package net.sourceforge.squirrel_sql.plugins.refactoring.commands;
/*
* Copyright (C) 2006 Rob Manning
* manningr@users.sourceforge.net
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or any later version.
*
* 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.
*/
import java.sql.SQLException;
import net.sourceforge.squirrel_sql.client.gui.db.ColumnListDialog;
import net.sourceforge.squirrel_sql.client.session.ISession;
import net.sourceforge.squirrel_sql.client.session.SQLExecuterTask;
import net.sourceforge.squirrel_sql.fw.dialects.HibernateDialect;
import net.sourceforge.squirrel_sql.fw.dialects.UserCancelledOperationException;
import net.sourceforge.squirrel_sql.fw.gui.GUIUtils;
import net.sourceforge.squirrel_sql.fw.sql.IDatabaseObjectInfo;
import net.sourceforge.squirrel_sql.fw.sql.ITableInfo;
import net.sourceforge.squirrel_sql.fw.sql.TableColumnInfo;
import net.sourceforge.squirrel_sql.fw.util.StringManager;
import net.sourceforge.squirrel_sql.fw.util.StringManagerFactory;
import net.sourceforge.squirrel_sql.fw.util.log.ILogger;
import net.sourceforge.squirrel_sql.fw.util.log.LoggerController;
public class DropColumnCommand extends AbstractRefactoringCommand
{
/**
* Logger for this class.
*/
private final static ILogger s_log = LoggerController.createLogger(DropColumnCommand.class);
/**
* Internationalized strings for this class.
*/
private static final StringManager s_stringMgr =
StringManagerFactory.getStringManager(DropColumnCommand.class);
static interface i18n
{
// i18n[RemoveColumnCommand.singleColumnMessage=The table's only column cannot be removed - a table
// must have a least one column.]
String SINGLE_COLUMN_MESSAGE = s_stringMgr.getString("RemoveColumnAction.singleColumnMessage");
String SHOWSQL_DIALOG_TITLE = s_stringMgr.getString("RemoveColumnCommand.sqlDialogTitle");
}
/**
* Dialog that is displayed to user when this command is executed and there is more than one column in the
* table that was selected.
*/
protected ColumnListDialog customDialog;
/**
* Creates an instance of ModifyColumnCommand.
*
* @param session the current ISession
* @param info the list of IDatabaseObjectInfo(s) that the user selected
*/
public DropColumnCommand(ISession session, IDatabaseObjectInfo[] info)
{
super(session, info);
}
/**
* @see net.sourceforge.squirrel_sql.plugins.refactoring.commands.AbstractRefactoringCommand#onExecute()
*/
@Override
protected void onExecute() throws SQLException
{
if (!(_info[0] instanceof ITableInfo))
{
s_log.error("onExecute: _info[0] isn't an instance of ITableInfo: class="
+ _info[0].getClass().getName());
return;
}
ITableInfo ti = (ITableInfo) _info[0];
TableColumnInfo[] columns = _session.getSQLConnection().getSQLMetaData().getColumnInfo(ti);
if (columns.length < 2)
{
// If the table has only one column, it cannot be dropped
_session.showErrorMessage(i18n.SINGLE_COLUMN_MESSAGE);
} else
{
showCustomDialog();
}
}
/**
* @see net.sourceforge.squirrel_sql.plugins.refactoring.commands.AbstractRefactoringCommand#generateSQLStatements()
*/
@Override
protected String[] generateSQLStatements() throws UserCancelledOperationException
{
TableColumnInfo[] columns = customDialog.getSelectedColumnList();
String[] result = new String[columns.length];
try
{
String tableName = _info[0].getSimpleName();
for (int i = 0; i < columns.length; i++)
{
TableColumnInfo info = columns[i];
String columnName = info.getColumnName();
result[i] = _dialect.getColumnDropSQL(tableName, columnName, _qualifier, _sqlPrefs);
}
} catch (UnsupportedOperationException e2)
{
_session.showMessage(s_stringMgr.getString("RemoveColumnCommand.unsupportedOperationMsg",
_dialect.getDisplayName()));
}
return result;
}
/**
* @see net.sourceforge.squirrel_sql.plugins.refactoring.commands.AbstractRefactoringCommand#executeScript(java.lang.String)
*/
@Override
protected void executeScript(String script)
{
CommandExecHandler handler = new CommandExecHandler(_session);
SQLExecuterTask executer = new SQLExecuterTask(_session, script, handler);
executer.run(); // Execute the sql synchronously
_session.getApplication().getThreadPool().addTask(new Runnable()
{
public void run()
{
GUIUtils.processOnSwingEventThread(new Runnable()
{
public void run()
{
customDialog.setVisible(false);
_session.getSchemaInfo().reload(_info[0]);
}
});
}
});
}
/**
* Returns a boolean value indicating whether or not this refactoring is supported for the specified
* dialect.
*
* @param dialect
* the HibernateDialect to check
* @return true if this refactoring is supported; false otherwise.
*/
@Override
protected boolean isRefactoringSupportedForDialect(HibernateDialect dialect)
{
return dialect.supportsDropColumn();
}
private void showCustomDialog() throws SQLException
{
ITableInfo ti = (ITableInfo) _info[0];
TableColumnInfo[] columns = _session.getMetaData().getColumnInfo(ti);
// Show the user a dialog with a list of columns and ask them to select
customDialog = new ColumnListDialog(columns, ColumnListDialog.DROP_COLUMN_MODE);
customDialog.setMultiSelection();
customDialog.setTableName(ti.getQualifiedName());
customDialog.addColumnSelectionListener(new ExecuteListener());
customDialog.addEditSQLListener(new EditSQLListener(customDialog));
customDialog.addShowSQLListener(new ShowSQLListener(i18n.SHOWSQL_DIALOG_TITLE, customDialog));
customDialog.setLocationRelativeTo(_session.getApplication().getMainFrame());
customDialog.setVisible(true);
}
}