1 | /**********************************************************************
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2 | *
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3 | * z3950proxy.h --
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4 | * Copyright (C) 2000 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 | #ifndef Z3950PROXY_H
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27 | #define Z3050PROXY_H
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28 |
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29 | #include "comtypes.h"
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30 |
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31 | // each "proxy to server" (i.e. collection) consists of a {z39.50 server + database} pair.
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32 | class z3950_proxy {
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33 | protected:
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34 | text_t title; // Descriptive name
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35 | text_t z_initstr; // a string returned when the connection is initialised.
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36 | text_tmap meta; // metadata for this collection (ie server/database pair)
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37 | text_tmap format;
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38 | text_tmap about; // langauge/abouttext pair for collection.
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39 | ShortColInfo_t *info; // has (database) name, host and port
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40 | text_tarray *titles;
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41 | bool connect();
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42 | bool connected; // tcp connection to the z39.50 server (target)
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43 | bool gotsinglerecord; // if we do, then we don't need all titles...
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44 |
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45 | public:
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46 | z3950_proxy();
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47 | ~z3950_proxy();
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48 | void setName(const text_t &newname);
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49 | const text_t getName() {return title;}
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50 | void setMeta(const text_t &key, const text_t &value);
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51 | const text_tmap *getMeta() {return &meta;}
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52 | const text_tmap *getFormat() {return &format;}
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53 | void setInfo(ShortColInfo_t *newinfo) {info=newinfo;}
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54 | const ShortColInfo_t *getInfo() {return info;}
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55 | void addcfgAbout(const text_t &lang, const text_t &abouttext);
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56 | bool getcfgAbout(const text_t &lang, text_t &abouttext);
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57 | // now the functions that actually talk to the target (ie zserver) over tcp
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58 | text_t &getzAbout(); // gets any name, id, MOTD, etc from server.
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59 | text_tarray *getrecordTitles(const text_t &query,
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60 | const int andor_querytype,
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61 | const text_t &fields,
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62 | const int first, const int count,
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63 | int *nummatches, comerror_t &err);
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64 | /* only get one record at a time? (Eventually we could buffer them, but
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65 | for now... */
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66 | bool getfullrecord(const text_t &query, const int andor_querytype,
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67 | const text_t &fields,
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68 | const int ID, text_t &rettitle,
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69 | text_t &rettext,comerror_t &err);
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70 | private:
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71 | void parseQuery(const text_t &query, const int andor_querytype,
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72 | const text_t &fields,
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73 | text_t &parsed_query);
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74 | text_t previousquery; // for caching purposes
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75 | };
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76 |
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77 | typedef vector<z3950_proxy *> z3950_proxy_array;
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78 |
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79 | #endif
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