jobmatch.data
Class AreaBDO

java.lang.Object
  |
  +--jobmatch.data.AreaBDO

Direct Known Subclasses:

Area

public class AreaBDO

extends Object

implements Serializable

AreaBDO contains the same set and get methods as the AreaDO class. Business Object (BO) classes typically need these set and get methods. So by deriving a BO from a BDO, or by implementing a BO that contains a BDO, the developer of the BO is spared some work.

Version:

$Revision: 1.5 $

See Also:

Serialized Form

Field Summary

protected AreaDO

DO The AreaDO object upon which the set and get methods operate.

Constructor Summary

AreaBDO()
Constructor required by AreaBDO.create methods.

AreaBDO(AreaDO DO)
Constructor for use by classes derived from AreaBDO.

Method Summary

protected void	afterAnySet()
protected void	beforeAnyGet() The developer of a Business Object that derives from this class can override the methods: beforeAnyGet beforeAnySet afterAnySet to handle any general assertions or cleanup needed for get and set methods.
protected void	beforeAnySet()
void	commit() Inserts/Updates the DO into its table.
void	commit(jobmatch.data.DBTransaction dbt) Inserts/Updates the DO into its table.
static AreaBDO	createExisting(AreaDO DO) The createExisting method is used to create a AreaBDO from a AreaDO that was returned by the AreaQuery class.
static AreaBDO	createVirgin() Like the class AreaDO, this class acts as a factory.
void	delete() Deletes the DO from its table.
void	delete(jobmatch.data.DBTransaction dbt) Deletes the DO from its table.
static AreaBDO[]	getBDOarray() The getBDOarray method performs a database query to return an array of AreaBDO objects representing all the rows in the Area table.
String	getDescription() Get Description of the AreaDO
AreaDO	getDO() Note: This method is intended for use only by other BDO classes.
String	getHandle() The methods getHandle hasMatchingHandle are used by Presentation Objects that need to populate HTML select lists with AreaBDO objects as options.
boolean	hasMatchingHandle(String handle)
protected void	modifyDO(jobmatch.data.DBTransaction dbt, boolean delete) Modifies the DO within its table.
void	setDescription(String Description) Set Description of the AreaDO
String	toString() for debugging

Methods inherited from class java.lang.Object

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

Field Detail

DO

protected AreaDO DO

The AreaDO object upon which the set and get methods operate. This member is protected so that classes derived from AreaBDO can access the underlying Data Object.

Constructor Detail

AreaBDO

public AreaBDO(AreaDO DO)

Constructor for use by classes derived from AreaBDO. Example usage: class CustomerBO extends CustomerBDO { // a BDO class is commonly extended in order to implement: public void beforeAnySet() throws Exception { if ( CustomerDO should not be altered ) throw new ApplicationException( "ERROR" ); } public CustomerBO( CustomerDO DO ) { super( DO ); } } class SomePresentationLayerClass { public CustomerBO findCustomer( String name ) { CustomerQuery q = new CustomerQuery(); q.setQueryName( name ); CustomerDO DO = q.getNextDO(); // Here the CustomerBO ctor fires the CustomerBDO ctor. return new CustomerBO( DO ); } }

AreaBDO

public AreaBDO()
        throws Exception

Constructor required by AreaBDO.create methods.

Method Detail

getDO

public AreaDO getDO()

Note: This method is intended for use only by other BDO classes. Presentation Layer classes should (theoretically) always use the Business Layer (BDO) to create/access Data Layer (DO) objects. The overhead for using BDO objects is small (the BDO classes are fairly lightweight.)

Returns:

The DO object held by this BDO object.

createVirgin

public static AreaBDO createVirgin()
                            throws Exception

Like the class AreaDO, this class acts as a factory. Business Object (BO) classes typically need these set and get methods. So by deriving a BO from a BDO, or by implementing a BO that contains one or more BDOs, the developer of the BO is spared some work.

Throws:

Exception - If an error occurs.

createExisting

public static AreaBDO createExisting(AreaDO DO)

The createExisting method is used to create a AreaBDO from a AreaDO that was returned by the AreaQuery class.

getBDOarray

public static AreaBDO[] getBDOarray()
                             throws jobmatch.data.DataObjectException

The getBDOarray method performs a database query to return an array of AreaBDO objects representing all the rows in the Area table. This method is a minimal example of using a Query class. To restrict the set of objects returned, you could invoke query.setXxx(), where Xxx is an Attribute of AreaDO which was marked as "Can be queried" in the DODS Attribute Editor.

Throws:

jobmatch.data.DataObjectException - If an object is not found in the database.

beforeAnyGet

protected void beforeAnyGet()

The developer of a Business Object that derives from this class can override the methods: beforeAnyGet beforeAnySet afterAnySet to handle any general assertions or cleanup needed for get and set methods.

beforeAnySet

protected void beforeAnySet()
                     throws Exception

afterAnySet

protected void afterAnySet()

getHandle

public String getHandle()
                 throws jobmatch.data.DatabaseManagerException

The methods getHandle hasMatchingHandle are used by Presentation Objects that need to populate HTML select lists with AreaBDO objects as options. The getHandle() method is used to set the value for each option, and the hasMatchingHandle() methods are used to lookup the Data Object when the selection has been made. This AreaBDO object holds a reference to a AreaDO object. The id of this AreaBDO is the id of its AreaDO.

Returns:

id of this BDO as a string If an object id can't be allocated for this object.

Throws:

jobmatch.data.DatabaseManagerException - If a connection to the database cannot be established, etc.

hasMatchingHandle

public boolean hasMatchingHandle(String handle)

Parameters:

handle - String representation of the id for this BDO

Returns:

boolean True if the string version of the id of this DO matches passed handle

See Also:

getHandle

toString

public String toString()

for debugging

Overrides:

toString in class Object

getDescription

public String getDescription()
                      throws jobmatch.data.DataObjectException

Get Description of the AreaDO

Returns:

Description of the AreaDO

Throws:

jobmatch.data.DataObjectException - If the object is not found in the database.

setDescription

public void setDescription(String Description)
                    throws jobmatch.data.DataObjectException

Set Description of the AreaDO

Parameters:

Description - of the AreaDO

Throws:

jobmatch.data.DataObjectException - If the object is not found in the database.

commit

public void commit()
            throws SQLException,
                   jobmatch.data.DatabaseManagerException,
                   jobmatch.data.DataObjectException,
                   jobmatch.data.RefAssertionException,
                   jobmatch.data.DBRowUpdateException,
                   jobmatch.data.QueryException

Inserts/Updates the DO into its table.

Throws:

com.lutris.appserver.server.sql.DatabaseManagerException - if a Transaction can not be created.

jobmatch.data.RefAssertionException - thrown by okTo method.

SQLException - if any SQL errors occur.

commit

public void commit(jobmatch.data.DBTransaction dbt)
            throws SQLException,
                   jobmatch.data.DatabaseManagerException,
                   jobmatch.data.DataObjectException,
                   jobmatch.data.RefAssertionException,
                   jobmatch.data.DBRowUpdateException,
                   jobmatch.data.QueryException

Inserts/Updates the DO into its table. The transaction is likely provided by the commit() method of another BDO whose DO references this DO.

Parameters:

dbt - The transaction object to use for this operation.

Throws:

com.lutris.appserver.server.sql.DatabaseManagerException - if a Transaction can not be created.

jobmatch.data.RefAssertionException - thrown by okTo method.

SQLException - if any SQL errors occur.

delete

public void delete()
            throws SQLException,
                   jobmatch.data.DatabaseManagerException,
                   jobmatch.data.DataObjectException,
                   jobmatch.data.RefAssertionException,
                   jobmatch.data.DBRowUpdateException,
                   jobmatch.data.QueryException

Deletes the DO from its table.

Throws:

com.lutris.appserver.server.sql.DatabaseManagerException - if a Transaction can not be created.

jobmatch.data.RefAssertionException - thrown by okTo method.

SQLException - if any SQL errors occur.

delete

public void delete(jobmatch.data.DBTransaction dbt)
            throws SQLException,
                   jobmatch.data.DatabaseManagerException,
                   jobmatch.data.DataObjectException,
                   jobmatch.data.RefAssertionException,
                   jobmatch.data.DBRowUpdateException,
                   jobmatch.data.QueryException

Deletes the DO from its table. The transaction is likely provided by the delete() method of another BDO whose DO references this DO.

Parameters:

dbt - The transaction object to use for this operation.

Throws:

com.lutris.appserver.server.sql.DatabaseManagerException - if a Transaction can not be created.

jobmatch.data.RefAssertionException - thrown by okTo method.

SQLException - if any SQL errors occur.

modifyDO

protected void modifyDO(jobmatch.data.DBTransaction dbt,
                        boolean delete)
                 throws SQLException,
                        jobmatch.data.DatabaseManagerException,
                        jobmatch.data.DataObjectException,
                        jobmatch.data.RefAssertionException,
                        jobmatch.data.DBRowUpdateException,
                        jobmatch.data.QueryException

Modifies the DO within its table. Performs recursive commit/delete on referenced DOs; all operations occur within a single transaction to allow rollback in the event of error. Only the creator of the transaction releases it.

Parameters:

dbt - The transaction object to use for this operation.

delete - True if doing a delete, otherwise doing insert/update.

Throws:

com.lutris.appserver.server.sql.DatabaseManagerException - if a Transaction can not be created.

jobmatch.data.RefAssertionException - thrown by okTo method.

SQLException - if any SQL errors occur.