1 /* This file is part of the YAZ toolkit.
2 * Copyright (C) 1995-2013 Index Data
3 * See the file LICENSE for details.
8 * \brief Facet utilities
15 #include <yaz/facet.h>
16 #include <yaz/diagbib1.h>
17 #include <yaz/oid_db.h>
18 #include <yaz/oid_std.h>
19 #include <yaz/otherinfo.h>
20 #include <yaz/pquery.h>
23 void yaz_oi_set_facetlist(
24 Z_OtherInformation **otherInformation, ODR odr,
25 Z_FacetList *facet_list)
27 int categoryValue = 1;
28 Z_External *z_external = 0;
29 Z_OtherInformationUnit *oi =
30 yaz_oi_update(otherInformation, odr, yaz_oid_userinfo_facet_1,
34 oi->which = Z_OtherInfo_externallyDefinedInfo;
35 z_external = odr_malloc(odr, sizeof(*z_external));
36 z_external->which = Z_External_userFacets;
37 z_external->direct_reference = odr_oiddup(odr, yaz_oid_userinfo_facet_1);
38 z_external->indirect_reference = 0;
39 z_external->descriptor = 0;
40 z_external->u.facetList = facet_list;
41 oi->information.externallyDefinedInfo = z_external;
44 Z_FacetList *yaz_oi_get_facetlist(Z_OtherInformation **otherInformation)
46 Z_OtherInformation *oi = *otherInformation;
50 for (i = 0; i < oi->num_elements; i++)
52 Z_OtherInformationUnit *oiu = oi->list[i];
53 if (oiu->which == Z_OtherInfo_externallyDefinedInfo
54 && oiu->information.externallyDefinedInfo->which ==
55 Z_External_userFacets)
57 return oiu->information.externallyDefinedInfo->u.facetList;
64 /* Little helper to extract a string attribute */
65 /* Gets the first string, there is usually only one */
66 /* in case of errors, returns null */
68 void yaz_facet_attr_init(struct yaz_facet_attr *attr_values)
70 attr_values->errcode = 0;
71 attr_values->errstring = 0;
72 attr_values->relation = 0;
73 attr_values->useattr = 0;
74 attr_values->useattrbuff[0] = 0;
75 attr_values->limit = 0;
78 static const char *stringattr(Z_ComplexAttribute *c)
81 Z_StringOrNumeric *son;
82 for (i = 0; i < c->num_list; i++)
85 if ( son->which == Z_StringOrNumeric_string)
91 /* Use attribute, @attr1, can be numeric or string */
92 static void useattr(Z_AttributeElement *ae, struct yaz_facet_attr *av)
95 if (ae->which == Z_AttributeValue_complex)
97 s = stringattr(ae->value.complex);
103 { /* already seen one, can't have duplicates */
104 av->errcode = YAZ_BIB1_UNSUPP_ATTRIBUTE_COMBI;
105 av->errstring = "multiple use attributes";
109 { /* complex that did not return a string */
110 av->errcode = YAZ_BIB1_UNSUPP_ATTRIBUTE_COMBI;
111 av->errstring = "non-string complex attribute";
115 { /* numeric - could translate 4 to 'title' etc */
116 sprintf(av->useattrbuff, ODR_INT_PRINTF, *ae->value.numeric);
117 av->useattr = av->useattrbuff;
122 static void sortorderattr(Z_AttributeElement *ae, struct yaz_facet_attr *av)
124 if (ae->which == Z_AttributeValue_numeric)
126 if (*ae->value.numeric == 0)
127 av->relation = "desc";
128 else if (*ae->value.numeric == 1)
129 av->relation = "asc";
130 else if (*ae->value.numeric == 3)
131 av->relation = "unknown/unordered";
134 av->errcode = YAZ_BIB1_UNSUPP_RELATION_ATTRIBUTE;
135 sprintf(av->useattrbuff, ODR_INT_PRINTF,
136 *ae-> attributeType);
137 av->errstring = av->useattrbuff;
142 av->errcode = YAZ_BIB1_UNSUPP_RELATION_ATTRIBUTE;
143 av->errstring = "non-numeric relation attribute";
147 static void limitattr(Z_AttributeElement *ae, struct yaz_facet_attr *av)
149 if (ae->which == Z_AttributeValue_numeric)
151 av->limit = *ae->value.numeric;
155 av->errcode = YAZ_BIB1_UNSUPP_ATTRIBUTE;
156 av->errstring = "non-numeric limit attribute";
160 /* Get the index to be searched from the attributes.
162 can be either "string", or some well-known value like
164 Returns a null and sets errors in rr,
165 emtpy string if no attr found,
166 or the string itself - always a pointer to the Z-structs,
167 so no need to free that string!
170 void yaz_facet_attr_get_z_attributes(const Z_AttributeList *attributes,
171 struct yaz_facet_attr *av)
174 Z_AttributeElement *ae;
175 for (i = 0; i < attributes->num_attributes; i++)
177 ae = attributes->attributes[i];
178 /* ignoring the attributeSet here */
179 if (*ae->attributeType == 1)
180 { /* use attribute */
183 else if (*ae->attributeType == 2)
185 sortorderattr(ae, av);
187 else if (*ae->attributeType == 3)
192 { /* unknown attribute */
193 av->errcode = YAZ_BIB1_UNSUPP_ATTRIBUTE_TYPE;
194 sprintf(av->useattrbuff, ODR_INT_PRINTF,
195 *ae-> attributeType);
196 av->errstring = av->useattrbuff;
197 yaz_log(YLOG_WARN, "Unsupported attribute type %s", av->useattrbuff);
198 /* would like to give a better message, but the standard */
199 /* tells me to return the attribute type */
202 return; /* no need to dig deeper, return on first error */
208 Z_Term *term_create(ODR odr, const char *cstr)
210 Z_Term *term = odr_malloc(odr, sizeof(*term));
211 term->which = Z_Term_characterString;
212 term->u.characterString = odr_strdup(odr, cstr);
216 Z_FacetTerm* facet_term_create(ODR odr, Z_Term *term, int freq)
218 Z_FacetTerm *facet_term = odr_malloc(odr, sizeof(*facet_term));
219 facet_term->count = odr_malloc(odr, sizeof(*facet_term->count));
220 facet_term->term = term;
221 *facet_term->count = freq;
226 Z_FacetTerm *facet_term_create_cstr(ODR odr, const char *cstr, Odr_int freq)
228 Z_FacetTerm *facet_term = odr_malloc(odr, sizeof(*facet_term));
229 Z_Term *term = z_Term_create(odr, Z_Term_general, cstr, strlen(cstr));
230 facet_term->term = term;
231 facet_term->count = odr_intdup(odr, freq);
235 Z_FacetField* facet_field_create(ODR odr, Z_AttributeList *attributes,
238 Z_FacetField *facet_field = odr_malloc(odr, sizeof(*facet_field));
239 facet_field->attributes = attributes;
240 facet_field->num_terms = num_terms;
241 facet_field->terms = odr_malloc(odr, num_terms * sizeof(*facet_field->terms));
245 void facet_field_term_set(ODR odr, Z_FacetField *field,
246 Z_FacetTerm *facet_term, int index)
248 assert(0 <= index && index < field->num_terms);
249 field->terms[index] = facet_term;
252 Z_FacetList* facet_list_create(ODR odr, int num_facets)
254 Z_FacetList *facet_list = odr_malloc(odr, sizeof(*facet_list));
255 facet_list->num = num_facets;
256 facet_list->elements =
257 odr_malloc(odr, facet_list->num * sizeof(*facet_list->elements));
261 void facet_list_field_set(ODR odr, Z_FacetList *list, Z_FacetField *field,
264 assert(0 <= index && index < list->num);
265 list->elements[index] = field;
271 * c-file-style: "Stroustrup"
272 * indent-tabs-mode: nil
274 * vim: shiftwidth=4 tabstop=8 expandtab