//$Header: /home/deegree/jail/deegreerepository/deegree/src/org/deegree/io/datastore/sql/transaction/Attic/TableReference.java,v 1.4 2006/09/26 16:45:45 mschneider Exp $
/*---------------- FILE HEADER ------------------------------------------
This file is part of deegree.
Copyright (C) 2001-2006 by:
Department of Geography, University of Bonn
http://www.giub.uni-bonn.de/deegree/
lat/lon GmbH
http://www.lat-lon.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Contact:
Andreas Poth
lat/lon GmbH
Aennchenstraße 19
53177 Bonn
Germany
E-Mail: poth@lat-lon.de
Prof. Dr. Klaus Greve
Department of Geography
University of Bonn
Meckenheimer Allee 166
53115 Bonn
Germany
E-Mail: greve@giub.uni-bonn.de
---------------------------------------------------------------------------*/
package org.deegree.io.datastore.sql.transaction;
import org.deegree.io.datastore.schema.TableRelation;
import org.deegree.io.datastore.schema.TableRelation.FK_INFO;
import org.deegree.io.datastore.schema.content.MappingField;
/**
* Represents a reference from a table to another table. This corresponds to a
* {@link TableRelation} declaration from an annotated GML schema, but with unambigious direction:
* the source (from) table contains the foreign key.
*
* @author <a href="mailto:schneider@lat-lon.de">Markus Schneider </a>
* @author last edited by: $Author: mschneider $
*
* @version $Revision: 1.4 $, $Date: 2006/09/26 16:45:45 $
*/
class TableReference {
private String fromTable;
private String toTable;
private MappingField[] fkColumns;
private MappingField[] keyColumns;
/**
* Creates a new <code>TableReference</code> instance from the given {@link TableRelation}.
*
* @param relation
*/
TableReference( TableRelation relation ) {
if ( relation.getFKInfo() == FK_INFO.fkIsFromField ) {
this.fromTable = relation.getFromTable();
this.fkColumns = relation.getFromFields();
this.toTable = relation.getToTable();
this.keyColumns = relation.getToFields();
} else if ( relation.getFKInfo() == FK_INFO.fkIsToField ) {
this.fromTable = relation.getToTable();
this.fkColumns = relation.getToFields();
this.toTable = relation.getFromTable();
this.keyColumns = relation.getFromFields();
} else {
throw new IllegalArgumentException( "Cannot create TableReference without "
+ "fk (foreign key) information: " + relation );
}
}
/**
* Returns the columns that build the foreign key (in the 'from' table).
*
* @return the columns that build the foreign key (in the 'from' table)
*/
MappingField[] getFkColumns() {
return this.fkColumns;
}
/**
* Returns the name of the 'from' table.
*
* @return the name of the 'from' table
*/
String getFromTable() {
return this.fromTable;
}
/**
* Returns the columns that build the key (in the 'to' table).
*
* @return the columns that build the key (in the 'to' table)
*/
MappingField[] getKeyColumns() {
return this.keyColumns;
}
/**
* Returns the name of the 'to' table.
*
* @return the name of the 'to' table
*/
String getToTable() {
return this.toTable;
}
/**
* Returns a string representation of the object.
*
* @return a string representation of the object.
*/
@Override
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append( this.fromTable );
sb.append( " [" );
for ( int i = 0; i < this.fkColumns.length; i++ ) {
sb.append( fkColumns[i].getField() );
if ( i != this.fkColumns.length - 1 ) {
sb.append( ',' );
}
}
sb.append( "] -> " );
sb.append( this.toTable );
sb.append( " [" );
for ( int i = 0; i < this.fkColumns.length; i++ ) {
sb.append( keyColumns[i].getField() );
if ( i != this.fkColumns.length - 1 ) {
sb.append( ',' );
}
}
sb.append( "]" );
return sb.toString();
}
}
/* ********************************************************************
Changes to this class. What the people have been up to:
$Log: TableReference.java,v $
Revision 1.4 2006/09/26 16:45:45 mschneider
Javadoc corrections + fixed warnings.
Revision 1.3 2006/08/21 16:42:36 mschneider
Refactored due to cleanup (and splitting) of org.deegree.io.datastore.schema package.
Revision 1.2 2006/05/17 16:46:35 mschneider
Reformatted.
Revision 1.1 2006/05/12 15:48:49 mschneider
Initial version.
********************************************************************** */