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/*******************************************************************************
* Copyright (c) 2011 Oracle. 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:
* Oracle - initial API and implementation
*
******************************************************************************/
package org.eclipse.jpt.jpa.core.jpql.spi;
import org.eclipse.jpt.jpa.core.context.TypeMapping;
import org.eclipse.persistence.jpa.jpql.spi.IManagedType;
import org.eclipse.persistence.jpa.jpql.spi.IManagedTypeProvider;
import org.eclipse.persistence.jpa.jpql.spi.IManagedTypeVisitor;
import org.eclipse.persistence.jpa.jpql.spi.IMapping;
import org.eclipse.persistence.jpa.jpql.spi.IType;
import org.eclipse.persistence.jpa.jpql.util.iterator.IterableIterator;
import org.eclipse.persistence.jpa.jpql.util.iterator.NullIterator;
/**
* The concrete implementation of {@link IManagedType} that is wrapping the design-time
* representation a "null" managed type.
*
* Provisional API: This interface is part of an interim API that is still under development and
* expected to change significantly before reaching stability. It is available at this early stage
* to solicit feedback from pioneering adopters on the understanding that any code that uses this
* API will almost certainly be broken (repeatedly) as the API evolves.
*
* @version 3.1
* @since 3.0
* @author Pascal Filion
*/
public class JpaNullManagedType implements IManagedType {
/**
* The provider of JPA managed types.
*/
private final JpaManagedTypeProvider provider;
/**
* The cached {@link IType} of this "null" managed type.
*/
private IType type;
/**
* The design-time model object wrapped by this class.
*/
private final TypeMapping typeMapping;
/**
* Creates a new <code>JpaNullManagedType</code>.
*
* @param managedType The provider of JPA managed types
* @param typeMapping The design-time model object wrapped by this class
*/
public JpaNullManagedType(JpaManagedTypeProvider provider, TypeMapping typeMapping) {
super();
this.provider = provider;
this.typeMapping = typeMapping;
}
/**
* {@inheritDoc}
*/
public void accept(IManagedTypeVisitor visitor) {
}
/**
* {@inheritDoc}
*/
public int compareTo(IManagedType managedType) {
return getType().getName().compareTo(managedType.getType().getName());
}
/**
* {@inheritDoc}
*/
public IMapping getMappingNamed(String name) {
return null;
}
/**
* {@inheritDoc}
*/
public IManagedTypeProvider getProvider() {
return provider;
}
/**
* {@inheritDoc}
*/
public IType getType() {
if (type == null) {
type = provider.getTypeRepository().getType(typeMapping.getPersistentType().getName());
}
return type;
}
/**
* {@inheritDoc}
*/
public IterableIterator<IMapping> mappings() {
return NullIterator.instance();
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
return getType().getName();
}
}
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