/* // $Id: //guest/julian_hyde/saffron/src/main/saffron/util/SaffronSchemaExpander.java#1 $ // 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.util; import openjava.mop.Environment; import openjava.mop.OJClass; import openjava.ptree.*; import openjava.ptree.util.ScopeHandler; import saffron.Table; /** * <code>SaffronSchemaExpander</code> converts field accesses of the form * <code>schema.field</code> and method calls of the form * <code>schema.method(arg0,...)</code>, where <code>schema</code> is an object * which implements {@link Schema} into valid Java fragments like * <code>(Sales.Emp[]) schema.contentsAsArray("emps")</code>. See {@link * Connection#contentsAsArray} for how these fragments are converted into * efficient code. * * @author jhyde * @since 11 November, 2001 * @version $Id: //guest/julian_hyde/saffron/src/main/saffron/util/SaffronSchemaExpander.java#1 $ **/ public class SaffronSchemaExpander extends ScopeHandler { public SaffronSchemaExpander(Environment env) { super(env); } public Expression evaluateDown(FieldAccess p) throws ParseTreeException { super.evaluateDown(p); Expression refexpr = p.getReferenceExpr(); // e.g. "sales" if (refexpr != null) { Environment env = getEnvironment(); OJClass reftype = Util.getType(env, refexpr); // e.g. "SalesSchema" String name = p.getName(); // e.g. "emps" Table table = Util.getTable(reftype, name); if (table != null) { // (Emp[]) sales.contentsAsArray("emp") return new AliasedExpression( new CastExpression( OJClass.arrayOf(table.getRowType()), new MethodCall( refexpr, "contentsAsArray", new ExpressionList( Literal.makeLiteral(name)))), name); } } return p; } } // End SaffronSchemaExpander.java
# | Change | User | Description | Committed | |
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#2 | 1474 | Julian Hyde |
saffron: Aggregations are working. Renamed 'aggregator' to 'aggregation'. |
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#1 | 1467 | Julian Hyde |
saffron: First saffron check-in; incorporate my changes to openjava. |