Change wildcard and constant_keyword fields to return keyword for field capabilities.

Relates to #53175

Author: markharwood

server/src/main/java/org/elasticsearch/action/fieldcaps/TransportFieldCapabilitiesIndexAction.java

@@ -124,7 +124,7 @@ private FieldCapabilitiesIndexResponse shardOperation(final FieldCapabilitiesInd
             if (ft != null) {
                 if (indicesService.isMetadataField(mapperService.getIndexSettings().getIndexVersionCreated(), field)
                     || fieldPredicate.test(ft.name())) {
-                    IndexFieldCapabilities fieldCap = new IndexFieldCapabilities(field, ft.typeName(),
+                    IndexFieldCapabilities fieldCap = new IndexFieldCapabilities(field, ft.familyTypeName(),
                         ft.isSearchable(), ft.isAggregatable(), ft.meta());
                     responseMap.put(field, fieldCap);
                 } else {

server/src/main/java/org/elasticsearch/index/mapper/MappedFieldType.java

@@ -135,6 +135,11 @@ public int hashCode() {
 
     /** Returns the name of this type, as would be specified in mapping properties */
     public abstract String typeName();
+    
+    /** Returns the field family type, as used in field capabilities */
+    public String familyTypeName() {
+        return typeName();
+    }
 
     public String name() {
         return name;

x-pack/plugin/mapper-constant-keyword/src/main/java/org/elasticsearch/xpack/constantkeyword/mapper/ConstantKeywordFieldMapper.java

@@ -30,6 +30,7 @@
 import org.elasticsearch.index.fielddata.plain.ConstantIndexFieldData;
 import org.elasticsearch.index.mapper.ConstantFieldType;
 import org.elasticsearch.index.mapper.FieldMapper;
+import org.elasticsearch.index.mapper.KeywordFieldMapper;
 import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.Mapper;
 import org.elasticsearch.index.mapper.MapperParsingException;
@@ -151,6 +152,11 @@ public String value() {
         public String typeName() {
             return CONTENT_TYPE;
         }
+        
+        @Override
+        public String familyTypeName() {
+            return KeywordFieldMapper.CONTENT_TYPE;
+        }        
 
         @Override
         public IndexFieldData.Builder fielddataBuilder(String fullyQualifiedIndexName) {

x-pack/plugin/wildcard/src/main/java/org/elasticsearch/xpack/wildcard/mapper/WildcardFieldMapper.java

@@ -55,6 +55,7 @@
 import org.elasticsearch.index.fielddata.plain.StringBinaryIndexFieldData;
 import org.elasticsearch.index.mapper.BinaryFieldMapper.CustomBinaryDocValuesField;
 import org.elasticsearch.index.mapper.FieldMapper;
+import org.elasticsearch.index.mapper.KeywordFieldMapper;
 import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.Mapper;
 import org.elasticsearch.index.mapper.MapperParsingException;
@@ -848,6 +849,12 @@ public Query fuzzyQuery(
         public String typeName() {
             return CONTENT_TYPE;
         }
+        
+        @Override
+        public String familyTypeName() {
+            return KeywordFieldMapper.CONTENT_TYPE;
+        }
+        
 
         @Override
         public Query existsQuery(QueryShardContext context) {