PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // OracleObjectGenerator.cc 00004 // 00005 // Copyright (C) 2004 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: Rejean Ducharme 00036 /* ******************************************************* 00037 * $Id: OracleObjectGenerator.cc 8897 2008-04-25 18:18:23Z nouiz $ 00038 ******************************************************* */ 00039 00040 #include "OracleObjectGenerator.h" 00041 00042 namespace PLearn { 00043 using namespace std; 00044 00045 PLEARN_IMPLEMENT_OBJECT(OracleObjectGenerator, "Generates several variants of an object from varying options returned by an OptionsOracle.", 00046 "The OracleObjectGenerator implements the object-generation technique \n" 00047 "using an oracle (subclass of OptionsOracle) to produce a new list of parameters. \n"); 00048 00049 00050 OracleObjectGenerator::OracleObjectGenerator() 00051 {} 00052 00053 void OracleObjectGenerator::build_() 00054 { 00055 if (oracle.isNull()) 00056 PLERROR("An OracleObjectGenerator MUST contain an oracle (an OptionsOracle)."); 00057 00058 oracle->build(); 00059 last_params.resize(0); 00060 } 00061 00062 void OracleObjectGenerator::build() 00063 { 00064 inherited::build(); 00065 build_(); 00066 } 00067 00068 void OracleObjectGenerator::forget() 00069 { 00070 inherited::forget(); 00071 oracle->forget(); 00072 last_params.resize(0); 00073 } 00074 00075 void OracleObjectGenerator::declareOptions(OptionList& ol) 00076 { 00077 declareOption(ol, "oracle", &OracleObjectGenerator::oracle, 00078 OptionBase::buildoption, "The OptionsOracle used to generate the new Object parameters. \n"); 00079 00080 declareOption(ol,"last_params", &OracleObjectGenerator::last_params, 00081 OptionBase::learntoption, 00082 "The last parameter returned by the oracle. \n"); 00083 00084 inherited::declareOptions(ol); 00085 } 00086 00087 PP<Object> OracleObjectGenerator::generateNextObject() 00088 { 00089 PP<Object> next_obj; 00090 00091 TVec<string> new_params = generation_began ? oracle->generateNextTrial(last_params, FLT_MAX) : oracle->generateFirstTrial(); 00092 00093 if (new_params.size() > 0) 00094 { 00095 CopiesMap copies; 00096 next_obj = template_object->deepCopy(copies); 00097 TVec<string> option_names = oracle->getOptionNames(); 00098 for (int i=0; i<option_names.size(); i++) 00099 { 00100 next_obj->setOption(option_names[i], new_params[i]); 00101 } 00102 next_obj->build(); 00103 } 00104 00105 last_params = new_params; 00106 generation_began = true; 00107 00108 return next_obj; 00109 } 00110 00111 void OracleObjectGenerator::makeDeepCopyFromShallowCopy(CopiesMap& copies) 00112 { 00113 inherited::makeDeepCopyFromShallowCopy(copies); 00114 deepCopyField(last_params, copies); 00115 } 00116 00117 } // end of namespace PLearn 00118 00119 00120 /* 00121 Local Variables: 00122 mode:c++ 00123 c-basic-offset:4 00124 c-file-style:"stroustrup" 00125 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00126 indent-tabs-mode:nil 00127 fill-column:79 00128 End: 00129 */ 00130 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :