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Thyra_MultiVectorAllocator.hpp
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00001 // @HEADER
00002 // ***********************************************************************
00003 // 
00004 //    Thyra: Interfaces and Support for Abstract Numerical Algorithms
00005 //                 Copyright (2004) Sandia Corporation
00006 // 
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00008 // license for use of this work by or on behalf of the U.S. Government.
00009 // 
00010 // This library is free software; you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as
00012 // published by the Free Software Foundation; either version 2.1 of the
00013 // License, or (at your option) any later version.
00014 //  
00015 // This library is distributed in the hope that it will be useful, but
00016 // WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //  
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00023 // USA
00024 // Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
00025 // 
00026 // ***********************************************************************
00027 // @HEADER
00028 
00029 #ifndef THYRA_MULTI_VECTOR_ALLOCATOR_HPP
00030 #define THYRA_MULTI_VECTOR_ALLOCATOR_HPP
00031 
00032 #include "Thyra_VectorSpaceBase.hpp"
00033 #include "Teuchos_TestForException.hpp"
00034 
00035 namespace Thyra {
00036 
00040 template<class Scalar>
00041 class MultiVectorAllocator {
00042 public:
00044   MultiVectorAllocator() : numMembers_(0) {}
00046   typedef Teuchos::RCP<MultiVectorBase<Scalar> >  ptr_t;         // required!
00048   MultiVectorAllocator( const Teuchos::RCP<const VectorSpaceBase<Scalar> > &vs, int numMembers )
00049     : vs_(vs), numMembers_(numMembers)
00050     {
00051 #ifdef TEUCHOS_DEBUG
00052       TEST_FOR_EXCEPTION( vs.get()==NULL, std::logic_error, "Error!" );
00053 #endif      
00054     }
00056   const ptr_t allocate() const { return vs_->createMembers(numMembers_); }  // required!
00057 private:
00058   Teuchos::RCP<const VectorSpaceBase<Scalar> >      vs_;
00059   int                                                       numMembers_;
00060 };
00061 
00062 } // namespace Thyra
00063 
00064 #endif // THYRA_MULTI_VECTOR_ALLOCATOR_HPP
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