org.hdpagination.dataaccess.orm.jpa
Class JPAQueryTemplate

java.lang.Object
  org.hdpagination.dataaccess.orm.jpa.JPAQueryTemplate

All Implemented Interfaces:

QueryTemplate

public class JPAQueryTemplate
extends java.lang.Object
implements QueryTemplate

The type of QueryTemplate to run a pagination based query against JPA.

Since:

1.0

Author:

Liangfeng Ren

Constructor Summary

JPAQueryTemplate(javax.persistence.EntityManagerFactory emFactory)

Method Summary

int	countRows(QueryCallback callback) query total number of records for this search
java.util.List	query(QueryCallback callback, int pageSize, int pageNo) execute query and return only one page of data

Methods inherited from class java.lang.Object

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

Constructor Detail

JPAQueryTemplate

public JPAQueryTemplate(javax.persistence.EntityManagerFactory emFactory)

Parameters:

emFactory -

Method Detail

query

public java.util.List query(QueryCallback callback,
                            int pageSize,
                            int pageNo)

Description copied from interface: QueryTemplate

execute query and return only one page of data

Specified by:

query in interface QueryTemplate

pageSize - number of records per page

pageNo - index of current page,index begins with 0.

Returns:

countRows

public int countRows(QueryCallback callback)

Description copied from interface: QueryTemplate

query total number of records for this search

Specified by:

countRows in interface QueryTemplate

Returns: