org.firebirdsql.squirrel.exp.GeneratorParentExpander Maven / Gradle / Ivy

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package org.firebirdsql.squirrel.exp;

/*
 * Copyright (C) 2002 Colin Bell
 * [email protected]
 *
 * 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
 */
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import org.firebirdsql.squirrel.FirebirdPlugin;

import net.sourceforge.squirrel_sql.fw.sql.DatabaseObjectInfo;
import net.sourceforge.squirrel_sql.fw.sql.DatabaseObjectType;
import net.sourceforge.squirrel_sql.fw.sql.IDatabaseObjectInfo;
import net.sourceforge.squirrel_sql.fw.sql.ISQLConnection;
import net.sourceforge.squirrel_sql.fw.sql.SQLDatabaseMetaData;
import net.sourceforge.squirrel_sql.fw.util.log.ILogger;
import net.sourceforge.squirrel_sql.fw.util.log.LoggerController;

import net.sourceforge.squirrel_sql.client.session.ISession;
import net.sourceforge.squirrel_sql.client.session.mainpanel.objecttree.INodeExpander;
import net.sourceforge.squirrel_sql.client.session.mainpanel.objecttree.ObjectTreeNode;

/**
 * This class handles the expanding of the "Sequence Group" node. It will give a
 * list of all the Sequences available in the schema.
 * 
 * @author Colin Bell 
 */
public class GeneratorParentExpander implements INodeExpander {

    /** SQL used to load info about sequences. */
    private static final String SQL = "select cast(rdb$generator_name as varchar(31)) as rdb$generator_name"
            + " from rdb$generators where rdb$system_flag is null";

    /** Logger for this class. */
    @SuppressWarnings("unused")
    private static final ILogger s_log = LoggerController
            .createLogger(GeneratorParentExpander.class);

    /** The plugin. */
    @SuppressWarnings("unused")
    private final FirebirdPlugin _plugin;

    /**
     * Ctor.
     * 
     * @throws IllegalArgumentException
     *             Thrown if null OraclePlugin passed.
     */
    GeneratorParentExpander(FirebirdPlugin plugin) {
        super();
        if (plugin == null) { throw new IllegalArgumentException(
                "FirebirdPlugin == null"); }

        _plugin = plugin;
    }

    /**
     * Create the child nodes for the passed parent node and return them. Note
     * that this method should not  actually add the child nodes to the
     * parent node as this is taken care of in the caller.
     * 
     * @param session
     *            Current session.
     * @param node
     *            Node to be expanded.
     * 
     * @return A list of ObjectTreeNode objects representing the
     *         child nodes for the passed node.
     */
    public List createChildren(ISession session, ObjectTreeNode parentNode)
            throws SQLException {
        final List childNodes = new ArrayList();
        final IDatabaseObjectInfo parentDbinfo = parentNode
                .getDatabaseObjectInfo();
        final ISQLConnection conn = session.getSQLConnection();
        final SQLDatabaseMetaData md = session.getSQLConnection()
                .getSQLMetaData();
        final String catalogName = parentDbinfo.getCatalogName();
        final String schemaName = parentDbinfo.getSchemaName();

        PreparedStatement pstmt = conn.prepareStatement(SQL);
        try {
            ResultSet rs = pstmt.executeQuery();
            while (rs.next()) {
                IDatabaseObjectInfo si = new DatabaseObjectInfo(catalogName,
                        schemaName, rs.getString(1),
                        DatabaseObjectType.SEQUENCE, md);
                childNodes.add(new ObjectTreeNode(session, si));
            }
        } finally {
            pstmt.close();
        }
        return childNodes;
    }
}