| /******************************************************************************* |
| * Copyright (c) 2000, 2011 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| 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) { |
| |
| this.fArray= differenceRanges; |
| this.fIndex= 0; |
| this.fRange= new ArrayList(); |
| if (this.fIndex < this.fArray.length) |
| this.fDifference= this.fArray[this.fIndex++]; |
| else |
| this.fDifference= null; |
| } |
| |
| /* |
| * Returns the number of RangeDifferences |
| */ |
| int getCount() { |
| return this.fRange.size(); |
| } |
| |
| /* |
| * Appends the edit to its list and moves to the next <code>RangeDifference</code>. |
| */ |
| void next() { |
| this.fRange.add(this.fDifference); |
| if (this.fDifference != null) { |
| if (this.fIndex < this.fArray.length) |
| this.fDifference= this.fArray[this.fIndex++]; |
| else |
| this.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() { |
| this.fRange.clear(); |
| } |
| } |