X-Git-Url: http://git.indexdata.com/?p=yaz-moved-to-github.git;a=blobdiff_plain;f=src%2Frpn2cql.c;h=b1063a1fa45b5accb6412db0bbafbaf48e9a13dc;hp=81ca55038e05686af5d4dfc264dffd569651bdc9;hb=173572735db6564239b28435231d34fada3fb446;hpb=35a1937624d302f2a53618958036a41a88b70388

diff --git a/src/rpn2cql.c b/src/rpn2cql.c
index 81ca550..b1063a1 100644
--- a/src/rpn2cql.c
+++ b/src/rpn2cql.c
@@ -1,13 +1,14 @@
 /* This file is part of the YAZ toolkit.
- * Copyright (C) 1995-2009 Index Data
+ * Copyright (C) 1995-2011 Index Data
  * See the file LICENSE for details.
  */
-
 /**
  * \file
  * \brief Implements RPN to CQL conversion
- *
  */
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
 
 #include <assert.h>
 #include <stdlib.h>
@@ -18,6 +19,11 @@
 #include <yaz/z-core.h>
 #include <yaz/wrbuf.h>
 
+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;
@@ -46,6 +52,58 @@ static const char *lookup_index_from_string_attr(Z_AttributeList *attributes)
     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,
                         Z_AttributeList *attributes, WRBUF w)
 {
@@ -53,11 +111,14 @@ static int rpn2cql_attr(cql_transform_t ct,
     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 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,
@@ -78,6 +139,7 @@ static int rpn2cql_attr(cql_transform_t ct,
                 relation = "<=";
             else if (!strcmp(relation, "ge"))
                 relation = ">=";
+            /* Missing mapping of not equal, phonetic, stem and relevance */
             wrbuf_puts(w, relation);
         }
         else
@@ -96,6 +158,37 @@ static int rpn2cql_attr(cql_transform_t ct,
     return 0;
 }
 
+/* Bug 2878: Currently only support left and right truncation. Specific check for this */
+static int checkForTruncation(int flag, 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)
+            {
+                Odr_int truncation = *(ae->value.numeric);
+                /* This logic only works for Left, right and both. eg. 1,2,3 */
+            	if (truncation <= 3)
+                    return ((int) truncation & flag);
+            }
+            /* Complex: Shouldn't happen */
+        }
+    }
+    /* No truncation or unsupported */
+    return 0;
+};
+
+static int checkForLeftTruncation(Z_AttributeList *attributes) {
+	return checkForTruncation(2, attributes);
+}
+
+static int checkForRightTruncation(Z_AttributeList *attributes) {
+	return checkForTruncation(1, attributes);
+};
+
 static int rpn2cql_simple(cql_transform_t ct,
                           void (*pr)(const char *buf, void *client_data),
                           void *client_data,
@@ -144,7 +237,13 @@ static int rpn2cql_simple(cql_transform_t ct,
                     must_quote = 1;
             if (must_quote)
                 wrbuf_puts(w, "\"");
+            /* Bug 2878: Check and add Truncation */
+			if (checkForLeftTruncation(apt->attributes))
+                wrbuf_puts(w, "*");
             wrbuf_write(w, sterm, lterm);
+            /* Bug 2878: Check and add Truncation */
+			if (checkForRightTruncation(apt->attributes))
+                wrbuf_puts(w, "*");
             if (must_quote)
                 wrbuf_puts(w, "\"");
         }
@@ -154,6 +253,7 @@ static int rpn2cql_simple(cql_transform_t ct,
     return ret;
 }
 
+
 static int rpn2cql_structure(cql_transform_t ct,
                              void (*pr)(const char *buf, void *client_data),
                              void *client_data,