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/*******************************************************************************
* Copyright (c) 2000, 2011 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* 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<RangeDifference> 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();
}
}
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