/*******************************************************************************
* Copyright (c) 2011 - 2013 Oracle Corporation. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Linda DeMichiel - Java Persistence 2.1
*
******************************************************************************/
package javax.persistence;
import javax.persistence.metamodel.
Attribute;
import java.util.
List;
/**
* This type represents the root of an entity graph that will be used
* as a template to define the attribute nodes and boundaries of a
* graph of entities and entity relationships. The root must be an
* entity type.
* <p>
* The methods to add subgraphs implicitly create the
* corresponding attribute nodes as well; such attribute nodes
* should not be redundantly specified.
*
* @param <T> The type of the root entity.
*
* @see AttributeNode
* @see Subgraph
* @see NamedEntityGraph
*
* @since Java Persistence 2.1
*/
public interface
EntityGraph<T> {
/**
* Return the name of a named EntityGraph (an entity graph
* defined by means of the <code>NamedEntityGraph</code>
* annotation, XML descriptor element, or added by means of the
* <code>addNamedEntityGraph</code> method. Returns null if the
* EntityGraph is not a named EntityGraph.
*/
public
String getName();
/**
* Add one or more attribute nodes to the entity graph.
*
* @param attributeName name of the attribute
* @throws IllegalArgumentException if the attribute is not an
* attribute of this entity.
* @throws IllegalStateException if the EntityGraph has been
* statically defined
*/
public void
addAttributeNodes(
String ...
attributeName);
/**
* Add one or more attribute nodes to the entity graph.
*
* @param attribute attribute
* @throws IllegalStateException if the EntityGraph has been
* statically defined
*/
public void
addAttributeNodes(
Attribute<T, ?> ...
attribute);
/**
* Add a node to the graph that corresponds to a managed
* type. This allows for construction of multi-node entity graphs
* that include related managed types.
*
* @param attribute attribute
* @return subgraph for the attribute
* @throws IllegalArgumentException if the attribute's target type
* is not a managed type
* @throws IllegalStateException if the EntityGraph has been
* statically defined
*/
public <X>
Subgraph<X>
addSubgraph(
Attribute<T, X>
attribute);
/**
* Add a node to the graph that corresponds to a managed
* type with inheritance. This allows for multiple subclass
* subgraphs to be defined for this node of the entity
* graph. Subclass subgraphs will automatically include the
* specified attributes of superclass subgraphs.
*
* @param attribute attribute
* @param type entity subclass
* @return subgraph for the attribute
* @throws IllegalArgumentException if the attribute's target
* type is not a managed type
* @throws IllegalStateException if the EntityGraph has been
* statically defined
*/
public <X>
Subgraph<? extends X>
addSubgraph(
Attribute<T, X>
attribute,
Class<? extends X>
type);
/**
* Add a node to the graph that corresponds to a managed
* type. This allows for construction of multi-node entity graphs
* that include related managed types.
*
* @param attributeName name of the attribute
* @return subgraph for the attribute
* @throws IllegalArgumentException if the attribute is not an
* attribute of this entity.
* @throws IllegalArgumentException if the attribute's target type
* is not a managed type
* @throws IllegalStateException if the EntityGraph has been
* statically defined
*/
public <X>
Subgraph<X>
addSubgraph(
String attributeName);
/**
* Add a node to the graph that corresponds to a managed
* type with inheritance. This allows for multiple subclass
* subgraphs to be defined for this node of the entity graph.
* Subclass subgraphs will automatically include the specified
* attributes of superclass subgraphs.
*
* @param attributeName name of the attribute
* @param type entity subclass
* @return subgraph for the attribute
* @throws IllegalArgumentException if the attribute is not an
* attribute of this managed type.
* @throws IllegalArgumentException if the attribute's target type
* is not a managed type
* @throws IllegalStateException if this EntityGraph has been
* statically defined
*/
public <X>
Subgraph<X>
addSubgraph(
String attributeName,
Class<X>
type);
/**
* Add a node to the graph that corresponds to a map key
* that is a managed type. This allows for construction of
* multi-node entity graphs that include related managed types.
*
* @param attribute attribute
* @return subgraph for the key attribute
* @throws IllegalArgumentException if the attribute's target type
* is not an entity
* @throws IllegalStateException if this EntityGraph has been
* statically defined
*/
public <X>
Subgraph<X>
addKeySubgraph(
Attribute<T, X>
attribute);
/**
* Add a node to the graph that corresponds to a map key
* that is a managed type with inheritance. This allows for
* construction of multi-node entity graphs that include related
* managed types. Subclass subgraphs will include the specified
* attributes of superclass subgraphs.
*
* @param attribute attribute
* @param type entity subclass
* @return subgraph for the key attribute
* @throws IllegalArgumentException if the attribute's target type
* is not an entity
* @throws IllegalStateException if this EntityGraph has been
* statically defined
*/
public <X>
Subgraph<? extends X>
addKeySubgraph(
Attribute<T, X>
attribute,
Class<? extends X>
type);
/**
* Add a node to the graph that corresponds to a map key
* that is a managed type. This allows for construction of
* multi-node entity graphs that include related managed types.
*
* @param attributeName name of the attribute
* @return subgraph for the key attribute
* @throws IllegalArgumentException if the attribute is not an
* attribute of this entity.
* @throws IllegalArgumentException if the attribute's target type
* is not an entity
* @throws IllegalStateException if this EntityGraph has been
* statically defined
*/
public <X>
Subgraph<X>
addKeySubgraph(
String attributeName);
/**
* Add a node to the graph that corresponds to a map key
* that is a managed type with inheritance. This allows for
* construction of multi-node entity graphs that include related
* managed types. Subclass subgraphs will automatically include
* the specified attributes of superclass subgraphs
*
* @param attributeName name of the attribute
* @param type entity subclass
* @return subgraph for the key attribute
* @throws IllegalArgumentException if the attribute is not an
* attribute of this entity.
* @throws IllegalArgumentException if the attribute's target type
* is not a managed type
* @throws IllegalStateException if this EntityGraph has been
* statically defined
*/
public <X>
Subgraph<X>
addKeySubgraph(
String attributeName,
Class<X>
type);
/**
* Add additional attributes to this entity graph that
* correspond to attributes of subclasses of this EntityGraph's
* entity type. Subclass subgraphs will automatically include the
* specified attributes of superclass subgraphs.
*
* @param type entity subclass
* @return subgraph for the subclass
* @throws IllegalArgumentException if the type is not an entity type
* @throws IllegalStateException if the EntityGraph has been
* statically defined
*/
public <T>
Subgraph<? extends T>
addSubclassSubgraph(
Class<? extends T>
type);
/**
* Return the attribute nodes of this entity that are included in
* the entity graph.
* @return attribute nodes for the annotated entity type or empty
* list if none have been defined
*/
public
List<
AttributeNode<?>>
getAttributeNodes();
}