fedora.server.storage.types
Class Datastream

java.lang.Object
  fedora.server.storage.types.Datastream

Direct Known Subclasses:

DatastreamManagedContent, DatastreamReferencedContent, DatastreamXMLMetadata

public class Datastream
extends java.lang.Object

A Fedora datastream.

Version:

$Id: Datastream.java 6261 2007-11-02 19:38:01Z haschart $

Author:

payette@cs.cornell.edu

Field Summary

static boolean	autoChecksum
static java.lang.String	CHECKSUM_IOEXCEPTION
static java.lang.String	CHECKSUMTYPE_DISABLED
java.lang.String[]	DatastreamAltIDs
java.lang.String	DatastreamID
static java.lang.String	defaultChecksumType
java.lang.String	DSChecksum
java.lang.String	DSChecksumType
java.lang.String	DSControlGrp Datastream Control Group: This indicates the nature of the repository's control over the datastream content.
java.util.Date	DSCreateDT
java.lang.String	DSFormatURI
java.lang.String	DSInfoType Used to maintain backwards compatibility with METS-Fedora
java.lang.String	DSLabel
java.lang.String	DSLocation
java.lang.String	DSLocationType
java.lang.String	DSMIME
long	DSSize
java.lang.String	DSState
boolean	DSVersionable
java.lang.String	DSVersionID
boolean	isNew

Constructor Summary

Datastream()

Method Summary

boolean	compareChecksum()
Datastream	copy()
void	copy(Datastream target)
java.lang.String	getChecksum()
java.lang.String	getChecksumType()
java.io.InputStream	getContentStream()
java.io.InputStream	getContentStreamForChecksum()
static java.lang.String	getDefaultChecksumType()
java.lang.String	setChecksum(java.lang.String csType)
static java.lang.String	validateChecksumType(java.lang.String checksumType)

Methods inherited from class java.lang.Object

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

Field Detail

CHECKSUMTYPE_DISABLED

public static final java.lang.String CHECKSUMTYPE_DISABLED

See Also:

Constant Field Values

CHECKSUM_IOEXCEPTION

public static final java.lang.String CHECKSUM_IOEXCEPTION

See Also:

Constant Field Values

isNew

public boolean isNew

DatastreamID

public java.lang.String DatastreamID

DatastreamAltIDs

public java.lang.String[] DatastreamAltIDs

DSFormatURI

public java.lang.String DSFormatURI

DSMIME

public java.lang.String DSMIME

DSControlGrp

public java.lang.String DSControlGrp

Datastream Control Group: This indicates the nature of the repository's control over the datastream content. Values are:

R = Redirected. The datastream resides on an external server and is referenced by a URL. When a dissemination request for the *datastream* comes through, Fedora sends an HTTP redirect to the client, thereby causing the client to directly access the datastream from its external location. This is useful in cases where the datastream is really some sort of streaming media that cannot be piped through Fedora, or the datastream is an HTML document with relative hyperlinks to the server on which is is normally hosted. E = External Referenced. The datastream content is external to the repository and referenced by URL. The content is not under the direct custodianship of the repository. The URL is considered public so the repository does not worry about whether it exposes the datastream location to collaborating services. M = Managed Content. The datastream content is stored and managed by the repository. The content is considered under the direct custodianship of the repository. The repository does not expose the underlying storage location to collaborating services and it mediates all access to the content by collaborating services. X = Inline XML Metadata. The datastream content is user-defined XML metadata that is stored within the digital object XML file itself. As such, it is intrinsically bound to the digital object, and by implication, it is stored and managed by the repository. The content considered under the custodianship of the repository.

DSInfoType

public java.lang.String DSInfoType

Used to maintain backwards compatibility with METS-Fedora

DSState

public java.lang.String DSState

DSVersionable

public boolean DSVersionable

DSVersionID

public java.lang.String DSVersionID

DSLabel

public java.lang.String DSLabel

DSCreateDT

public java.util.Date DSCreateDT

DSSize

public long DSSize

DSLocation

public java.lang.String DSLocation

DSLocationType

public java.lang.String DSLocationType

DSChecksumType

public java.lang.String DSChecksumType

DSChecksum

public java.lang.String DSChecksum

autoChecksum

public static boolean autoChecksum

defaultChecksumType

public static java.lang.String defaultChecksumType

Constructor Detail

Datastream

public Datastream()

Method Detail

getContentStream

public java.io.InputStream getContentStream()
                                     throws StreamIOException

Throws:

StreamIOException

getContentStreamForChecksum

public java.io.InputStream getContentStreamForChecksum()
                                                throws StreamIOException

Throws:

StreamIOException

getDefaultChecksumType

public static java.lang.String getDefaultChecksumType()

getChecksumType

public java.lang.String getChecksumType()

getChecksum

public java.lang.String getChecksum()

setChecksum

public java.lang.String setChecksum(java.lang.String csType)

compareChecksum

public boolean compareChecksum()

validateChecksumType

public static java.lang.String validateChecksumType(java.lang.String checksumType)
                                             throws GeneralException

Throws:

GeneralException

copy

public Datastream copy()

copy

public void copy(Datastream target)