PLearn 0.1
PythonTableVMatrix.cc
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00001 // -*- C++ -*-
00002 
00003 // PythonTableVMatrix.cc
00004 //
00005 // Copyright (C) 2007 Xavier Saint-Mleux, ApSTAT Technologies inc.
00006 //
00007 // Redistribution and use in source and binary forms, with or without
00008 // modification, are permitted provided that the following conditions are met:
00009 //
00010 //  1. Redistributions of source code must retain the above copyright
00011 //     notice, this list of conditions and the following disclaimer.
00012 //
00013 //  2. Redistributions in binary form must reproduce the above copyright
00014 //     notice, this list of conditions and the following disclaimer in the
00015 //     documentation and/or other materials provided with the distribution.
00016 //
00017 //  3. The name of the authors may not be used to endorse or promote
00018 //     products derived from this software without specific prior written
00019 //     permission.
00020 //
00021 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00022 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00023 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00024 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00025 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00026 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00027 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00028 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00029 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00030 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00031 //
00032 // This file is part of the PLearn library. For more information on the PLearn
00033 // library, go to the PLearn Web site at www.plearn.org
00034 
00035 // Authors: Xavier Saint-Mleux
00036 
00040 #include "PythonTableVMatrix.h"
00041 
00042 namespace PLearn {
00043 using namespace std;
00044 
00045 
00046 PLEARN_IMPLEMENT_OBJECT(
00047     PythonTableVMatrix,
00048     "VMatrix wrapper for a python table (module apstat.data.table)",
00049     "VMatrix wrapper for a python table (module apstat.data.table).\n"
00050     "The underlying table must be numeric.\n"
00051     );
00052 
00053 PythonTableVMatrix::PythonTableVMatrix(PyObject* table)
00054     :the_table(table)
00055 {
00056 }
00057 
00058 void PythonTableVMatrix::getNewRow(int i, const Vec& v) const
00059 {
00060     PLASSERT(the_table);
00061     // Casting away const is okay here, PyObject_CallMethod does not
00062     // modify its arguments. XXX
00063     PyObject* row= PyObject_CallMethod(the_table, const_cast<char*>("getRow"),
00064                                        const_cast<char*>("i"), i);
00065     if(!row)
00066     {
00067         if (PyErr_Occurred()) PyErr_Print();
00068         PLERROR("in PythonTableVMatrix::getNewRow : "
00069                 "call to underlying table's 'getRow' failed.");
00070     }
00071     v << PythonObjectWrapper(row).as<Vec>();
00072     Py_DECREF(row);
00073 }
00074 
00075 void PythonTableVMatrix::declareOptions(OptionList& ol)
00076 {
00077 
00078     declareOption(ol, "table", &PythonTableVMatrix::the_table,
00079                   OptionBase::buildoption,
00080                   "underlying table");
00081 
00082     inherited::declareOptions(ol);
00083 }
00084 
00085 void PythonTableVMatrix::build_()
00086 {
00087     if(!the_table) return;
00088     // Casting away const is okay, PyObject_CallMethod does not modify its
00089     // arguments.
00090     PyObject* pywidth= PyObject_CallMethod(the_table, const_cast<char*>("width"), NULL);
00091     if(!pywidth)
00092     {
00093         if (PyErr_Occurred()) PyErr_Print();
00094         PLERROR("in PythonTableVMatrix::build_ : "
00095                 "call to underlying table's 'width' failed.");
00096     }
00097     width_= PythonObjectWrapper(pywidth);
00098     Py_DECREF(pywidth);
00099     PyObject* pylength= PyObject_CallMethod(the_table, const_cast<char*>("length"), NULL);
00100     if(!pylength)
00101     {
00102         if (PyErr_Occurred()) PyErr_Print();
00103         PLERROR("in PythonTableVMatrix::build_ : "
00104                 "call to underlying table's 'length' failed.");
00105     }
00106     length_= PythonObjectWrapper(pylength);
00107     Py_DECREF(pylength);
00108     PyObject* pyfieldnames= PyObject_GetAttrString(the_table, "fieldnames");
00109     if(!pyfieldnames)
00110     {
00111         if (PyErr_Occurred()) PyErr_Print();
00112         PLERROR("in PythonTableVMatrix::build_ : "
00113                 "access to underlying table's 'fieldnames' failed.");
00114     }
00115     declareFieldNames(PythonObjectWrapper(pyfieldnames));
00116     Py_DECREF(pyfieldnames);
00117 
00118     if(PyObject_HasAttrString(the_table, "inputsize"))
00119     {
00120         PyObject* inpsz= PyObject_GetAttrString(the_table, "inputsize");
00121         if(!inpsz)
00122         {
00123             if (PyErr_Occurred()) PyErr_Print();
00124             PLERROR("in PythonTableVMatrix::build_ : "
00125                     "access to underlying table's 'inputsize' failed.");
00126         }
00127         inputsize_= PythonObjectWrapper(inpsz).as<int>();
00128     }
00129     if(PyObject_HasAttrString(the_table, "targetsize"))
00130     {
00131         PyObject* targsz= PyObject_GetAttrString(the_table, "targetsize");
00132         if(!targsz)
00133         {
00134             if (PyErr_Occurred()) PyErr_Print();
00135             PLERROR("in PythonTableVMatrix::build_ : "
00136                     "access to underlying table's 'targetsize' failed.");
00137         }
00138         targetsize_= PythonObjectWrapper(targsz).as<int>();
00139     }
00140     if(PyObject_HasAttrString(the_table, "weightsize"))
00141     {
00142         PyObject* wgtsz= PyObject_GetAttrString(the_table, "weightsize");
00143         if(!wgtsz)
00144         {
00145             if (PyErr_Occurred()) PyErr_Print();
00146             PLERROR("in PythonTableVMatrix::build_ : "
00147                     "access to underlying table's 'weightsize' failed.");
00148         }
00149         weightsize_= PythonObjectWrapper(wgtsz).as<int>();
00150     }
00151 
00152 
00153 }
00154 
00155 void PythonTableVMatrix::build()
00156 {
00157     inherited::build();
00158     build_();
00159 }
00160 
00161 void PythonTableVMatrix::makeDeepCopyFromShallowCopy(CopiesMap& copies)
00162 {
00163     inherited::makeDeepCopyFromShallowCopy(copies);
00164 
00165     // deepCopyField(trainvec, copies);
00166 
00167     PLERROR("PythonTableVMatrix::makeDeepCopyFromShallowCopy not fully (correctly) implemented yet!");
00168 }
00169 
00170 } // end of namespace PLearn
00171 
00172 
00173 /*
00174   Local Variables:
00175   mode:c++
00176   c-basic-offset:4
00177   c-file-style:"stroustrup"
00178   c-file-offsets:((innamespace . 0)(inline-open . 0))
00179   indent-tabs-mode:nil
00180   fill-column:79
00181   End:
00182 */
00183 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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