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/*
* MappingRelationshipElementImpl.java
*
* Created on March 3, 2000, 1:11 PM
*/
package com.sun.jdo.api.persistence.model.mapping.impl;
import java.util.*;
import java.beans.PropertyVetoException;
import org.netbeans.modules.dbschema.*;
import org.netbeans.modules.dbschema.util.NameUtil;
import com.sun.jdo.api.persistence.model.ModelException;
import com.sun.jdo.api.persistence.model.ModelVetoException;
import com.sun.jdo.api.persistence.model.mapping.*;
import com.sun.jdo.api.persistence.model.jdo.RelationshipElement;
import com.sun.jdo.spi.persistence.utility.I18NHelper;
/**
*
* @author Mark Munro
* @author Rochelle Raccah
* @version %I%
*/
public class MappingRelationshipElementImpl extends MappingFieldElementImpl
implements MappingRelationshipElement
{
// for join tables -- traverse through the middle table
private ArrayList _associatedColumns; // of column pair names
//@olsen: made transient to prevent from serializing into mapping files
private transient ArrayList _associatedColumnObjects;// of ColumnPairElement (for runtime)
/*
// possibly for EJB use later
// private String EJBType;
// public String EJBReference;
// end possibly for EJB use later
*/
/** Create new MappingRelationshipElementImpl with no corresponding name or
* declaring class. This constructor should only be used for cloning and
* archiving.
*/
public MappingRelationshipElementImpl ()
{
this(null, null);
}
/** Create new MappingRelationshipElementImpl with the corresponding name
* and declaring class.
* @param name the name of the element
* @param declaringClass the class to attach to
*/
public MappingRelationshipElementImpl (String name,
MappingClassElement declaringClass)
{
super(name, declaringClass);
setFetchGroupInternal(GROUP_NONE);
}
// TBD?
/* public void clear ()
{
super.clear();
_associatedColumns = null;
}*/
// end TBD
//=================== column handling for join tables ====================
/** Returns the list of associated column names to which this
* mapping field is mapped. This is used for join tables.
* @return the names of the columns mapped by this mapping field
* @see MappingFieldElement#getColumns
*/
public ArrayList getAssociatedColumns ()
{
if (_associatedColumns == null)
_associatedColumns = new ArrayList();
return _associatedColumns;
}
/** Adds a column to the list of columns mapped by this mapping field.
* Call this method instead of <code>addColumn</code> when mapping join
* tables. This method is used to map between the local column and the
* join table, while <code>addAssociatedColumn</code> is used to
* map between the join table and the foreign table.
* @param column column pair element to be added to the mapping
* @exception ModelException if impossible
* @see MappingFieldElement#addColumn
* @see #addAssociatedColumn
*/
public void addLocalColumn (ColumnPairElement column)
throws ModelException
{
// can't call addColumn in this class because there will be an
// exception since the associated columns will be (legally) populated
super.addColumn(column);
}
/** Adds a column to the list of associated columns mapped by this mapping
* field. Call this method instead of <code>addColumn</code> when mapping
* join tables. This method is used to map between the join table column
* and the foreign table column, while <code>addLocalColumn</code> is used
* to map between the local table and the join table.
* @param column column pair element to be added to the mapping
* @exception ModelException if impossible
* @see MappingFieldElement#addColumn
* @see #addLocalColumn
*/
public void addAssociatedColumn (ColumnPairElement column)
throws ModelException
{
if (column != null)
{
ArrayList columns = getAssociatedColumns();
String columnName = NameUtil.getRelativeMemberName(
column.getName().getFullName());
// double check that this pair is not already in the column list
if (!columns.contains(columnName))
{
try
{
fireVetoableChange(PROP_ASSOCIATED_COLUMNS, null, null);
columns.add(columnName);
firePropertyChange(PROP_ASSOCIATED_COLUMNS, null, null);
// sync up runtime's object list too
_associatedColumnObjects = null;
}
catch (PropertyVetoException e)
{
throw new ModelVetoException(e);
}
}
else
{
throw new ModelException(I18NHelper.getMessage(getMessages(),
"mapping.column.column_defined", columnName)); // NOI18N
}
}
else
{
throw new ModelException(I18NHelper.getMessage(getMessages(),
"mapping.element.null_argument")); // NOI18N
}
}
//================= overridden column handling methods ===================
/** Adds a column to the list of columns mapped by this mapping
* relationship. This method overrides the one in MappingFieldElement to
* check that the argument is a ColumnPairElement.
* @param column column element to be added to the mapping
* @exception ModelException if impossible
*/
public void addColumn (DBMemberElement column) throws ModelException
{
if (column instanceof ColumnPairElement)
{
if (!getAssociatedColumns().isEmpty())
{
throw new ModelException(I18NHelper.getMessage(getMessages(),
"mapping.column.associated_columns_defined", // NOI18N
NameUtil.getRelativeMemberName(
column.getName().getFullName())));
}
super.addColumn(column);
}
else
{
throw new ModelException(I18NHelper.getMessage(getMessages(),
"mapping.column.column_invalid", // NOI18N
NameUtil.getRelativeMemberName(
column.getName().getFullName())));
}
}
/** Removes a column from the list of columns mapped by this mapping field.
* This method overrides the one in MappingFieldElement to
* remove the argument from the associated columns if necessary.
* @param columnName the relative name of the column to be removed from
* the mapping
* @exception ModelException if impossible
*/
public void removeColumn (String columnName) throws ModelException
{
try
{
super.removeColumn(columnName);
}
catch (ModelException e) // not found in regular columns
{
try
{
fireVetoableChange(PROP_ASSOCIATED_COLUMNS, null, null);
if (!getAssociatedColumns().remove(columnName))
{
throw new ModelException(
I18NHelper.getMessage(getMessages(),
"mapping.element.element_not_removed", // NOI18N
columnName));
}
firePropertyChange(PROP_ASSOCIATED_COLUMNS, null, null);
// sync up runtime's object list too
_associatedColumnObjects = null;
}
catch (PropertyVetoException ve)
{
throw new ModelVetoException(ve);
}
}
}
//============= extra object support for runtime ========================
/** Returns the list of associated columns (ColumnPairElements) to
* which this mapping field is mapped. This is used for join tables.
* This method should only be used by the runtime.
* @return the columns mapped by this mapping field
* @see MappingFieldElement#getColumns
*/
public ArrayList getAssociatedColumnObjects ()
{
if (_associatedColumnObjects == null)
{
_associatedColumnObjects = MappingClassElementImpl.
toColumnObjects(getDeclaringClass().getDatabaseRoot(),
getAssociatedColumns());
}
return _associatedColumnObjects;
}
//============= delegation to RelationshipElement ===========
final RelationshipElement getRelationshipElement ()
{
return ((MappingClassElementImpl)getDeclaringClass()).
getPersistenceElement().getRelationship(getName());
}
/** Get the element class for this relationship element. If primitive
* types are supported, you can use <code><i>wrapperclass</i>.TYPE</code>
* to specify them.
* @return the element class
*/
public String getElementClass ()
{
return getRelationshipElement().getElementClass();
}
/** Get the update action for this relationship element.
* @return the update action, one of
* {@link RelationshipElement#NONE_ACTION},
* {@link RelationshipElement#NULLIFY_ACTION},
* {@link RelationshipElement#RESTRICT_ACTION},
* {@link RelationshipElement#CASCADE_ACTION}, or
* {@link RelationshipElement#AGGREGATE_ACTION}
*/
public int getUpdateAction ()
{
return getRelationshipElement().getUpdateAction();
}
/** Get the delete action for this relationship element.
* @return the delete action, one of
* {@link RelationshipElement#NONE_ACTION},
* {@link RelationshipElement#NULLIFY_ACTION},
* {@link RelationshipElement#RESTRICT_ACTION},
* {@link RelationshipElement#CASCADE_ACTION}, or
* {@link RelationshipElement#AGGREGATE_ACTION}
*/
public int getDeleteAction ()
{
return getRelationshipElement().getDeleteAction();
}
/** Get the upper cardinality bound for this relationship element. Returns
* {@link java.lang.Integer#MAX_VALUE} for <code>n</code>
* @return the upper cardinality bound
*/
public int getUpperBound ()
{
return getRelationshipElement().getUpperBound();
}
/** Get the lower cardinality bound for this relationship element.
* @return the lower cardinality bound
*/
public int getLowerBound ()
{
return getRelationshipElement().getLowerBound();
}
//=============== extra set methods needed for xml archiver ==============
/** Set the list of associated column names to which this mapping field is
* mapped. This method should only be used internally and for cloning
* and archiving.
* @param associatedColumns the list of names of the columns mapped by
* this mapping field
*/
public void setAssociatedColumns (ArrayList associatedColumns)
{
_associatedColumns = associatedColumns;
}
//================== possibly for EJB use later ===========================
//public String getEJBType() { return this.EJBType; }
//============== extra method for Boston -> Pilsen conversion ============
/** Boston to Pilsen conversion.
* This method converts the absolute column names to relative names.
*/
protected void stripSchemaName ()
{
// call super to handle the columns stored in _columns
super.stripSchemaName();
// handle _associatedColumns
if (_associatedColumns != null)
{
// Use ListIterator here, because I want to replace the value
// stored in the ArrayList. The ListIterator returned by
// ArrayList.listIterator() supports the set method.
ListIterator i = _associatedColumns.listIterator();
while (i.hasNext())
i.set(NameUtil.getRelativeMemberName((String)i.next()));
}
}
}
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