/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.db.sql;
import com.caucho.db.table.Table;
import java.util.ArrayList;
import java.util.logging.Logger;
/**
* Represents a table binding for a from.
*/
public class FromItem {
private Table _table;
private String _name;
private FromItem _dependTable;
FromItem(Table table, String name)
{
_table = table;
_name = name;
}
/**
* Returns the FROM item's table.
*/
public Table getTable()
{
return _table;
}
/**
* Returns the FROM item's name.
*/
public String getName()
{
return _name;
}
/**
* Sets a depend table.
*/
void setDependTable(FromItem table)
{
_dependTable = table;
}
/**
* Returns true if the given table order is valid.
*/
boolean isValid(ArrayList<FromItem> tables)
{
if (_dependTable == null)
return true;
else
return ! tables.contains(this) || tables.contains(_dependTable);
}
/**
* Printable version of the FROM item.
*/
public String toString()
{
return "FromItem[" + getTable().getName() + " AS " + _name + "]";
}
}