1 files changed, 0 insertions, 259 deletions
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/IncludedInResolver.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/IncludedInResolver.java
deleted file mode 100644
index 658c91c818..0000000000
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/IncludedInResolver.java
+++ /dev/null
@@ -1,259 +0,0 @@
-// Copyright (C) 2013 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package com.google.gerrit.server.change;
-
-import com.google.common.collect.LinkedListMultimap;
-import com.google.common.collect.ListMultimap;
-import com.google.common.collect.Lists;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Set;
-import org.eclipse.jgit.errors.IncorrectObjectTypeException;
-import org.eclipse.jgit.errors.MissingObjectException;
-import org.eclipse.jgit.lib.Constants;
-import org.eclipse.jgit.lib.Ref;
-import org.eclipse.jgit.lib.RefDatabase;
-import org.eclipse.jgit.lib.Repository;
-import org.eclipse.jgit.revwalk.RevCommit;
-import org.eclipse.jgit.revwalk.RevFlag;
-import org.eclipse.jgit.revwalk.RevWalk;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/** Resolve in which tags and branches a commit is included. */
-public class IncludedInResolver {
-
-  private static final Logger log = LoggerFactory.getLogger(IncludedInResolver.class);
-
-  public static Result resolve(Repository repo, RevWalk rw, RevCommit commit) throws IOException {
-    RevFlag flag = newFlag(rw);
-    try {
-      return new IncludedInResolver(repo, rw, commit, flag).resolve();
-    } finally {
-      rw.disposeFlag(flag);
-    }
-  }
-
-  public static boolean includedInAny(
-      final Repository repo, RevWalk rw, RevCommit commit, Collection<Ref> refs)
-      throws IOException {
-    if (refs.isEmpty()) {
-      return false;
-    }
-    RevFlag flag = newFlag(rw);
-    try {
-      return new IncludedInResolver(repo, rw, commit, flag).includedInOne(refs);
-    } finally {
-      rw.disposeFlag(flag);
-    }
-  }
-
-  private static RevFlag newFlag(RevWalk rw) {
-    return rw.newFlag("CONTAINS_TARGET");
-  }
-
-  private final Repository repo;
-  private final RevWalk rw;
-  private final RevCommit target;
-
-  private final RevFlag containsTarget;
-  private ListMultimap<RevCommit, String> commitToRef;
-  private List<RevCommit> tipsByCommitTime;
-
-  private IncludedInResolver(
-      Repository repo, RevWalk rw, RevCommit target, RevFlag containsTarget) {
-    this.repo = repo;
-    this.rw = rw;
-    this.target = target;
-    this.containsTarget = containsTarget;
-  }
-
-  private Result resolve() throws IOException {
-    RefDatabase refDb = repo.getRefDatabase();
-    Collection<Ref> tags = refDb.getRefs(Constants.R_TAGS).values();
-    Collection<Ref> branches = refDb.getRefs(Constants.R_HEADS).values();
-    List<Ref> allTagsAndBranches = Lists.newArrayListWithCapacity(tags.size() + branches.size());
-    allTagsAndBranches.addAll(tags);
-    allTagsAndBranches.addAll(branches);
-    parseCommits(allTagsAndBranches);
-    Set<String> allMatchingTagsAndBranches = includedIn(tipsByCommitTime, 0);
-
-    Result detail = new Result();
-    detail.setBranches(getMatchingRefNames(allMatchingTagsAndBranches, branches));
-    detail.setTags(getMatchingRefNames(allMatchingTagsAndBranches, tags));
-
-    return detail;
-  }
-
-  private boolean includedInOne(Collection<Ref> refs) throws IOException {
-    parseCommits(refs);
-    List<RevCommit> before = new ArrayList<>();
-    List<RevCommit> after = new ArrayList<>();
-    partition(before, after);
-    rw.reset();
-    // It is highly likely that the target is reachable from the "after" set
-    // Within the "before" set we are trying to handle cases arising from clock skew
-    return !includedIn(after, 1).isEmpty() || !includedIn(before, 1).isEmpty();
-  }
-
-  /** Resolves which tip refs include the target commit. */
-  private Set<String> includedIn(Collection<RevCommit> tips, int limit)
-      throws IOException, MissingObjectException, IncorrectObjectTypeException {
-    Set<String> result = new HashSet<>();
-    for (RevCommit tip : tips) {
-      boolean commitFound = false;
-      rw.resetRetain(RevFlag.UNINTERESTING, containsTarget);
-      rw.markStart(tip);
-      for (RevCommit commit : rw) {
-        if (commit.equals(target) || commit.has(containsTarget)) {
-          commitFound = true;
-          tip.add(containsTarget);
-          result.addAll(commitToRef.get(tip));
-          break;
-        }
-      }
-      if (!commitFound) {
-        rw.markUninteresting(tip);
-      } else if (0 < limit && limit < result.size()) {
-        break;
-      }
-    }
-    return result;
-  }
-
-  /**
-   * Partition the reference tips into two sets:
-   *
-   * <ul>
-   *   <li>before = commits with time < target.getCommitTime()
-   *   <li>after = commits with time >= target.getCommitTime()
-   * </ul>
-   *
-   * Each of the before/after lists is sorted by the commit time.
-   *
-   * @param before
-   * @param after
-   */
-  private void partition(List<RevCommit> before, List<RevCommit> after) {
-    int insertionPoint =
-        Collections.binarySearch(
-            tipsByCommitTime,
-            target,
-            new Comparator<RevCommit>() {
-              @Override
-              public int compare(RevCommit c1, RevCommit c2) {
-                return c1.getCommitTime() - c2.getCommitTime();
-              }
-            });
-    if (insertionPoint < 0) {
-      insertionPoint = -(insertionPoint + 1);
-    }
-    if (0 < insertionPoint) {
-      before.addAll(tipsByCommitTime.subList(0, insertionPoint));
-    }
-    if (insertionPoint < tipsByCommitTime.size()) {
-      after.addAll(tipsByCommitTime.subList(insertionPoint, tipsByCommitTime.size()));
-    }
-  }
-
-  /**
-   * Returns the short names of refs which are as well in the matchingRefs list as well as in the
-   * allRef list.
-   */
-  private static List<String> getMatchingRefNames(
-      Set<String> matchingRefs, Collection<Ref> allRefs) {
-    List<String> refNames = Lists.newArrayListWithCapacity(matchingRefs.size());
-    for (Ref r : allRefs) {
-      if (matchingRefs.contains(r.getName())) {
-        refNames.add(Repository.shortenRefName(r.getName()));
-      }
-    }
-    return refNames;
-  }
-
-  /** Parse commit of ref and store the relation between ref and commit. */
-  private void parseCommits(Collection<Ref> refs) throws IOException {
-    if (commitToRef != null) {
-      return;
-    }
-    commitToRef = LinkedListMultimap.create();
-    for (Ref ref : refs) {
-      final RevCommit commit;
-      try {
-        commit = rw.parseCommit(ref.getObjectId());
-      } catch (IncorrectObjectTypeException notCommit) {
-        // Its OK for a tag reference to point to a blob or a tree, this
-        // is common in the Linux kernel or git.git repository.
-        //
-        continue;
-      } catch (MissingObjectException notHere) {
-        // Log the problem with this branch, but keep processing.
-        //
-        log.warn(
-            "Reference "
-                + ref.getName()
-                + " in "
-                + repo.getDirectory()
-                + " points to dangling object "
-                + ref.getObjectId());
-        continue;
-      }
-      commitToRef.put(commit, ref.getName());
-    }
-    tipsByCommitTime = Lists.newArrayList(commitToRef.keySet());
-    sortOlderFirst(tipsByCommitTime);
-  }
-
-  private void sortOlderFirst(List<RevCommit> tips) {
-    Collections.sort(
-        tips,
-        new Comparator<RevCommit>() {
-          @Override
-          public int compare(RevCommit c1, RevCommit c2) {
-            return c1.getCommitTime() - c2.getCommitTime();
-          }
-        });
-  }
-
-  public static class Result {
-    private List<String> branches;
-    private List<String> tags;
-
-    public Result() {}
-
-    public void setBranches(List<String> b) {
-      Collections.sort(b);
-      branches = b;
-    }
-
-    public List<String> getBranches() {
-      return branches;
-    }
-
-    public void setTags(List<String> t) {
-      Collections.sort(t);
-      tags = t;
-    }
-
-    public List<String> getTags() {
-      return tags;
-    }
-  }
-}