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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 java.util.HashMap;
import java.util.Map;
import org.eclipse.jpt.jpa.core.context.AttributeMapping;
import org.eclipse.jpt.jpa.core.context.TypeMapping;
import org.eclipse.persistence.jpa.jpql.spi.IManagedType;
import org.eclipse.persistence.jpa.jpql.spi.IMapping;
import org.eclipse.persistence.jpa.jpql.spi.IMappingBuilder;
import org.eclipse.persistence.jpa.jpql.spi.IType;
import org.eclipse.persistence.jpa.jpql.util.iterator.CloneIterator;
import org.eclipse.persistence.jpa.jpql.util.iterator.IterableIterator;
/**
* The abstract definition of {@link IManagedType} defined for wrapping the design-time mapped class
* object.
*
* 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 abstract class JpaManagedType implements IManagedType {
/**
* The design-time model object wrapped by this class.
*/
private final TypeMapping managedType;
/**
* The builder that is responsible to create the {@link IMapping} wrapping a persistent attribute
* or property.
*/
private IMappingBuilder<AttributeMapping> mappingBuilder;
/**
* The cached collection of {@link IMapping mappings} that prevent rebuilding them every time one
* is requested.
*/
private Map<String, IMapping> mappings;
/**
* The provider of JPA managed types.
*/
private final JpaManagedTypeProvider provider;
/**
* The cached type of this managed type.
*/
private IType type;
/**
* Creates a new <code>JDeveloperManagedType</code>.
*
* @param managedType The provider of JPA managed types
* @param mappedClass The design-time model object wrapped by this class
* @param mappingBuilder The builder that is responsible to create the {@link IMapping} wrapping
* a persistent attribute or property
*/
protected JpaManagedType(JpaManagedTypeProvider provider,
TypeMapping managedType,
IMappingBuilder<AttributeMapping> mappingBuilder) {
super();
this.provider = provider;
this.managedType = managedType;
this.mappingBuilder = mappingBuilder;
}
/**
* Creates the external form that needs to wrap the given {@link AttributeMapping}. By default,
* the call is delegated to {@link IMappingBuilder}.
*
* @param mapping The mapping to wrap with a {@link IMapping}
* @return A new concrete instance of {@link IMapping}
*/
protected IMapping buildMapping(AttributeMapping mapping) {
return mappingBuilder.buildMapping(this, mapping);
}
/**
* Creates an external form for each {@link AttributeMapping} and stores them by using their
* mapping name.
*
* @return The mappings mapped by their name
*/
protected Map<String, IMapping> buildMappings() {
Map<String, IMapping> mappings = new HashMap<String, IMapping>();
for (AttributeMapping mapping : managedType.getAllAttributeMappings()) {
mappings.put(mapping.getName(), buildMapping(mapping));
}
return mappings;
}
/**
* {@inheritDoc}
*/
public int compareTo(IManagedType managedType) {
return getType().getName().compareTo(managedType.getType().getName());
}
/**
* Returns the encapsulated model object.
*
* @return The managed type wrapped by this external form
*/
protected TypeMapping getManagedType() {
return managedType;
}
/**
* Returns the builder that is responsible to create the {@link IMapping} wrapping a persistent
* attribute or property.
*
* @return The concrete implementation of {@link IMappingBuilder}
*/
protected IMappingBuilder<AttributeMapping> getMappingBuilder() {
return mappingBuilder;
}
/**
* {@inheritDoc}
*/
public IMapping getMappingNamed(String name) {
initializeMappings();
return mappings.get(name);
}
/**
* {@inheritDoc}
*/
public JpaManagedTypeProvider getProvider() {
return provider;
}
/**
* {@inheritDoc}
*/
public IType getType() {
if (type == null) {
type = provider.getTypeRepository().getType(managedType.getPersistentType().getName());
}
return type;
}
/**
* Initializes this managed type.
*/
protected void initializeMappings() {
if (mappings == null) {
mappings = buildMappings();
}
}
/**
* {@inheritDoc}
*/
public IterableIterator<IMapping> mappings() {
initializeMappings();
return new CloneIterator<IMapping>(mappings.values());
}
}
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