/*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2003 The Apache Software Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowledgement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgement may appear in the software itself,
* if and wherever such third-party acknowledgements normally appear.
*
* 4. The names "The Jakarta Project", "Commons", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
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* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
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*
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
*
*/
/**
* Implements a differencing engine that works on arrays of {@link Object Object}.
*
* <p>Within this library, the word <i>text</i> means a unit of information
* subject to version control.
*
* <p>Text is represented as <code>Object[]</code> because
* the diff engine is capable of handling more than plain ascci. In fact,
* arrays of any type that implements
* {@link java.lang.Object#hashCode hashCode()} and
* {@link java.lang.Object#equals equals()}
* correctly can be subject to differencing using this
* library.</p>
*
* <p>This library provides a framework in which different differencing
* algorithms may be used. If no algorithm is specififed, a default
* algorithm is used.</p>
*
* @version $Revision: 1.16 $ $Date: 2003/10/13 08:00:24 $
* @author <a href="mailto:juanco@suigeneris.org">Juanco Anez</a>
* @see Delta
* @see DiffAlgorithm
*
* modifications:
*
* 27 Apr 2003 bwm
*
* Added some comments whilst trying to figure out the algorithm
*
* 03 May 2003 bwm
*
* Factored out the algorithm implementation into a separate difference
* algorithm class to allow pluggable algorithms.
*/
public class Diff
extends ToString
{
/** The standard line separator. */
/** The line separator to use in RCS format output. */
/** The original sequence. */
/** The differencing algorithm to use. */
/**
* Create a differencing object using the default algorithm
*
* @param original the original text that will be compared
*/
{
}
/**
* Create a differencing object using the given algorithm
*
* @param original the original text which will be compared against
* @param algorithm the difference algorithm to use.
*/
{
{
throw new IllegalArgumentException();
}
else
this.algorithm = defaultAlgorithm();
}
{
return new MyersDiff();
}
/**
* compute the difference between an original and a revision.
*
* @param orig the original
* @param rev the revision to compare with the original.
* @return a Revision describing the differences
* @throws DifferentiationFailedException
*/
{
{
throw new IllegalArgumentException();
}
}
/**
* compute the difference between an original and a revision.
*
* @param orig the original
* @param rev the revision to compare with the original.
* @param algorithm the difference algorithm to use
* @return a Revision describing the differences
* @throws DifferentiationFailedException
*/
{
{
throw new IllegalArgumentException();
}
}
/**
* compute the difference between the original and a revision.
*
* @param rev the revision to compare with the original.
* @return a Revision describing the differences
* @throws DifferentiationFailedException
*/
{
return new Revision();
}
/**
* Compares the two input sequences.
* @param orig The original sequence.
* @param rev The revised sequence.
* @return true if the sequences are identical. False otherwise.
*/
{
{
return false;
}
{
{
return false;
}
}
return true;
}
/**
* Converts an array of {@link Object Object} to a string
* using {@link Diff#NL Diff.NL}
* as the line separator.
* @param o the array of objects.
* @return a string
*/
{
}
/**
* Edits all of the items in the input sequence.
* @param text The input sequence.
* @return A sequence of the same length with all the lines
* differing from the corresponding ones in the input.
*/
{
return result;
}
/**
* Performs random edits on the input sequence. Useful for testing.
* @param text The input sequence.
* @return The sequence with random edits performed.
*/
{
}
/**
* Performs random edits on the input sequence. Useful for testing.
* @param text The input sequence.
* @param seed A seed value for the randomizer.
* @return The sequence with random edits performed.
*/
{
for (int i = 0; i < nops; i++)
{
boolean del = r.nextBoolean();
{ // delete
}
else
{
{
"[" + i + "] random edit[" + i + "][" + i + "]");
}
}
}
}
/**
* Shuffles around the items in the input sequence.
* @param text The input sequence.
* @return The shuffled sequence.
*/
{
}
/**
* Shuffles around the items in the input sequence.
* @param text The input sequence.
* @param seed A seed value for randomizing the suffle.
* @return The shuffled sequence.
*/
{
}
/**
* Generate a random sequence of the given size.
* @param size The size of the sequence to generate.
* @return The generated sequence.
*/
{
}
/**
* Generate a random sequence of the given size.
* @param size The size of the sequence to generate.
* @param seed A seed value for randomizing the generation.
* @return The generated sequence.
*/
{
{
}
return result;
}
}