/* // $Id: //guest/julian_hyde/saffron/src/main/saffron/rel/iter/IterConcatenate.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.iter; import openjava.mop.OJClass; import openjava.ptree.*; 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>IterConcatenate</code> concatenates several iterators. It is an * iterator implementation of {@link Union}. **/ public class IterConcatenate extends Union { public IterConcatenate(Cluster cluster, Rel[] inputs) { super(cluster, inputs, true /*all*/); } public Object clone() { return new IterConcatenate(cluster, inputs); } public int getConvention() { return CallingConvention.ITERATOR; } public Cost computeSelfCost(Planner planner) { double dRows = getRows(), dCpu = 0, dIo = 0; return planner.makeCost(dRows, dCpu, dIo); } public Object implement(Implementor implementor, int ordinal) { switch (ordinal) { case -1: // Generate // new CompoundIterator( // new Iterator[] {<<input0>>, ...}) ExpressionList exps = new ExpressionList(); for (int i = 0; i < inputs.length; i++) { Expression exp = (Expression) implementor.implementChild( this, i, inputs[i]); exps.add(exp); } return new AllocationExpression( OJClass.forClass(saffron.runtime.CompoundIterator.class), new ExpressionList( new ArrayAllocationExpression( Util.clazzIterator, new ExpressionList(null), new ArrayInitializer( exps)))); default: throw Util.newInternal( "implement: ordinal=" + ordinal); } } }
# | Change | User | Description | Committed | |
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#2 | 1748 | Julian Hyde |
saffron: convert unit tests to JUnit; add CallingConvention.ITERABLE; lots of other stuff; release 0.1. |
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#1 | 1467 | Julian Hyde |
saffron: First saffron check-in; incorporate my changes to openjava. |