Package org.apache.jackrabbit.oak.plugins.value

Class BinaryBasedBlob

java.lang.Object

org.apache.jackrabbit.oak.plugins.value.BinaryBasedBlob

All Implemented Interfaces:

Blob

public class BinaryBasedBlob
extends Object
implements Blob

This Blob implementation is based on an underlying Binary.

Any error accessing the underlying binary in getNewStream() will be deferred to the returned input stream.

Constructor Summary

Constructors

Constructor	Description
BinaryBasedBlob(Binary binary)

Method Summary

Modifier and Type	Method	Description
String	getContentIdentity()	A unique identifier of the content of this value.
@NotNull InputStream	getNewStream()	Delegates to Binary.getStream() and returns an input stream the always throws an IOException if the underlying binary failed to produce one.
String	getReference()	Returns a secure reference to this blob, or null if such a reference is not available.
long	length()	Delegates to Binary.getSize() and returns -1 if that fails.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.jackrabbit.oak.api.Blob

isInlined

Constructor Detail

BinaryBasedBlob

public BinaryBasedBlob(Binary binary)

Method Detail

getNewStream

@NotNull
public @NotNull InputStream getNewStream()

Delegates to Binary.getStream() and returns an input stream the always throws an IOException if the underlying binary failed to produce one.

Specified by:

getNewStream in interface Blob

Returns:

a new stream for this blob

length

public long length()

Delegates to Binary.getSize() and returns -1 if that fails.

Specified by:

length in interface Blob

Returns:

the length of this blob.

getReference

public String getReference()

Description copied from interface: Blob

Returns a secure reference to this blob, or null if such a reference is not available.

Specified by:

getReference in interface Blob

Returns:

null

See Also:

OAK-834

getContentIdentity

public String getContentIdentity()

Description copied from interface: Blob

A unique identifier of the content of this value. Usually this is a message digest of the content (a cryptographically secure one-way hash). This allows to avoid processing large binary values multiple times.

This method returns null if the identifier is unknown. The identifier may not always be available, for example if the value has not yet been saved or processed. Once an identifier is available, it will never change because values are immutable.

If two values have the same identifier, the content of the value is guaranteed to be the same. However it is not guaranteed that two values with the same content will return the same identifier.

The identifier is opaque, meaning it can have any format and size.

Specified by:

getContentIdentity in interface Blob

Returns:

null