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 /*
  * 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 SingularAttribute represents persistent single-valued properties or fields.

Parameters:
<X> The type containing the represented attribute
<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.

Returns:
boolean indicating whether the attribute is an id
	boolean isId();

Is the attribute a version attribute.

Returns:
boolean indicating whether the attribute is a version attribute
	boolean isVersion();

Can the attribute be null.

Returns:
boolean indicating whether the attribute can be null
	boolean isOptional();

Return the type that represents the type of the attribute.

Returns:
type of attribute
	Type<T> getType();
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