/* // $Id: //guest/julian_hyde/saffron/src/main/saffron/rel/java/JavaUnionAll.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.rel.java; import openjava.ptree.StatementList; import saffron.Planner; import saffron.opt.CallingConvention; import saffron.opt.Cluster; import saffron.opt.Cost; import saffron.opt.Implementor; import saffron.rel.Rel; import saffron.rel.Union; import saffron.util.Util; /** * <code>JavaUnionAll</code> implements a {@link Union} inline, without * eliminating duplicates. **/ public class JavaUnionAll extends Union { public JavaUnionAll(Cluster cluster, Rel[] inputs) { super(cluster, inputs, true); } // implement Rel public Object clone() { return new JavaUnionAll(cluster, inputs); } public int getConvention() { return CallingConvention.JAVA; } public Cost computeSelfCost(Planner planner) { double dRows = getRows(), dCpu = 0, dIo = 0; return planner.makeCost(dRows, dCpu, dIo); } // Generate // for (int i = 0; i < a.length; i++) { // T row = a[i]; // stuff // } // for (int j = 0; j < b.length; j++) { // T row = b[j]; // stuff // } // public Object implement(Implementor implementor, int ordinal) { switch (ordinal) { case -1: for (int i = 0; i < inputs.length; i++) { Util.discard( implementor.implementChild(this, i, inputs[i])); } return null; default: if (ordinal >= inputs.length) { throw Util.newInternal( "implement: ordinal=" + ordinal); } // Generate // <<child loop>> { // Type var = <<child row>> // <<parent-handler>> // } // <<next child>> StatementList stmtList = implementor.getStatementList(); implementor.bind(this, inputs[ordinal]); implementor.generateParentBody(this, stmtList); return null; } } }
# | Change | User | Description | Committed | |
---|---|---|---|---|---|
#1 | 1467 | Julian Hyde |
saffron: First saffron check-in; incorporate my changes to openjava. |