1 /* This file is part of the YAZ toolkit.
2 * Copyright (C) 1995-2012 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 int categoryValue = 1;
47 Z_External *z_external = 0;
48 Z_OtherInformationUnit *oi =
49 yaz_oi_update(otherInformation, 0, yaz_oid_userinfo_facet_1,
53 z_external = oi->information.externallyDefinedInfo;
55 if (z_external && z_external->which == Z_External_userFacets)
56 return z_external->u.facetList;
60 /* Little helper to extract a string attribute */
61 /* Gets the first string, there is usually only one */
62 /* in case of errors, returns null */
64 void yaz_facet_attr_init(struct yaz_facet_attr *attr_values)
66 attr_values->errcode = 0;
67 attr_values->errstring = 0;
68 attr_values->relation = 0;
69 attr_values->useattr = 0;
70 attr_values->useattrbuff[0] = 0;
71 attr_values->limit = 0;
74 static const char *stringattr(Z_ComplexAttribute *c)
77 Z_StringOrNumeric *son;
78 for (i = 0; i < c->num_list; i++)
81 if ( son->which == Z_StringOrNumeric_string)
87 /* Use attribute, @attr1, can be numeric or string */
88 static void useattr(Z_AttributeElement *ae, struct yaz_facet_attr *av)
91 if (ae->which == Z_AttributeValue_complex)
93 s = stringattr(ae->value.complex);
99 { /* already seen one, can't have duplicates */
100 av->errcode = YAZ_BIB1_UNSUPP_ATTRIBUTE_COMBI;
101 av->errstring = "multiple use attributes";
105 { /* complex that did not return a string */
106 av->errcode = YAZ_BIB1_UNSUPP_ATTRIBUTE_COMBI;
107 av->errstring = "non-string complex attribute";
111 { /* numeric - could translate 4 to 'title' etc */
112 sprintf(av->useattrbuff, ODR_INT_PRINTF, *ae->value.numeric);
113 av->useattr = av->useattrbuff;
118 static void sortorderattr(Z_AttributeElement *ae, struct yaz_facet_attr *av)
120 if (ae->which == Z_AttributeValue_numeric)
122 if (*ae->value.numeric == 0)
123 av->relation = "desc";
124 else if (*ae->value.numeric == 1)
125 av->relation = "asc";
126 else if (*ae->value.numeric == 3)
127 av->relation = "unknown/unordered";
130 av->errcode = YAZ_BIB1_UNSUPP_RELATION_ATTRIBUTE;
131 sprintf(av->useattrbuff, ODR_INT_PRINTF,
132 *ae-> attributeType);
133 av->errstring = av->useattrbuff;
138 av->errcode = YAZ_BIB1_UNSUPP_RELATION_ATTRIBUTE;
139 av->errstring = "non-numeric relation attribute";
143 static void limitattr(Z_AttributeElement *ae, struct yaz_facet_attr *av)
145 if (ae->which == Z_AttributeValue_numeric)
147 av->limit = *ae->value.numeric;
151 av->errcode = YAZ_BIB1_UNSUPP_ATTRIBUTE;
152 av->errstring = "non-numeric limit attribute";
156 /* Get the index to be searched from the attributes.
158 can be either "string", or some well-known value like
160 Returns a null and sets errors in rr,
161 emtpy string if no attr found,
162 or the string itself - always a pointer to the Z-structs,
163 so no need to free that string!
166 void yaz_facet_attr_get_z_attributes(const Z_AttributeList *attributes,
167 struct yaz_facet_attr *av)
170 Z_AttributeElement *ae;
171 for (i = 0; i < attributes->num_attributes; i++)
173 ae = attributes->attributes[i];
174 /* ignoring the attributeSet here */
175 if (*ae->attributeType == 1)
176 { /* use attribute */
179 else if (*ae->attributeType == 2)
181 sortorderattr(ae, av);
183 else if (*ae->attributeType == 3)
188 { /* unknown attribute */
189 av->errcode = YAZ_BIB1_UNSUPP_ATTRIBUTE_TYPE;
190 sprintf(av->useattrbuff, ODR_INT_PRINTF,
191 *ae-> attributeType);
192 av->errstring = av->useattrbuff;
193 yaz_log(YLOG_WARN, "Unsupported attribute type %s", av->useattrbuff);
194 /* would like to give a better message, but the standard */
195 /* tells me to return the attribute type */
198 return; /* no need to dig deeper, return on first error */
204 Z_Term *term_create(ODR odr, const char *cstr)
206 Z_Term *term = odr_malloc(odr, sizeof(*term));
207 term->which = Z_Term_characterString;
208 term->u.characterString = odr_strdup(odr, cstr);
212 Z_FacetTerm* facet_term_create(ODR odr, Z_Term *term, int freq)
214 Z_FacetTerm *facet_term = odr_malloc(odr, sizeof(*facet_term));
215 facet_term->count = odr_malloc(odr, sizeof(*facet_term->count));
216 facet_term->term = term;
217 *facet_term->count = freq;
222 Z_FacetTerm *facet_term_create_cstr(ODR odr, const char *cstr, Odr_int freq)
224 Z_FacetTerm *facet_term = odr_malloc(odr, sizeof(*facet_term));
225 Z_Term *term = z_Term_create(odr, Z_Term_general, cstr, strlen(cstr));
226 facet_term->term = term;
227 facet_term->count = odr_intdup(odr, freq);
231 Z_FacetField* facet_field_create(ODR odr, Z_AttributeList *attributes,
234 Z_FacetField *facet_field = odr_malloc(odr, sizeof(*facet_field));
235 facet_field->attributes = attributes;
236 facet_field->num_terms = num_terms;
237 facet_field->terms = odr_malloc(odr, num_terms * sizeof(*facet_field->terms));
241 void facet_field_term_set(ODR odr, Z_FacetField *field,
242 Z_FacetTerm *facet_term, int index)
244 assert(0 <= index && index < field->num_terms);
245 field->terms[index] = facet_term;
248 Z_FacetList* facet_list_create(ODR odr, int num_facets)
250 Z_FacetList *facet_list = odr_malloc(odr, sizeof(*facet_list));
251 facet_list->num = num_facets;
252 facet_list->elements =
253 odr_malloc(odr, facet_list->num * sizeof(*facet_list->elements));
257 void facet_list_field_set(ODR odr, Z_FacetList *list, Z_FacetField *field,
260 assert(0 <= index && index < list->num);
261 list->elements[index] = field;
267 * c-file-style: "Stroustrup"
268 * indent-tabs-mode: nil
270 * vim: shiftwidth=4 tabstop=8 expandtab