Package org.odpi.openmetadata.frameworks.governanceaction

Interface OpenMetadataStore

All Known Implementing Classes:

OpenMetadataClient

public interface OpenMetadataStore

OpenMetadataStore provides access to metadata elements stored in the metadata repositories. It is implemented by the abstract class OpenMetadataClient and used by all of the governance action services to retrieve metadata. The concrete class for OpenMetadataClient is implemented by a metadata repository provider. In Egeria, this class is implemented in the Governance Engine OMAS client.

Method Summary

Modifier and Type	Method	Description
List<OpenMetadataElement>	findMetadataElements(String metadataElementTypeName, List<String> metadataElementSubtypeName, SearchProperties searchProperties, List<ElementStatus> limitResultsByStatus, SearchClassifications matchClassifications, String sequencingProperty, SequencingOrder sequencingOrder, int startFrom, int pageSize)	Return a list of metadata elements that match the supplied criteria.
List<OpenMetadataElement>	findMetadataElementsWithString(String searchString, int startFrom, int pageSize)	Retrieve the metadata elements that contain the requested string.
List<RelatedMetadataElements>	findRelationshipsBetweenMetadataElements(String relationshipTypeName, SearchProperties searchProperties, String sequencingProperty, SequencingOrder sequencingOrder, int startFrom, int pageSize)	Return a list of relationships that match the requested conditions.
OpenMetadataElement	getMetadataElementByGUID(String elementGUID)	Retrieve the metadata element using its unique identifier.
OpenMetadataElement	getMetadataElementByUniqueName(String uniqueName, String uniquePropertyName)	Retrieve the metadata element using its unique name (typically the qualified name).
String	getMetadataElementGUIDByUniqueName(String uniqueName, String uniquePropertyName)	Retrieve the unique identifier of a metadata element using its unique name (typically the qualified name).
List<RelatedMetadataElement>	getRelatedMetadataElements(String elementGUID, int startingAtEnd, String relationshipTypeName, int startFrom, int pageSize)	Retrieve the metadata elements connected to the supplied element.

Method Detail

getMetadataElementByGUID

OpenMetadataElement getMetadataElementByGUID(String elementGUID)
                                      throws InvalidParameterException,
                                             UserNotAuthorizedException,
                                             PropertyServerException

Retrieve the metadata element using its unique identifier.

Parameters:

elementGUID - unique identifier for the metadata element

Returns:

metadata element properties

Throws:

InvalidParameterException - the unique identifier is null or not known.

UserNotAuthorizedException - the governance action service is not able to access the element

PropertyServerException - there is a problem accessing the metadata store

getMetadataElementByUniqueName

OpenMetadataElement getMetadataElementByUniqueName(String uniqueName,
                                                   String uniquePropertyName)
                                            throws InvalidParameterException,
                                                   UserNotAuthorizedException,
                                                   PropertyServerException

Retrieve the metadata element using its unique name (typically the qualified name).

Parameters:

uniqueName - unique name for the metadata element

uniquePropertyName - name of property name to test in the open metadata element - if null "qualifiedName" is used

Returns:

metadata element properties

Throws:

InvalidParameterException - the unique identifier is null or not known.

UserNotAuthorizedException - the governance action service is not able to access the element

PropertyServerException - there is a problem accessing the metadata store

getMetadataElementGUIDByUniqueName

String getMetadataElementGUIDByUniqueName(String uniqueName,
                                          String uniquePropertyName)
                                   throws InvalidParameterException,
                                          UserNotAuthorizedException,
                                          PropertyServerException

Retrieve the unique identifier of a metadata element using its unique name (typically the qualified name).

Parameters:

uniqueName - unique name for the metadata element

uniquePropertyName - name of property name to test in the open metadata element - if null "qualifiedName" is used

Returns:

metadata element unique identifier (guid)

Throws:

InvalidParameterException - the unique identifier is null or not known.

UserNotAuthorizedException - the governance action service is not able to access the element

PropertyServerException - there is a problem accessing the metadata store

findMetadataElementsWithString

List<OpenMetadataElement> findMetadataElementsWithString(String searchString,
                                                         int startFrom,
                                                         int pageSize)
                                                  throws InvalidParameterException,
                                                         UserNotAuthorizedException,
                                                         PropertyServerException

Retrieve the metadata elements that contain the requested string.

Parameters:

searchString - name to retrieve

startFrom - paging start point

pageSize - maximum results that can be returned

Returns:

list of matching metadata elements (or null if no elements match the name)

Throws:

InvalidParameterException - the qualified name is null

UserNotAuthorizedException - the governance action service is not able to access the element

PropertyServerException - there is a problem accessing the metadata store

getRelatedMetadataElements

List<RelatedMetadataElement> getRelatedMetadataElements(String elementGUID,
                                                        int startingAtEnd,
                                                        String relationshipTypeName,
                                                        int startFrom,
                                                        int pageSize)
                                                 throws InvalidParameterException,
                                                        UserNotAuthorizedException,
                                                        PropertyServerException

Retrieve the metadata elements connected to the supplied element.

Parameters:

elementGUID - unique identifier for the starting metadata element

startingAtEnd - indicates which end to retrieve from (0 is "either end"; 1 is end1; 2 is end 2)

relationshipTypeName - type name of relationships to follow (or null for all)

startFrom - paging start point

pageSize - maximum results that can be returned

Returns:

list of related elements

Throws:

InvalidParameterException - the unique identifier is null or not known; the relationship type is invalid

UserNotAuthorizedException - the governance action service is not able to access the elements

PropertyServerException - there is a problem accessing the metadata store

findMetadataElements

List<OpenMetadataElement> findMetadataElements(String metadataElementTypeName,
                                               List<String> metadataElementSubtypeName,
                                               SearchProperties searchProperties,
                                               List<ElementStatus> limitResultsByStatus,
                                               SearchClassifications matchClassifications,
                                               String sequencingProperty,
                                               SequencingOrder sequencingOrder,
                                               int startFrom,
                                               int pageSize)
                                        throws InvalidParameterException,
                                               UserNotAuthorizedException,
                                               PropertyServerException

Return a list of metadata elements that match the supplied criteria. The results can be returned over many pages.

Parameters:

metadataElementTypeName - type of interest (null means any element type)

metadataElementSubtypeName - optional list of the subtypes of the metadataElementTypeName to include in the search results. Null means all subtypes.

searchProperties - Optional list of entity property conditions to match.

limitResultsByStatus - By default, entities in all statuses (other than DELETE) are returned. However, it is possible to specify a list of statuses (eg ACTIVE) to restrict the results to. Null means all status values.

matchClassifications - Optional list of classifications to match.

sequencingProperty - String name of the property that is to be used to sequence the results. Null means do not sequence on a property name (see SequencingOrder).

sequencingOrder - Enum defining how the results should be ordered.

startFrom - paging start point

pageSize - maximum results that can be returned

Returns:

a list of elements matching the supplied criteria; null means no matching elements in the metadata store.

Throws:

InvalidParameterException - one of the search parameters are is invalid

UserNotAuthorizedException - the governance action service is not able to access the elements

PropertyServerException - there is a problem accessing the metadata store

findRelationshipsBetweenMetadataElements

List<RelatedMetadataElements> findRelationshipsBetweenMetadataElements(String relationshipTypeName,
                                                                       SearchProperties searchProperties,
                                                                       String sequencingProperty,
                                                                       SequencingOrder sequencingOrder,
                                                                       int startFrom,
                                                                       int pageSize)
                                                                throws InvalidParameterException,
                                                                       UserNotAuthorizedException,
                                                                       PropertyServerException

Return a list of relationships that match the requested conditions. The results can be received as a series of pages.

Parameters:

relationshipTypeName - relationship's type. Null means all types (but may be slow so not recommended).

searchProperties - Optional list of relationship property conditions to match.

sequencingProperty - String name of the property that is to be used to sequence the results. Null means do not sequence on a property name (see SequencingOrder).

sequencingOrder - Enum defining how the results should be ordered.

startFrom - paging start point

pageSize - maximum results that can be returned

Returns:

a list of relationships. Null means no matching relationships.

Throws:

InvalidParameterException - one of the search parameters are is invalid

UserNotAuthorizedException - the governance action service is not able to access the elements

PropertyServerException - there is a problem accessing the metadata store