/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.metamodel.internal;

import java.io.Serializable;
import java.lang.reflect.Member;
import javax.persistence.metamodel.SingularAttribute;
import javax.persistence.metamodel.Type;

/**
 * @author Emmanuel Bernard
 * @author Steve Ebersole
 */
public class SingularAttributeImpl<X, Y>
		extends AbstractAttribute<X,Y>
		implements SingularAttribute<X, Y>, Serializable {
	private final boolean isIdentifier;
	private final boolean isVersion;
	private final boolean isOptional;
	private final Type<Y> attributeType;

	public SingularAttributeImpl(
			String name,
			Class<Y> javaType,
			AbstractManagedType<X> declaringType,
			Member member,
			boolean isIdentifier,
			boolean isVersion,
			boolean isOptional,
			Type<Y> attributeType,
			PersistentAttributeType persistentAttributeType) {
		super( name, javaType, declaringType, member, persistentAttributeType );
		this.isIdentifier = isIdentifier;
		this.isVersion = isVersion;
		this.isOptional = isOptional;
		this.attributeType = attributeType;
	}

	/**
	 * Subclass used to simply instantiation of singular attributes representing an entity's
	 * identifier.
	 */
	public static class Identifier<X,Y> extends SingularAttributeImpl<X,Y> {
		public Identifier(
				String name,
				Class<Y> javaType,
				AbstractManagedType<X> declaringType,
				Member member,
				Type<Y> attributeType,
				PersistentAttributeType persistentAttributeType) {
			super( name, javaType, declaringType, member, true, false, false, attributeType, persistentAttributeType );
		}
	}

	/**
	 * Subclass used to simply instantiation of singular attributes representing an entity's
	 * version.
	 */
	public static class Version<X,Y> extends SingularAttributeImpl<X,Y> {
		public Version(
				String name,
				Class<Y> javaType,
				AbstractManagedType<X> declaringType,
				Member member,
				Type<Y> attributeType,
				PersistentAttributeType persistentAttributeType) {
			super( name, javaType, declaringType, member, false, true, false, attributeType, persistentAttributeType );
		}
	}

	@Override
	public boolean isId() {
		return isIdentifier;
	}

	@Override
	public boolean isVersion() {
		return isVersion;
	}

	@Override
	public boolean isOptional() {
		return isOptional;
	}

	@Override
	public Type<Y> getType() {
		return attributeType;
	}

	@Override
	public boolean isAssociation() {
		return getPersistentAttributeType() == PersistentAttributeType.MANY_TO_ONE
				|| getPersistentAttributeType() == PersistentAttributeType.ONE_TO_ONE;
	}

	@Override
	public boolean isCollection() {
		return false;
	}

	@Override
	public BindableType getBindableType() {
		return BindableType.SINGULAR_ATTRIBUTE;
	}

	@Override
	public Class<Y> getBindableJavaType() {
		return attributeType.getJavaType();
	}
}