Module org.eclipse.persistence.jpars.server
Package org.eclipse.persistence.jpa.rs

Class PersistenceContext

java.lang.Object
org.eclipse.persistence.jpa.rs.PersistenceContext
public class PersistenceContext extends Object
A wrapper around the JPA and JAXB artifacts used to persist an application. A PersistenceContext provides the capability of using the same persistence unit in JPA to to interact with a Database or other JPA-capable data source and in JAXB to interact with either XML or JSON. A PersistenceContext can wrap either an existing persistence unit (EntityManagerFactory), or it can be used to bootstrap a fully dynamic persistence unit.

  • Field Details

    • JPARS_CONTEXT

      public static final String JPARS_CONTEXT
      See Also:

    • CLASS_NAME

      public static final String CLASS_NAME

    • SESSION_VERSION_PROPERTY

      public static final String SESSION_VERSION_PROPERTY
      See Also:

    • adapters

      protected List<XmlAdapter<?,?>> adapters

    • name

      protected String name
      The name of the persistence context is used to look it up. By default it will be the persistence unit name of the JPA persistence unit.

    • emf

      protected EntityManagerFactory emf
      The EntityManagerFactory used to interact using JPA

    • jaxbContext

      protected JAXBContext jaxbContext
      The JAXBConext used to produce JSON or XML

    • baseURI

      protected URI baseURI
      The URI of the Persistence context. This is used to build Links in JSON and XML

  • Constructor Details

    • PersistenceContext

      protected PersistenceContext()

    • PersistenceContext

      public PersistenceContext(String emfName, EntityManagerFactory emf, URI defaultURI)
      Instantiates a new persistence context.
      Parameters:
      emfName - the emf name
      emf - the emf
      defaultURI - the default uri

    • PersistenceContext

      public PersistenceContext(String emfName, EntityManagerFactory emf, URI defaultURI, ServiceVersion version)
      Instantiates a new persistence context.
      Parameters:
      emfName - the emf name
      emf - the emf
      defaultURI - the default uri
      version - REST service version

  • Method Details

    • isWeavingEnabled

      public boolean isWeavingEnabled()
      Checks if is weaving enabled.
      Returns:
      true, if is weaving enabled

    • getVersion

      public String getVersion()
      Gets the version as it appears in URI.
      Returns:
      The version.

    • getServiceVersion

      public ServiceVersion getServiceVersion()
      Gets JPARS version.
      Returns:
      JPARS version.

    • addDynamicXMLMetadataSources

      protected void addDynamicXMLMetadataSources(List<Object> metadataSources, Session session)
      This method is used to help construct a JAXBContext from an existing EntityManagerFactory. For each package in the EntityManagerFactory, a MetadataSource that is capable of building a JAXBContext that creates the same mappings in JAXB is created. These MetadataSources are used to constuct the JAXContext that is used for JSON and XML translation.

    • create

      public void create(Map<String,String> tenantId, Object entity) throws Exception
      A part of the facade over the JPA API. Persist an entity in JPA and commit.
      Throws:
      Exception

    • createDynamicJAXBContext

      protected JAXBContext createDynamicJAXBContext(Session session) throws JAXBException, IOException
      Create a JAXBContext based on the EntityManagerFactory for this PersistenceContext.
      Throws:
      JAXBException
      IOException

    • createEntityManagerFactory

      protected EntityManagerFactory createEntityManagerFactory(PersistenceUnitInfo info, Map<String,?> properties)
      A part of the facade over the JPA API. Create an EntityManagerFactory using the given PersistenceUnitInfo and properties.

    • createEntityManager

      protected EntityManager createEntityManager(String tenantId)
      A part of the facade over the JPA API Create an EntityManager from the EntityManagerFactory wrapped by this persistence context

    • createJAXBProperties

      protected Map<String,Object> createJAXBProperties(Session session) throws IOException
      Build the set of properties used to create the JAXBContext based on the EntityManagerFactory that this PersistenceContext wraps
      Throws:
      IOException

    • delete

      public void delete(Map<String,String> tenantId, String type, Object id)
      A part of the facade over the JPA API Delete the given entity in JPA and commit the changes

    • doesExist

      public boolean doesExist(Map<String,String> tenantId, Object entity)
      Does exist.
      Parameters:
      tenantId - the tenant id
      entity - the entity
      Returns:
      true, if successful

    • finalize

      protected void finalize() throws Throwable
      Finalize.
      Overrides:
      finalize in class Object
      Throws:
      Throwable

    • find

      public Object find(String entityName, Object id)
      A part of the facade over the JPA API Find an entity with the given name and id in JPA

    • find

      public Object find(Map<String,String> tenantId, String entityName, Object id)
      A part of the facade over the JPA API Find an entity with the given name and id in JPA

    • find

      public Object find(Map<String,String> tenantId, String entityName, Object id, Map<String,Object> properties)
      A part of the facade over the JPA API Find an entity with the given name and id in JPA
      Parameters:
      properties - - query hints used on the find

    • updateOrAddAttribute

      public Object updateOrAddAttribute(Map<String,String> tenantId, String entityName, Object id, Map<String,Object> properties, String attribute, Object attributeValue, String partner)
      Update or add attribute.
      Parameters:
      tenantId - the tenant id
      entityName - the entity name
      id - the id
      properties - the properties
      attribute - the attribute
      attributeValue - the attribute value
      partner - the partner
      Returns:
      the object

    • removeAttribute

      public Object removeAttribute(Map<String,String> tenantId, String entityName, Object id, String attribute, String listItemId, Object entity, String partner)
      Removes the attribute.
      Parameters:
      tenantId - the tenant id
      entityName - the entity name
      id - the id
      attribute - the attribute
      partner - the partner
      Returns:
      the object

    • removeMappingValueFromObject

      protected void removeMappingValueFromObject(Object object, Object attributeValue, DatabaseMapping mapping, DatabaseMapping partner)

    • getBaseURI

      public URI getBaseURI()
      Gets the base uri.
      Returns:
      the base uri

    • getClass

      public Class<?> getClass(String entityName)
      Look-up the given entity name in the EntityManagerFactory and return the class is describes

    • getServerSession

      public DatabaseSession getServerSession()
      Gets the jpa server session.
      Returns:
      the jpa server session

    • getClientSession

      public AbstractSession getClientSession(EntityManager em)
      Gets the client session.
      Parameters:
      em - the em
      Returns:
      the client session

    • getDescriptor

      public ClassDescriptor getDescriptor(String entityName)
      Lookup the descriptor for the given entity name. This method will look first in the EntityManagerFactory wrapped by this persistence context and return that descriptor. If one does not exist, it search the JAXBContext and return a descriptor from there.

    • getDescriptorForClass

      public ClassDescriptor getDescriptorForClass(Class clazz)
      Gets the descriptor for class.
      Parameters:
      clazz - the clazz
      Returns:
      the descriptor for class

    • getJAXBDescriptorForClass

      public ClassDescriptor getJAXBDescriptorForClass(Class clazz)
      Gets the jAXB descriptor for class.
      Parameters:
      clazz - the clazz
      Returns:
      the jAXB descriptor for class

    • getEmf

      public EntityManagerFactory getEmf()
      Gets the emf.
      Returns:
      the emf

    • getJAXBContext

      public JAXBContext getJAXBContext()
      Gets the jAXB context.
      Returns:
      the jAXB context

    • getName

      public String getName()
      Gets the name.
      Returns:
      the name

    • getSessionLog

      public SessionLog getSessionLog()

    • merge

      public Object merge(Map<String,String> tenantId, Object entity)
      A part of the facade over the JPA API Call jpa merge on the given object and commit If the passed object is a list, we will iterate through the list and merge each member

    • newEntity

      public DynamicEntity newEntity(String type)
      A convenience method to create a new dynamic entity of the given type

    • newEntity

      public DynamicEntity newEntity(Map<String,String> tenantId, String type)
      A convenience method to create a new dynamic entity of the given type

    • queryExecuteUpdate

      public int queryExecuteUpdate(Map<String,String> tenantId, String name, Map<?,?> parameters, Map<String,?> hints)
      Query execute update.
      Parameters:
      tenantId - the tenant id
      name - the name
      parameters - the parameters
      hints - the hints
      Returns:
      the int

    • queryMultipleResults

      public List queryMultipleResults(Map<String,String> tenantId, String name, Map<?,?> parameters, Map<String,?> hints)
      Query multiple results.
      Parameters:
      tenantId - the tenant id
      name - the name
      parameters - the parameters
      hints - the hints
      Returns:
      the list

    • constructQuery

      protected Query constructQuery(EntityManager em, String name, Map<?,?> parameters, Map<String,?> hints)

    • buildQuery

      public Query buildQuery(Map<String,String> tenantId, String name, Map<?,?> parameters, Map<String,?> hints)
      Builds the query.
      Parameters:
      tenantId - the tenant id
      name - the name
      parameters - the parameters
      hints - the hints
      Returns:
      the query

    • setMappingValueInObject

      protected void setMappingValueInObject(Object object, Object attributeValue, DatabaseMapping mapping, DatabaseMapping partner)

    • stop

      public void stop()
      Stop the current application instance

    • toString

      public String toString()
      To string.
      Overrides:
      toString in class Object
      Returns:
      the string

    • unmarshalEntity

      public Object unmarshalEntity(String type, MediaType acceptedMediaType, InputStream in) throws JAXBException
      Unmarshal entity.
      Parameters:
      type - the type of the entity to unmarshal
      acceptedMediaType - the accepted media type
      in - the input stream to unmarshal
      Returns:
      the object
      Throws:
      JAXBException - the JAXB exception

    • unmarshal

      public Object unmarshal(Class type, MediaType acceptedMediaType, InputStream in) throws JAXBException
      Unmarshal.
      Parameters:
      type - the type of the entity to unmarshal
      acceptedMediaType - the accepted media type
      in - the input stream to unmarshal
      Returns:
      the object
      Throws:
      JAXBException - the JAXB exception

    • wrap

      protected Object wrap(Object entity)
      Make adjustments to an unmarshalled entity based on what is found in the weaved fields

    • marshallEntity

      public void marshallEntity(Object object, MediaType mediaType, OutputStream output) throws JAXBException
      Marshall an entity to either JSON or XML Calling this method, will treat relationships as unfetched in the XML/JSON and marshall them as links rather than attempting to marshall the data in those relationships
      Throws:
      JAXBException

    • marshallEntity

      public void marshallEntity(Object object, FieldsFilter filter, MediaType mediaType, OutputStream output) throws JAXBException
      Marshall an entity to either JSON or XML.
      Parameters:
      object - the object to marshal.
      filter - the filter (included/excluded fields) to use.
      mediaType - the media type (XML/JSON).
      output - the result.
      Throws:
      JAXBException

    • marshall

      public void marshall(Object object, MediaType mediaType, OutputStream output, boolean sendRelationships) throws JAXBException
      Marshall an entity to either JSON or XML.
      Parameters:
      sendRelationships - if this is set to true, relationships will be sent as links instead of sending. the actual objects in the relationships
      Throws:
      JAXBException

    • marshall

      public void marshall(Object object, MediaType mediaType, OutputStream output, boolean sendRelationships, FieldsFilter fieldsFilter) throws JAXBException
      Marshall an entity to either JSON or XML.
      Parameters:
      object - the object to marshal.
      mediaType - the media type (XML/JSON).
      output - the result.
      sendRelationships - if this is set to true, relationships will be sent as links instead of sending the actual objects in the relationships.
      fieldsFilter - Specifies fields to include/exclude from the response.
      Throws:
      JAXBException

    • preMarshallEntity

      protected void preMarshallEntity(Object object)
      Process an entity and add any additional data that needs to be added prior to marshalling This method will both single entities and lists of entities

    • preMarshallIndividualEntity

      protected void preMarshallIndividualEntity(Object entity)
      Add any data required prior to marshalling an entity to XML or JSON In general, this will only affect fields that have been weaved into the object

    • postMarshallEntity

      protected void postMarshallEntity(Object object)

    • getAdapters

      protected List<XmlAdapter<?,?>> getAdapters() throws JPARSException
      Throws:
      JPARSException

    • getSupportedFeatureSet

      public FeatureSet getSupportedFeatureSet()
      Gets the supported feature set.
      Returns:
      the supported feature set.

    • isQueryPageable

      public boolean isQueryPageable(String queryName)
      Finds out is given query pageable or not.
      Parameters:
      queryName - named query to check.
      Returns:
      true if pageable, false if not.

    • getPageableQuery

      public RestPageableQuery getPageableQuery(String queryName)
      Gets REST pageable query details by query name.
      Parameters:
      queryName - named query name.
      Returns:
      RestPageableQuery or null if query couldn't be found.

    • setVersion

      public void setVersion(String version)
      Sets the version.
      Parameters:
      version - the new version.

    • setBaseURI

      public void setBaseURI(URI baseURI)
      Sets the base uri.
      Parameters:
      baseURI - the new base uri

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • equals

      public boolean equals(Object other)
      Overrides:
      equals in class Object