/*
* Copyright (c) 2008, 2009 Sun Microsystems. 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 2.0 - Version 2.0 (October 1, 2009)
* Specification available from http://jcp.org/en/jsr/detail?id=317
*/
// $Id: $
package javax.persistence.metamodel;
/**
* Instances of the type <code>SingularAttribute</code> represents persistent
* single-valued properties or fields.
*
* @param <X> The type containing the represented attribute
* @param <T> The type of the represented attribute
* @since Java Persistence 2.0
*/
public interface SingularAttribute<X, T> extends Attribute<X, T>, Bindable<T> {
/**
* Is the attribute an id attribute. This method will return
* true if the attribute is an attribute that corresponds to
* a simple id, an embedded id, or an attribute of an id class.
*
* @return boolean indicating whether the attribute is an id
*/
boolean isId();
/**
* Is the attribute a version attribute.
*
* @return boolean indicating whether the attribute is
* a version attribute
*/
boolean isVersion();
/**
* Can the attribute be null.
*
* @return boolean indicating whether the attribute can
* be null
*/
boolean isOptional();
/**
* Return the type that represents the type of the attribute.
*
* @return type of attribute
*/
Type<T> getType();
}