retrieval: pick matched element-set rule YAZ-813
[yaz-moved-to-github.git] / src / retrieval.c
index eecea4c..b65a3f3 100644 (file)
@@ -1,8 +1,6 @@
-/*
- * Copyright (C) 2005-2006, Index Data ApS
+/* This file is part of the YAZ toolkit.
+ * Copyright (C) Index Data
  * See the file LICENSE for details.
- *
- * $Id: retrieval.c,v 1.13 2006-12-12 10:41:38 marc Exp $
  */
 /**
  * \file retrieval.c
@@ -19,7 +17,9 @@
 #include <yaz/xmalloc.h>
 #include <yaz/nmem.h>
 #include <yaz/tpath.h>
+#include <yaz/match_glob.h>
 #include <yaz/proto.h>
+#include <yaz/oid_db.h>
 
 #if YAZ_HAVE_XML2
 #include <libxml/parser.h>
@@ -54,12 +54,12 @@ struct yaz_retrieval_elem {
     /** \brief schema name , short-hand such as "dc" */
     const char *name;
     /** \brief record syntax */
-    int *syntax;
+    Odr_oid *syntax;
 
     /** \brief backend name */
     const char *backend_name;
     /** \brief backend syntax */
-    int *backend_syntax;
+    Odr_oid *backend_syntax;
 
     /** \brief record conversion */
     yaz_record_conv_t record_conv;
@@ -72,9 +72,9 @@ static void yaz_retrieval_reset(yaz_retrieval_t p);
 
 yaz_retrieval_t yaz_retrieval_create()
 {
-    yaz_retrieval_t p = xmalloc(sizeof(*p));
+    yaz_retrieval_t p = (yaz_retrieval_t) xmalloc(sizeof(*p));
     p->odr = odr_createmem(ODR_ENCODE);
-    p->nmem = p->odr->mem;
+    p->nmem = odr_getmem(p->odr);
     p->wr_error = wrbuf_alloc();
     p->list = 0;
     p->path = 0;
@@ -88,7 +88,7 @@ void yaz_retrieval_destroy(yaz_retrieval_t p)
     {
         yaz_retrieval_reset(p);
         odr_destroy(p->odr);
-        wrbuf_free(p->wr_error, 1);
+        wrbuf_destroy(p->wr_error);
         xfree(p->path);
         xfree(p);
     }
@@ -108,11 +108,12 @@ void yaz_retrieval_reset(yaz_retrieval_t p)
 }
 
 /** \brief parse retrieval XML config */
-static int conf_retrieval(yaz_retrieval_t p, const xmlNode *ptr)
+static int conf_retrieval(yaz_retrieval_t p, const xmlNode *ptr,
+                          struct yaz_record_conv_type *types)
 {
-
     struct _xmlAttr *attr;
-    struct yaz_retrieval_elem *el = nmem_malloc(p->nmem, sizeof(*el));
+    struct yaz_retrieval_elem *el = (struct yaz_retrieval_elem *)
+        nmem_malloc(p->nmem, sizeof(*el));
 
     el->syntax = 0;
     el->identifier = 0;
@@ -127,9 +128,11 @@ static int conf_retrieval(yaz_retrieval_t p, const xmlNode *ptr)
         if (!xmlStrcmp(attr->name, BAD_CAST "syntax") &&
             attr->children && attr->children->type == XML_TEXT_NODE)
         {
-            el->syntax = yaz_str_to_z3950oid(
-                p->odr, CLASS_RECSYN,
-                (const char *) attr->children->content);
+            el->syntax = yaz_string_to_oid_odr(
+                yaz_oid_std(),
+                CLASS_RECSYN,
+                (const char *) attr->children->content,
+                p->odr);
             if (!el->syntax)
             {
                 wrbuf_printf(p->wr_error, "Element <retrieval>: "
@@ -144,7 +147,7 @@ static int conf_retrieval(yaz_retrieval_t p, const xmlNode *ptr)
                 nmem_strdup(p->nmem, (const char *) attr->children->content);
         else if (!xmlStrcmp(attr->name, BAD_CAST "name") &&
                  attr->children && attr->children->type == XML_TEXT_NODE)
-            el->name = 
+            el->name =
                 nmem_strdup(p->nmem, (const char *) attr->children->content);
         else
         {
@@ -166,60 +169,71 @@ static int conf_retrieval(yaz_retrieval_t p, const xmlNode *ptr)
     el->record_conv = 0; /* OK to have no 'backend' sub content */
     for (ptr = ptr->children; ptr; ptr = ptr->next)
     {
-        if (ptr->type == XML_ELEMENT_NODE
-            && 0 != strcmp((const char *) ptr->name, "backend")){
+        if (ptr->type != XML_ELEMENT_NODE)
+            continue;
+        if (strcmp((const char *) ptr->name, "backend"))
+        {
             wrbuf_printf(p->wr_error, "Element <retrieval>: expected"
                          " zero or one element <backend>, got <%s>",
                          (const char *) ptr->name);
             return -1;
         }
-
-        else {
-
-            /* parsing attributees */
+        else
+        {
             struct _xmlAttr *attr;
-            for (attr = ptr->properties; attr; attr = attr->next){
-            
-                if (!xmlStrcmp(attr->name, BAD_CAST "name") 
-                         && attr->children 
+            if (el->record_conv)
+            {
+                wrbuf_printf(p->wr_error, "Element <retrieval>: "
+                             "only one <backend> allowed");
+                yaz_record_conv_destroy(el->record_conv);
+                return -1;
+            }
+            /* parsing attributees */
+            for (attr = ptr->properties; attr; attr = attr->next)
+            {
+                if (!xmlStrcmp(attr->name, BAD_CAST "name")
+                         && attr->children
                          && attr->children->type == XML_TEXT_NODE)
-                    el->backend_name 
-                        = nmem_strdup(p->nmem, 
+                    el->backend_name
+                        = nmem_strdup(p->nmem,
                                       (const char *) attr->children->content);
 
-                else if (!xmlStrcmp(attr->name, BAD_CAST "syntax") 
-                         && attr->children 
-                         && attr->children->type == XML_TEXT_NODE){
-                    el->backend_syntax 
-                    = yaz_str_to_z3950oid(p->odr, CLASS_RECSYN,
-                       (const char *) attr->children->content);
-                    
-                    if (!el->backend_syntax){
-                        wrbuf_printf(p->wr_error, 
+                else if (!xmlStrcmp(attr->name, BAD_CAST "syntax")
+                         && attr->children
+                         && attr->children->type == XML_TEXT_NODE)
+                {
+                    el->backend_syntax
+                        = yaz_string_to_oid_odr(
+                            yaz_oid_std(),
+                            CLASS_RECSYN,
+                            (const char *) attr->children->content,
+                            p->odr);
+                    if (!el->backend_syntax)
+                    {
+                        wrbuf_printf(p->wr_error,
                                      "Element <backend syntax='%s'>: "
                                      "attribute 'syntax' has invalid "
-                                     "value '%s'", 
+                                     "value '%s'",
                                      attr->children->content,
                                      attr->children->content);
                         return -1;
-                    } 
+                    }
                 }
-                else {
+                else
+                {
                     wrbuf_printf(p->wr_error, "Element <backend>: expected "
-                                 "attributes 'syntax' or 'name, got '%s'", 
+                                 "attributes 'syntax' or 'name, got '%s'",
                                  attr->name);
                     return -1;
                 }
             }
-          
-            /* parsing internal of record conv */
+
+             /* parsing internal of record conv */
             el->record_conv = yaz_record_conv_create();
-            
+
             yaz_record_conv_set_path(el->record_conv, p->path);
 
-        
-            if (yaz_record_conv_configure(el->record_conv, ptr))
+            if (yaz_record_conv_configure_t(el->record_conv, ptr, types))
             {
                 wrbuf_printf(p->wr_error, "%s",
                              yaz_record_conv_get_error(el->record_conv));
@@ -228,16 +242,15 @@ static int conf_retrieval(yaz_retrieval_t p, const xmlNode *ptr)
             }
         }
     }
-    
+
     *p->list_p = el;
     p->list_p = &el->next;
     return 0;
 }
 
-int yaz_retrieval_configure(yaz_retrieval_t p, const void *ptr_v)
+int yaz_retrieval_configure_t(yaz_retrieval_t p, const xmlNode *ptr,
+                              struct yaz_record_conv_type *types)
 {
-    const xmlNode *ptr = ptr_v; 
-
     yaz_retrieval_reset(p);
 
     if (ptr && ptr->type == XML_ELEMENT_NODE &&
@@ -249,13 +262,13 @@ int yaz_retrieval_configure(yaz_retrieval_t p, const void *ptr_v)
                 continue;
             if (!strcmp((const char *) ptr->name, "retrieval"))
             {
-                if (conf_retrieval(p, ptr))
+                if (conf_retrieval(p, ptr, types))
                     return -1;
             }
             else
             {
                 wrbuf_printf(p->wr_error, "Element <retrievalinfo>: "
-                             "expected element <retrieval>, got <%s>", 
+                             "expected element <retrieval>, got <%s>",
                              ptr->name);
                 return -1;
             }
@@ -269,16 +282,22 @@ int yaz_retrieval_configure(yaz_retrieval_t p, const void *ptr_v)
     return 0;
 }
 
+int yaz_retrieval_configure(yaz_retrieval_t p, const xmlNode *ptr)
+{
+    return yaz_retrieval_configure_t(p, ptr, 0);
+}
+
 int yaz_retrieval_request(yaz_retrieval_t p,
-                          const char *schema, int *syntax,
-                          const char **match_schema, int **match_syntax,
+                          const char *schema, Odr_oid *syntax,
+                          const char **match_schema, Odr_oid **match_syntax,
                           yaz_record_conv_t *rc,
                           const char **backend_schema,
-                          int **backend_syntax)
+                          Odr_oid **backend_syntax)
 {
     struct yaz_retrieval_elem *el = p->list;
     int syntax_matches = 0;
     int schema_matches = 0;
+    struct yaz_retrieval_elem *el_best = 0;
 
     wrbuf_rewind(p->wr_error);
     if (!el)
@@ -292,14 +311,14 @@ int yaz_retrieval_request(yaz_retrieval_t p,
             schema_ok = 1;
         else
         {
-            if (el->name && !strcmp(schema, el->name))
-                schema_ok = 1;
+            if (el->name && yaz_match_glob(el->name, schema))
+                schema_ok = 2;
             if (el->identifier && !strcmp(schema, el->identifier))
-                schema_ok = 1;
+                schema_ok = 2;
             if (!el->name && !el->identifier)
                 schema_ok = 1;
         }
-        
+
         if (syntax && el->syntax && !oid_oidcmp(syntax, el->syntax))
             syntax_ok = 1;
         if (!syntax)
@@ -311,36 +330,45 @@ int yaz_retrieval_request(yaz_retrieval_t p,
             schema_matches++;
         if (syntax_ok && schema_ok)
         {
-            *match_syntax = el->syntax;
-            if (el->identifier)
-                *match_schema = el->identifier;
-            else
-                *match_schema = 0;
-            if (backend_schema)
+            if (!el_best || schema_ok == 2)
+                el_best = el;
+        }
+    }
+    if (el_best)
+    {
+        el = el_best;
+        *match_syntax = el->syntax;
+        if (el->identifier)
+            *match_schema = el->identifier;
+        else
+            *match_schema = 0;
+        if (backend_schema)
+        {
+            if (el->backend_name)
             {
-                if (el->backend_name)
+                if (*el->backend_name)
                     *backend_schema = el->backend_name;
-                else if (el->name)
-                    *backend_schema = el->name;                    
-                else
-                    *backend_schema = schema;
-            }
-            if (backend_syntax)
-            {
-                if (el->backend_syntax)
-                    *backend_syntax = el->backend_syntax;
-                else
-                    *backend_syntax = el->syntax;
             }
-            if (rc)
-                *rc = el->record_conv;
-            return 0;
+            else if (el->name)
+                *backend_schema = el->name;
+            else
+                *backend_schema = schema;
         }
+        if (backend_syntax)
+        {
+            if (el->backend_syntax)
+                *backend_syntax = el->backend_syntax;
+            else
+                *backend_syntax = el->syntax;
+        }
+        if (rc)
+            *rc = el->record_conv;
+        return 0;
     }
     if (!syntax_matches && syntax)
     {
         char buf[OID_STR_MAX];
-        wrbuf_printf(p->wr_error, "%s", oid_to_dotstring(syntax, buf));
+        wrbuf_printf(p->wr_error, "%s", oid_oid_to_dotstring(syntax, buf));
         return 2;
     }
     if (schema)
@@ -352,7 +380,7 @@ int yaz_retrieval_request(yaz_retrieval_t p,
 
 const char *yaz_retrieval_get_error(yaz_retrieval_t p)
 {
-    return wrbuf_buf(p->wr_error);
+    return wrbuf_cstr(p->wr_error);
 }
 
 void yaz_retrieval_set_path(yaz_retrieval_t p, const char *path)
@@ -368,6 +396,7 @@ void yaz_retrieval_set_path(yaz_retrieval_t p, const char *path)
 /*
  * Local variables:
  * c-basic-offset: 4
+ * c-file-style: "Stroustrup"
  * indent-tabs-mode: nil
  * End:
  * vim: shiftwidth=4 tabstop=8 expandtab