PLearn 0.1
PythonFeatureSet.cc
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00001 // -*- C++ -*-
00002 
00003 // PythonFeatureSet.cc
00004 //
00005 // Copyright (C) 2006 Hugo Larochelle
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: Hugo Larochelle
00036 
00040 #include "PythonFeatureSet.h"
00041 
00042 namespace PLearn {
00043 using namespace std;
00044 
00045 PLEARN_IMPLEMENT_OBJECT(
00046     PythonFeatureSet,
00047     "FeatureSet with features being defined using a python script.",
00048     "The python script should define a getNewFeaturesString function\n"
00049     "which has to output a vector of string features for the input token.\n"
00050     );
00051 
00052 PythonFeatureSet::PythonFeatureSet()
00053     : python()
00054 {}
00055 
00056 // ### Nothing to add here, simply calls build_
00057 void PythonFeatureSet::build()
00058 {
00059     inherited::build();
00060     build_();
00061 }
00062 
00063 void PythonFeatureSet::makeDeepCopyFromShallowCopy(CopiesMap& copies)
00064 {
00065     inherited::makeDeepCopyFromShallowCopy(copies);
00066     //deepCopyField(python, copies);
00067     //PLERROR("PythonFeatureSet::makeDeepCopyFromShallowCopy not fully (correctly) implemented yet!");
00068 }
00069 
00070 void PythonFeatureSet::declareOptions(OptionList& ol)
00071 {
00072     declareOption(ol, "code", &PythonFeatureSet::code,
00073                   OptionBase::buildoption,
00074                   "Snippet of python code that outputs the features");
00075 
00076     // Now call the parent class' declareOptions
00077     inherited::declareOptions(ol);
00078 }
00079 
00080 void PythonFeatureSet::build_()
00081 {
00082     if (code != "")
00083     {
00084         python = new PythonCodeSnippet(code);
00085         PLASSERT( python );
00086         python->build();
00087     }
00088 
00089 }
00090 
00091 void PythonFeatureSet::getNewFeaturesString(string token, TVec<string>& feats_str)
00092 {
00093     f_str.resize(1);
00094     f_str[0] = token;
00095     if(!python) build_();
00096     f_str = python->invoke("getNewFeaturesString",f_str).as<TVec<string> >();
00097     feats_str.resize(f_str.length());
00098     feats_str << f_str;
00099 }
00100 
00101 } // end of namespace PLearn
00102 
00103 
00104 /*
00105   Local Variables:
00106   mode:c++
00107   c-basic-offset:4
00108   c-file-style:"stroustrup"
00109   c-file-offsets:((innamespace . 0)(inline-open . 0))
00110   indent-tabs-mode:nil
00111   fill-column:79
00112   End:
00113 */
00114 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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