/*
* SonarQube
* Copyright (C) 2009-2017 SonarSource SA
* mailto:info 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.core.issue.tracking;
import com.google.common.collect.SetMultimap;
import com.google.common.collect.HashMultimap;
import com.google.common.base.Strings;
import java.util.List;
import java.util.Set;
import org.sonar.core.hash.SourceLinesHashesComputer;
/**
* Sequence of hash of lines for a given file
*/
public class LineHashSequence {
/**
* Hashes of lines. Line 1 is at index 0. No null elements.
*/
private final List<String> hashes;
private final SetMultimap<String, Integer> lineByHash;
public LineHashSequence(List<String> hashes) {
this.hashes = hashes;
this.lineByHash = HashMultimap.create();
int lineNo = 1;
for (String hash : hashes) {
lineByHash.put(hash, lineNo);
lineNo++;
}
}
/**
* Number of lines
*/
public int length() {
return hashes.size();
}
/**
* Checks if the line, starting with 1, is defined.
*/
public boolean hasLine(int line) {
return 0 < line && line <= hashes.size();
}
/**
* The lines, starting with 1, that matches the given hash.
*/
public Set<Integer> getLinesForHash(String hash) {
return lineByHash.get(hash);
}
/**
* Hash of the given line, which starts with 1. Return empty string
* is the line does not exist.
*/
public String getHashForLine(int line) {
if (line > 0 && line <= hashes.size()) {
return Strings.nullToEmpty(hashes.get(line - 1));
}
return "";
}
List<String> getHashes() {
return hashes;
}
public static LineHashSequence createForLines(List<String> lines) {
SourceLinesHashesComputer hashesComputer = new SourceLinesHashesComputer(lines.size());
for (String line : lines) {
hashesComputer.addLine(line);
}
return new LineHashSequence(hashesComputer.getLineHashes());
}
}