org.apache.jackrabbit.mk.blobs
Interface BlobStore

All Known Implementing Classes:

AbstractBlobStore, DbBlobStore, FileBlobStore, MemoryBlobStore

public interface BlobStore

An interface to store and read large binary objects.

Method Summary

long	getBlobLength(String blobId) Get the length of the blob.
int	readBlob(String blobId, long pos, byte[] buff, int off, int length) Read a number of bytes from a blob.
String	writeBlob(InputStream in) Write a blob from an input stream.

Method Detail

writeBlob

String writeBlob(InputStream in)
                 throws Exception

Write a blob from an input stream. This method closes the input stream.

Parameters:

in - the input stream

Returns:

the blob id

Throws:

Exception

readBlob

int readBlob(String blobId,
             long pos,
             byte[] buff,
             int off,
             int length)
             throws Exception

Read a number of bytes from a blob.

Parameters:

blobId - the blob id

pos - the position within the blob

buff - the target byte array

off - the offset within the target array

length - the number of bytes to read

Returns:

the number of bytes read

Throws:

Exception

getBlobLength

long getBlobLength(String blobId)
                   throws Exception

Get the length of the blob.

Parameters:

blobId - the blob id

Returns:

the length

Throws:

Exception