org.modeshape.jcr.api

Interface Binary

All Superinterfaces:

Binary

All Known Subinterfaces:

BinaryValue

All Known Implementing Classes:

AbstractBinary, EmptyBinaryValue, ExternalBinaryValue, FileUrlBinaryValue, GitBinaryValue, InMemoryBinaryValue, StoredBinaryValue, UrlBinaryValue

public interface Binary
extends Binary

An extension of the standard Binary interface, with methods to obtain the SHA-1 hash of the binary value.

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	getHash() Get the SHA-1 hash of the contents.
String	getHexHash() Get the hexadecimal form of the SHA-1 hash of the contents.
String	getMimeType() Get the MIME type for this binary value.
String	getMimeType(String name) Get the MIME type for this binary value.

Methods inherited from interface javax.jcr.Binary

dispose, getSize, getStream, read

Method Detail

getHash

byte[] getHash()

Get the SHA-1 hash of the contents. This hash can be used to determine whether two Binary instances contain the same content.

Repeatedly calling this method should generally be efficient, as it most implementations will compute the hash only once.

Returns:

the hash of the contents as a byte array, or an empty array if the hash could not be computed.

See Also:

MessageDigest.digest(byte[]), MessageDigest.getInstance(String), getHexHash()

getHexHash

String getHexHash()

Get the hexadecimal form of the SHA-1 hash of the contents. This hash can be used to determine whether two Binary instances contain the same content.

Repeatedly calling this method should generally be efficient, as it most implementations will compute the hash only once.

Returns:

the hexadecimal form of the getHash(), or a null string if the hash could not be computed or is not known

See Also:

MessageDigest.digest(byte[]), MessageDigest.getInstance(String), getHash()

getMimeType

String getMimeType()
                   throws IOException,
                          RepositoryException

Get the MIME type for this binary value.

Returns:

the MIME type, or null if it cannot be determined (e.g., the Binary is empty)

Throws:

IOException - if there is a problem reading the binary content

RepositoryException - if an error occurs.

getMimeType

String getMimeType(String name)
                   throws IOException,
                          RepositoryException

Get the MIME type for this binary value.

Parameters:

name - the name of the binary value, useful in helping to determine the MIME type

Returns:

the MIME type, or null if it cannot be determined (e.g., the Binary is empty)

Throws:

IOException - if there is a problem reading the binary content

RepositoryException - if an error occurs.