| /* |
| * (c) Copyright IBM Corp. 2000, 2001. |
| * All Rights Reserved. |
| */ |
| package org.eclipse.compare.rangedifferencer; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * A custom iterator to iterate over a List of <code>RangeDifferences</code>. |
| * It is used internally by the <code>RangeDifferencer</code>. |
| */ |
| /* package */ class DifferencesIterator { |
| |
| List fRange; |
| int fIndex; |
| RangeDifference[] fArray; |
| RangeDifference fDifference; |
| |
| /** |
| * Creates a differences iterator on an array of <code>RangeDifference</code>s. |
| */ |
| DifferencesIterator(RangeDifference[] differenceRanges) { |
| |
| fArray= differenceRanges; |
| fIndex= 0; |
| fRange= new ArrayList(); |
| if (fIndex < fArray.length) |
| fDifference= fArray[fIndex++]; |
| else |
| fDifference= null; |
| } |
| |
| /** |
| * Returns the number of RangeDifferences |
| */ |
| int getCount() { |
| return fRange.size(); |
| } |
| |
| /** |
| * Appends the edit to its list and moves to the next <code>RangeDifference</code>. |
| */ |
| void next() { |
| fRange.add(fDifference); |
| if (fDifference != null) { |
| if (fIndex < fArray.length) |
| fDifference= fArray[fIndex++]; |
| else |
| fDifference= null; |
| } |
| } |
| |
| /** |
| * Difference iterators are used in pairs. |
| * This method returns the other iterator. |
| */ |
| DifferencesIterator other(DifferencesIterator right, DifferencesIterator left) { |
| if (this == right) |
| return left; |
| return right; |
| } |
| |
| /** |
| * Removes all <code>RangeDifference</code>s |
| */ |
| void removeAll() { |
| fRange.clear(); |
| } |
| } |