net.sourceforge.xwing.util
Class SequenceUtils

java.lang.Object
  net.sourceforge.xwing.util.SequenceUtils

public class SequenceUtils

extends Object

A utility class that reports simple difference information between two sequences.

Version:

$Revision: 1.2 $

Author:

Scott Howlett

Nested Class Summary

static class

SequenceUtils.ChangeInfo A class that encapsulates the information about the change from an old sequence to a new sequence.

Field Summary

static int	COMPLEX_CHANGE The new sequence and the old sequence differ by some change that is more complex than a single insert or remove.
static int	INTERVAL_ADDED The new sequence differs from the old sequence by having a set of values inserted into it at a single point.
static int	INTERVAL_REMOVED The new sequence differs from the old sequence by having a set of values removed from it at a single point.
static int	NO_CHANGE The two sequences are the same.

Method Summary

static SequenceUtils.ChangeInfo	findDifference(Collection oldData, Collection newData) Report on the difference betwen two Collections.
static SequenceUtils.ChangeInfo	findDifference(Object[] oldData, Object[] newData) Report on the difference betwen two Arrays.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NO_CHANGE

public static final int NO_CHANGE

The two sequences are the same.

See Also:

Constant Field Values

INTERVAL_ADDED

public static final int INTERVAL_ADDED

The new sequence differs from the old sequence by having a set of values inserted into it at a single point.

See Also:

Constant Field Values

INTERVAL_REMOVED

public static final int INTERVAL_REMOVED

The new sequence differs from the old sequence by having a set of values removed from it at a single point.

See Also:

Constant Field Values

COMPLEX_CHANGE

public static final int COMPLEX_CHANGE

The new sequence and the old sequence differ by some change that is more complex than a single insert or remove.

See Also:

Constant Field Values

Method Detail

findDifference

public static SequenceUtils.ChangeInfo findDifference(Collection oldData,
                                                      Collection newData)

Report on the difference betwen two Collections.

Parameters:

oldData - The old sequence.

newData - The new sequence.

Returns:

A ChangeInfo describing the change.

findDifference

public static SequenceUtils.ChangeInfo findDifference(Object[] oldData,
                                                      Object[] newData)

Report on the difference betwen two Arrays.

Parameters:

oldData - The old sequence.

newData - The new sequence.

Returns:

A ChangeInfo describing the change.