Package org.springframework.data.repository.query.parser

Class AbstractQueryCreator<T,S>

java.lang.Object

org.springframework.data.repository.query.parser.AbstractQueryCreator<T,S>

Type Parameters:

T - the actual query type to be created

S - the intermediate criteria type

public abstract class AbstractQueryCreator<T,S>
extends Object

Base class for query creators that create criteria based queries from a PartTree.

Author:

Oliver Gierke, Mark Paluch, Christoph Strobl, Johannes Englmeier

Constructor Summary

Constructors

Constructor	Description
AbstractQueryCreator(PartTree tree)	Creates a new AbstractQueryCreator for the given PartTree.
AbstractQueryCreator(PartTree tree, ParameterAccessor parameters)	Creates a new AbstractQueryCreator for the given PartTree and ParametersParameterAccessor.

Method Summary

Modifier and Type	Method	Description
protected abstract S	and(Part part, S base, Iterator<Object> iterator)	Creates a new criteria object from the given part and and-concatenates it to the given base criteria.
protected abstract T	complete(S criteria, Sort sort)	Actually creates the query object applying the given criteria object and Sort definition.
protected abstract S	create(Part part, Iterator<Object> iterator)	Creates a new atomic instance of the criteria object.
T	createQuery()	Creates the actual query object.
T	createQuery(Sort dynamicSort)	Creates the actual query object applying the given Sort parameter.
protected abstract S	or(S base, S criteria)	Or-concatenates the given base criteria to the given new criteria.

Methods inherited from class java.lang.Object

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

Constructor Details

AbstractQueryCreator

public AbstractQueryCreator(PartTree tree)

Creates a new AbstractQueryCreator for the given PartTree. This will cause null be handed for the Iterator in the callback methods.

Parameters:

tree - must not be null.

Since:

2.0

AbstractQueryCreator

public AbstractQueryCreator(PartTree tree,
 ParameterAccessor parameters)

Creates a new AbstractQueryCreator for the given PartTree and ParametersParameterAccessor. The latter is used to hand actual parameter values into the callback methods as well as to apply dynamic sorting via a Sort parameter.

Parameters:

tree - must not be null.

parameters - must not be null.

Method Details

createQuery

public T createQuery()

Creates the actual query object.

Returns:

createQuery

public T createQuery(Sort dynamicSort)

Creates the actual query object applying the given Sort parameter. Use this method in case you haven't provided a ParameterAccessor in the first place but want to apply dynamic sorting nevertheless.

Parameters:

dynamicSort - must not be null.

Returns:

create

protected abstract S create(Part part,
 Iterator<Object> iterator)

Creates a new atomic instance of the criteria object.

Parameters:

part - must not be null.

iterator - must not be null.

Returns:

and

protected abstract S and(Part part,
 S base,
 Iterator<Object> iterator)

Creates a new criteria object from the given part and and-concatenates it to the given base criteria.

Parameters:

part - must not be null.

base - will never be null.

iterator - must not be null.

Returns:

or

protected abstract S or(S base,
 S criteria)

Or-concatenates the given base criteria to the given new criteria.

Parameters:

base - must not be null.

criteria - must not be null.

Returns:

complete

protected abstract T complete(@Nullable
 S criteria,
 Sort sort)

Actually creates the query object applying the given criteria object and Sort definition.

Parameters:

criteria - can be null.

sort - must not be null.

Returns: