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/*
* FieldGroupElementImpl.java
*
* Created on March 2, 2000, 6:28 PM
*/
package com.sun.jdo.api.persistence.model.jdo.impl;
import com.sun.jdo.api.persistence.model.ModelException;
import com.sun.jdo.api.persistence.model.jdo.FieldGroupElement;
import com.sun.jdo.api.persistence.model.jdo.PersistenceFieldElement;
/**
*
* @author raccah
* @version %I%
*/
public class FieldGroupElementImpl extends PersistenceMemberElementImpl
implements FieldGroupElement.Impl
{
/** Fields of the field group element. */
private PersistenceElementCollection _fields;
/** Create new FieldGroupElementImpl with no corresponding name. This
* constructor should only be used for cloning and archiving.
*/
public FieldGroupElementImpl ()
{
this(null);
}
/** Creates new FieldGroupElementImpl with the corresponding name
* @param name the name of the element
*/
public FieldGroupElementImpl (String name)
{
super(name);
_fields = new PersistenceElementCollection(this, PROP_FIELDS,
new PersistenceFieldElement[0]);
}
/** Find a field by name.
* @param name the name to match
* @return the field, or <code>null</code> if it does not exist
*/
public PersistenceFieldElement getField (String name)
{
return (PersistenceFieldElement)_fields.getElement(name);
}
/** Get all fields.
* @return the fields
*/
public PersistenceFieldElement[] getFields ()
{
return (PersistenceFieldElement[])_fields.getElements();
}
/** Change the set of fields.
* @param fields the new fields
* @param action {@link #ADD}, {@link #REMOVE}, or {@link #SET}
* @exception ModelException if impossible
*/
public void changeFields (PersistenceFieldElement[] fields, int action)
throws ModelException
{
_fields.changeElements(fields, action);
}
//=============== extra methods needed for xml archiver ==============
/** Returns the field collection of this field group element. This
* method should only be used internally and for cloning and archiving.
* @return the field collection of this field group element
*/
public PersistenceElementCollection getCollection () { return _fields; }
/** Set the field collection of this field group element to the supplied
* collection. This method should only be used internally and for
* cloning and archiving.
* @param collection the field collection of this field group element
*/
public void setCollection (PersistenceElementCollection collection)
{
_fields = collection;
}
}