/* This file is part of the YAZ toolkit.
- * Copyright (C) 1995-2008 Index Data
+ * Copyright (C) 1995-2012 Index Data
* See the file LICENSE for details.
*/
-
/**
* \file
* \brief Implements RPN to CQL conversion
- *
- * Evaluation order of rules:
- *
- * always
- * relation
- * structure
- * position
- * truncation
- * index
- * relationModifier
*/
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
#include <assert.h>
#include <stdlib.h>
#include <yaz/diagbib1.h>
#include <yaz/z-core.h>
#include <yaz/wrbuf.h>
+#include <yaz/logrpn.h> /* For yaz_prox_unit_name() */
+
+static void wrbuf_vputs(const char *buf, void *client_data)
+{
+ wrbuf_write((WRBUF) client_data, buf, strlen(buf));
+}
+
+static const char *lookup_index_from_string_attr(Z_AttributeList *attributes)
+{
+ int j;
+ int server_choice = 1;
+ for (j = 0; j < attributes->num_attributes; j++)
+ {
+ Z_AttributeElement *ae = attributes->attributes[j];
+ if (*ae->attributeType == 1) /* use attribute */
+ {
+ if (ae->which == Z_AttributeValue_complex)
+ {
+ Z_ComplexAttribute *ca = ae->value.complex;
+ int i;
+ for (i = 0; i < ca->num_list; i++)
+ {
+ Z_StringOrNumeric *son = ca->list[i];
+ if (son->which == Z_StringOrNumeric_string)
+ return son->u.string;
+ }
+ }
+ server_choice = 0; /* not serverChoice because we have use attr */
+ }
+ }
+ if (server_choice)
+ return "cql.serverChoice";
+ return 0;
+}
+
+static const char *lookup_relation_index_from_attr(Z_AttributeList *attributes)
+{
+ int j;
+ for (j = 0; j < attributes->num_attributes; j++)
+ {
+ Z_AttributeElement *ae = attributes->attributes[j];
+ if (*ae->attributeType == 2) /* relation attribute */
+ {
+ if (ae->which == Z_AttributeValue_numeric)
+ {
+ /* Only support for numeric relation */
+ Odr_int *relation = ae->value.numeric;
+ /* map this numeric to representation in CQL */
+ switch (*relation)
+ {
+ /* Unsure on whether this is the relation attribute constants? */
+ case Z_ProximityOperator_Prox_lessThan:
+ return "<";
+ case Z_ProximityOperator_Prox_lessThanOrEqual:
+ return "<=";
+ case Z_ProximityOperator_Prox_equal:
+ return "=";
+ case Z_ProximityOperator_Prox_greaterThanOrEqual:
+ return ">=";
+ case Z_ProximityOperator_Prox_greaterThan:
+ return ">";
+ case Z_ProximityOperator_Prox_notEqual:
+ return "<>";
+ case 100:
+ /* phonetic is not supported in CQL */
+ return 0;
+ case 101:
+ /* stem is not supported in CQL */
+ return 0;
+ case 102:
+ /* relevance is supported in CQL, but not implemented yet */
+ return 0;
+ default:
+ /* Invalid relation */
+ return 0;
+ }
+ }
+ else {
+ /* Can we have a complex relation value?
+ Should we implement something?
+ */
+ }
+ }
+ }
+ return "=";
+}
static int rpn2cql_attr(cql_transform_t ct,
- void (*pr)(const char *buf, void *client_data),
- void *client_data,
Z_AttributeList *attributes, WRBUF w)
{
- int i;
- for (i = 0; i < attributes->num_attributes; i++)
+ const char *relation = cql_lookup_reverse(ct, "relation.", attributes);
+ const char *index = cql_lookup_reverse(ct, "index.", attributes);
+ const char *structure = cql_lookup_reverse(ct, "structure.", attributes);
+
+ /* if transform (properties) do not match, we'll just use a USE string attribute (bug #2978) */
+ if (!index)
+ index = lookup_index_from_string_attr(attributes);
+
+ /* Attempt to fix bug #2978: Look for a relation attribute */
+ if (!relation)
+ relation = lookup_relation_index_from_attr(attributes);
+
+ if (!index)
+ {
+ cql_transform_set_error(ct,
+ YAZ_BIB1_UNSUPP_USE_ATTRIBUTE, 0);
+ return -1;
+ }
+ /* for serverChoice we omit index+relation+structure */
+ if (strcmp(index, "cql.serverChoice"))
{
- Z_AttributeElement *elem = attributes->attributes[i];
+ wrbuf_puts(w, index);
+ if (relation)
+ {
+ if (!strcmp(relation, "exact"))
+ relation = "==";
+ else if (!strcmp(relation, "eq"))
+ relation = "=";
+ else if (!strcmp(relation, "le"))
+ relation = "<=";
+ else if (!strcmp(relation, "ge"))
+ relation = ">=";
+ /* Missing mapping of not equal, phonetic, stem and relevance */
+ wrbuf_puts(w, relation);
+ }
+ else
+ wrbuf_puts(w, "=");
+
+ if (structure)
+ {
+ if (strcmp(structure, "*"))
+ {
+ wrbuf_puts(w, "/");
+ wrbuf_puts(w, structure);
+ wrbuf_puts(w, " ");
+ }
+ }
}
return 0;
}
+static Odr_int lookup_truncation(Z_AttributeList *attributes)
+{
+ int j;
+ for (j = 0; j < attributes->num_attributes; j++)
+ {
+ Z_AttributeElement *ae = attributes->attributes[j];
+ if (*ae->attributeType == 5) /* truncation attribute */
+ {
+ if (ae->which == Z_AttributeValue_numeric)
+ return *(ae->value.numeric);
+ }
+ }
+ /* No truncation specified */
+ return 0;
+};
+
static int rpn2cql_simple(cql_transform_t ct,
void (*pr)(const char *buf, void *client_data),
void *client_data,
{
Z_AttributesPlusTerm *apt = q->u.attributesPlusTerm;
Z_Term *term = apt->term;
+ const char *sterm = 0;
+ size_t lterm = 0;
+ Odr_int trunc = lookup_truncation(apt->attributes);
+ size_t i;
wrbuf_rewind(w);
- ret = rpn2cql_attr(ct, pr, client_data, apt->attributes, w);
+ ret = rpn2cql_attr(ct, apt->attributes, w);
- switch(term->which)
+ switch (term->which)
{
case Z_Term_general:
- wrbuf_write(w, (const char *) term->u.general->buf, term->u.general->len);
+ lterm = term->u.general->len;
+ sterm = (const char *) term->u.general->buf;
break;
case Z_Term_numeric:
- wrbuf_printf(w, "%d", *term->u.numeric);
+ wrbuf_printf(w, ODR_INT_PRINTF, *term->u.numeric);
break;
case Z_Term_characterString:
- wrbuf_puts(w, term->u.characterString);
+ sterm = term->u.characterString;
+ lterm = strlen(sterm);
break;
default:
- ret = -1;
cql_transform_set_error(ct, YAZ_BIB1_TERM_TYPE_UNSUPP, 0);
+ return -1;
+ }
+
+ if (trunc <= 3 || trunc == 100 || trunc == 102 || trunc == 104)
+ {
+ int quote_it = 0;
+ for (i = 0 ; i < lterm; i++)
+ if (strchr(" ()=></", sterm[i]))
+ {
+ quote_it = 1;
+ break;
+ }
+ if (lterm == 0)
+ quote_it = 1;
+ if (quote_it)
+ wrbuf_puts(w, "\"");
+ if (trunc == 2 || trunc == 3)
+ wrbuf_puts(w, "*");
+ for (i = 0; i < lterm; i++)
+ {
+ if (sterm[i] == '\\' && i < lterm - 1)
+ {
+ i++;
+ if (strchr("*?\"\\", sterm[i]))
+ wrbuf_putc(w, '\\');
+ wrbuf_putc(w, sterm[i]);
+ }
+ else if (trunc == 102 && sterm[i] == '.' && sterm[i+1] == '*')
+ {
+ wrbuf_putc(w, '*');
+ i++;
+ }
+ else if (trunc == 102 && sterm[i] == '.')
+ wrbuf_putc(w, '?');
+ else if (trunc == 104 && sterm[i] == '?')
+ wrbuf_putc(w, '*');
+ else if (trunc == 104 && sterm[i] == '#')
+ wrbuf_putc(w, '?');
+ else if (strchr("*?\"", sterm[i]))
+ {
+ wrbuf_putc(w, '\\');
+ wrbuf_putc(w, sterm[i]);
+ }
+ else
+ wrbuf_putc(w, sterm[i]);
+ }
+ if (trunc == 1 || trunc == 3)
+ wrbuf_puts(w, "*");
+ if (quote_it)
+ wrbuf_puts(w, "\"");
+ }
+ else
+ {
+ cql_transform_set_error(
+ ct, YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE, 0);
+ ret = -1;
}
if (ret == 0)
pr(wrbuf_cstr(w), client_data);
return ret;
}
+
static int rpn2cql_structure(cql_transform_t ct,
void (*pr)(const char *buf, void *client_data),
void *client_data,
else
{
Z_Operator *op = q->u.complex->roperator;
+ Z_ProximityOperator *prox;
int r;
if (nested)
case Z_Operator_and_not:
pr(" not ", client_data);
break;
- case Z_Operator_prox:
- cql_transform_set_error(ct, YAZ_BIB1_UNSUPP_SEARCH, 0);
- return -1;
+ case Z_Operator_prox: {
+ pr(" prox", client_data);
+ prox = op->u.prox;
+ /* No way to express Odr_bool *exclusion -- ignore it */
+ if (prox->distance) {
+ char buf[21]; /* Enough for any 64-bit int */
+ char *op2name[6] = { "<", "<=", "=", ">=", ">","<>" };
+ pr("/distance", client_data);
+ if (!prox->relationType ||
+ *prox->relationType < Z_ProximityOperator_Prox_lessThan ||
+ *prox->relationType > Z_ProximityOperator_Prox_notEqual) {
+ cql_transform_set_error(ct, YAZ_BIB1_UNSUPP_SEARCH,
+ "unrecognised proximity relationType");
+ return -1;
+ }
+ pr(op2name[*prox->relationType-1], client_data);
+ sprintf(buf, "%ld", (long) *prox->distance);
+ pr(buf, client_data);
+ }
+ if (prox->ordered) {
+ if (*prox->ordered) {
+ pr("/ordered", client_data);
+ } else {
+ pr("/unordered", client_data);
+ }
+ }
+ if (prox->which != Z_ProximityOperator_known ||
+ *prox->u.known != Z_ProxUnit_word) {
+ pr("/unit=", client_data);
+ pr(yaz_prox_unit_name(prox), client_data);
+ }
+ pr(" ", client_data);
+ break;
+ }
}
r = rpn2cql_structure(ct, pr, client_data, q->u.complex->s2, 1, w);
if (nested)
/*
* Local variables:
* c-basic-offset: 4
+ * c-file-style: "Stroustrup"
* indent-tabs-mode: nil
* End:
* vim: shiftwidth=4 tabstop=8 expandtab
projects / yaz-moved-to-github.git / blobdiff