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org.nuiton.topia.framework
Class TopiaQuery<E extends TopiaEntity>

java.lang.Object
  extended by org.nuiton.topia.framework.TopiaQuery<E>
Type Parameters:
E - The main entity for the query
public class TopiaQuery<E extends TopiaEntity>
extends Object

Query HQL managment to simplify usage of TopiaContext.find(java.lang.String, java.lang.Object[]). TODO-FD20091224 Complete documentation of this class + JUnit Tests 

 This class is used to construct a HQL query and then execute it from a TopiaContext. The TopiaQuery is linked to a TopiaEntity which
 is the main element manipulated in the query. There is two parts in using this class :
 - construction of the query, using add, addFrom, addOrder, addSelect, addGroup, ...
 - execution of the query, using executeToEntityList, executeToEntity, executeToInteger, ...

 Construction
 ============

 This class make easier the way to construct a HQL query.
 
 Example 1 :
 -----------

 SQL :
       "SELECT * FROM PersonImpl WHERE firstName LIKE 'M%' AND year > 1980"

 HQL using TopiaContext.find(java.lang.String, java.lang.Object[]) :
       TopiaContext context = rootContext.beginTransaction();
       context.find("FROM " + Person.class.getName() + " WHERE firstName LIKE :firstName AND year > :year",
              "firstName", "M%", year, 1980);

 TopiaQuery : 
       TopiaQuery query = TopiaQuery.createQuery(Person.class).add(Person.FIRST_NAME, Op.LIKE, "M%").add(Person.YEAR, Op.GT, 1980);

 But the real advantage is when you have some parameters to test before adding them to the query. With the older method, it was tidious to construct
 and add parameters to finally use the find method from TopiaContext.

 Example 2 :
 -----------

 HQL using TopiaContext.find(java.lang.String, java.lang.Object[]) :
       TopiaContext context = rootContext.beginTransaction();

       String query = "FROM " + Person.class.getName();
       List params = new ArrayList();
       boolean filtered = false;
       // company parameter can be null
       if (company != null) {
           query += " WHERE company = :company";
           params.add("company");
           params.add(company);
           filtered = true;
       }

       // contact paramater can be null
       if (contact != null) {
           query += filtered ? " AND " : " WHERE "
           query += " contact = :contact";
           params.add("contact");
           params.add(contact);
           filtered = true;
       }

       context.find(query, params.toArray());

 Here we have only two non obligatory params, but imagine if we must have almost 6 or 7 parameters like this !

 TopiaQuery :
       TopiaQuery query = TopiaQuery.createQuery(Person.class);

       if (company != null) {
           query.add(Person.COMPANY, company);
       }

       if (contact != null) {
           query.add(Person.CONTACT, contact);
       }

 Many ways to create the same query :
 ------------------------------------

 You can use multiple different manners to create a query, it depends on the complexicity. More complex is the query, more easier is to construct it.

 HQL : "FROM PersonImpl AS P WHERE (P.company IS NULL OR P.company = :company) AND P.firstName LIKE :firstName"

 Using TopiaQuery and an Alias :
 query = TopiaQuery.createQuery(Person.class, "P");
 1- query.add("(P.company IS NULL OR P.company = :company") AND P.firstName LIKE :firstName").addParam("company", company).addParam("firstName",firstName + "%");
 2- query.add("P.company IS NULL OR P.company = :company").add("P.firstName LIKE :firstName").addParam("company", company).addParam("firstName",firstName + "%");
 3- query.add("P.company IS NULL OR P.company = :company").add("P.firstName", Op.LIKE, firstName + "%").addParam("company", company);

 You can use TopiaQuery to create a subquery in an other TopiaQuery, you have to use the method fullQuery() to get the full query in HQL and give
 it as a string in the other TopiaQuery.

 Execution
 =========

 After construction, you can execute the query in different ways.

 Default method :
 ----------------

 - execute : as the same result as TopiaContext.find(java.lang.String, java.lang.Object[])

 Depends on entity type ;
 ------------------------

 - executeToEntity : only one result, the first one
 - executeToEntityList : all results returned in a List
 - executeToEntityMap : all results returned in a Map with key defined by user or topiaId by default

 For aggregate :
 ---------------

 These methods have in argument the SELECT to execute the query. The previous SELECT (if defined) will not be deleted, but temporarly not used.

 - executeToInteger : for example for "SUM", "COUNT"
 - executeToString : for example for "MAX"
 - executeCount : directly a "count(*)"
 - executeToObject : for other type of possible result (Long, Boolean, Double, ...)

 Property loading
 ================

 When using Hibernate, some times, Entities linked to the main one will be lazy initialized, but you want them directly when the
 query will be executed to avoid problems when closing context. You can use the method addLoad(java.lang.String[]) to
 tell the TopiaQuery to load some properties when executing the query. After that, you don't need to call them for loading them in Hibernate.

 The syntax is the same as a property in HQL query using delegation : "person.company" where person and company are entities.

 Note : loading only available on collection or entities but not property on a collection of entities which must be made manually.

 For a Contact which is linked to a person (entity) and the person linked to company (entity) you can add to a TopiaQuery :
       query.addLoad("person.company")

 For a list of addresses (entity) in the contact you can do :
       query.addLoad("addresses")

 But it's not possible to do for example with meeting (entity) linked to the contact and responsible (entity) linked to a meeting :
       query.addLoad("meetings.responsible")

 

 Created: 21 déc. 2009








Since:

  
2.3.0

 Mise a jour: $Date: 2010-01-20 11:40:14 +0100 (mer., 20 janv. 2010) $
 par : $Author$


Version:

  
$Revision: 1770 $


Author:

  
fdesbois
















Nested Class Summary





static class
TopiaQuery.Op



          Enum to simmplify using operation in query		




 







Field Summary





protected  TopiaDAO<E>
dao



           		





protected  boolean
distinct



           		





protected  Integer
endIndex



           		





protected  String
from



          From part of the query		





protected  String
groupBy



          Group By part of the query		





protected  String
mainAlias



           		





protected  Class<E>
mainEntityClass



           		





protected  String
orderBy



          Order By part of the query		





protected  List<Object>
params



          Params for HQL query		





protected  boolean
parentheses



          Used to determine if parentheses are needed for Where input		





protected  List<String>
propertiesToLoad



           		





protected  String
select



          Select part of the query		





protected  Integer
startIndex



           		





protected  String
where



          Where part of the query		




 








Constructor Summary





protected 
TopiaQuery(Class<E> entityClass)



           		





protected 
TopiaQuery(Class<E> entityClass,
           String alias)



           		





protected 
TopiaQuery(TopiaDAO<E> dao)



           		





protected 
TopiaQuery(TopiaDAO<E> dao,
           String alias)



           		




 








Method Summary





 TopiaQuery<E>
add(Map<String,Object> properties)



          Add a map of properties to the where clause of the query.		





 TopiaQuery<E>
add(String where)



          Add a where element to the Query.		





 TopiaQuery<E>
add(String paramName,
    Collection<Object> values)



          Add an element to the query with a list of different possible values.		





 TopiaQuery<E>
add(String paramName,
    Collection<Object> values,
    boolean isNull)



          Add an element to the query with a list of different values.		





 TopiaQuery<E>
add(String paramName,
    Object paramValue)



          Add an element to the query.		





 TopiaQuery<E>
add(String paramName,
    TopiaQuery.Op constraint,
    Object paramValue)



          Add an element to the query.		





 TopiaQuery<E>
addDistinct()



          Add the distinct key word in the query.		





 TopiaQuery<E>
addFrom(String str)



          Add an element to the from in the query.		





 TopiaQuery<E>
addGroup(String group)



          Add an element to the group of the query.		





 TopiaQuery<E>
addLoad(String... properties)



          Add a property to load when query is executed.		





 TopiaQuery<E>
addNotNull(String paramName)



          Add an element to the query with the constraint Not null.		





 TopiaQuery<E>
addOrder(String order)



          Add an element to the order in the query.		





 TopiaQuery<E>
addOrderDesc(String order)



           		





 TopiaQuery<E>
addParam(String id,
         Object paramValue)



          Add a HQL parameter to the Query.		





 TopiaQuery<E>
addSelect(String select)



          Add an element to the select in the query.		





static





<T extends TopiaEntity> 


TopiaQuery<T>		





createQuery(Class<T> entityClass)



          Create a TopiaQuery with entityClass initialization.		





static





<T extends TopiaEntity> 


TopiaQuery<T>		





createQuery(Class<T> entityClass,
            String alias)



          Create a TopiaQuery with entityClass initialization and its Alias.		





static





<T extends TopiaEntity> 


TopiaQuery<T>		





createQuery(TopiaDAO<T> dao)



          Create a TopiaQuery from a DAO.		





static





<T extends TopiaEntity> 


TopiaQuery<T>		





createQuery(TopiaDAO<T> dao,
            String alias)



          Create a TopiaQuery from a DAO with an Alias.		





 List
execute()



          DAO must be defined to use this method.		





 List
execute(TopiaContext transaction)



          Simple execution of the query.		





 int
executeCount()



          DAO must be defined to use this method.		





 int
executeCount(TopiaContext transaction)



          Execute a simple count on the query, i.e. the number of results get from the query.		





 E
executeToEntity()



          DAO must be defined to use this method.		





 E
executeToEntity(TopiaContext transaction)



          Execute the query and get the first result entity.		





 List<E>
executeToEntityList()



          DAO must be defined to use this method.		





 List<E>
executeToEntityList(TopiaContext transaction)



          Execute the query and get a List of entity.		





 Map<String,E>
executeToEntityMap()



          DAO must be defined to use this method.		











<K> Map<K,E>





executeToEntityMap(String keyName,
                   Class<K> keyClass)



          DAO must be defined to use this method.		





 Map<String,E>
executeToEntityMap(TopiaContext transaction)



          Execute the query and get a Map of entity with topiaId in key.		











<K> Map<K,E>





executeToEntityMap(TopiaContext transaction,
                   String keyName,
                   Class<K> keyClass)



          Execute the query and get a Map of entity with key type in argument.		





 int
executeToInteger(String select)



          DAO must be defined to use this method.		





 int
executeToInteger(TopiaContext transaction,
                 String select)



          Execute the query and get an Integer for result.		





 Object
executeToObject(String select)



          DAO must be defined to use this method.		





 Object
executeToObject(TopiaContext transaction,
                String select)



          Execute the query and get an Object for result.		





 String
executeToString(String select)



          DAO must be defined to use this method.		





 String
executeToString(TopiaContext transaction,
                String select)



          Execute the query and get a String for result.		





 String
fullQuery()



          Get the full query.		





 String
getMainAlias()



          Return the mainAlias set from constructor.		





protected  List<Object>
getParams()



           		





protected  List<String>
getPropertiesToLoad()



           		





protected  String
getValueName(String paramName)



           		





protected 





<T extends TopiaEntity> 


TopiaEntity		





loadEntityProperty(T entity,
                   String property)



          Load a property of type TopiaEntity from an other entity.		





protected 





<T extends TopiaEntity> 


void		





loadProperties(T entity)



          Load all properties for the entity.		





protected 





<T extends TopiaEntity> 


Object		





loadProperty(T entity,
             String property)



          Load a property from an entity.		





protected  void
resetLimit()



           		





 TopiaQuery<E>
setLimit(int start,
         int end)



          Limit the result of the query with startIndex and endIndex.		





 TopiaQuery<E>
setMaxResults(int max)



          Set the max results wanted for the query.		





 TopiaQuery<E>
setSelect(String select)



          Set the select in the query.		





 String
toString()



           		





protected  boolean
validateDAO()



           		




 




Methods inherited from class java.lang.Object




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




 











Field Detail







params


protected List<Object> params




Params for HQL query













select


protected String select




Select part of the query













distinct


protected boolean distinct














from


protected String from




From part of the query













where


protected String where




Where part of the query













orderBy


protected String orderBy




Order By part of the query













groupBy


protected String groupBy




Group By part of the query













startIndex


protected Integer startIndex














endIndex


protected Integer endIndex














parentheses


protected boolean parentheses




Used to determine if parentheses are needed for Where input













propertiesToLoad


protected List<String> propertiesToLoad














mainEntityClass


protected Class<E extends TopiaEntity> mainEntityClass














mainAlias


protected String mainAlias














dao


protected TopiaDAO<E extends TopiaEntity> dao


















Constructor Detail







TopiaQuery


protected TopiaQuery(Class<E> entityClass)










TopiaQuery


protected TopiaQuery(TopiaDAO<E> dao)










TopiaQuery


protected TopiaQuery(Class<E> entityClass,
                     String alias)










TopiaQuery


protected TopiaQuery(TopiaDAO<E> dao,
                     String alias)














Method Detail







createQuery


public static <T extends TopiaEntity> TopiaQuery<T> createQuery(Class<T> entityClass)




Create a TopiaQuery with entityClass initialization.





Type Parameters:
T - entity type extends TopiaEntity
Parameters:
entityClass - Class for an entity Query

Returns:
the new TopiaQuery










createQuery


public static <T extends TopiaEntity> TopiaQuery<T> createQuery(TopiaDAO<T> dao)




Create a TopiaQuery from a DAO.





Type Parameters:
T - entity type in the dao extends TopiaEntity
Parameters:
dao - DAO linked to the entity to threat

Returns:
the new TopiaQuery










createQuery


public static <T extends TopiaEntity> TopiaQuery<T> createQuery(Class<T> entityClass,
                                                                String alias)




Create a TopiaQuery with entityClass initialization and its Alias. The main entity will be automatically added to the select part of
 the query if it is needed.





Type Parameters:
T - entity type in the dao extends TopiaEntity
Parameters:
entityClass - Class for an entity Query
alias - of the main entity in the query

Returns:
the new TopiaQuery










createQuery


public static <T extends TopiaEntity> TopiaQuery<T> createQuery(TopiaDAO<T> dao,
                                                                String alias)




Create a TopiaQuery from a DAO with an Alias. The main entity will be automatically added to the select part of
 the query if it is needed.





Type Parameters:
T - entity type in the dao extends TopiaEntity
Parameters:
dao - DAO linked to the entity to threat
alias - of the main entity in the query

Returns:
the new TopiaQuery










toString


public String toString()






Overrides:
toString in class Object
















fullQuery


public String fullQuery()




Get the full query.






Returns:
a String corresponding to the full query.










addParam


public TopiaQuery<E> addParam(String id,
                              Object paramValue)




Add a HQL parameter to the Query.





Parameters:
id - identification of the param in the query
paramValue - value of the param

Returns:
the TopiaQuery










getParams


protected List<Object> getParams()
















getMainAlias


public String getMainAlias()




Return the mainAlias set from constructor.






Returns:
a String or null if no alias is set










addLoad


public TopiaQuery<E> addLoad(String... properties)




Add a property to load when query is executed.
 Used to avoid LazyInitializationException for property needed after closing context.
 The property is a string like those in HQL query.
 
 Exemples :
 - "person.company" (Property TopiaEntity person linked to the result entity in query and company linked to person)
   --> calling myEntity.getPerson().getCompany();
 - "partyRoles" (Property Collection partyRoles linked to the result entity in query)
   --> calling myEntity.getPartyRoles().size();
 






Parameters:
properties - 

Returns:
the TopiaQuery










getPropertiesToLoad


protected List<String> getPropertiesToLoad()
















add


public TopiaQuery<E> add(String where)




Add a where element to the Query. Could be anything.
 Parentheses are added automatically (even if there are not needed).





Parameters:
where - element to add

Returns:
the TopiaQuery










add


public TopiaQuery<E> add(String paramName,
                         TopiaQuery.Op constraint,
                         Object paramValue)




Add an element to the query. The parameter will be automatically added.
 The constraint is needed to determine what type of operation it is.
 Ex : add("boat", Op.EQ, boat) means -> boat = :boat.





Parameters:
paramName - the name of the parameter in the query (attribute of the entity)
constraint - the operation concerned
paramValue - the value of the parameter (an other entity, a String, ...)

Returns:
the TopiaQuery










getValueName


protected String getValueName(String paramName)
















addNotNull


public TopiaQuery<E> addNotNull(String paramName)




Add an element to the query with the constraint Not null.





Parameters:
paramName - name of the parameter in the query

Returns:
the TopiaQuery










add


public TopiaQuery<E> add(String paramName,
                         Object paramValue)




Add an element to the query. The parameter will be automatically added.
 The default constrainst operation is Op.EQ for EQUALS.
 Ex : add("boat", boat) means -> boat = :boat.





Parameters:
paramName - name of the parameter in the query
paramValue - value of the parameter

Returns:
the TopiaQuery
See Also:
add(String, TopiaQuery.Op, Object)










add


public TopiaQuery<E> add(String paramName,
                         Collection<Object> values)




Add an element to the query with a list of different possible values.





Parameters:
paramName - name of the parameter in the query
values - different values for this parameter

Returns:
the TopiaQuery
See Also:
add(java.lang.String, java.util.Collection, boolean)










add


public TopiaQuery<E> add(String paramName,
                         Collection<Object> values,
                         boolean isNull)




Add an element to the query with a list of different values. The IN key word will be used to
 set the different values. An other constraint on nullity can be set with isNull argument.
 The element can have one of the value from the collection or can be null if the isNull argument is true.





Parameters:
paramName - name of the parameter in the query
values - different values for this parameter
isNull - use it to test the nullity of parameter

Returns:
the TopiaQuery
See Also:
add(java.lang.String)










add


public TopiaQuery<E> add(Map<String,Object> properties)




Add a map of properties to the where clause of the query. Each property will be added to the query with
 Op.EQ operation, the key in the map is the property name, and the value is the value of the parameter in the
 query.





Parameters:
properties - 

Returns:
the TopiaQuery










addFrom


public TopiaQuery<E> addFrom(String str)




Add an element to the from in the query. Used to add some other data in the query or for join.





Parameters:
str - the element to add

Returns:
the TopiaQuery










addSelect


public TopiaQuery<E> addSelect(String select)




Add an element to the select in the query. Depends on the result wanted in execute methods. The main entity will be
 automatically added only if an alias is initialize from constructor. If you want only this select element, use setSelect(java.lang.String)
 method instead.





Parameters:
select - element to add

Returns:
the TopiaQuery










setSelect


public TopiaQuery<E> setSelect(String select)




Set the select in the query. Depends on the result wanted in execute methods.





Parameters:
select - element to set

Returns:
the TopiaQuery










addDistinct


public TopiaQuery<E> addDistinct()




Add the distinct key word in the query. The result will not have multiple same values.






Returns:
the TopiaQuery










addOrder


public TopiaQuery<E> addOrder(String order)




Add an element to the order in the query. Used to add some parameters to order by.





Parameters:
order - element to add

Returns:
the TopiaQuery










addOrderDesc


public TopiaQuery<E> addOrderDesc(String order)
















addGroup


public TopiaQuery<E> addGroup(String group)




Add an element to the group of the query. Used to add some paramters to group by.





Parameters:
group - element to add

Returns:
the TopiaQuery










setLimit


public TopiaQuery<E> setLimit(int start,
                              int end)




Limit the result of the query with startIndex and endIndex.





Parameters:
start - first index to get from the results
end - last index to get from the results

Returns:
the TopiaQuery










resetLimit


protected void resetLimit()
















setMaxResults


public TopiaQuery<E> setMaxResults(int max)




Set the max results wanted for the query.





Parameters:
max - the number of elements wanted

Returns:
the TopiaQuery










execute


public List execute(TopiaContext transaction)
             throws TopiaException




Simple execution of the query. This method use directly the find method in TopiaContext interface.





Parameters:
transaction - the TopiaContext to use for execution

Returns:
a List of results

Throws:

TopiaException
See Also:
TopiaContext.find(java.lang.String, java.lang.Object[])










execute


public List execute()
             throws TopiaException




DAO must be defined to use this method.






Returns:
a List of results

Throws:

TopiaException
See Also:
execute(org.nuiton.topia.TopiaContext)










executeToEntityList


public List<E> executeToEntityList(TopiaContext transaction)
                                                throws TopiaException,
                                                       ClassCastException




Execute the query and get a List of entity. Some properties will be loaded if they are 
 prealably set using $addLoad(java.lang.String[]).





Parameters:
transaction - the TopiaContext to use for execution

Returns:
a List of TopiaEntity corresponding to the entityClass in argument

Throws:

TopiaException

ClassCastException










executeToEntityList


public List<E> executeToEntityList()
                                                throws TopiaException,
                                                       ClassCastException




DAO must be defined to use this method.






Returns:
a List of TopiaEntity corresponding to the entityClass in argument

Throws:

TopiaException

ClassCastException
See Also:
executeToEntityList(org.nuiton.topia.TopiaContext)










executeToEntityMap


public <K> Map<K,E> executeToEntityMap(TopiaContext transaction,
                                       String keyName,
                                       Class<K> keyClass)
                                                throws TopiaException,
                                                       ClassCastException




Execute the query and get a Map of entity with key type in argument. Some properties will be loaded if they are
 prealably set using $addLoad(java.lang.String[]).





Type Parameters:
K - the type of the map key
Parameters:
transaction - the TopiaContext to use for execution
keyName - the property name of the key in the entity
keyClass - the key class for the result map

Returns:
a Map with the key type defined and the entity in value

Throws:

TopiaException

ClassCastException










executeToEntityMap


public <K> Map<K,E> executeToEntityMap(String keyName,
                                       Class<K> keyClass)
                                                throws TopiaException,
                                                       ClassCastException




DAO must be defined to use this method.





Type Parameters:
K - 
Parameters:
keyName - 
keyClass - 

Returns:
a Map with the key type defined and the entity in value

Throws:

TopiaException

ClassCastException
See Also:
executeToEntityMap(org.nuiton.topia.TopiaContext, java.lang.String, java.lang.Class)










executeToEntityMap


public Map<String,E> executeToEntityMap(TopiaContext transaction)
                                                     throws TopiaException,
                                                            ClassCastException




Execute the query and get a Map of entity with topiaId in key. Some properties will be loaded if they are
 prealably set using $addLoad(java.lang.String[]).





Parameters:
transaction - the TopiaContext to use for execution

Returns:
a Map with the key type defined and the entity in value

Throws:

TopiaException

ClassCastException










executeToEntityMap


public Map<String,E> executeToEntityMap()
                                                     throws TopiaException,
                                                            ClassCastException




DAO must be defined to use this method.






Returns:
a Map with the key type defined and the entity in value

Throws:

TopiaException

ClassCastException
See Also:
executeToEntityMap(org.nuiton.topia.TopiaContext)










executeToEntity


public E executeToEntity(TopiaContext transaction)
                                      throws TopiaException,
                                             ClassCastException




Execute the query and get the first result entity. Some properties will be loaded if they are
 prealably set using $addLoad(java.lang.String[]).





Parameters:
transaction - the TopiaContext to use for execution

Returns:
a TopiaEntity corresponding  to the entityClass in argument

Throws:

TopiaException

ClassCastException










executeToEntity


public E executeToEntity()
                                      throws TopiaException,
                                             ClassCastException




DAO must be defined to use this method.






Returns:
a TopiaEntity corresponding  to the entityClass in argument

Throws:

TopiaException

ClassCastException
See Also:
executeToEntity(org.nuiton.topia.TopiaContext)










executeToInteger


public int executeToInteger(TopiaContext transaction,
                            String select)
                     throws TopiaException




Execute the query and get an Integer for result. Used for query with COUNT or SUM, ...
 The select is overriden to get only the right value for return.





Parameters:
transaction - the TopiaContext to use for execution
select - the Select overriden (ex : SUM(myParam))

Returns:
an Integer

Throws:

TopiaException










executeToInteger


public int executeToInteger(String select)
                     throws TopiaException




DAO must be defined to use this method.





Parameters:
select - 

Returns:
an Integer

Throws:

TopiaException
See Also:
executeToInteger(org.nuiton.topia.TopiaContext, java.lang.String)










executeToString


public String executeToString(TopiaContext transaction,
                              String select)
                       throws TopiaException




Execute the query and get a String for result. Used for query with MAX, ...
 The select is overriden to get only the right value for return.





Parameters:
transaction - the TopiaContext to use for execution
select - the Select overriden (ex : MAX(myParam))

Returns:
a String

Throws:

TopiaException










executeToString


public String executeToString(String select)
                       throws TopiaException




DAO must be defined to use this method.





Parameters:
select - 

Returns:
a String result

Throws:

TopiaException
See Also:
executeToString(org.nuiton.topia.TopiaContext, java.lang.String)










executeToObject


public Object executeToObject(TopiaContext transaction,
                              String select)
                       throws TopiaException




Execute the query and get an Object for result.
 The select is overriden to get only the right value for return.





Parameters:
transaction - the TopiaContext to use for execution
select - the Select overriden

Returns:
an Object

Throws:

TopiaException










executeToObject


public Object executeToObject(String select)
                       throws TopiaException




DAO must be defined to use this method.





Parameters:
select - 

Returns:
an Object

Throws:

TopiaException
See Also:
executeToObject(org.nuiton.topia.TopiaContext, java.lang.String)










executeCount


public int executeCount(TopiaContext transaction)
                 throws TopiaException




Execute a simple count on the query, i.e. the number of results get from the query.





Parameters:
transaction - the TopiaContext to use for execution

Returns:
an int corresponding to the number of result in the query

Throws:

TopiaException










executeCount


public int executeCount()
                 throws TopiaException




DAO must be defined to use this method.






Returns:
an int corresponding to the number of result in the query

Throws:

TopiaException
See Also:
executeCount(org.nuiton.topia.TopiaContext)










validateDAO


protected boolean validateDAO()
                       throws TopiaException







Throws:

TopiaException










loadProperties


protected <T extends TopiaEntity> void loadProperties(T entity)
                       throws TopiaException




Load all properties for the entity.





Type Parameters:
T - type of the entity extends TopiaEntity
Parameters:
entity - used to load properties

Throws:

TopiaException










loadEntityProperty


protected <T extends TopiaEntity> TopiaEntity loadEntityProperty(T entity,
                                                                 String property)
                                  throws TopiaException




Load a property of type TopiaEntity from an other entity.





Type Parameters:
T - type of the entity extends TopiaEntity
Parameters:
entity - used to load the property
property - name of the property in the entity

Returns:
a TopiaEntity corresponding to the property loaded

Throws:

TopiaException










loadProperty


protected <T extends TopiaEntity> Object loadProperty(T entity,
                                                      String property)
                       throws TopiaException




Load a property from an entity.





Type Parameters:
T - type of the entity extends TopiaEntity
Parameters:
entity - used to load the property
property - name of the property in the entity

Returns:
an Object corresponding to the property loaded

Throws:

TopiaException





















  

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