Examples of org.eclipse.jgit.lib.Ref

org.eclipse.jgit.lib.Ref
Pairing of a name and the {@link ObjectId} it currently has.
A ref in Git is (more or less) a variable that holds a single object identifier. The object identifier can be any valid Git object (blob, tree, commit, annotated tag, ...).
The ref name has the attributes of the ref that was asked for as well as the ref it was resolved to for symbolic refs plus the object id it points to and (for tags) the peeled target object id, i.e. the tag resolved recursively until a non-tag object is referenced.

   * @throws RefNotFoundException
   * @throws IOException
   */
  public RevCommit tryFastForward(RevCommit newCommit)
      throws RefNotFoundException, IOException {
    Ref head = repo.getRef(Constants.HEAD);
    if (head == null || head.getObjectId() == null)
      throw new RefNotFoundException(MessageFormat.format(
          JGitText.get().refNotResolved, Constants.HEAD));


    ObjectId headId = head.getObjectId();
    if (headId == null)
      throw new RefNotFoundException(MessageFormat.format(
          JGitText.get().refNotResolved, Constants.HEAD));
    RevCommit headCommit = walk.lookupCommit(headId);
    if (walk.isMergedInto(newCommit, headCommit))
      return newCommit;


    String headName;
    if (head.isSymbolic())
      headName = head.getTarget().getName();
    else
      headName = "detached HEAD";
    return tryFastForward(headName, headCommit, newCommit);
  }

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  }


  @Override
  public Ref get(Object key) {
    String name = toRefName((String) key);
    Ref ref = resolved.get(name);
    if (ref == null)
      ref = loose.get(name);
    if (ref == null)
      ref = packed.get(name);
    return ref;

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      resolved = RefList.emptyList();
    }


    int idx = loose.find(name);
    if (0 <= idx) {
      Ref prior = loose.get(name);
      loose = loose.set(idx, value);
      return prior;
    } else {
      Ref prior = get(keyName);
      loose = loose.add(idx, value);
      sizeIsValid = false;
      return prior;
    }
  }

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  }


  @Override
  public Ref remove(Object key) {
    String name = toRefName((String) key);
    Ref res = null;
    int idx;
    if (0 <= (idx = packed.find(name))) {
      res = packed.get(name);
      packed = packed.remove(idx);
      sizeIsValid = false;

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      throw new NoSuchElementException();
    }


    public Entry<String, Ref> peek() {
      if (packedIdx < packed.size() && looseIdx < loose.size()) {
        Ref p = packed.get(packedIdx);
        Ref l = loose.get(looseIdx);
        int cmp = RefComparator.compareTo(p, l);
        if (cmp < 0) {
          packedIdx++;
          return toEntry(p);
        }

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      return null;
    }


    private Ref resolveLoose(final Ref l) {
      if (resolvedIdx < resolved.size()) {
        Ref r = resolved.get(resolvedIdx);
        int cmp = RefComparator.compareTo(l, r);
        if (cmp == 0) {
          resolvedIdx++;
          return r;
        } else if (cmp > 0) {

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    public Ref getValue() {
      return ref;
    }


    public Ref setValue(Ref value) {
      Ref prior = put(getKey(), value);
      ref = value;
      return prior;
    }

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    public boolean equals(Object obj) {
      if (obj instanceof Map.Entry) {
        final Object key = ((Map.Entry) obj).getKey();
        final Object val = ((Map.Entry) obj).getValue();
        if (key instanceof String && val instanceof Ref) {
          final Ref r = (Ref) val;
          if (r.getName().equals(ref.getName())) {
            final ObjectId a = r.getObjectId();
            final ObjectId b = ref.getObjectId();
            if (a != null && b != null && AnyObjectId.equals(a, b))
              return true;
          }
        }

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      avail.put(r.getObjectId(), r);


    final Collection<Ref> wants = new ArrayList<Ref>(askFor.values());
    askFor.clear();
    for (final Ref want : wants) {
      final Ref newRef = avail.get(want.getObjectId());
      if (newRef != null) {
        askFor.put(newRef.getObjectId(), newRef);
      } else {
        removeFetchHeadRecord(want.getObjectId());
        removeTrackingRefUpdate(want.getObjectId());
      }
    }

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    }
  }


  private void expandSingle(final RefSpec spec, final Set<Ref> matched)
      throws TransportException {
    final Ref src = conn.getRef(spec.getSource());
    if (src == null) {
      throw new TransportException(MessageFormat.format(JGitText.get().remoteDoesNotHaveSpec, spec.getSource()));
    }
    if (matched.add(src))
      want(src, spec);

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