Constructor.cc

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00001 
00002 // -*- mode: c++; c-basic-offset:4 -*-
00003 
00004 // This file is part of libdap, A C++ implementation of the OPeNDAP Data
00005 // Access Protocol.
00006 
00007 // Copyright (c) 2002,2003 OPeNDAP, Inc.
00008 // Author: James Gallagher <jgallagher@opendap.org>
00009 //
00010 // This library is free software; you can redistribute it and/or
00011 // modify it under the terms of the GNU Lesser General Public
00012 // License as published by the Free Software Foundation; either
00013 // version 2.1 of the License, or (at your option) any later version.
00014 //
00015 // This library is distributed in the hope that it will be useful,
00016 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00023 //
00024 // You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
00025 
00026 // (c) COPYRIGHT URI/MIT 1995-1999
00027 // Please read the full copyright statement in the file COPYRIGHT_URI.
00028 //
00029 // Authors:
00030 //      jhrg,jimg       James Gallagher <jgallagher@gso.uri.edu>
00031 
00032 
00033 #include "config.h"
00034 
00035 #include <string>
00036 #include <algorithm>
00037 #include <functional>
00038 
00039 //#define DODS_DEBUG
00040 
00041 #include "Constructor.h"
00042 #include "Grid.h"
00043 
00044 #include "debug.h"
00045 #include "escaping.h"
00046 #include "Error.h"
00047 #include "InternalErr.h"
00048 
00049 
00050 using namespace std;
00051 
00052 namespace libdap {
00053 
00054 // Private member functions
00055 
00056 void
00057 Constructor::_duplicate(const Constructor &)
00058 {}
00059 
00060 // Public member functions
00061 
00062 Constructor::Constructor(const string &n, const Type &t)
00063         : BaseType(n, t)
00064 {}
00065 
00076 Constructor::Constructor(const string &n, const string &d, const Type &t)
00077         : BaseType(n, d, t)
00078 {}
00079 
00080 Constructor::Constructor(const Constructor &rhs) : BaseType(rhs)
00081 {}
00082 
00083 Constructor::~Constructor()
00084 {}
00085 
00086 Constructor &
00087 Constructor::operator=(const Constructor &rhs)
00088 {
00089     if (this == &rhs)
00090         return *this;
00091 
00092     dynamic_cast<BaseType &>(*this) = rhs; // run BaseType=
00093 
00094     _duplicate(rhs);
00095 
00096     return *this;
00097 }
00098 
00100 Constructor::Vars_iter
00101 Constructor::var_begin()
00102 {
00103     return _vars.begin() ;
00104 }
00105 
00121 BaseType *
00122 Constructor::find_hdf4_dimension_attribute_home(AttrTable::entry *source)
00123 {
00124     BaseType *btp;
00125     string::size_type i = source->name.find("_dim_");
00126     if (i != string::npos && (btp = var(source->name.substr(0, i)))) {
00127         if (btp->is_vector_type()) {
00128             return btp;
00129         }
00130         else if (btp->type() == dods_grid_c) {
00131             // For a Grid, the hdf4 handler uses _dim_n for the n-th Map
00132             // i+5 points to the character holding 'n'
00133             int n = atoi(source->name.substr(i + 5).c_str());
00134             DBG(cerr << "Found a Grid (" << btp->name() << ") and "
00135                 << source->name.substr(i) << ", extracted n: " << n << endl);
00136             return *(dynamic_cast<Grid&>(*btp).map_begin() + n);
00137         }
00138     }
00139 
00140     return 0;
00141 }
00142 
00145 AttrTable *
00146 Constructor::find_matching_container(AttrTable::entry *source,
00147                                      BaseType **dest_variable)
00148 {
00149     // The attribute entry 'source' must be a container
00150     if (source->type != Attr_container)
00151         throw InternalErr(__FILE__, __LINE__, "Constructor::find_matching_container");
00152 
00153     // Use the name of the attribute container 'source' to figure out where
00154     // to put its contents.
00155     BaseType *btp;
00156     if ((btp = var(source->name))) {
00157         // ... matches a variable name? Use var's table
00158         *dest_variable = btp;
00159         return &btp->get_attr_table();
00160     }
00161     // As more special-case attribute containers come to light, add clauses
00162     // here.
00163     else if ((btp = find_hdf4_dimension_attribute_home(source))) {
00164         // ... hdf4 dimension attribute? Make a sub table and use that.
00165         // btp can only be an Array or a Grid Map (which is an array)
00166         if (btp->get_parent()->type() == dods_grid_c) {
00167             DBG(cerr << "Found a Grid" << endl);
00168             *dest_variable = btp;
00169             return &btp->get_attr_table();
00170         }
00171         else { // must be a plain Array
00172             string::size_type i = source->name.find("_dim_");
00173             string ext = source->name.substr(i + 1);
00174             *dest_variable = btp;
00175             return btp->get_attr_table().append_container(ext);
00176         }
00177     }
00178     else {
00179         // ... otherwise assume it's a global attribute.
00180         AttrTable *at = get_attr_table().find_container(source->name);
00181         if (!at) {
00182             at = new AttrTable();       // Make a new global table if needed
00183             get_attr_table().append_container(at, source->name);
00184         }
00185 
00186         *dest_variable = 0;
00187         return at;
00188     }
00189 }
00190 
00208 void
00209 Constructor::transfer_attributes(AttrTable::entry * entry)
00210 {
00211     DBG(cerr << "Constructor::transfer_attributes, variable: " << name() <<
00212         endl);
00213     DBG(cerr << "Working on the '" << entry->
00214         name << "' container." << endl);
00215     if (entry->type != Attr_container)
00216         throw InternalErr(__FILE__, __LINE__,
00217                           "Constructor::transfer_attributes");
00218 
00219     AttrTable *source = entry->attributes;
00220     BaseType *dest_variable = 0;
00221     AttrTable *dest = find_matching_container(entry, &dest_variable);
00222 
00223     // foreach source attribute in the das_i container
00224     AttrTable::Attr_iter source_p = source->attr_begin();
00225     while (source_p != source->attr_end()) {
00226         DBG(cerr << "Working on the '" << (*source_p)->
00227             name << "' attribute" << endl);
00228 
00229         if ((*source_p)->type == Attr_container) {
00230             if (dest_variable && dest_variable->is_constructor_type()) {
00231                 dynamic_cast <Constructor & >(*dest_variable).transfer_attributes(*source_p);
00232             }
00233             else {
00234                 dest->append_container(new AttrTable(*(*source_p)->attributes),
00235                                        (*source_p)->name);
00236             }
00237         }
00238         else {
00239             dest->append_attr(source->get_name(source_p),
00240                               source->get_type(source_p),
00241                               source->get_attr_vector(source_p));
00242         }
00243 
00244         ++source_p;
00245     }
00246 }
00247 
00250 Constructor::Vars_iter
00251 Constructor::var_end()
00252 {
00253     return _vars.end() ;
00254 }
00255 
00257 Constructor::Vars_riter
00258 Constructor::var_rbegin()
00259 {
00260     return _vars.rbegin();
00261 }
00262 
00265 Constructor::Vars_riter
00266 Constructor::var_rend()
00267 {
00268     return _vars.rend();
00269 }
00270 
00274 Constructor::Vars_iter
00275 Constructor::get_vars_iter(int i)
00276 {
00277     return _vars.begin() + i;
00278 }
00279 
00283 BaseType *
00284 Constructor::get_var_index(int i)
00285 {
00286     return *(_vars.begin() + i);
00287 }
00288 
00289 #if FILE_METHODS
00290 void
00291 Constructor::print_decl(FILE *out, string space, bool print_semi,
00292                         bool constraint_info, bool constrained)
00293 {
00294     if (constrained && !send_p())
00295         return;
00296 
00297     fprintf(out, "%s%s {\n", space.c_str(), type_name().c_str()) ;
00298     for (Vars_citer i = _vars.begin(); i != _vars.end(); i++) {
00299         (*i)->print_decl(out, space + "    ", true,
00300                          constraint_info, constrained);
00301     }
00302     fprintf(out, "%s} %s", space.c_str(), id2www(name()).c_str()) ;
00303 
00304     if (constraint_info) { // Used by test drivers only.
00305         if (send_p())
00306             cout << ": Send True";
00307         else
00308             cout << ": Send False";
00309     }
00310 
00311     if (print_semi)
00312         fprintf(out, ";\n") ;
00313 }
00314 #endif
00315 
00316 void
00317 Constructor::print_decl(ostream &out, string space, bool print_semi,
00318                         bool constraint_info, bool constrained)
00319 {
00320     if (constrained && !send_p())
00321         return;
00322 
00323     out << space << type_name() << " {\n" ;
00324     for (Vars_citer i = _vars.begin(); i != _vars.end(); i++) {
00325         (*i)->print_decl(out, space + "    ", true,
00326                          constraint_info, constrained);
00327     }
00328     out << space << "} " << id2www(name()) ;
00329 
00330     if (constraint_info) { // Used by test drivers only.
00331         if (send_p())
00332             out << ": Send True";
00333         else
00334             out << ": Send False";
00335     }
00336 
00337     if (print_semi)
00338         out << ";\n" ;
00339 }
00340 
00341 #if FILE_METHODS
00342 class PrintField : public unary_function<BaseType *, void>
00343 {
00344     FILE *d_out;
00345     string d_space;
00346     bool d_constrained;
00347 public:
00348     PrintField(FILE *o, string s, bool c)
00349             : d_out(o), d_space(s), d_constrained(c)
00350     {}
00351 
00352     void operator()(BaseType *btp)
00353     {
00354         btp->print_xml(d_out, d_space, d_constrained);
00355     }
00356 };
00357 
00358 void
00359 Constructor::print_xml(FILE *out, string space, bool constrained)
00360 {
00361     if (constrained && !send_p())
00362         return;
00363 
00364     bool has_attributes = false; // *** fix me
00365     bool has_variables = (var_begin() != var_end());
00366 
00367     fprintf(out, "%s<%s", space.c_str(), type_name().c_str());
00368     if (!name().empty())
00369         fprintf(out, " name=\"%s\"", id2xml(name()).c_str());
00370 
00371     if (has_attributes || has_variables) {
00372         fprintf(out, ">\n");
00373 
00374         get_attr_table().print_xml(out, space + "    ", constrained);
00375 
00376         for_each(var_begin(), var_end(),
00377                  PrintField(out, space + "    ", constrained));
00378 
00379         fprintf(out, "%s</%s>\n", space.c_str(), type_name().c_str());
00380     }
00381     else {
00382         fprintf(out, "/>\n");
00383     }
00384 }
00385 #endif
00386 
00387 class PrintFieldStrm : public unary_function<BaseType *, void>
00388 {
00389     ostream &d_out;
00390     string d_space;
00391     bool d_constrained;
00392 public:
00393     PrintFieldStrm(ostream &o, string s, bool c)
00394             : d_out(o), d_space(s), d_constrained(c)
00395     {}
00396 
00397     void operator()(BaseType *btp)
00398     {
00399         btp->print_xml(d_out, d_space, d_constrained);
00400     }
00401 };
00402 
00403 void
00404 Constructor::print_xml(ostream &out, string space, bool constrained)
00405 {
00406     if (constrained && !send_p())
00407         return;
00408 
00409     bool has_attributes = false; // *** fix me
00410     bool has_variables = (var_begin() != var_end());
00411 
00412     out << space << "<" << type_name() ;
00413     if (!name().empty())
00414         out << " name=\"" << id2xml(name()) << "\"" ;
00415 
00416     if (has_attributes || has_variables) {
00417         out << ">\n" ;
00418 
00419         get_attr_table().print_xml(out, space + "    ", constrained);
00420 
00421         for_each(var_begin(), var_end(),
00422                  PrintFieldStrm(out, space + "    ", constrained));
00423 
00424         out << space << "</" << type_name() << ">\n" ;
00425     }
00426     else {
00427         out << "/>\n" ;
00428     }
00429 }
00430 
00443 bool
00444 Constructor::is_linear()
00445 {
00446     return false;
00447 }
00448 
00457 void
00458 Constructor::dump(ostream &strm) const
00459 {
00460     strm << DapIndent::LMarg << "Constructor::dump - ("
00461     << (void *)this << ")" << endl ;
00462     DapIndent::Indent() ;
00463     BaseType::dump(strm) ;
00464     strm << DapIndent::LMarg << "vars: " << endl ;
00465     DapIndent::Indent() ;
00466     Vars_citer i = _vars.begin() ;
00467     Vars_citer ie = _vars.end() ;
00468     for (; i != ie; i++) {
00469         (*i)->dump(strm) ;
00470     }
00471     DapIndent::UnIndent() ;
00472     DapIndent::UnIndent() ;
00473 }
00474 
00475 } // namespace libdap
00476 

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