PLearn 0.1
NaryVariable.cc
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00001 // -*- C++ -*-
00002 
00003 // PLearn (A C++ Machine Learning Library)
00004 // Copyright (C) 1998 Pascal Vincent
00005 // Copyright (C) 1999-2002 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal
00006 // Copyright (C) 2001-2002 Nicolas Chapados, Ichiro Takeuchi, Jean-Sebastien Senecal
00007 // Copyright (C) 2002 Xiangdong Wang, Christian Dorion
00008 
00009 // Redistribution and use in source and binary forms, with or without
00010 // modification, are permitted provided that the following conditions are met:
00011 // 
00012 //  1. Redistributions of source code must retain the above copyright
00013 //     notice, this list of conditions and the following disclaimer.
00014 // 
00015 //  2. Redistributions in binary form must reproduce the above copyright
00016 //     notice, this list of conditions and the following disclaimer in the
00017 //     documentation and/or other materials provided with the distribution.
00018 // 
00019 //  3. The name of the authors may not be used to endorse or promote
00020 //     products derived from this software without specific prior written
00021 //     permission.
00022 // 
00023 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00024 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00025 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00026 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00027 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00028 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00029 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00030 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00031 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00032 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00033 // 
00034 // This file is part of the PLearn library. For more information on the PLearn
00035 // library, go to the PLearn Web site at www.plearn.org
00036 
00037 
00038 /* *******************************************************      
00039  * $Id: NaryVariable.cc 10201 2009-05-12 17:57:00Z plearner $
00040  * This file is part of the PLearn library.
00041  ******************************************************* */
00042 
00043 #include "NaryVariable.h"
00044 
00045 namespace PLearn {
00046 using namespace std;
00047 
00050 PLEARN_IMPLEMENT_ABSTRACT_OBJECT(NaryVariable,
00051     "A Variable that may take more than two other Variables as input.",
00052     ""
00053 );
00054 
00056 // NaryVariable //
00058 NaryVariable::NaryVariable(const VarArray& the_varray, int thelength,
00059                            int thewidth, bool call_build_):
00060     inherited(thelength, thewidth, call_build_),
00061     varray(the_varray)
00062 {
00063     if (call_build_)
00064         build_();
00065 }
00066 
00068 // declareOptions //
00070 void NaryVariable::declareOptions(OptionList& ol)
00071 {
00072     declareOption(ol, "varray", &NaryVariable::varray, OptionBase::buildoption, 
00073                   "The array of parent variables that this one depends on.");
00074 
00075     inherited::declareOptions(ol);
00076 }
00077 
00079 // build //
00081 void NaryVariable::build()
00082 {
00083     inherited::build();
00084     build_();
00085 }
00086 
00088 // build_ //
00090 void NaryVariable::build_()
00091 {
00092     // Nothing to do here.
00093 }
00094 
00096 // makeDeepCopyFromShallowCopy //
00098 void NaryVariable::makeDeepCopyFromShallowCopy(CopiesMap& copies)
00099 {
00100     inherited::makeDeepCopyFromShallowCopy(copies);
00101     deepCopyField(varray, copies);
00102 }
00103 
00104 void NaryVariable::setParents(const VarArray& parents)
00105 {
00106     varray = parents;
00107     sizeprop();
00108 }
00109 
00110 bool NaryVariable::markPath()
00111 {
00112     if(!marked)
00113     {
00114         for(int i=0; i<varray.size(); i++)
00115             if (!varray[i].isNull())
00116                 marked |= varray[i]->markPath();
00117     }
00118     return marked;
00119 }
00120 
00121 
00122 void NaryVariable::buildPath(VarArray& proppath)
00123 {
00124     if(marked)
00125     {
00126         for(int i=0; i<varray.size(); i++)
00127             if (!varray[i].isNull())
00128                 varray[i]->buildPath(proppath);
00129         proppath &= Var(this);
00130         clearMark();
00131     }
00132 }
00133 
00134 
00135 VarArray NaryVariable::sources()
00136 {
00137     VarArray a(0,0);
00138     if (!marked)
00139     {
00140         marked = true;
00141         for(int i=0; i<varray.size(); i++)
00142             if (!varray[i].isNull())
00143                 a &= varray[i]->sources();
00144         //if (a.size()==0)
00145         //    a &= Var(this);
00146     }
00147     return a;
00148 }
00149 
00150 
00151 VarArray NaryVariable::random_sources()
00152 {
00153     VarArray a(0,0);
00154     if (!marked)
00155     {
00156         marked = true;
00157         for(int i=0; i<varray.size(); i++)
00158             if (!varray[i].isNull())
00159                 a &= varray[i]->random_sources();
00160     }
00161     return a;
00162 }
00163 
00164 
00165 VarArray NaryVariable::ancestors() 
00166 { 
00167     VarArray a(0,0);
00168     if (marked)
00169         return a;
00170     marked = true;
00171     for(int i=0; i<varray.size(); i++)
00172         if (!varray[i].isNull())
00173             a &= varray[i]->ancestors();
00174     a &= Var(this);
00175     return a;
00176 }
00177 
00178 
00179 void NaryVariable::unmarkAncestors()
00180 {
00181     if (marked)
00182     {
00183         marked = false;
00184         for(int i=0; i<varray.size(); i++)
00185             if (!varray[i].isNull())
00186                 varray[i]->unmarkAncestors();
00187     }
00188 }
00189 
00190 
00191 VarArray NaryVariable::parents()
00192 {
00193     VarArray unmarked_parents;
00194     for(int i=0; i<varray.size(); i++)
00195         if (!varray[i].isNull() && !varray[i]->marked)
00196             unmarked_parents.append(varray[i]);
00197     return unmarked_parents;
00198 }
00199 
00200 
00201 void NaryVariable::resizeRValue()
00202 {
00203     inherited::resizeRValue();
00204     for (int i=0; i<varray.size(); i++)
00205         if (!varray[i]->rvaluedata) varray[i]->resizeRValue();
00206 }
00207 
00208 
00209 
00210 } // end of namespace PLearn
00211 
00212 
00213 /*
00214   Local Variables:
00215   mode:c++
00216   c-basic-offset:4
00217   c-file-style:"stroustrup"
00218   c-file-offsets:((innamespace . 0)(inline-open . 0))
00219   indent-tabs-mode:nil
00220   fill-column:79
00221   End:
00222 */
00223 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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