org.imixs.workflow.jee.ejb
Interface EntityService

All Known Subinterfaces:

EntityServiceRemote

public interface EntityService

The EntityService is used to save and load instances of ItemCollection into a Database. The EntityService throws an AccessDeniedException if the CallerPrincipal is not allowed to save or read a specific ItemCollection from the database. So the EntityService can be used to save business objects into a database with individual read- or writeAccess restrictions.

Version:

1.0

Author:

rsoika

Field Summary

static int	TYP_AUTHOR
static int	TYP_CALENDAR
static int	TYP_DOUBLE
static int	TYP_INT
static int	TYP_READER
static int	TYP_TEXT

Method Summary

void	addIndex(java.lang.String stitel, int ityp) Adds an EntityIndex to the current list of external properties.
java.util.Collection<org.imixs.workflow.ItemCollection>	findAllEntities(java.lang.String query, int startpos, int count) The method returns a collection of ItemCollections.
java.util.Collection<EntityIndex>	findAllEntityIndices() The method returns a list of EntityIndex which defines external properties
java.lang.String	getAccessRoles() Returns additional AccessRoles defined for the EJB instance
java.lang.String	getReadAccessFields() Returns additional ReadAccessFields defined for the EJB instance.
java.lang.String	getWriteAccessFields() Returns additional WriteAccessFields defined for the EJB instance.
org.imixs.workflow.ItemCollection	load(java.lang.String id) This method loads an ItemCollection from the Database.
void	remove(org.imixs.workflow.ItemCollection itemcol) This method removes an ItemCollection from the database.
void	removeIndex(java.lang.String stitel) Removes an EntityIndex from the current list of external properties.
org.imixs.workflow.ItemCollection	save(org.imixs.workflow.ItemCollection itemcol) This Method saves an ItemCollection into a database.

Field Detail

TYP_TEXT

static final int TYP_TEXT

See Also:

Constant Field Values

TYP_INT

static final int TYP_INT

See Also:

Constant Field Values

TYP_DOUBLE

static final int TYP_DOUBLE

See Also:

Constant Field Values

TYP_CALENDAR

static final int TYP_CALENDAR

See Also:

Constant Field Values

TYP_READER

static final int TYP_READER

See Also:

Constant Field Values

TYP_AUTHOR

static final int TYP_AUTHOR

See Also:

Constant Field Values

Method Detail

getAccessRoles

java.lang.String getAccessRoles()

Returns additional AccessRoles defined for the EJB instance

Returns:

getReadAccessFields

java.lang.String getReadAccessFields()

Returns additional ReadAccessFields defined for the EJB instance. Default=$ReadAccess

Returns:

getWriteAccessFields

java.lang.String getWriteAccessFields()

Returns additional WriteAccessFields defined for the EJB instance. Default=$WriteAccess

Returns:

save

org.imixs.workflow.ItemCollection save(org.imixs.workflow.ItemCollection itemcol)
                                       throws org.imixs.workflow.exceptions.AccessDeniedException

This Method saves an ItemCollection into a database. If the ItemCollection is saved the first time the method generates a uniqueID ('$uniqueid') which can be used to identify the ItemCollection by its ID. If the ItemCollection was saved before the method updates the ItemCollection stored in the database. The Method returns an updated instance of the ItemCollection containing the attributes $modified, $created, and $uniqueid

The method throws an AccessDeniedException if the CallerPrincipal is not allowed to save or update the ItemCollection in the database. The CallerPrincipial should have at least the access Role org.imixs.ACCESSLEVEL.AUTHORACCESS

Parameters:

ItemCollection - to be saved

Returns:

updated ItemCollection

Throws:

org.imixs.workflow.exceptions.AccessDeniedException

load

org.imixs.workflow.ItemCollection load(java.lang.String id)

This method loads an ItemCollection from the Database. The method expects a valid $unqiueID to identify the ItemCollection saved before into the database. The method returns null if no ItemCollection with the corresponding ID exists.

The method checks also if the CallerPrincipal has read access to ItemCollection stored in the database. If not the method returns null. The method dose not throw an AccessDeniedException if the user is not allowed to read the entity to prevent a aggressor with informations about the existence of that specific ItemCollection.

CallerPrincipial should have at least the access Role org.imixs.ACCESSLEVEL.READACCESS

Parameters:

id - the $unqiueid of the ItemCollection to be loaded

Returns:

ItemCollection object or null if the ItemColleciton dose not exist or the CallerPrincipal hat insufficient read access.

remove

void remove(org.imixs.workflow.ItemCollection itemcol)
            throws org.imixs.workflow.exceptions.AccessDeniedException,
                   org.imixs.workflow.exceptions.InvalidWorkitemException

This method removes an ItemCollection from the database. If the CallerPrincipal is not allowed to access the ItemColleciton the method throws an AccessDeniedException.

The CallerPrincipial should have at least the access Role org.imixs.ACCESSLEVEL.AUTHORACCESS

Parameters:

ItemCollection - to be removed

Throws:

java.lang.Exception

org.imixs.workflow.exceptions.AccessDeniedException

org.imixs.workflow.exceptions.InvalidWorkitemException

addIndex

void addIndex(java.lang.String stitel,
              int ityp)
              throws java.lang.Exception

Adds an EntityIndex to the current list of external properties. A EntityIndex defines a Index to a specific Attribute provided by ItemCollections saved to the database. The method throws an AccessDeniedException if the CallerPrinciapal is not in the role org.imixs.ACCESSLEVEL.MANAGERACCESS.

Parameters:

stitel -

ityp - - Type of EntityIndex

Throws:

java.lang.Exception

removeIndex

void removeIndex(java.lang.String stitel)
                 throws java.lang.Exception

Removes an EntityIndex from the current list of external properties. The method throws an AccessDeniedException if the CallerPrinciapal is not in the role org.imixs.ACCESSLEVEL.MANAGERACCESS.

Parameters:

stitel -

Throws:

java.lang.Exception

findAllEntityIndices

java.util.Collection<EntityIndex> findAllEntityIndices()

The method returns a list of EntityIndex which defines external properties

Returns:

findAllEntities

java.util.Collection<org.imixs.workflow.ItemCollection> findAllEntities(java.lang.String query,
                                                                        int startpos,
                                                                        int count)

The method returns a collection of ItemCollections. The method expects an valid EQL statement. The method returns only ItemCollections which are readable by the CallerPrincipal. With the startpos and count parameters it is possible to read chunks of entities.

Parameters:

query -

startpos -

count -

Returns: