Package org.springframework.data.repository.query

Class QueryMethod

java.lang.Object

org.springframework.data.repository.query.QueryMethod

public class QueryMethod
extends Object

Abstraction of a method that is designated to execute a finder query. Enriches the standard Method interface with specific information that is necessary to construct RepositoryQuerys for the method.

Author:

Oliver Gierke, Thomas Darimont, Christoph Strobl, Maciek Opała, Mark Paluch, Johannes Englmeier

Constructor Summary

Constructors

Constructor	Description
QueryMethod(Method method, RepositoryMetadata metadata, ProjectionFactory factory)	Creates a new QueryMethod from the given parameters.

Method Summary

Modifier and Type	Method	Description
protected Parameters<?,?>	createParameters(Method method)	Creates a Parameters instance.
protected Class<?>	getDomainClass()	Returns the domain class the query method is targeted at.
EntityMetadata<?>	getEntityInformation()
String	getName()	Returns the method's name.
String	getNamedQueryName()	Returns the name of the named query this method belongs to.
Parameters<?,?>	getParameters()	Returns the Parameters wrapper to gain additional information about Method parameters.
ResultProcessor	getResultProcessor()	Returns the ResultProcessor to be used with the query method.
Class<?>	getReturnedObjectType()	Returns the type of the object that will be returned.
boolean	isCollectionQuery()	Returns whether the finder will actually return a collection of entities or a single one.
boolean	isModifyingQuery()	Returns whether the query method is a modifying one.
final boolean	isPageQuery()	Returns whether the finder will return a Page of results.
boolean	isQueryForEntity()	Returns whether the query for this method actually returns entities.
boolean	isSliceQuery()	Returns whether the query method will return a Slice.
boolean	isStreamQuery()	Returns whether the method returns a Stream.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

QueryMethod

public QueryMethod(Method method,
 RepositoryMetadata metadata,
 ProjectionFactory factory)

Creates a new QueryMethod from the given parameters. Looks up the correct query to use for following invocations of the method given.

Parameters:

method - must not be null.

metadata - must not be null.

factory - must not be null.

Method Details

createParameters

protected Parameters<?,?> createParameters(Method method)

Creates a Parameters instance.

Parameters:

method -

Returns:

must not return null.

getName

public String getName()

Returns the method's name.

Returns:

getEntityInformation

public EntityMetadata<?> getEntityInformation()

getNamedQueryName

public String getNamedQueryName()

Returns the name of the named query this method belongs to.

Returns:

getDomainClass

protected Class<?> getDomainClass()

Returns the domain class the query method is targeted at.

Returns:

will never be null.

getReturnedObjectType

public Class<?> getReturnedObjectType()

Returns the type of the object that will be returned.

Returns:

isCollectionQuery

public boolean isCollectionQuery()

Returns whether the finder will actually return a collection of entities or a single one.

Returns:

isSliceQuery

public boolean isSliceQuery()

Returns whether the query method will return a Slice.

Returns:

Since:

1.8

isPageQuery

public final boolean isPageQuery()

Returns whether the finder will return a Page of results.

Returns:

isModifyingQuery

public boolean isModifyingQuery()

Returns whether the query method is a modifying one.

Returns:

isQueryForEntity

public boolean isQueryForEntity()

Returns whether the query for this method actually returns entities.

Returns:

isStreamQuery

public boolean isStreamQuery()

Returns whether the method returns a Stream.

Returns:

Since:

1.10

getParameters

public Parameters<?,?> getParameters()

Returns the Parameters wrapper to gain additional information about Method parameters.

Returns:

getResultProcessor

public ResultProcessor getResultProcessor()

Returns the ResultProcessor to be used with the query method.

Returns:

the resultFactory

toString

public String toString()

Overrides:

toString in class Object