From d29507fe5f3aa696e483a4de416e8195bb4af47c Mon Sep 17 00:00:00 2001
From: Tatu Saloranta <tatu.saloranta@iki.fi>
Date: Sun, 3 Mar 2024 22:36:26 -0800
Subject: [PATCH] Improve #1149 wrt JsonParser.getNumberTypeFP() default
 implementation (#1235)

---
 .../com/fasterxml/jackson/core/JsonParser.java  | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/fasterxml/jackson/core/JsonParser.java b/src/main/java/com/fasterxml/jackson/core/JsonParser.java
index 3aebea959d..03f0189fc1 100644
--- a/src/main/java/com/fasterxml/jackson/core/JsonParser.java
+++ b/src/main/java/com/fasterxml/jackson/core/JsonParser.java
@@ -1769,8 +1769,13 @@ public Object getNumberValueDeferred() throws IOException {
      * {@link JsonToken#VALUE_NUMBER_FLOAT}, returns
      * one of {@link NumberTypeFP} constants; otherwise returns
      * {@link NumberTypeFP#UNKNOWN}.
+     *<p>
+     * Default implementation as of Jackson 2.x will call {@link #getNumberType()}
+     * and translate types -- this needs to be overriden actual implementations
+     * if this is not sufficient (which it usually is not for textual formats).
      *
-     * @return Type of current number, if parser points to numeric token; {@code null} otherwise
+     * @return Type of current floating-point number, if parser points to numeric token;
+     *   {@link NumberTypeFP#UNKNOWN} otherwise.
      *
      * @throws IOException for low-level read issues, or
      *   {@link JsonParseException} for decoding problems
@@ -1778,6 +1783,16 @@ public Object getNumberValueDeferred() throws IOException {
      * @since 2.17
      */
     public NumberTypeFP getNumberTypeFP() throws IOException {
+        NumberType nt = getNumberType();
+        if (nt == NumberType.BIG_DECIMAL) {
+            return NumberTypeFP.BIG_DECIMAL;
+        }
+        if (nt == NumberType.DOUBLE) {
+            return NumberTypeFP.DOUBLE64;
+        }
+        if (nt == NumberType.FLOAT) {
+            return NumberTypeFP.FLOAT32;
+        }
         return NumberTypeFP.UNKNOWN;
     }