/*
 * Copyright (C) 2006 Davy Vanherbergen
 * dvanherbergen@users.sourceforge.net
 *
 * This program 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
 */
package net.sourceforge.sqlexplorer.dbstructure.nodes;

import java.util.Comparator;
import java.util.Iterator;

import net.sourceforge.sqlexplorer.Messages;
import net.sourceforge.sqlexplorer.plugin.SQLExplorerPlugin;
import net.sourceforge.squirrel_sql.fw.sql.ITableInfo;

public class ColumnFolderNode extends AbstractFolderNode {

    /**
     * Create new database table node.
     * 
     * @param parent node
     * @param name of this node
     * @param sessionNode session for this node
     */
    public ColumnFolderNode(INode parent, ITableInfo tableInfo) {
    	super(parent, Messages.getString("DatabaseStructureView.node.Columns"), parent.getSession(), "column_folder");
    }


    /**
     * Sort columns: PK - FK - Name..
     */
    public Comparator getComparator() {

        return new Comparator() {

            public int compare(Object arg0, Object arg1) {

                if (arg0 == null || arg1 == null) {
                    return 0;
                }
                ColumnNode node1 = (ColumnNode) arg0;
                ColumnNode node2 = (ColumnNode) arg1;

                if (node1.isPrimaryKey() && !node2.isPrimaryKey()) {
                    return -1;
                }
                if (!node1.isPrimaryKey() && node2.isPrimaryKey()) {
                    return 1;
                }
                if (node1.isForeignKey() && !node2.isForeignKey()) {
                    return -1;
                }
                if (!node1.isForeignKey() && node2.isForeignKey()) {
                    return 1;
                }

                return node1.getName().compareTo(node2.getName());
            }

        };
    }

    /**
     * @return Qualified table name
     */
    public String getQualifiedName() {
        return getParent().getQualifiedName() + "." + getType();
    }


    /**
     * 
     * 
     * @see net.sourceforge.sqlexplorer.dbstructure.nodes.AbstractNode#loadChildren()
     */
    public void loadChildren() {

        try {
            Iterator it = ((TableNode) _parent).getColumnNames().iterator();
            while (it.hasNext()) {
                addChildNode(new ColumnNode(this, (String) it.next(), _session, (TableNode) _parent, true));
            }
        } catch (Exception e) {
            SQLExplorerPlugin.error("Could not create child nodes for " + getName(), e);
        }
    }

}