edu.wright.hendrix11.familyTree.dataBean

Class DataBean<E,K>

java.lang.Object

edu.wright.hendrix11.familyTree.dataBean.DataBean<E,K>

Type Parameters:

E - a class that has an @Entity annotation

K - the key for that class, which will have the @Id annotation in the associated {@link Entity

Direct Known Subclasses:

PersonDataBean

public class DataBean<E,K>
extends Object

Author:

Joe Hendrix

Field Summary

Fields

Modifier and Type	Field and Description
static int	RECORDS_PER_PAGE

Constructor Summary

Constructors

Constructor and Description
DataBean()

Method Summary

Modifier and Type	Method and Description
void	delete(E e)
E	find(K key) Returns the entity associated with the primary key.
int	getNumPages() Returns the number of pages available.
int	getPage() Returns the page number.
String	getSort() Returns the current sort String.
void	initialize(Class<E> clazz) This method should be called before any other method is called.
List<E>	list() Returns a list of the entities.
K	save(E e)
void	setPage(int page) Sets the page number.
void	setSort(String sort) Sets the sort String.
void	update(E e)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

RECORDS_PER_PAGE

public static final int RECORDS_PER_PAGE

See Also:

Constant Field Values

Constructor Detail

DataBean

public DataBean()

Method Detail

initialize

public void initialize(Class<E> clazz)

This method should be called before any other method is called. The reason this method is provided rather than simply using a constructor is that JPA will inject it into another class via the @EJB annotation using a no-argument constructor.

The Class object must be the same type specified by E. This class must have both an {@link Entity

Parameters:

clazz - a Class object of the same type specified by E

Throws:

IllegalArgumentException - if the class clazz does not have an @Entity annotation or field public static final String FIND_ALL

getSort

public String getSort()

Returns the current sort String.

The sort string is actually a query of sorts (pun intended?) where, when list() is called, is sorted in a way where the string is seperated into a string array by the period (".") character, and then the query result is sorted by the first element of the string array, then the next element, and so on.

Returns:

the current sort String

setSort

public void setSort(String sort)

Sets the sort String.

The sort string is actually a query of sorts (pun intended?) where, when list() is called, is sorted in a way where the string is seperated into a string array by the period (".") character, and then the query result is sorted by the first element of the string array, then the next element, and so on.

Parameters:

sort - the sort String

getPage

public int getPage()

Returns the page number.

Returns:

the page number

setPage

public void setPage(int page)

Sets the page number.

Parameters:

page - the page number

getNumPages

public int getNumPages()

Returns the number of pages available. This is calculated by taking the ceiling os the size of the result list divided by RECORDS_PER_PAGE, where RECORDS_PER_PAGE is currently set to 50.

Returns:

the number of pages available

list

public List<E> list()

Returns a list of the entities. This list is at most the size of RECORDS_PER_PAGE, which is currently set to 50.

Returns:

a list of entities

find

public E find(K key)

Returns the entity associated with the primary key.

Parameters:

key - the primary key

Returns:

the entity with the given primary key

save

public K save(E e)

Parameters:

e -

Returns:

update

public void update(E e)

Parameters:

e -

delete

public void delete(E e)

Parameters:

e -