1 | /**********************************************************************
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2 | *
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3 | * recptproto.h --
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4 | * Copyright (C) 1999 The New Zealand Digital Library Project
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5 | *
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6 | * A component of the Greenstone digital library software
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7 | * from the New Zealand Digital Library Project at the
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8 | * University of Waikato, New Zealand.
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9 | *
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10 | * This program is free software; you can redistribute it and/or modify
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11 | * it under the terms of the GNU General Public License as published by
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12 | * the Free Software Foundation; either version 2 of the License, or
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13 | * (at your option) any later version.
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14 | *
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15 | * This program is distributed in the hope that it will be useful,
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16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | * GNU General Public License for more details.
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19 | *
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20 | * You should have received a copy of the GNU General Public License
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21 | * along with this program; if not, write to the Free Software
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22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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23 | *
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24 | *********************************************************************/
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25 |
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26 |
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27 | #ifndef RECPTPROTO_H
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28 | #define RECPTPROTO_H
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29 |
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30 | #include "gsdlconf.h"
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31 | #include "text_t.h"
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32 | #include "comtypes.h"
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33 |
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34 | #if defined(GSDL_USE_OBJECTSPACE)
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35 | # include <ospace\std\vector>
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36 | #elif defined(GSDL_USE_STL_H)
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37 | # include <vector.h>
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38 | #else
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39 | # include <vector>
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40 | #endif
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41 |
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42 | #if defined(GSDL_USE_OBJECTSPACE)
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43 | # include <ospace\std\iostream>
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44 | #elif defined(GSDL_USE_IOS_H)
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45 | # include <iostream.h>
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46 | #else
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47 | # include <iostream>
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48 | #endif
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49 |
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50 |
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51 | // recptproto is a generalisation of a protocol for communicating
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52 | // with a collection server.
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53 | class recptproto {
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54 | public:
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55 |
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56 | recptproto() {};
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57 | virtual ~recptproto() {};
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58 |
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59 | // add collection server to protocol
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60 | virtual void add_collection (const text_t &collection, void *recpt,
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61 | const text_t &gsdlhome, const text_t& collecthome,
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62 | const text_t &dbhome);
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63 |
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64 | virtual void remove_collection (const text_t &collection, ostream &logout);
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65 |
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66 | // configure should be called for each line in the configuration file
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67 | virtual void configure (const text_t &key, const text_tarray &cfgline, comerror_t &err);
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68 |
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69 | // init should be called after the configuration but before any other
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70 | // functions are called. If init returns false a message will be written
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71 | // out to the log file and no other output should be produced.
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72 | virtual bool init (comerror_t &err, ostream &logout);
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73 |
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74 | // get_site_name should return the name of the site used.
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75 | // This is trivially empty in the case of a null protocol. If a remote
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76 | // connection to a site is being used then this should return the name
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77 | // used to label a site
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78 | virtual text_t get_site_name(comerror_t &err);
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79 |
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80 | // get_protocol_name should return the name of this protocol (e.g. recptproto)
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81 | // that can be used to do run time type identification and display information
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82 | // about the protocol.
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83 | virtual text_t get_protocol_name (comerror_t &err);
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84 |
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85 | // get_collection_list returns the list of collections that
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86 | // this protocol knows about
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87 | virtual void get_collection_list (text_tarray &collist, comerror_t &err,
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88 | ostream &logout);
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89 |
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90 | // has_collection sets 'hascollection' to be true if the protocol
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91 | // can communicate with the collection (i.e. it is within its
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92 | // collection list). This function should be implemented in as
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93 | // efficient time as possible as it will be called for each page
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94 | // access and for each protocol.
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95 | virtual void has_collection (const text_t &collection, bool &hascollection,
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96 | comerror_t &err, ostream &logout);
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97 |
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98 | // sets 'wassuccess' to be true if a successful ping was done to
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99 | // the given collection.
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100 | virtual void ping (const text_t &collection, bool &wassuccess,
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101 | comerror_t &err, ostream &logout);
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102 |
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103 | // obtains general information about the collection
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104 | virtual void get_collectinfo (const text_t &collection,
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105 | ColInfoResponse_t &collectinfo,
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106 | comerror_t &err, ostream &logout);
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107 |
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108 | // gets a list of all the filters
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109 | virtual void get_filterinfo (const text_t &collection,
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110 | InfoFiltersResponse_t &response,
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111 | comerror_t &err, ostream &logout);
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112 |
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113 | // gets all the filter options for a particular filter
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114 | virtual void get_filteroptions (const text_t &collection,
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115 | const InfoFilterOptionsRequest_t &request,
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116 | InfoFilterOptionsResponse_t &response,
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117 | comerror_t &err, ostream &logout);
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118 |
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119 | // filters (search or browse) a result set and returns information
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120 | // about the filtered set including term frequency information and
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121 | // metadata
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122 | virtual void filter (const text_t &collection,
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123 | FilterRequest_t &request,
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124 | FilterResponse_t &response,
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125 | comerror_t &err, ostream &logout);
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126 |
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127 | // gets a document (duh!)
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128 | virtual void get_document (const text_t &collection,
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129 | const DocumentRequest_t &request,
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130 | DocumentResponse_t &response,
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131 | comerror_t &err, ostream &logout);
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132 |
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133 | virtual void is_searchable (const text_t &collection, bool &issearchable,
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134 | comerror_t &err, ostream &logout);
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135 |
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136 | };
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137 |
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138 |
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139 | // The recptprotoptr function does not 'own' the recptproto. The
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140 | // recptproto should be deleted by the code which created it.
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141 | class recptprotoptr {
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142 | public:
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143 | recptproto *p;
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144 |
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145 | recptprotoptr () {p=NULL;}
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146 | ~recptprotoptr () {}
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147 | };
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148 |
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149 | typedef vector<recptprotoptr> recptprotoptrlist;
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150 |
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151 |
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152 | // contains a list of recptprotos
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153 | class recptprotolistclass {
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154 | protected:
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155 | recptprotoptrlist recptprotoptrs;
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156 |
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157 | public:
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158 | // type support for recptprotolistclass
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159 | typedef recptprotoptrlist::iterator iterator;
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160 | typedef recptprotoptrlist::const_iterator const_iterator;
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161 | typedef recptprotoptrlist::reference reference;
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162 | typedef recptprotoptrlist::const_reference const_reference;
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163 | typedef recptprotoptrlist::size_type size_type;
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164 |
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165 | typedef recptprotoptrlist::difference_type difference_type;
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166 | typedef recptprotoptrlist::const_reverse_iterator const_reverse_iterator;
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167 | typedef recptprotoptrlist::reverse_iterator reverse_iterator;
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168 |
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169 | // basic container support
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170 | iterator begin () {return recptprotoptrs.begin();}
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171 | const_iterator begin () const {return recptprotoptrs.begin();}
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172 | iterator end () {return recptprotoptrs.end();}
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173 | const_iterator end () const {return recptprotoptrs.end();}
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174 |
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175 | void erase(iterator pos) {recptprotoptrs.erase(pos);}
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176 | void erase(iterator first, iterator last) {recptprotoptrs.erase(first, last);}
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177 | recptprotolistclass &operator=(const recptprotolistclass &x)
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178 | {recptprotoptrs=x.recptprotoptrs;return *this;}
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179 |
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180 | bool empty () const {return recptprotoptrs.empty();}
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181 | size_type size() const {return recptprotoptrs.size();}
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182 |
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183 |
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184 | // added functionality
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185 | void clear () {recptprotoptrs.erase(recptprotoptrs.begin(),recptprotoptrs.end());}
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186 |
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187 | // therecptproto remains the property of the calling code but
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188 | // should not be deleted until it is removed from this list.
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189 | void addrecptproto (recptproto *therecptproto);
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190 |
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191 | // getrecptproto will return NULL if a recptproto for the given collection
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192 | // could not be found
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193 | recptproto *getrecptproto (const text_t &collection, ostream &logout);
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194 | };
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195 |
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196 |
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197 | #endif
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