/* // $Id: //guest/julian_hyde/saffron/src/main/saffron/ext/ReflectSchema.java#2 $ // Saffron preprocessor and data engine // Copyright (C) 2002 Julian Hyde <julian.hyde@mail.com> // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Library General Public // License as published by the Free Software Foundation; either // version 2 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 // Library General Public License for more details. // // You should have received a copy of the GNU Library 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. // // See the COPYING file located in the top-level-directory of // the archive of this library for complete text of license. */ package saffron.ext; import openjava.ptree.MethodCall; import saffron.Planner; import saffron.Schema; import saffron.Table; import java.lang.reflect.Field; /** * <code>ReflectSchema</code> uses reflection to find definitions of * tables. * * @author jhyde * @since 10 November, 2001 * @version $Id: //guest/julian_hyde/saffron/src/main/saffron/ext/ReflectSchema.java#2 $ **/ public class ReflectSchema implements Schema { // implement Schema public Table getTableForMember(String name) { try { Class clazz = getClass(); Field field = clazz.getField(name); Object o = field.get(this); if (o instanceof Table) { return (Table) o; } throw new Error(name + " is not a Table"); } catch (NoSuchFieldException e) { return null; } catch (IllegalAccessException e) { return null; } } // implement Schema public Table getTableForMethodCall(MethodCall call) { // this implementation of Schema doesn't recognize method calls return null; } public void registerRules(Planner planner) throws Exception { // this implementation of Schema doesn't have any rules } } // End ReflectSchema.java
# | Change | User | Description | Committed | |
---|---|---|---|---|---|
#2 | 1801 | Julian Hyde |
saffron: add ObjectSchema; rules can now be matched more than once; started to implement correlations in queries in from list. |
||
#1 | 1467 | Julian Hyde |
saffron: First saffron check-in; incorporate my changes to openjava. |