+
+static void snippet_xml_record(ZebraHandle zh, WRBUF wrbuf, zebra_snippets *doc)
+{
+ const zebra_snippet_word *doc_w;
+ int mark_state = 0;
+
+ wrbuf_printf(wrbuf, "%s>\n", ZEBRA_XML_HEADER_STR);
+ for (doc_w = zebra_snippets_constlist(doc); doc_w; doc_w = doc_w->next)
+ {
+ if (doc_w->mark)
+ {
+ const char *index_type;
+ const char *db = 0;
+ const char *string_index = 0;
+
+ zebraExplain_lookup_ord(zh->reg->zei, doc_w->ord,
+ &index_type, &db, &string_index);
+
+ if (mark_state == 0)
+ {
+ wrbuf_printf(wrbuf, " <snippet name=\"%s\"", string_index);
+ wrbuf_printf(wrbuf, " type=\"%s\">", index_type);
+ }
+ if (doc_w->match)
+ wrbuf_puts(wrbuf, "<s>");
+ /* not printing leading ws */
+ if (mark_state || !doc_w->ws || doc_w->match)
+ wrbuf_xmlputs(wrbuf, doc_w->term);
+ if (doc_w->match)
+ wrbuf_puts(wrbuf, "</s>");
+ }
+ else if (mark_state == 1)
+ {
+ wrbuf_puts(wrbuf, "</snippet>\n");
+ }
+ mark_state = doc_w->mark;
+ }
+ if (mark_state == 1)
+ {
+ wrbuf_puts(wrbuf, "</snippet>\n");
+ }
+ wrbuf_printf(wrbuf, "</record>");
+}
+
+int zebra_get_rec_snippets(ZebraHandle zh, zint sysno,
+ zebra_snippets *snippets)
+{
+ int return_code = 0;
+ Record rec = rec_get(zh->reg->records, sysno);
+ if (!rec)
+ {
+ yaz_log(YLOG_WARN, "rec_get fail on sysno=" ZINT_FORMAT, sysno);
+ return_code = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
+ }
+ else
+ {
+ const char *file_type = rec->info[recInfo_fileType];
+ void *recTypeClientData;
+ RecType rt = recType_byName(zh->reg->recTypes, zh->res,
+ file_type, &recTypeClientData);
+
+ if (!rt)
+ return_code = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
+ else
+ {
+ struct ZebraRecStream stream;
+ return_code = zebra_create_record_stream(zh, &rec, &stream);
+ if (return_code == 0)
+ {
+ extract_snippet(zh, snippets, &stream,
+ rt, recTypeClientData);
+
+ stream.destroy(&stream);
+ }
+ }
+ rec_free(&rec);
+ }
+ return return_code;
+}
+
+static int snippet_fetch(ZebraHandle zh, const char *setname,
+ zint sysno, ODR odr,
+ const char *elemsetname,
+ const Odr_oid *input_format,
+ const Odr_oid **output_format,
+ char **rec_bufp, int *rec_lenp)
+{
+ zebra_snippets *rec_snippets = zebra_snippets_create();
+ int return_code = zebra_get_rec_snippets(zh, sysno, rec_snippets);
+
+ if (!return_code)
+ {
+ WRBUF wrbuf = wrbuf_alloc();
+ zebra_snippets *hit_snippet = zebra_snippets_create();
+
+ zebra_snippets_hit_vector(zh, setname, sysno, hit_snippet);
+
+#if 0
+ /* for debugging purposes */
+ yaz_log(YLOG_LOG, "---------------------------");
+ yaz_log(YLOG_LOG, "REC SNIPPET:");
+ zebra_snippets_log(rec_snippet, YLOG_LOG, 1);
+ yaz_log(YLOG_LOG, "---------------------------");
+ yaz_log(YLOG_LOG, "HIT SNIPPET:");
+ zebra_snippets_log(hit_snippet, YLOG_LOG, 1);
+#endif
+
+ zebra_snippets_ring(rec_snippets, hit_snippet, 5, 5);
+
+#if 0
+ yaz_log(YLOG_LOG, "---------------------------");
+ yaz_log(YLOG_LOG, "RING SNIPPET:");
+ zebra_snippets_log(rec_snippets, YLOG_LOG, 1);
+#endif
+ snippet_xml_record(zh, wrbuf, rec_snippets);
+
+ *output_format = yaz_oid_recsyn_xml;
+
+ if (return_code == 0)
+ {
+ *rec_lenp = wrbuf_len(wrbuf);
+ *rec_bufp = odr_strdup(odr, wrbuf_cstr(wrbuf));
+ }
+ wrbuf_destroy(wrbuf);
+ zebra_snippets_destroy(hit_snippet);
+ }
+ zebra_snippets_destroy(rec_snippets);
+ return return_code;
+}
+
+struct term_collect {
+ const char *term;
+ int oc;
+ zint set_occur;
+};
+
+zint freq_term(ZebraHandle zh, int ord, const char *term, RSET rset_set)
+{
+ struct rset_key_control *kc = zebra_key_control_create(zh);
+ char ord_buf[IT_MAX_WORD];
+ int ord_len = key_SU_encode(ord, ord_buf);
+ char *info;
+ zint hits = 0;
+ NMEM nmem = nmem_create();
+
+ strcpy(ord_buf + ord_len, term);
+
+ info = dict_lookup(zh->reg->dict, ord_buf);
+ if (info)
+ {
+ ISAM_P isam_p;
+ RSET rsets[2], rset;
+ memcpy(&isam_p, info+1, sizeof(ISAM_P));
+
+ rsets[0] = zebra_create_rset_isam(zh, nmem, kc, kc->scope, isam_p, 0);
+ rsets[1] = rset_dup(rset_set);
+
+ rset = rset_create_and(nmem, kc, kc->scope, 2, rsets);
+
+ zebra_count_set(zh, rset, &hits, zh->approx_limit);
+
+ rset_delete(rsets[0]);
+ rset_delete(rset);
+ }
+ (*kc->dec)(kc);
+ nmem_destroy(nmem);
+ return hits;
+}
+
+int term_qsort_handle(const void *a, const void *b)
+{
+ const struct term_collect *l = a;
+ const struct term_collect *r = b;
+ if (l->set_occur < r->set_occur)
+ return 1;
+ else if (l->set_occur > r->set_occur)
+ return -1;
+ else
+ {
+ const char *lterm = l->term ? l->term : "";
+ const char *rterm = r->term ? r->term : "";
+ return strcmp(lterm, rterm);
+ }
+}
+
+void term_collect_freq(ZebraHandle zh,
+ struct term_collect *col, int no_terms_collect,
+ int ord, RSET rset)
+{
+ int i;
+ for (i = 0; i < no_terms_collect; i++)
+ {
+ if (col[i].term)
+ col[i].set_occur = freq_term(zh, ord, col[i].term, rset);
+ }
+ qsort(col, no_terms_collect, sizeof(*col), term_qsort_handle);
+}
+
+struct term_collect *term_collect_create(zebra_strmap_t sm,
+ int no_terms_collect,
+ NMEM nmem)
+{
+ const char *term;
+ void *data_buf;
+ size_t data_len;
+ zebra_strmap_it it;
+ struct term_collect *col = nmem_malloc(nmem,
+ sizeof *col *no_terms_collect);
+ int i;
+ for (i = 0; i < no_terms_collect; i++)
+ {
+ col[i].term = 0;
+ col[i].oc = 0;
+ col[i].set_occur = 0;
+ }
+ /* iterate over terms and collect the most frequent ones */
+ it = zebra_strmap_it_create(sm);
+ while ((term = zebra_strmap_it_next(it, &data_buf, &data_len)))
+ {
+ /* invariant:
+ col[0] has lowest oc . col[no_terms_collect-1] has highest oc */
+ int oc = *(int*) data_buf;
+ int j = 0;
+ /* insertion may be slow but terms terms will be "infrequent" and
+ thus number of iterations should be small below
+ */
+ while (j < no_terms_collect && oc > col[j].oc)
+ j++;
+ if (j)
+ { /* oc <= col[j] and oc > col[j-1] */
+ --j;
+ memmove(col, col+1, sizeof(*col) * j);
+ col[j].term = term;
+ col[j].oc = oc;
+ }
+ }
+ zebra_strmap_it_destroy(it);
+ return col;
+}
+
+static ZEBRA_RES facet_fetch(ZebraHandle zh, const char *setname,
+ ODR odr,
+ const char *elemsetname,
+ const Odr_oid *input_format,
+ const Odr_oid **output_format,
+ char **rec_bufp, int *rec_lenp)
+{
+ zint *pos_array;
+ int i;
+ int num_recs = 10; /* number of records to analyze */
+ ZebraMetaRecord *poset;
+ ZEBRA_RES ret = ZEBRA_OK;
+ int *ord_array;
+ WRBUF wr = wrbuf_alloc();
+ int use_xml = 0;
+
+ int no_ord = 0;
+ struct index_spec *spec, *spec_list;
+ int error;
+
+ /* see if XML is required for response */
+ if (oid_oidcmp(input_format, yaz_oid_recsyn_xml) == 0)
+ use_xml = 1;
+
+ spec_list = parse_index_spec(elemsetname, odr_getmem(odr), &error);
+
+ if (!spec_list || error)
+ {
+ zebra_setError(
+ zh,
+ YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_,
+ 0);
+ return ZEBRA_FAIL;
+ }
+
+ for (spec = spec_list; spec; spec = spec->next)
+ {
+ if (!spec->index_type)
+ {
+ zebra_setError(
+ zh,
+ YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_,
+ 0);
+ return ZEBRA_FAIL;
+ }
+ no_ord++;
+ }
+
+ ord_array = odr_malloc(odr, sizeof(*ord_array) * no_ord);
+
+ for (spec = spec_list, i = 0; spec; spec = spec->next, i++)
+ {
+ int ord = zebraExplain_lookup_attr_str(zh->reg->zei,
+ zinfo_index_category_index,
+ spec->index_type,
+ spec->index_name);
+ if (ord == -1)
+ {
+ zebra_setError(
+ zh,
+ YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_,
+ 0);
+ return ZEBRA_FAIL;
+ }
+ ord_array[i] = ord;
+ }
+ pos_array = (zint *) odr_malloc(odr, num_recs * sizeof(*pos_array));
+ for (i = 0; i < num_recs; i++)
+ pos_array[i] = i+1;
+ poset = zebra_meta_records_create(zh, setname, num_recs, pos_array);
+ if (!poset)
+ {
+ zebra_setError(zh, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
+ setname);
+ ret = ZEBRA_FAIL;
+ }
+ else
+ {
+ yaz_timing_t timing = yaz_timing_create();
+ zebra_strmap_t *map_array
+ = odr_malloc(odr, sizeof *map_array * no_ord);
+ for (i = 0; i < no_ord; i++)
+ map_array[i] = zebra_strmap_create();
+
+ for (i = 0; i < num_recs; i++)
+ {
+ int j;
+ zint sysnos[MAX_SYSNOS_PER_RECORD];
+ int no_sysnos = MAX_SYSNOS_PER_RECORD;
+ if (!poset[i].sysno)
+ continue;
+ ret = zebra_result_recid_to_sysno(zh, setname,
+ poset[i].sysno,
+ sysnos, &no_sysnos);
+ assert(no_sysnos > 0);
+ for (j = 0; j < no_sysnos; j++)
+ {
+ size_t slen;
+ const char *str;
+ struct it_key key_in;
+ Record rec = rec_get(zh->reg->records, sysnos[j]);
+ zebra_rec_keys_t keys = zebra_rec_keys_open();
+ zebra_rec_keys_set_buf(keys, rec->info[recInfo_delKeys],
+ rec->size[recInfo_delKeys], 0);
+
+ if (zebra_rec_keys_rewind(keys))
+ {
+ while (zebra_rec_keys_read(keys, &str, &slen, &key_in))
+ {
+ int i;
+ struct index_spec *spec;
+ for (spec = spec_list, i = 0; i < no_ord;
+ i++, spec = spec->next)
+ {
+ int ord = CAST_ZINT_TO_INT(key_in.mem[0]);
+ if (ord == ord_array[i] &&
+ str[0] != FIRST_IN_FIELD_CHAR)
+ {
+ int *freq;
+ zebra_strmap_t sm = map_array[i];
+
+ freq = zebra_strmap_lookup(sm, str, 0, 0);
+ if (freq)
+ (*freq)++;
+ else
+ {
+ int v = 1;
+ zebra_strmap_add(sm, str, &v, sizeof v);
+ }
+ }
+ }
+ }
+ }
+ zebra_rec_keys_close(keys);
+ rec_free(&rec);
+ }
+ }
+ yaz_timing_stop(timing);
+ yaz_log(YLOG_LOG, "facet first phase real=%4.2f",
+ yaz_timing_get_real(timing));
+ yaz_timing_start(timing);
+ if (use_xml)
+ wrbuf_puts(wr, "<facets>\n");
+ for (spec = spec_list, i = 0; i < no_ord; i++, spec = spec->next)
+ {
+ int j;
+ NMEM nmem = nmem_create();
+ struct term_collect *col;
+ int no_collect_terms = 20;
+
+ if (spec->extra)
+ no_collect_terms = atoi(spec->extra);
+ if (no_collect_terms < 1)
+ no_collect_terms = 1;
+ col = term_collect_create(map_array[i], no_collect_terms, nmem);
+ term_collect_freq(zh, col, no_collect_terms, ord_array[i],
+ resultSetRef(zh, setname));
+
+ if (use_xml)
+ wrbuf_printf(wr, " <facet type=\"%s\" index=\"%s\">\n",
+ spec->index_type, spec->index_name);
+ else
+ wrbuf_printf(wr, "facet %s %s\n",
+ spec->index_type, spec->index_name);
+ for (j = 0; j < no_collect_terms; j++)
+ {
+ if (col[j].term)
+ {
+ char dst_buf[IT_MAX_WORD];
+ zebra_term_untrans(zh, spec->index_type, dst_buf, col[j].term);
+ if (use_xml)
+ {
+ wrbuf_printf(wr, " <term coccur=\"%d\"", col[j].oc);
+ if (col[j].set_occur)
+ wrbuf_printf(wr, " occur=\"" ZINT_FORMAT "\"",
+ col[j].set_occur);
+ wrbuf_printf(wr, ">");
+ wrbuf_xmlputs(wr, dst_buf);
+ wrbuf_printf(wr, "</term>\n");
+ }
+ else
+ {
+ wrbuf_printf(wr, "term %d", col[j].oc);
+ if (col[j].set_occur)
+ wrbuf_printf(wr, " " ZINT_FORMAT,
+ col[j].set_occur);
+ wrbuf_printf(wr, ": %s\n", dst_buf);
+ }
+ }
+ }
+ if (use_xml)
+ wrbuf_puts(wr, " </facet>\n");
+ nmem_destroy(nmem);
+ }
+ if (use_xml)
+ wrbuf_puts(wr, "</facets>\n");
+ for (i = 0; i < no_ord; i++)
+ zebra_strmap_destroy(map_array[i]);
+ yaz_timing_stop(timing);
+ yaz_log(YLOG_LOG, "facet second phase real=%4.2f",
+ yaz_timing_get_real(timing));
+ yaz_timing_destroy(&timing);
+ }
+ *rec_bufp = odr_strdup(odr, wrbuf_cstr(wr));
+ wrbuf_destroy(wr);
+ *rec_lenp = strlen(*rec_bufp);
+ *output_format = yaz_oid_recsyn_xml;
+
+ zebra_meta_records_destroy(zh, poset, num_recs);
+ return ret;
+}
+
+int zebra_special_fetch(ZebraHandle zh, const char *setname,
+ zint sysno, int score, ODR odr,
+ const char *elemsetname,
+ const Odr_oid *input_format,
+ const Odr_oid **output_format,
+ char **rec_bufp, int *rec_lenp)