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package oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors;
import java.util.List;
import javax.persistence.ManyToOne;
import oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataLogger;
import oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.ClassAccessor;
import oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.objects.MetadataAccessibleObject;
import oracle.toplink.essentials.mappings.OneToOneMapping;
/**
* A many to one relationship accessor.
*
* @author Guy Pelletier
* @since TopLink EJB 3.0 Reference Implementation
*/
public class ManyToOneAccessor extends ObjectAccessor {
private ManyToOne m_manyToOne;
/**
* INTERNAL:
*/
public ManyToOneAccessor(MetadataAccessibleObject accessibleObject, ClassAccessor classAccessor) {
super(accessibleObject, classAccessor);
m_manyToOne = getAnnotation(ManyToOne.class);
}
/**
* INTERNAL: (Overridden in XMLManyToOneAccessor)
*/
public List<String> getCascadeTypes() {
return getCascadeTypes(m_manyToOne.cascade());
}
/**
* INTERNAL: (Overridden in XMLManyToOneAccessor)
*/
public String getFetchType() {
return m_manyToOne.fetch().name();
}
/**
* INTERNAL:
*
* Return the logging context for this accessor.
*/
protected String getLoggingContext() {
return m_logger.MANY_TO_ONE_MAPPING_REFERENCE_CLASS;
}
/**
* INTERNAL: (Overridden in XMLManyToOneAccessor)
*/
public Class getTargetEntity() {
return m_manyToOne.targetEntity();
}
/**
* INTERNAL:
*/
public boolean isManyToOne() {
return true;
}
/**
* INTERNAL: (Overridden in XMLManyToOneAccessor)
*/
public boolean isOptional() {
return m_manyToOne.optional();
}
/**
* INTERNAL:
* Process a @ManyToOne or many-to-one element into a TopLink OneToOne
* mapping.
*/
public void process() {
// Initialize our mapping now with what we found.
OneToOneMapping mapping = initOneToOneMapping();
// Now process the JoinColumns (if there are any) for this mapping.
processOwningMappingKeys(mapping);
// Add the mapping to the descriptor.
m_descriptor.addMapping(mapping);
}
}