org.dellroad.querystream.jpa.querytype

Class QueryType<X,C extends CommonAbstractCriteria,C2 extends C,Q extends Query>

java.lang.Object

org.dellroad.querystream.jpa.querytype.QueryType<X,C,C2,Q>

Type Parameters:

X - query result/target type

C - configured criteria API query type

C2 - final criteria API query type

Q - final JPA query type

Direct Known Subclasses:

DeleteType, SearchType, UpdateType

public abstract class QueryType<X,C extends CommonAbstractCriteria,C2 extends C,Q extends Query>
extends Object

Instances represent one of the three types of JPA criteria API queries: search, update, or delete, for a specific target type.

Field Summary

Fields

Modifier and Type	Field and Description
protected Class<X>	type

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	QueryType(Class<X> type) Constructor.

Method Summary

Modifier and Type	Method and Description
abstract C2	createCriteriaQuery(CriteriaBuilder builder) Create a new Criteria API query object of the appropriate type.
abstract Q	createQuery(EntityManager entityManager, C2 query) Create a JPA query object of the appropriate type.
Class<X>	getType() Get the query result/target type associated with this instance.
abstract void	where(C query, Expression<Boolean> restriction) Configure the restriction associated with the given query.
abstract void	where(C query, Predicate restriction) Configure the restriction associated with the given query.

Methods inherited from class java.lang.Object

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

Field Detail

type

protected final Class<X> type

Constructor Detail

QueryType

protected QueryType(Class<X> type)

Constructor.

Parameters:

type - query result/target type

Throws:

IllegalArgumentException - if type is null

Method Detail

getType

public Class<X> getType()

Get the query result/target type associated with this instance.

Returns:

query result/target type

createCriteriaQuery

public abstract C2 createCriteriaQuery(CriteriaBuilder builder)

Create a new Criteria API query object of the appropriate type.

Parameters:

builder - criteria builder

Returns:

new criteria query object

Throws:

IllegalArgumentException - if builder is null

createQuery

public abstract Q createQuery(EntityManager entityManager,
                              C2 query)

Create a JPA query object of the appropriate type.

Parameters:

entityManager - JPA entity manager

query - criteria query object

Returns:

new executable JPA query object

Throws:

IllegalArgumentException - if entityManager or query is null

where

public abstract void where(C query,
                           Expression<Boolean> restriction)

Configure the restriction associated with the given query.

Parameters:

query - criteria query object

restriction - query restriction

Throws:

IllegalArgumentException - if query or expression is null

where

public abstract void where(C query,
                           Predicate restriction)

Configure the restriction associated with the given query.

Parameters:

query - criteria query object

restriction - query restriction

Throws:

IllegalArgumentException - if query or expression is null