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package oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors;
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.internal.ejb.cmp3.metadata.columns.MetadataJoinColumn;
import oracle.toplink.essentials.internal.ejb.cmp3.metadata.columns.MetadataPrimaryKeyJoinColumn;
import oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataDescriptor;
import oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataLogger;
import oracle.toplink.essentials.internal.helper.DatabaseField;
import oracle.toplink.essentials.internal.indirection.WeavedObjectBasicIndirectionPolicy;
import oracle.toplink.essentials.mappings.OneToOneMapping;
import java.util.List;
/**
* A single object relationship accessor.
*
* @author Guy Pelletier
* @since TopLink EJB 3.0 Reference Implementation
*/
public abstract class ObjectAccessor extends RelationshipAccessor {
protected ObjectAccessor(MetadataAccessibleObject accessibleObject, ClassAccessor classAccessor) {
super(accessibleObject, classAccessor);
}
/**
* INTERNAL: (Override from MetadataAccessor)
*
* If a target entity is specified in metadata, it will be set as the
* reference class, otherwise we will use the raw class.
*/
public Class getReferenceClass() {
if (m_referenceClass == null) {
m_referenceClass = getTargetEntity();
if (m_referenceClass == void.class) {
// Get the reference class from the accessible object and
// log the defaulting contextual reference class.
m_referenceClass = super.getReferenceClass();
m_logger.logConfigMessage(getLoggingContext(), getAnnotatedElement(), m_referenceClass);
}
}
return m_referenceClass;
}
/**
* INTERNAL:
* Initialize a OneToOneMapping.
*/
protected OneToOneMapping initOneToOneMapping() {
OneToOneMapping mapping = new OneToOneMapping();
mapping.setIsReadOnly(false);
mapping.setIsPrivateOwned(false);
mapping.setIsOptional(isOptional());
mapping.setAttributeName(getAttributeName());
mapping.setReferenceClassName(getReferenceClassName());
// If the global weave for value holders is true, the use the value
// from usesIndirection. Otherwise, force it to false.
boolean usesIndirection = (m_project.enableLazyForOneToOne()) ? usesIndirection() : false;
if (usesIndirection && m_descriptor.usesPropertyAccess()) {
mapping.setIndirectionPolicy(new WeavedObjectBasicIndirectionPolicy(getSetMethodName()));
} else {
mapping.setUsesIndirection(usesIndirection);
}
// Set the getter and setter methods if access is PROPERTY.
setAccessorMethods(mapping);
// Process the cascade types.
processCascadeTypes(mapping);
return mapping;
}
/**
* INTERNAL:
* Process the @JoinColumn(s) for the owning side of a one to one mapping.
* The default pk and pk field names are used only with single primary key
* entities. The processor should never get as far as to use them with
* entities that have a composite primary key (validation exception will be
* thrown).
*/
protected void processOneToOneForeignKeyRelationship(OneToOneMapping mapping) {
// If the pk field (referencedColumnName) is not specified, it
// defaults to the primary key of the referenced table.
String defaultPKFieldName = getReferenceDescriptor().getPrimaryKeyFieldName();
// If the fk field (name) is not specified, it defaults to the
// concatenation of the following: the name of the referencing
// relationship property or field of the referencing entity; "_";
// the name of the referenced primary key column.
String defaultFKFieldName = getUpperCaseAttributeName() + "_" + defaultPKFieldName;
// Join columns will come from a @JoinColumn(s).
List<MetadataJoinColumn> joinColumns = processJoinColumns();
// Add the source foreign key fields to the mapping.
for (MetadataJoinColumn joinColumn : joinColumns) {
DatabaseField pkField = joinColumn.getPrimaryKeyField();
pkField.setName(getName(pkField, defaultPKFieldName, MetadataLogger.PK_COLUMN));
pkField.setTableName(getReferenceDescriptor().getPrimaryKeyTableName());
DatabaseField fkField = joinColumn.getForeignKeyField();
fkField.setName(getName(fkField, defaultFKFieldName, MetadataLogger.FK_COLUMN));
// Set the table name if one is not already set.
if (fkField.getTableName().equals("")) {
fkField.setTableName(m_descriptor.getPrimaryTableName());
}
// Add a source foreign key to the mapping.
mapping.addForeignKeyField(fkField, pkField);
// If any of the join columns is marked read-only then set the
// mapping to be read only.
if (fkField.isReadOnly()) {
mapping.setIsReadOnly(true);
}
}
}
/**
* INTERNAL:
* Process the primary key join columns for the owning side of a one to one
* mapping. The default pk and pk field names are used only with single
* primary key entities. The processor should never get as far as to use
* them with entities that have a composite primary key (validation
* exception will be thrown).
*/
protected void processOneToOnePrimaryKeyRelationship(OneToOneMapping mapping) {
// Join columns will come from a @PrimaryKeyJoinColumn(s).
MetadataDescriptor referenceDescriptor = getReferenceDescriptor();
List<MetadataPrimaryKeyJoinColumn> primaryKeyJoinColumns = processPrimaryKeyJoinColumns(getPrimaryKeyJoinColumns(referenceDescriptor.getPrimaryTableName(), m_descriptor.getPrimaryTableName()));
// Add the source foreign key fields to the mapping.
for (MetadataPrimaryKeyJoinColumn primaryKeyJoinColumn : primaryKeyJoinColumns) {
// The default primary key name is the primary key field name of the
// referenced entity.
DatabaseField pkField = primaryKeyJoinColumn.getPrimaryKeyField();
pkField.setName(getName(pkField, referenceDescriptor.getPrimaryKeyFieldName(), m_logger.PK_COLUMN));
// The default foreign key name is the primary key of the
// referencing entity.
DatabaseField fkField = primaryKeyJoinColumn.getForeignKeyField();
fkField.setName(getName(fkField, m_descriptor.getPrimaryKeyFieldName(), m_logger.FK_COLUMN));
// Add a source foreign key to the mapping.
mapping.addForeignKeyField(fkField, pkField);
// Mark the mapping read only
mapping.setIsReadOnly(true);
}
}
/**
* INTERNAL:
* Process the the correct metadata join column for the owning side of a
* one to one mapping.
*/
protected void processOwningMappingKeys(OneToOneMapping mapping) {
if (isOneToOnePrimaryKeyRelationship()) {
processOneToOnePrimaryKeyRelationship(mapping);
} else {
processOneToOneForeignKeyRelationship(mapping);
}
}
}
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