org.fcrepo.server.storage.types

Class Datastream

java.lang.Object

org.fcrepo.server.storage.types.Datastream

Direct Known Subclasses:

DatastreamManagedContent, DatastreamReferencedContent, DatastreamXMLMetadata

public class Datastream
extends Object

A Fedora datastream.

Author:

Sandy Payette

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor and Description
Datastream()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	compareChecksum()
Datastream	copy()
void	copy(Datastream target)
String	getChecksum()
String	getChecksumType()
InputStream	getContentStream()
InputStream	getContentStream(Context context)
InputStream	getContentStreamForChecksum()
static String	getDefaultChecksumType()
String	setChecksum(String csType)
static String	validateChecksumType(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 String CHECKSUMTYPE_DISABLED

See Also:

Constant Field Values

CHECKSUM_NONE

public static final String CHECKSUM_NONE

See Also:

Constant Field Values

CHECKSUM_IOEXCEPTION

public static final String CHECKSUM_IOEXCEPTION

See Also:

Constant Field Values

DS_LOCATION_TYPE_INTERNAL

public static final String DS_LOCATION_TYPE_INTERNAL

See Also:

Constant Field Values

DS_LOCATION_TYPE_URL

public static final String DS_LOCATION_TYPE_URL

See Also:

Constant Field Values

isNew

public boolean isNew

DatastreamID

public String DatastreamID

DatastreamAltIDs

public String[] DatastreamAltIDs

DSFormatURI

public String DSFormatURI

DSMIME

public String DSMIME

DSControlGrp

public 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 String DSInfoType

Used to maintain backwards compatibility with METS-Fedora

DSState

public String DSState

DSVersionable

public boolean DSVersionable

DSVersionID

public String DSVersionID

DSLabel

public String DSLabel

DSCreateDT

public Date DSCreateDT

DSSize

public long DSSize

DSLocation

public String DSLocation

DSLocationType

public String DSLocationType

DSChecksumType

public String DSChecksumType

DSChecksum

public String DSChecksum

autoChecksum

public static boolean autoChecksum

defaultChecksumType

public static String defaultChecksumType

Constructor Detail

Datastream

public Datastream()

Method Detail

getContentStream

public InputStream getContentStream()
                             throws StreamIOException

Throws:

StreamIOException

getContentStream

public InputStream getContentStream(Context context)
                             throws StreamIOException

Throws:

StreamIOException

getContentStreamForChecksum

public InputStream getContentStreamForChecksum()
                                        throws StreamIOException

Throws:

StreamIOException

getDefaultChecksumType

public static String getDefaultChecksumType()

getChecksumType

public String getChecksumType()

getChecksum

public String getChecksum()

setChecksum

public String setChecksum(String csType)

compareChecksum

public boolean compareChecksum()

validateChecksumType

public static String validateChecksumType(String checksumType)
                                   throws GeneralException

Throws:

GeneralException

copy

public Datastream copy()

copy

public void copy(Datastream target)