/**
* Creates internal hive format version info.
*
* @throws IOException
*/
private void createVersionInfo() throws IOException {
final byte[] bytes = CURRENTVERSION.getBytes();
final Tree root = new Tree(repository);
FileTreeEntry versionFile = root.addFile(VERSION_PATH);
versionFile.setId(writeBytes(bytes));
Commit commit = commitTree(root);
updateHead(commit);
}
public Version put(final String key, final byte[] data, final List<Version> parents) {
try {
Tree root = getLatestRoot();
for (Version parent : parents) {
VersionImpl version = (VersionImpl) parent;
TreeEntry treeMember = root.findBlobMember(version.getEntry().getFullName());
if (treeMember != null) {
treeMember.delete();
}
}
VersionImpl version = updateTree(root, key, data);
return version;
} catch (Exception e) {
throw new SwarmdbException("Unable to update key: " + key, e);
}
}
public List<Version> get(final String key) {
ArrayList<Version> result = new ArrayList<Version>();
try {
Commit commit = getLastCommit();
Tree root = commit.getTree();
TreeEntry subTreeEntry = root.findTreeMember(key);
if (subTreeEntry instanceof Tree) {
Tree subTree = (Tree) subTreeEntry;
for (TreeEntry entry : subTree.members()) {
if (entry instanceof FileTreeEntry) {
result.add(new VersionImpl(commit, key, (FileTreeEntry) entry));
}
}
}
} catch (Exception e) {
throw new SwarmdbException("Unable to update key: " + key, e);
}
return result;
}
private VersionImpl updateTree(final Tree root, final String key, final byte[] data)
throws IOException {
ObjectId objectId = writeBytes(data);
FileTreeEntry fileTreeEntry = root.addFile(key + "/" + objectId.name());
fileTreeEntry.setId(objectId);
Commit commit = commitTree(root);
updateHead(commit);
VersionImpl version = new VersionImpl(commit, key, fileTreeEntry);
return version;
}