/*
* 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.scanner.issue.tracking;
import com.google.common.collect.LinkedHashMultimap;
import com.google.common.collect.Multimap;
import java.util.Collection;
import org.apache.commons.codec.binary.Hex;
import org.apache.commons.lang.ObjectUtils;
import org.sonar.api.batch.fs.InputFile;
import org.sonar.api.batch.fs.internal.FileMetadata;
/**
* Wraps a {@link Sequence} to assign hash codes to elements.
*/
public final class FileHashes {
private final String[] hashes;
private final Multimap<String, Integer> linesByHash;
private FileHashes(String[] hashes, Multimap<String, Integer> linesByHash) {
this.hashes = hashes;
this.linesByHash = linesByHash;
}
public static FileHashes create(String[] hashes) {
int size = hashes.length;
Multimap<String, Integer> linesByHash = LinkedHashMultimap.create();
for (int i = 0; i < size; i++) {
// indices in array are shifted one line before
linesByHash.put(hashes[i], i + 1);
}
return new FileHashes(hashes, linesByHash);
}
public static FileHashes create(InputFile f) {
final byte[][] hashes = new byte[f.lines()][];
FileMetadata.computeLineHashesForIssueTracking(f,
(lineIdx, hash) -> hashes[lineIdx - 1] = hash);
int size = hashes.length;
Multimap<String, Integer> linesByHash = LinkedHashMultimap.create();
String[] hexHashes = new String[size];
for (int i = 0; i < size; i++) {
String hash = hashes[i] != null ? Hex.encodeHexString(hashes[i]) : "";
hexHashes[i] = hash;
// indices in array are shifted one line before
linesByHash.put(hash, i + 1);
}
return new FileHashes(hexHashes, linesByHash);
}
public int length() {
return hashes.length;
}
public Collection<Integer> getLinesForHash(String hash) {
return linesByHash.get(hash);
}
public String[] hashes() {
return hashes;
}
public String getHash(int line) {
// indices in array are shifted one line before
return (String) ObjectUtils.defaultIfNull(hashes[line - 1], "");
}
}