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