org.dspace.content.crosswalk
Class MODSDisseminationCrosswalk

java.lang.Object
  org.dspace.core.SelfNamedPlugin
      org.dspace.content.crosswalk.MODSDisseminationCrosswalk

All Implemented Interfaces:

DisseminationCrosswalk

public class MODSDisseminationCrosswalk
extends SelfNamedPlugin
implements DisseminationCrosswalk

Configurable MODS Crosswalk

This class supports multiple dissemination crosswalks from DSpace internal data to the MODS XML format (see http://www.loc.gov/standards/mods/.)

It registers multiple Plugin names, which it reads from the DSpace configuration as follows:

Configuration

Every key starting with "crosswalk.mods.properties." describes a MODS crosswalk. Everything after the last period is the plugin name, and the value is the pathname (relative to dspace.dir/config) of the crosswalk configuration file.

You can have two names point to the same crosswalk, just add two configuration entries with the same value, e.g.

    crosswalk.mods.properties.MODS = crosswalks/mods.properties
    crosswalk.mods.properties.default = crosswalks/mods.properties
 

The first line creates a plugin with the name "MODS" which is configured from the file dspace-dir/config/crosswalks/mods.properties.

Since there is significant overhead in reading the properties file to configure the crosswalk, and a crosswalk instance may be used any number of times, we recommend caching one instance of the crosswalk for each name and simply reusing those instances. The PluginManager does this by default.

Version:

$Revision$

Author:

Larry Stone, Scott Phillips

Field Summary

static org.jdom.Namespace	MODS_NS MODS namespace.
static String	MODS_XSD URL of MODS XML Schema

Fields inherited from interface org.dspace.content.crosswalk.DisseminationCrosswalk

XSI_NS

Constructor Summary

MODSDisseminationCrosswalk()

Method Summary

boolean	canDisseminate(DSpaceObject dso) ModsCrosswalk can disseminate: Items, Collections, Communities, and Site.
protected DCValue[]	collection2Metadata(Collection collection) Generate a list of metadata elements for the given DSpace collection.
protected DCValue[]	community2Metadata(Community community) Generate a list of metadata elements for the given DSpace community.
org.jdom.Element	disseminateElement(DSpaceObject dso) Disseminate an Item, Collection, or Community to MODS.
List<org.jdom.Element>	disseminateList(DSpaceObject dso) Returns object's metadata in MODS format, as List of XML structure nodes.
org.jdom.Namespace[]	getNamespaces() Return the MODS namespace
static String[]	getPluginNames()
String	getSchemaLocation() Return the MODS schema
protected DCValue[]	item2Metadata(Item item) Generate a list of metadata elements for the given DSpace item.
boolean	preferList() ModsCrosswalk prefer's element form over list.
protected DCValue[]	site2Metadata(Site site) Generate a list of metadata elements for the given DSpace site.

Methods inherited from class org.dspace.core.SelfNamedPlugin

getPluginInstanceName, setPluginInstanceName

Methods inherited from class java.lang.Object

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

Field Detail

MODS_NS

public static final org.jdom.Namespace MODS_NS

MODS namespace.

MODS_XSD

public static final String MODS_XSD

URL of MODS XML Schema

See Also:

Constant Field Values

Constructor Detail

MODSDisseminationCrosswalk

public MODSDisseminationCrosswalk()

Method Detail

getPluginNames

public static String[] getPluginNames()

getNamespaces

public org.jdom.Namespace[] getNamespaces()

Return the MODS namespace

Specified by:

getNamespaces in interface DisseminationCrosswalk

Returns:

array of namespaces, which may be empty.

getSchemaLocation

public String getSchemaLocation()

Return the MODS schema

Specified by:

getSchemaLocation in interface DisseminationCrosswalk

Returns:

SchemaLocation string, including URI namespace, followed by whitespace and URI of XML schema document, or empty string if unknown.

disseminateList

public List<org.jdom.Element> disseminateList(DSpaceObject dso)
                                       throws CrosswalkException,
                                              IOException,
                                              SQLException,
                                              AuthorizeException

Returns object's metadata in MODS format, as List of XML structure nodes.

Specified by:

disseminateList in interface DisseminationCrosswalk

Parameters:

dso - the DSpace Object whose metadata to export.

Returns:

results of crosswalk as list of XML elements.

Throws:

CrosswalkInternalException - (CrosswalkException) failure of the crosswalk itself.

CrosswalkObjectNotSupported - (CrosswalkException) Cannot crosswalk this kind of DSpace object.

IOException - I/O failure in services this calls

SQLException - Database failure in services this calls

AuthorizeException - current user not authorized for this operation.

CrosswalkException

disseminateElement

public org.jdom.Element disseminateElement(DSpaceObject dso)
                                    throws CrosswalkException,
                                           IOException,
                                           SQLException,
                                           AuthorizeException

Disseminate an Item, Collection, or Community to MODS.

Specified by:

disseminateElement in interface DisseminationCrosswalk

Parameters:

dso - the DSpace Object whose metadata to export.

Returns:

root Element of the target metadata, never null

Throws:

CrosswalkInternalException - (CrosswalkException) failure of the crosswalk itself.

CrosswalkObjectNotSupported - (CrosswalkException) Cannot crosswalk this kind of DSpace object.

IOException - I/O failure in services this calls

SQLException - Database failure in services this calls

AuthorizeException - current user not authorized for this operation.

CrosswalkException

canDisseminate

public boolean canDisseminate(DSpaceObject dso)

ModsCrosswalk can disseminate: Items, Collections, Communities, and Site.

Specified by:

canDisseminate in interface DisseminationCrosswalk

Parameters:

dso - dspace object, e.g. an Item.

Returns:

true when disseminator is capable of producing metadata.

preferList

public boolean preferList()

ModsCrosswalk prefer's element form over list.

Specified by:

preferList in interface DisseminationCrosswalk

Returns:

true when disseminator prefers you call disseminateList().

site2Metadata

protected DCValue[] site2Metadata(Site site)

Generate a list of metadata elements for the given DSpace site.

Parameters:

site - The site to derive metadata from

community2Metadata

protected DCValue[] community2Metadata(Community community)

Generate a list of metadata elements for the given DSpace community.

Parameters:

community - The community to derive metadata from

collection2Metadata

protected DCValue[] collection2Metadata(Collection collection)

Generate a list of metadata elements for the given DSpace collection.

Parameters:

collection - The collection to derive metadata from

item2Metadata

protected DCValue[] item2Metadata(Item item)

Generate a list of metadata elements for the given DSpace item.

Parameters:

item - The item to derive metadata from