com.haulmont.cuba.core.app

Interface DataService

All Known Subinterfaces:

DataSupplier

All Known Implementing Classes:

DataServiceBean, GenericDataSupplier

public interface DataService

Middleware service interface to provide CRUD functionality.

Implementation delegates to DataManager

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	NAME

Method Summary

Modifier and Type	Method and Description
java.util.Set<Entity>	commit(CommitContext context) Commits a collection of new or detached entity instances to the database.
long	getCount(LoadContext<? extends Entity> context) Returns the number of entity instances for the given query passed in the LoadContext.
<E extends Entity> E	load(LoadContext<E> context) Loads a single entity instance.
<E extends Entity> java.util.List<E>	loadList(LoadContext<E> context) Loads collection of entity instances.
java.util.List<KeyValueEntity>	loadValues(ValueLoadContext context)

Field Detail

NAME

static final java.lang.String NAME

See Also:

Constant Field Values

Method Detail

commit

java.util.Set<Entity> commit(CommitContext context)

Commits a collection of new or detached entity instances to the database.

Parameters:

context - CommitContext object, containing committing entities and other information

Returns:

set of committed instances

load

@Nullable
<E extends Entity> E load(LoadContext<E> context)

Loads a single entity instance.

The depth of object graphs, starting from loaded instances, defined by View object passed in LoadContext.

Parameters:

context - LoadContext object, defining what and how to load

Returns:

the loaded detached object, or null if not found

loadList

<E extends Entity> java.util.List<E> loadList(LoadContext<E> context)

Loads collection of entity instances.

The depth of object graphs, starting from loaded instances, defined by View object passed in LoadContext.

Parameters:

context - LoadContext object, defining what and how to load

Returns:

a list of detached instances, or empty list if nothing found

getCount

long getCount(LoadContext<? extends Entity> context)

Returns the number of entity instances for the given query passed in the LoadContext.

Parameters:

context - defines the query

Returns:

number of instances in the database

loadValues

java.util.List<KeyValueEntity> loadValues(ValueLoadContext context)