/* // $Id: //guest/julian_hyde/saffron/src/main/saffron/rel/java/JavaFilter.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.rel.java; import openjava.ptree.Expression; import openjava.ptree.IfStatement; import openjava.ptree.StatementList; import saffron.opt.CallingConvention; import saffron.opt.Cluster; import saffron.opt.Implementor; import saffron.rel.Rel; import saffron.util.Util; /** * <code>JavaFilter</code> implements {@link saffron.rel.Filter} in code. **/ public class JavaFilter extends saffron.rel.Filter { public JavaFilter(Cluster cluster, Rel child, Expression condition) { super(cluster, child, condition); } public Object clone() { return new JavaFilter( cluster, (Rel) child.clone(), Util.clone(condition)); } // implement Rel public int getConvention() { return CallingConvention.JAVA; } // implement Rel public Object implement(Implementor implementor, int ordinal) { switch (ordinal) { case -1: // called from parent return implementor.implementChild(this, 0, child); case 0: // called from child // Generate // if (condition) { // <<parent-handler>> // } StatementList stmtList = implementor.getStatementList(); StatementList ifBody = new StatementList(); Expression condition2 = implementor.translate(this, condition); stmtList.add( new IfStatement(condition2, ifBody)); implementor.generateParentBody(this, ifBody); return null; default: throw Util.newInternal( "implement: ordinal=" + ordinal); } } }
# | Change | User | Description | Committed | |
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#3 | 1853 | Julian Hyde |
saffron: Further improve binding of rows to variables. |
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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. |