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MatchesByScore.java
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MatchesByScore.java
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/*
* SonarQube
* Copyright (C) 2009-2016 SonarSource SA
* mailto:contact AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.server.computation.filemove;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import static org.sonar.server.computation.filemove.FileMoveDetectionStep.MIN_REQUIRED_SCORE;
abstract class MatchesByScore implements Iterable<List<Match>> {
public static MatchesByScore create(ScoreMatrix scoreMatrix) {
if (scoreMatrix.getMaxScore() < MIN_REQUIRED_SCORE) {
return EmptyMatchesByScore.INSTANCE;
}
MatchesByScoreImpl res = new MatchesByScoreImpl(scoreMatrix);
res.populate();
return res;
}
public abstract int getSize();
private static final class MatchesByScoreImpl extends MatchesByScore implements ScoreMatrix.ScoreMatrixVisitor {
private final ScoreMatrix scoreMatrix;
private final List<Match>[] matches;
private int totalMatches = 0;
private MatchesByScoreImpl(ScoreMatrix scoreMatrix) {
this.scoreMatrix = scoreMatrix;
this.matches = new List[scoreMatrix.getMaxScore() - MIN_REQUIRED_SCORE + 1];
}
private void populate() {
scoreMatrix.accept(this);
}
@Override
public void visit(String dbFileKey, String reportFileKey, int score) {
if (!isAcceptableScore(score)) {
return;
}
int index = score - MIN_REQUIRED_SCORE;
if (matches[index] == null) {
matches[index] = new ArrayList<>(1);
}
Match match = new Match(dbFileKey, reportFileKey);
matches[index].add(match);
totalMatches++;
}
private static boolean isAcceptableScore(int score) {
return score >= MIN_REQUIRED_SCORE;
}
@Override
public int getSize() {
return totalMatches;
}
@Override
public Iterator<List<Match>> iterator() {
return Arrays.asList(matches).iterator();
}
}
private static class EmptyMatchesByScore extends MatchesByScore {
private static final EmptyMatchesByScore INSTANCE = new EmptyMatchesByScore();
@Override
public int getSize() {
return 0;
}
@Override
public Iterator<List<Match>> iterator() {
return Collections.<List<Match>>emptyList().iterator();
}
}
}