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How to use diff method of org.assertj.core.util.diff.myers.MyersDiff class

Best Assertj code snippet using org.assertj.core.util.diff.myers.MyersDiff.diff

Source:MyersDiff.java

...9 * specific language governing permissions and limitations under the License.10 *11 * Copyright 2012-2015 the original author or authors.12 */13package org.assertj.core.util.diff.myers;14import java.util.ArrayList;15import java.util.Arrays;16import java.util.List;17import org.assertj.core.util.diff.ChangeDelta;18import org.assertj.core.util.diff.Chunk;19import org.assertj.core.util.diff.DeleteDelta;20import org.assertj.core.util.diff.Delta;21import org.assertj.core.util.diff.DiffAlgorithm;22import org.assertj.core.util.diff.InsertDelta;23import org.assertj.core.util.diff.Patch;24/**25 * Copy from https://code.google.com/p/java-diff-utils/.26 * <p>27 * A clean-room implementation of <a href="http://www.cs.arizona.edu/people/gene/">28 * Eugene Myers</a> differencing algorithm.29 *30 * <p> See the paper at <a href="http://www.cs.arizona.edu/people/gene/PAPERS/diff.ps">31 * http://www.cs.arizona.edu/people/gene/PAPERS/diff.ps</a></p>32 *33 * @author <a href="mailto:juanco@suigeneris.org">Juanco Anez</a>34 * @param <T> The type of the compared elements in the 'lines'.35 */36public class MyersDiff<T> implements DiffAlgorithm<T> {37  /** The equalizer. */38  private final Equalizer<T> equalizer;39  /**40   * Constructs an instance of the Myers differencing algorithm.41   */42  public MyersDiff() {43    /**	Default equalizer. */44    equalizer = new Equalizer<T>() {45      @Override46      public boolean equals(T original, T revised) {47        return original.equals(revised);48      }49    };50  }51  /**52   * Constructs an instance of the Myers differencing algorithm.53   * @param equalizer Must not be {@code null}.54   */55  public MyersDiff(final Equalizer<T> equalizer) {56    if (equalizer == null) {57      throw new IllegalArgumentException("equalizer must not be null");58    }59    this.equalizer = equalizer;60  }61  /**62   * {@inheritDoc}63   *64   * @return Returns an empty diff if get the error while procession the difference.65   */66  public Patch<T> diff(final T[] original, final T[] revised) {67    return diff(Arrays.asList(original), Arrays.asList(revised));68  }69  /**70   * {@inheritDoc}71   *72   * Return empty diff if get the error while procession the difference.73   */74  public Patch<T> diff(final List<T> original, final List<T> revised) {75    if (original == null) {76      throw new IllegalArgumentException("original list must not be null");77    }78    if (revised == null) {79      throw new IllegalArgumentException("revised list must not be null");80    }81    PathNode path;82    try {83      path = buildPath(original, revised);84      return buildRevision(path, original, revised);85    } catch (IllegalStateException e) {86      e.printStackTrace();87      return new Patch<>();88    }89  }90  /**91   * Computes the minimum diffpath that expresses de differences92   * between the original and revised sequences, according93   * to Gene Myers differencing algorithm.94   *95   * @param orig The original sequence.96   * @param rev The revised sequence.97   * @return A minimum {@link PathNode Path} accross the differences graph.98   * @throws DifferentiationFailedException if a diff path could not be found.99   */100  public PathNode buildPath(final List<T> orig, final List<T> rev) {101    if (orig == null)102      throw new IllegalArgumentException("original sequence is null");103    if (rev == null)104      throw new IllegalArgumentException("revised sequence is null");105    // these are local constants106    final int N = orig.size();107    final int M = rev.size();108    final int MAX = N + M + 1;109    final int size = 1 + 2 * MAX;110    final int middle = size / 2;111    final PathNode diagonal[] = new PathNode[size];112    diagonal[middle + 1] = new Snake(0, -1, null);113    for (int d = 0; d < MAX; d++) {114      for (int k = -d; k <= d; k += 2) {115        final int kmiddle = middle + k;116        final int kplus = kmiddle + 1;117        final int kminus = kmiddle - 1;118        PathNode prev;119        int i;120        if ((k == -d) || (k != d && diagonal[kminus].i < diagonal[kplus].i)) {121          i = diagonal[kplus].i;122          prev = diagonal[kplus];123        } else {124          i = diagonal[kminus].i + 1;125          prev = diagonal[kminus];126        }127        diagonal[kminus] = null; // no longer used128        int j = i - k;129        PathNode node = new DiffNode(i, j, prev);130        // orig and rev are zero-based131        // but the algorithm is one-based132        // that's why there's no +1 when indexing the sequences133        while (i < N && j < M && equals(orig.get(i), rev.get(j))) {134          i++;135          j++;136        }137        if (i > node.i) node = new Snake(i, j, node);138        diagonal[kmiddle] = node;139        if (i >= N && j >= M) return diagonal[kmiddle];140      }141      diagonal[middle + d - 1] = null;142    }143    // According to Myers, this cannot happen144    throw new IllegalStateException("could not find a diff path");145  }146  private boolean equals(T orig, T rev) {147    return equalizer.equals(orig, rev);148  }149  /**150   * Constructs a {@link Patch} from a difference path.151   *152   * @param path The path.153   * @param orig The original sequence.154   * @param rev The revised sequence.155   * @return A {@link Patch} script corresponding to the path.156   */157  public Patch<T> buildRevision(PathNode path, List<T> orig, List<T> rev) {158    if (path == null) throw new IllegalArgumentException("path is null");159    if (orig == null) throw new IllegalArgumentException("original sequence is null");160    if (rev == null) throw new IllegalArgumentException("revised sequence is null");161    Patch<T> patch = new Patch<>();162    if (path.isSnake())163      path = path.prev;164    while (path != null && path.prev != null && path.prev.j >= 0) {165      if (path.isSnake())166        throw new IllegalStateException("bad diffpath: found snake when looking for diff");167      int i = path.i;168      int j = path.j;169      path = path.prev;170      int ianchor = path.i;171      int janchor = path.j;172      Chunk<T> original = new Chunk<>(ianchor, copyOfRange(orig, ianchor, i));173      Chunk<T> revised = new Chunk<>(janchor, copyOfRange(rev, janchor, j));174      Delta<T> delta;175      if (original.size() == 0 && revised.size() != 0) {176        delta = new InsertDelta<>(original, revised);177      } else if (original.size() > 0 && revised.size() == 0) {178        delta = new DeleteDelta<>(original, revised);179      } else {180        delta = new ChangeDelta<>(original, revised);...

diff

Using AI Code Generation

1import org.assertj.core.util.diff.myers.MyersDiff;2import org.assertj.core.util.diff.myers.Patch;3import org.assertj.core.util.diff.myers.DeleteDelta;4import org.assertj.core.util.diff.myers.InsertDelta;5import org.assertj.core.util.diff.myers.ChangeDelta;6import org.assertj.core.util.diff.myers.MyersDiff;7import org.assertj.core.util.diff.myers.Patch;8import org.assertj.core.util.diff.myers.DeleteDelta;9import org.assertj.core.util.diff.myers.InsertDelta;10import org.assertj.core.util.diff.myers.ChangeDelta;11public class Diff {12    public static void main(String[] args) {13        String first = "Hello World!";14        String second = "Hello World";15        Patch patch = MyersDiff.INSTANCE.diff(first, second);16        for (Object delta : patch.getDeltas()) {17            if (delta instanceof DeleteDelta) {18                DeleteDelta dd = (DeleteDelta) delta;19                System.out.println("Delete at position " + dd.getOriginal().getPosition() + " length " + dd.getOriginal().getLines().size());20            } else if (delta instanceof InsertDelta) {21                InsertDelta id = (InsertDelta) delta;22                System.out.println("Insert at position " + id.getOriginal().getPosition() + " length " + id.getOriginal().getLines().size());23            } else if (delta instanceof ChangeDelta) {24                ChangeDelta cd = (ChangeDelta) delta;25                System.out.println("Change at position " + cd.getOriginal().getPosition() + " length " + cd.getOriginal().getLines().size());26            }27        }28    }29}

diff

Using AI Code Generation

1    public static <T> List<Delta<T>> diff(List<T> original, List<T> revised) {2        return new MyersDiff<T>(original, revised).getDeltas();3    }4    public static <T> List<Delta<T>> diff(List<T> original, List<T> revised) {5        return new MyersDiff<T>(original, revised).getDeltas();6    }7    public static <T> List<Delta<T>> diff(List<T> original, List<T> revised) {8        return new MyersDiff<T>(original, revised).getDeltas();9    }10    public static <T> List<Delta<T>> diff(List<T> original, List<T> revised) {11        return new MyersDiff<T>(original, revised).getDeltas();12    }13    public static <T> List<Delta<T>> diff(List<T> original, List<T> revised) {14        return new MyersDiff<T>(original, revised).getDeltas();15    }16    public static <T> List<Delta<T>> diff(List<T> original, List<T> revised) {17        return new MyersDiff<T>(original, revised).getDeltas();18    }19    public static <T> List<Delta<T>> diff(List<T> original, List<T> revised) {20        return new MyersDiff<T>(original, revised).getDeltas();21    }22    public static <T> List<Delta<T>> diff(List<T> original, List<T> revised) {23        return new MyersDiff<T>(original, revised).getDeltas();24    }

diff

Using AI Code Generation

1import org.assertj.core.util.diff.myers.MyersDiff;2public class DiffExample {3    public static void main(String[] args) {4z";5-";6        MyersDiff diff = new MyersDiff(original, revised);7        System.out.println(diff);8    }9}

diff

Using AI Code Generation

1import org.assertj.core.util.diff.myers.MyersDiff;2import org.assertj.core.util.diff.myers.Patch;3String s1 = "This is a test";4String s2 = "This is a test with some differences";5MyersDiff myersDiff = new MyersDiff(s1, s2);6Patch patch = myersDiff.diff();7System.out.println(patch);

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