org.eclipse.jgit.lib

Class TreeFormatter

java.lang.Object

org.eclipse.jgit.lib.TreeFormatter

public class TreeFormatter
extends Object

Mutable formatter to construct a single tree object. This formatter does not process subtrees. Callers must handle creating each subtree on their own. To maintain good performance for bulk operations, this formatter does not validate its input. Callers are responsible for ensuring the resulting tree object is correctly well formed by writing entries in the correct order.

Constructor Summary

Constructors

Constructor and Description
TreeFormatter() Create an empty formatter with a default buffer size.
TreeFormatter(int size) Create an empty formatter with the specified buffer size.

Method Summary

Methods

Modifier and Type	Method and Description
void	append(byte[] name, FileMode mode, AnyObjectId id) Append any entry to the tree.
void	append(byte[] nameBuf, int namePos, int nameLen, FileMode mode, AnyObjectId id) Append any entry to the tree.
void	append(byte[] nameBuf, int namePos, int nameLen, FileMode mode, byte[] idBuf, int idPos) Append any entry to the tree.
void	append(String name, FileMode mode, AnyObjectId id) Append any entry to the tree.
void	append(String name, RevBlob blob) Add a regular file, mode is FileMode.REGULAR_FILE.
void	append(String name, RevCommit commit) Add a link to a submodule commit, mode is FileMode.GITLINK.
void	append(String name, RevTree tree) Add a subtree, mode is FileMode.TREE.
ObjectId	computeId(ObjectInserter ins) Compute the ObjectId for this tree
static int	entrySize(FileMode mode, int nameLen) Compute the size of a tree entry record.
ObjectId	insertTo(ObjectInserter ins) Insert this tree and obtain its ObjectId.
byte[]	toByteArray() Copy this formatter's buffer into a byte array.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TreeFormatter

public TreeFormatter()

Create an empty formatter with a default buffer size.

TreeFormatter

public TreeFormatter(int size)

Create an empty formatter with the specified buffer size.

Parameters:

size - estimated size of the tree, in bytes. Callers can use entrySize(FileMode, int) to estimate the size of each entry in advance of allocating the formatter.

Method Detail

entrySize

public static int entrySize(FileMode mode,
            int nameLen)

Compute the size of a tree entry record. This method can be used to estimate the correct size of a tree prior to allocating a formatter. Getting the size correct at allocation time ensures the internal buffer is sized correctly, reducing copying.

Parameters:

mode - the mode the entry will have.

nameLen - the length of the name, in bytes.

Returns:

the length of the record.

append

public void append(String name,
          RevCommit commit)

Add a link to a submodule commit, mode is FileMode.GITLINK.

Parameters:

name - name of the entry.

commit - the ObjectId to store in this entry.

append

public void append(String name,
          RevTree tree)

Add a subtree, mode is FileMode.TREE.

Parameters:

name - name of the entry.

tree - the ObjectId to store in this entry.

append

public void append(String name,
          RevBlob blob)

Add a regular file, mode is FileMode.REGULAR_FILE.

Parameters:

name - name of the entry.

blob - the ObjectId to store in this entry.

append

public void append(String name,
          FileMode mode,
          AnyObjectId id)

Append any entry to the tree.

Parameters:

name - name of the entry.

mode - mode describing the treatment of id.

id - the ObjectId to store in this entry.

append

public void append(byte[] name,
          FileMode mode,
          AnyObjectId id)

Append any entry to the tree.

Parameters:

name - name of the entry. The name should be UTF-8 encoded, but file name encoding is not a well defined concept in Git.

mode - mode describing the treatment of id.

id - the ObjectId to store in this entry.

append

public void append(byte[] nameBuf,
          int namePos,
          int nameLen,
          FileMode mode,
          AnyObjectId id)

Append any entry to the tree.

Parameters:

nameBuf - buffer holding the name of the entry. The name should be UTF-8 encoded, but file name encoding is not a well defined concept in Git.

namePos - first position within nameBuf of the name data.

nameLen - number of bytes from nameBuf to use as the name.

mode - mode describing the treatment of id.

id - the ObjectId to store in this entry.

append

public void append(byte[] nameBuf,
          int namePos,
          int nameLen,
          FileMode mode,
          byte[] idBuf,
          int idPos)

Append any entry to the tree.

Parameters:

nameBuf - buffer holding the name of the entry. The name should be UTF-8 encoded, but file name encoding is not a well defined concept in Git.

namePos - first position within nameBuf of the name data.

nameLen - number of bytes from nameBuf to use as the name.

mode - mode describing the treatment of id.

idBuf - buffer holding the raw ObjectId of the entry.

idPos - first position within idBuf to copy the id from.

insertTo

public ObjectId insertTo(ObjectInserter ins)
                  throws IOException

Insert this tree and obtain its ObjectId.

Parameters:

ins - the inserter to store the tree.

Returns:

computed ObjectId of the tree

Throws:

IOException - the tree could not be stored.

computeId

public ObjectId computeId(ObjectInserter ins)

Compute the ObjectId for this tree

Parameters:

ins -

Returns:

ObjectId for this tree

toByteArray

public byte[] toByteArray()

Copy this formatter's buffer into a byte array. This method is not efficient, as it needs to create a copy of the internal buffer in order to supply an array of the correct size to the caller. If the buffer is just to pass to an ObjectInserter, consider using ObjectInserter.insert(TreeFormatter) instead.

Returns:

a copy of this formatter's buffer.

toString

public String toString()

Overrides:

toString in class Object