Allow plugins outside core package to access and override some function of FieldMapper

Signed-off-by: Bo Zhang <[email protected]>

Author: bzhangam

plugins/analysis-icu/src/main/java/org/opensearch/index/mapper/ICUCollationKeywordFieldMapper.java

@@ -144,7 +144,7 @@ public IndexFieldData.Builder fielddataBuilder(String fullyQualifiedIndexName, S
         }
 
         @Override
-        protected BytesRef indexedValueForSearch(Object value) {
+        public BytesRef indexedValueForSearch(Object value) {
             if (value == null) {
                 return null;
             }

server/src/main/java/org/opensearch/index/mapper/FlatObjectFieldMapper.java

@@ -294,7 +294,7 @@ public Object valueForDisplay(Object value) {
         }
 
         @Override
-        protected BytesRef indexedValueForSearch(Object value) {
+        public BytesRef indexedValueForSearch(Object value) {
             if (getTextSearchInfo().getSearchAnalyzer() == Lucene.KEYWORD_ANALYZER) {
                 // flat_object analyzer with the default attribute source which encodes terms using UTF8
                 // in that case we skip normalization, which may be slow if there many terms need to

server/src/main/java/org/opensearch/index/mapper/KeywordFieldMapper.java

@@ -378,7 +378,7 @@ public Object valueForDisplay(Object value) {
         }
 
         @Override
-        protected BytesRef indexedValueForSearch(Object value) {
+        public BytesRef indexedValueForSearch(Object value) {
             if (getTextSearchInfo().getSearchAnalyzer() == Lucene.KEYWORD_ANALYZER) {
                 // keyword analyzer with the default attribute source which encodes terms using UTF8
                 // in that case we skip normalization, which may be slow if there many terms need to

server/src/main/java/org/opensearch/index/mapper/NumberFieldMapper.java

@@ -1557,6 +1557,14 @@ public NumberType numberType() {
             return type;
         }
 
+        public Number nullValue() {
+            return nullValue;
+        }
+
+        public boolean coerce() {
+            return coerce;
+        }
+
         public NumericType numericType() {
             return type.numericType();
         }

server/src/main/java/org/opensearch/index/mapper/ParametrizedFieldMapper.java

@@ -95,7 +95,7 @@ protected ParametrizedFieldMapper(String simpleName, MappedFieldType mappedField
     public abstract ParametrizedFieldMapper.Builder getMergeBuilder();
 
     @Override
-    public final ParametrizedFieldMapper merge(Mapper mergeWith) {
+    public ParametrizedFieldMapper merge(Mapper mergeWith) {
 
         if (mergeWith instanceof FieldMapper == false) {
             throw new IllegalArgumentException(
@@ -348,7 +348,7 @@ private void merge(FieldMapper toMerge, Conflicts conflicts) {
             }
         }
 
-        protected void toXContent(XContentBuilder builder, boolean includeDefaults) throws IOException {
+        public void toXContent(XContentBuilder builder, boolean includeDefaults) throws IOException {
             if (serializerCheck.check(includeDefaults, isConfigured(), get())) {
                 serializer.serialize(builder, name, getValue());
             }
@@ -649,7 +649,7 @@ protected String buildFullName(BuilderContext context) {
         /**
          * Writes the current builder parameter values as XContent
          */
-        protected final void toXContent(XContentBuilder builder, boolean includeDefaults) throws IOException {
+        public final void toXContent(XContentBuilder builder, boolean includeDefaults) throws IOException {
             for (Parameter<?> parameter : getParameters()) {
                 parameter.toXContent(builder, includeDefaults);
             }

server/src/main/java/org/opensearch/index/mapper/TermBasedFieldType.java

@@ -69,7 +69,7 @@ public TermBasedFieldType(
     /** Returns the indexed value used to construct search "values".
      *  This method is used for the default implementations of most
      *  query factory methods such as {@link #termQuery}. */
-    protected BytesRef indexedValueForSearch(Object value) {
+    public BytesRef indexedValueForSearch(Object value) {
         return BytesRefs.toBytesRef(value);
     }