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IpIdentityMatrix.hpp
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1 // Copyright (C) 2004, 2008 International Business Machines and others.
2 // All Rights Reserved.
3 // This code is published under the Eclipse Public License.
4 //
5 // $Id: IpIdentityMatrix.hpp 1861 2010-12-21 21:34:47Z andreasw $
6 //
7 // Authors: Carl Laird, Andreas Waechter IBM 2004-08-13
8 
9 #ifndef __IPIDENTITYMATRIX_HPP__
10 #define __IPIDENTITYMATRIX_HPP__
11 
12 #include "IpUtils.hpp"
13 #include "IpSymMatrix.hpp"
14 
15 namespace Ipopt
16 {
17 
21  class IdentityMatrix : public SymMatrix
22  {
23  public:
24 
27 
31  IdentityMatrix(const SymMatrixSpace* owner_space);
32 
36 
38  void SetFactor(Number factor)
39  {
40  factor_ = factor;
41  }
42 
44  Number GetFactor() const
45  {
46  return factor_;
47  }
48 
50  Index Dim() const;
51 
52  protected:
55  virtual void MultVectorImpl(Number alpha, const Vector& x,
56  Number beta, Vector& y) const;
57 
58  virtual void AddMSinvZImpl(Number alpha, const Vector& S,
59  const Vector& Z, Vector& X) const;
60 
63  virtual bool HasValidNumbersImpl() const;
64 
65  virtual void ComputeRowAMaxImpl(Vector& rows_norms, bool init) const;
66 
67  virtual void PrintImpl(const Journalist& jnlst,
68  EJournalLevel level,
69  EJournalCategory category,
70  const std::string& name,
71  Index indent,
72  const std::string& prefix) const;
74 
75  private:
86 
89 
91  void operator=(const IdentityMatrix&);
93 
96  };
97 
100  {
101  public:
106  :
107  SymMatrixSpace(dim)
108  {}
109 
112  {}
114 
117  virtual SymMatrix* MakeNewSymMatrix() const
118  {
119  return MakeNewIdentityMatrix();
120  }
121 
124  {
125  return new IdentityMatrix(this);
126  }
127 
128  private:
139 
142 
144  void operator=(const IdentityMatrixSpace&);
146  };
147 
148 } // namespace Ipopt
149 #endif