oracle.toplink.essentials.internal.ejb.cmp3.metadata.columns.MetadataJoinColumns Maven / Gradle / Ivy
/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* glassfish/bootstrap/legal/CDDLv1.0.txt or
* https://glassfish.dev.java.net/public/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
* add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your
* own identifying information: Portions Copyright [yyyy]
* [name of copyright owner]
*/
// Copyright (c) 1998, 2007, Oracle. All rights reserved.
package oracle.toplink.essentials.internal.ejb.cmp3.metadata.columns;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.JoinColumn;
import javax.persistence.JoinColumns;
import oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataDescriptor;
/**
* Object to hold onto join column metadata.
*
* @author Guy Pelletier
* @since TopLink EJB 3.0 Reference Implementation
*/
public class MetadataJoinColumns {
protected List m_joinColumns;
/**
* INTERNAL:
*/
public MetadataJoinColumns() {
m_joinColumns = new ArrayList();
}
/**
* INTERNAL:
*/
public MetadataJoinColumns(JoinColumns joinColumns, JoinColumn joinColumn) {
this();
// Process all the join columns first.
if (joinColumns != null) {
for (JoinColumn jColumn : joinColumns.value()) {
m_joinColumns.add(new MetadataJoinColumn(jColumn));
}
}
// Process the single key join column second.
if (joinColumn != null) {
m_joinColumns.add(new MetadataJoinColumn(joinColumn));
}
}
/**
* INTERNAL:
*/
public MetadataJoinColumns(JoinColumn[] joinColumns) {
this();
for (JoinColumn joinColumn : joinColumns) {
m_joinColumns.add(new MetadataJoinColumn(joinColumn));
}
}
/**
* INTERNAL:
*/
public boolean loadedFromXML() {
return false;
}
/**
* INTERNAL:
*/
public List values(MetadataDescriptor descriptor) {
// If no join columns are specified ...
if (m_joinColumns.isEmpty()) {
if (descriptor.hasCompositePrimaryKey()) {
// Add a default one for each part of the composite primary
// key. Foreign and primary key to have the same name.
for (String primaryKeyField : descriptor.getPrimaryKeyFieldNames()) {
m_joinColumns.add(new MetadataJoinColumn(primaryKeyField));
}
} else {
// Add a default one for the single case, not setting any
// foreign and primary key names. They will default based
// on which accessor is using them.
m_joinColumns.add(new MetadataJoinColumn());
}
}
return m_joinColumns;
}
}