SST_Update.java

/*
 * NOTE: This copyright does *not* cover user programs that use HQ
 * program services by normal system calls through the application
 * program interfaces provided as part of the Hyperic Plug-in Development
 * Kit or the Hyperic Client Development Kit - this is merely considered
 * normal use of the program, and does *not* fall under the heading of
 * "derived work".
 * 
 * Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
 * This file is part of HQ.
 * 
 * HQ is free software; you can redistribute it and/or modify
 * it under the terms version 2 of the GNU General Public License as
 * published by the Free Software Foundation. This program 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 General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 */

package org.hyperic.tools.ant.dbupgrade;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.Types;

import org.apache.tools.ant.BuildException;
import org.hyperic.util.jdbc.DBUtil;

public class SST_Update extends SchemaSpecTask {

    protected String table = null;
    protected String column = null;
    protected String columnType = null;
    protected String value = null;
    protected String where = null;

    public SST_Update () {}

    public void setTable (String t) {
        table = t;
    }
    public void setColumn (String c) {
        column = c;
    }
    public void setColumnType (String ct) {
        columnType = ct;
    }
    public void setValue (String v) {
        value = v;
    }
    public void setWhere (String w) {
        where = w;
    }

    public void execute () throws BuildException {

        validateAttributes();

        Connection c = getConnection();
        PreparedStatement ps = null;
        String updateSql
            = "UPDATE " + table + " SET " + column + " = ? ";
        if ( where != null ) { updateSql += "WHERE " + where; }

        int sqlType = translateSqlType(columnType);
        
        try {
            // Check to see if the column exists.
            boolean foundColumn = DBUtil.checkColumnExists(_ctx, c, 
                                                           table, column);
            if ( !foundColumn ) {
                throw new BuildException("Cannot update: column " + column
                                         + " does not exist in table " + table);
            }

            // Update the column.
            ps = c.prepareStatement(updateSql);
            if (sqlType == Types.BOOLEAN) {
                DBUtil.setBooleanValue(Boolean.valueOf(value).booleanValue(), 
                                       c, ps, 1);

            } else if ( sqlType == Types.BIGINT ) {
                ps.setLong(1, Long.parseLong(value));

            } else {
                ps.setObject(1, value, sqlType);
            }
            String whereDebug = (where==null) ? "" : " where " + where;
            log(">>>>> Updating " + table + "." + column 
                + "=" + value + whereDebug);
            ps.executeUpdate();

        } catch ( Exception e ) {
            throw new BuildException("Error updating " + table + "." + column 
                                     + ": " + e, e);
        } finally {
            DBUtil.closeStatement(_ctx, ps);
        }
        
    }

    protected void validateAttributes () throws BuildException {
        if ( table == null )
            throw new BuildException("SchemaSpec: update: No 'table' attribute specified.");
        if ( column == null )
            throw new BuildException("SchemaSpec: update: No 'column' attribute specified.");
        if ( value == null )
            throw new BuildException("SchemaSpec: update: No 'value' attribute specified.");
    }
}