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+// Copyright (C) 2004, 2008 International Business Machines and others.
+// All Rights Reserved.
+// This code is published under the Eclipse Public License.
+//
+// $Id: IpZeroSymMatrix.hpp 2269 2013-05-05 11:32:40Z stefan $
+//
+// Authors: Carl Laird, Andreas Waechter IBM 2004-08-13
+
+#ifndef __IPZEROSYMMATRIX_HPP__
+#define __IPZEROSYMMATRIX_HPP__
+
+#include "IpUtils.hpp"
+#include "IpSymMatrix.hpp"
+
+namespace Ipopt
+{
+
+ /** Class for Symmetric Matrices with only zero entries.
+ */
+ class ZeroSymMatrix : public SymMatrix
+ {
+ public:
+
+ /**@name Constructors / Destructors */
+ //@{
+
+ /** Constructor, taking the corresponding matrix space.
+ */
+ ZeroSymMatrix(const SymMatrixSpace* owner_space);
+
+ /** Destructor */
+ ~ZeroSymMatrix();
+ //@}
+
+ protected:
+ /**@name Methods overloaded from matrix */
+ //@{
+ virtual void MultVectorImpl(Number alpha, const Vector& x,
+ Number beta, Vector& y) const;
+
+ virtual void TransMultVectorImpl(Number alpha, const Vector& x,
+ Number beta, Vector& y) const;
+
+ virtual void ComputeRowAMaxImpl(Vector& rows_norms, bool init) const
+ {}
+
+ virtual void ComputeColAMaxImpl(Vector& cols_norms, bool init) const
+ {}
+
+ virtual void PrintImpl(const Journalist& jnlst,
+ EJournalLevel level,
+ EJournalCategory category,
+ const std::string& name,
+ Index indent,
+ const std::string& prefix) const;
+ //@}
+
+ private:
+ /**@name Default Compiler Generated Methods
+ * (Hidden to avoid implicit creation/calling).
+ * These methods are not implemented and
+ * we do not want the compiler to implement
+ * them for us, so we declare them private
+ * and do not define them. This ensures that
+ * they will not be implicitly created/called. */
+ //@{
+ /** Default Constructor */
+ ZeroSymMatrix();
+
+ /** Copy Constructor */
+ ZeroSymMatrix(const ZeroSymMatrix&);
+
+ /** Overloaded Equals Operator */
+ void operator=(const ZeroSymMatrix&);
+ //@}
+ };
+
+ /** Class for matrix space for ZeroSymMatrix. */
+ class ZeroSymMatrixSpace : public SymMatrixSpace
+ {
+ public:
+ /** @name Constructors / Destructors */
+ //@{
+ /** Constructor, given the number of row and columns.
+ */
+ ZeroSymMatrixSpace(Index dim)
+ :
+ SymMatrixSpace(dim)
+ {}
+
+ /** Destructor */
+ virtual ~ZeroSymMatrixSpace()
+ {}
+ //@}
+
+ /** Overloaded MakeNew method for the MatrixSpace base class.
+ */
+ virtual Matrix* MakeNew() const
+ {
+ return MakeNewZeroSymMatrix();
+ }
+
+ /** Overloaded method from SymMatrixSpace base class
+ */
+ virtual SymMatrix* MakeNewSymMatrix() const
+ {
+ return MakeNewZeroSymMatrix();
+ }
+
+ /** Method for creating a new matrix of this specific type. */
+ ZeroSymMatrix* MakeNewZeroSymMatrix() const
+ {
+ return new ZeroSymMatrix(this);
+ }
+ private:
+ /**@name Default Compiler Generated Methods
+ * (Hidden to avoid implicit creation/calling).
+ * These methods are not implemented and
+ * we do not want the compiler to implement
+ * them for us, so we declare them private
+ * and do not define them. This ensures that
+ * they will not be implicitly created/called. */
+ //@{
+ /** Default Constructor */
+ ZeroSymMatrixSpace();
+
+ /** Copy Constructor */
+ ZeroSymMatrixSpace(const ZeroSymMatrixSpace&);
+
+ /** Overloaded Equals Operator */
+ void operator=(const ZeroSymMatrixSpace&);
+ //@}
+ };
+} // namespace Ipopt
+#endif