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- Resolution: IdentifierService act in a manner similar to the exisitng HandleManager in DSpace, allowing for resolution of DSpace Items from provided identifiers.
- Minting: Minting is the act of reserving and returning an identifier that may be used with a specific DSpaceObject.
- Registering: Registering is the act of recording the existence of a minted identifier with an external persistent resolver service, these services may reside ont he local machine (HandleManager) or exist as external services (PURL or DEZID DOI registrations services)
Code: Google Code
Application IdentifierService Interface
| Code Block | ||
|---|---|---|
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public interface IdentifierService {
void reserve(Context context, Item item) throws AuthorizeException, SQLException, IdentifierException;
String register(Context context, Item item) throws AuthorizeException, SQLException, IdentifierException;
DSpaceObject resolve(Context context, String identifier) throws IdentifierNotFoundException, IdentifierNotResolvableException;
void delete(Context context, Item item) throws AuthorizeException, SQLException, IdentifierException;
} |
Backend
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IdentifierProvider Interface
| Code Block |
|---|
public abstract class IdentifierProvider {
protected IdentifierService parentService;
protected ConfigurationService configurationService;
@Autowired
@Required
public void setConfigurationService(ConfigurationService configurationService) {
this.configurationService = configurationService;
}
public void setParentService(IdentifierService parentService) {
this.parentService = parentService;
}
public abstract boolean supports(String identifier);
public abstract String register(Context context, DSpaceObject item) throws IdentifierException;
public abstract String mint(Context context, DSpaceObject dso) throws IdentifierException;
public abstract DSpaceObject resolve(Context context, String identifier, String... attributes) throws IdentifierNotFoundException, IdentifierNotResolvableException;;
public abstract void delete(Context context, DSpaceObject dso) throws IdentifierException;
} |
Example of Spring Configuration for Default HandleProvider Support
| Code Block |
|---|
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd">
<bean class="org.dspace.identifier.HandleIdentifierProvider" scope="singleton"/>
<bean class="org.dspace.identifier.InternalIdentifierProvider" scope="singleton"/>
<bean class="org.dspace.identifier.IdentifierServiceImpl" id="org.dspace.identifier.IdentifierService" autowire="byType" scope="singleton"/>
</beans> |
Addons Can easily add additional Providers without directly needing to alter DSpace Code
See Dryad Specific Identifier and Versioning Services
| Code Block |
|---|
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd">
<bean class="org.dspace.versioning.DryadPackageVersionProvider" autowire="byType"/>
<bean class="org.dspace.identifier.DOIIdentifierProvider" scope="singleton"/>
</beans> |
The IdentifierProviders are also responsible for altering any existing DSpace metadata fields that need to be altered on the new and previous items to record the relationship between Item Versions.
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