added solr field images_withalt_i

defaults/solr.keys.list

@@ -228,6 +228,9 @@ h6_txt
 ## all image link alt tag
 #images_alt_txt
 
+## number of image links with alt tag
+#images_withalt_i
+
 ## binary pattern for the existance of h1..h6 headlines, int
 #htags_i
 

source/net/yacy/search/index/SolrConfiguration.java

@@ -510,6 +510,7 @@ public class SolrConfiguration extends ConfigurationSet implements Serializable
             final List<String> imgprots = new ArrayList<String>(imagesc.size());
             final List<String> imgstubs = new ArrayList<String>(imagesc.size());
             final List<String> imgalts  = new ArrayList<String>(imagesc.size());
+            int withalt = 0;
             for (final ImageEntry ie: imagesc) {
                 final MultiProtocolURI uri = ie.url();
                 inboundLinks.remove(uri);
@@ -519,12 +520,14 @@ public class SolrConfiguration extends ConfigurationSet implements Serializable
                 imgprots.add(protocol);
                 imgstubs.add(uri.toString().substring(protocol.length() + 3));
                 imgalts.add(ie.alt());
+                if (ie.alt() != null && ie.alt().length() > 0) withalt++;
             }
             if (allAttr || contains(YaCySchema.imagescount_i)) add(doc, YaCySchema.imagescount_i, imgtags.size());
             if (allAttr || contains(YaCySchema.images_tag_txt)) add(doc, YaCySchema.images_tag_txt, imgtags);
             if (allAttr || contains(YaCySchema.images_protocol_sxt)) add(doc, YaCySchema.images_protocol_sxt, protocolList2indexedList(imgprots));
             if (allAttr || contains(YaCySchema.images_urlstub_txt)) add(doc, YaCySchema.images_urlstub_txt, imgstubs);
             if (allAttr || contains(YaCySchema.images_alt_txt)) add(doc, YaCySchema.images_alt_txt, imgalts);
+            if (allAttr || contains(YaCySchema.images_withalt_i)) add(doc, YaCySchema.images_alt_txt, withalt);
 
             // style sheets
             if (allAttr || contains(YaCySchema.css_tag_txt)) {

source/net/yacy/search/index/YaCySchema.java

@@ -117,6 +117,7 @@ public enum YaCySchema implements Schema {
     images_urlstub_txt(SolrType.text_general, true, true, true, "all image links without the protocol and '://'"),
     images_protocol_sxt(SolrType.text_general, true, true, true, "all image link protocols"),
     images_alt_txt(SolrType.text_general, true, true, true, "all image link alt tag"),
+    images_withalt_i(SolrType.integer, true, true, false, "number of image links with alt tag"),
     htags_i(SolrType.integer, true, true, false, "binary pattern for the existance of h1..h6 headlines"),
     canonical_t(SolrType.text_general, true, true, false, "url inside the canonical link element"),
     refresh_s(SolrType.string, true, true, false, "link from the url property inside the refresh link element"),