001    /*
002     * JBoss DNA (http://www.jboss.org/dna)
003     * See the COPYRIGHT.txt file distributed with this work for information
004     * regarding copyright ownership.  Some portions may be licensed
005     * to Red Hat, Inc. under one or more contributor license agreements.
006     * See the AUTHORS.txt file in the distribution for a full listing of 
007     * individual contributors. 
008     *
009     * JBoss DNA is free software. Unless otherwise indicated, all code in JBoss DNA
010     * is licensed to you under the terms of the GNU Lesser General Public License as
011     * published by the Free Software Foundation; either version 2.1 of
012     * the License, or (at your option) any later version.
013     *
014     * JBoss DNA is distributed in the hope that it will be useful,
015     * but WITHOUT ANY WARRANTY; without even the implied warranty of
016     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
017     * Lesser General Public License for more details.
018     *
019     * You should have received a copy of the GNU Lesser General Public
020     * License along with this software; if not, write to the Free
021     * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
022     * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
023     */
024    package org.jboss.dna.common.jdbc.model.spi;
025    
026    import java.util.Set;
027    import java.util.HashSet;
028    import org.jboss.dna.common.jdbc.model.api.PrimaryKey;
029    import org.jboss.dna.common.jdbc.model.api.PrimaryKeyColumn;
030    
031    /**
032     * Provides database table's primary key specific metadata.
033     * 
034     * @author <a href="mailto:litsenko_sergey@yahoo.com">Sergiy Litsenko</a>
035     */
036    public class PrimaryKeyBean extends SchemaObjectBean implements PrimaryKey {
037        private static final long serialVersionUID = -6620964715120791723L;
038        private Set<PrimaryKeyColumn> columns = new HashSet<PrimaryKeyColumn>();
039    
040        /**
041         * Default constructor
042         */
043        public PrimaryKeyBean() {
044        }
045    
046        /**
047         * Retrieves primary key columns
048         * 
049         * @return primary key columns
050         */
051        public Set<PrimaryKeyColumn> getColumns() {
052            return columns;
053        }
054    
055        /**
056         * Adds PrimaryKeyColumn
057         * 
058         * @param primaryKeyColumn the PrimaryKeyColumn
059         */
060        public void addColumn( PrimaryKeyColumn primaryKeyColumn ) {
061            columns.add(primaryKeyColumn);
062        }
063    
064        /**
065         * deletes PrimaryKeyColumn
066         * 
067         * @param primaryKeyColumn the PrimaryKeyColumn
068         */
069        public void deleteColumn( PrimaryKeyColumn primaryKeyColumn ) {
070            columns.remove(primaryKeyColumn);
071        }
072    
073        /**
074         * Returns table column for specified column name or null
075         * 
076         * @param columnName the name of column
077         * @return table column for specified column name or null.
078         */
079        public PrimaryKeyColumn findColumnByName( String columnName ) {
080            for (PrimaryKeyColumn pkc : columns) {
081                if (pkc.getName().equals(columnName)) {
082                    return pkc;
083                }
084            }
085            // return nothing
086            return null;
087        }
088    
089    }