-/* $Id: xslt.c,v 1.5 2005-05-01 07:38:51 adam Exp $
+/* $Id: xslt.c,v 1.6 2005-05-31 17:36:16 adam Exp $
Copyright (C) 1995-2005
Index Data ApS
#include <libxml/xmlversion.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
-#ifdef LIBXML_READER_ENABLED
#include <libxml/xmlreader.h>
-#endif
#include <libxslt/transform.h>
#include <idzebra/util.h>
#include <idzebra/recctrl.h>
-struct filter_info {
+struct filter_schema {
+ const char *name;
+ const char *identifier;
+ const char *stylesheet;
+ struct filter_schema *next;
+ const char *default_schema;
xsltStylesheetPtr stylesheet_xsp;
-#ifdef LIBXML_READER_ENABLED
- xmlTextReaderPtr reader;
-#endif
+};
+
+struct filter_info {
+ xmlDocPtr doc;
char *fname;
int split_depth;
ODR odr;
+ struct filter_schema *schemas;
+ xmlTextReaderPtr reader;
};
#define ZEBRA_INDEX_NS "http://indexdata.dk/zebra/indexing/1"
static void *filter_init_xslt(Res res, RecType recType)
{
struct filter_info *tinfo = (struct filter_info *) xmalloc(sizeof(*tinfo));
- tinfo->stylesheet_xsp = 0;
-#ifdef LIBXML_READER_ENABLED
tinfo->reader = 0;
-#endif
tinfo->fname = 0;
tinfo->split_depth = 0;
tinfo->odr = odr_createmem(ODR_ENCODE);
+ tinfo->doc = 0;
+ tinfo->schemas = 0;
return tinfo;
}
return tinfo;
}
+static int attr_content(struct _xmlAttr *attr, const char *name,
+ const char **dst_content)
+{
+ if (!strcmp(attr->name, name) && attr->children &&
+ attr->children->type == XML_TEXT_NODE)
+ {
+ *dst_content = attr->children->content;
+ return 1;
+ }
+ return 0;
+}
+
+static void destroy_schemas(struct filter_info *tinfo)
+{
+ struct filter_schema *schema = tinfo->schemas;
+ while (schema)
+ {
+ struct filter_schema *schema_next = schema->next;
+ if (schema->stylesheet_xsp)
+ xsltFreeStylesheet(schema->stylesheet_xsp);
+ xfree(schema);
+ schema = schema_next;
+ }
+ tinfo->schemas = 0;
+ xfree(tinfo->fname);
+ if (tinfo->doc)
+ xmlFreeDoc(tinfo->doc);
+ tinfo->doc = 0;
+}
+
+static ZEBRA_RES create_schemas(struct filter_info *tinfo, const char *fname)
+{
+ xmlNodePtr ptr;
+ tinfo->fname = xstrdup(fname);
+ tinfo->doc = xmlParseFile(tinfo->fname);
+ if (!tinfo->doc)
+ return ZEBRA_FAIL;
+ ptr = xmlDocGetRootElement(tinfo->doc);
+ if (!ptr || ptr->type != XML_ELEMENT_NODE ||
+ strcmp(ptr->name, "schemaInfo"))
+ return ZEBRA_FAIL;
+ for (ptr = ptr->children; ptr; ptr = ptr->next)
+ {
+ if (ptr->type == XML_ELEMENT_NODE &&
+ !strcmp(ptr->name, "schema"))
+ {
+ struct _xmlAttr *attr;
+ struct filter_schema *schema = xmalloc(sizeof(*schema));
+ schema->name = 0;
+ schema->identifier = 0;
+ schema->stylesheet = 0;
+ schema->default_schema = 0;
+ schema->next = tinfo->schemas;
+ schema->stylesheet_xsp = 0;
+ tinfo->schemas = schema;
+ for (attr = ptr->properties; attr; attr = attr->next)
+ {
+ attr_content(attr, "identifier", &schema->identifier);
+ attr_content(attr, "name", &schema->name);
+ attr_content(attr, "stylesheet", &schema->stylesheet);
+ attr_content(attr, "default", &schema->default_schema);
+ }
+ if (schema->stylesheet)
+ schema->stylesheet_xsp =
+ xsltParseStylesheetFile(
+ (const xmlChar*) schema->stylesheet);
+ }
+ }
+ return ZEBRA_OK;
+}
+
+static struct filter_schema *lookup_schema(struct filter_info *tinfo,
+ const char *est)
+{
+ struct filter_schema *schema;
+ for (schema = tinfo->schemas; schema; schema = schema->next)
+ {
+ if (est)
+ {
+ if (schema->identifier && !strcmp(schema->identifier, est))
+ return schema;
+ if (schema->name && !strcmp(schema->name, est))
+ return schema;
+ }
+ if (schema->default_schema)
+ return schema;
+ }
+ return 0;
+}
+
static void filter_config(void *clientData, Res res, const char *args)
{
struct filter_info *tinfo = clientData;
if (!args || !*args)
- args = "default.xsl";
- if (!tinfo->fname || strcmp(args, tinfo->fname))
- {
- /* different filename so must reread stylesheet */
- xfree(tinfo->fname);
- tinfo->fname = xstrdup(args);
- if (tinfo->stylesheet_xsp)
- xsltFreeStylesheet(tinfo->stylesheet_xsp);
- tinfo->stylesheet_xsp =
- xsltParseStylesheetFile((const xmlChar*) tinfo->fname);
- }
+ args = "xsltfilter.xml";
+ if (tinfo->fname && !strcmp(args, tinfo->fname))
+ return;
+ destroy_schemas(tinfo);
+ create_schemas(tinfo, args);
}
static void filter_destroy(void *clientData)
{
struct filter_info *tinfo = clientData;
- if (tinfo->stylesheet_xsp)
- xsltFreeStylesheet(tinfo->stylesheet_xsp);
-#ifdef LIBXML_READER_ENABLED
+ destroy_schemas(tinfo);
if (tinfo->reader)
xmlFreeTextReader(tinfo->reader);
-#endif
- xfree(tinfo->fname);
odr_destroy(tinfo->odr);
xfree(tinfo);
}
xmlChar *buf_out;
int len_out;
+ struct filter_schema *schema = lookup_schema(tinfo, ZEBRA_INDEX_NS);
+
params[0] = 0;
set_param_str(params, "schema", ZEBRA_INDEX_NS, tinfo->odr);
(*p->init)(p, &recWord);
recWord.reg_type = 'w';
- if (tinfo->stylesheet_xsp)
+ if (schema && schema->stylesheet_xsp)
{
xmlDocPtr resDoc =
- xsltApplyStylesheet(tinfo->stylesheet_xsp,
+ xsltApplyStylesheet(schema->stylesheet_xsp,
doc, params);
if (p->flagShowRecords)
{
return RECCTRL_EXTRACT_OK;
}
-#ifdef LIBXML_READER_ENABLED
static int extract_split(struct filter_info *tinfo, struct recExtractCtrl *p)
{
int ret;
if (!tinfo->reader)
return RECCTRL_EXTRACT_ERROR_GENERIC;
- if (!tinfo->stylesheet_xsp)
- return RECCTRL_EXTRACT_ERROR_GENERIC;
-
ret = xmlTextReaderRead(tinfo->reader);
while (ret == 1) {
int type = xmlTextReaderNodeType(tinfo->reader);
tinfo->reader = 0;
return RECCTRL_EXTRACT_EOF;
}
-#endif
static int extract_full(struct filter_info *tinfo, struct recExtractCtrl *p)
{
return extract_full(tinfo, p);
else
{
-#ifdef LIBXML_READER_ENABLED
return extract_split(tinfo, p);
-#else
- /* no xmlreader so we can't split it */
- return RECCTRL_EXTRACT_ERROR_GENERIC;
-#endif
}
}
return 0;
}
+
static int filter_retrieve (void *clientData, struct recRetrieveCtrl *p)
{
const char *esn = ZEBRA_SCHEMA_IDENTITY_NS;
struct filter_info *tinfo = clientData;
xmlDocPtr resDoc;
xmlDocPtr doc;
+ struct filter_schema *schema;
if (p->comp)
{
}
esn = p->comp->u.simple->u.generic;
}
-
+ schema = lookup_schema(tinfo, esn);
+ if (!schema)
+ {
+ p->diagnostic =
+ YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
+ return 0;
+ }
+
params[0] = 0;
set_param_str(params, "schema", esn, p->odr);
if (p->fname)
set_param_int(params, "score", p->score, p->odr);
set_param_int(params, "size", p->recordSize, p->odr);
- if (!tinfo->stylesheet_xsp)
- {
- p->diagnostic = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
- return 0;
- }
doc = xmlReadIO(ioread_ret, ioclose_ret, p /* I/O handler */,
0 /* URL */,
0 /* encoding */,
return 0;
}
- if (!strcmp(esn, ZEBRA_SCHEMA_IDENTITY_NS))
+ if (!schema->stylesheet_xsp)
resDoc = doc;
else
{
- resDoc = xsltApplyStylesheet(tinfo->stylesheet_xsp,
+ resDoc = xsltApplyStylesheet(schema->stylesheet_xsp,
doc, params);
xmlFreeDoc(doc);
}