/*******************************************************************************
* Copyright (c) 2006, 2013 Oracle and/or its affiliates. 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.persistence.jpa.jpql;
import org.eclipse.persistence.jpa.jpql.spi.IManagedType;
import org.eclipse.persistence.jpa.jpql.spi.IType;
import org.eclipse.persistence.jpa.jpql.spi.ITypeDeclaration;
/**
* This {@link Resolver} retrieves the type for an abstract schema name (entity name).
*
* @version 2.4
* @since 2.3
* @author Pascal Filion
*/
public class EntityResolver extends Resolver {
/**
* The abstract schema name is the name of the entity.
*/
private final String abstractSchemaName;
/**
* The {@link IManagedType} with the same abstract schema name.
*/
private IManagedType managedType;
/**
* Creates a new <code>EntityResolver</code>.
*
* @param parent The parent {@link Resolver}, which is never <code>null</code>
* @param abstractSchemaName The name of the entity
*/
public EntityResolver(Resolver parent, String abstractSchemaName) {
super(parent);
this.abstractSchemaName = abstractSchemaName;
}
/**
* {@inheritDoc}
*/
@Override
public void accept(ResolverVisitor visitor) {
visitor.visit(this);
}
/**
* {@inheritDoc}
*/
@Override
protected IType buildType() {
IManagedType entity = getManagedType();
return (entity != null) ? entity.getType() : getTypeHelper().objectType();
}
/**
* {@inheritDoc}
*/
@Override
protected ITypeDeclaration buildTypeDeclaration() {
return getType().getTypeDeclaration();
}
/**
* Returns the name of the entity to resolve.
*
* @return The entity name, which is never <code>null</code>
*/
public String getAbstractSchemaName() {
return abstractSchemaName;
}
/**
* {@inheritDoc}
*/
@Override
public IManagedType getManagedType() {
if (managedType == null) {
managedType = getProvider().getEntityNamed(abstractSchemaName);
}
return managedType;
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
return abstractSchemaName;
}
}