fix: honor IgnoreSetNullValue in specialized FieldReader subclasses, for issue #7618

core/src/main/java/com/alibaba/fastjson2/reader/FieldReader.java

@@ -746,4 +746,16 @@ private boolean needCompareToActualFieldClass(Class clazz) {
     public final boolean isParameter() {
         return paramNameHash != 0;
     }
+
+    protected final boolean ignoreSetNullValue() {
+        return (features & JSONReader.Feature.IgnoreSetNullValue.mask) != 0;
+    }
+
+    protected final boolean ignoreSetNullValue(JSONReader jsonReader) {
+        long allFeatures = features;
+        if (jsonReader != null) {
+            allFeatures |= jsonReader.getContext().getFeatures();
+        }
+        return (allFeatures & JSONReader.Feature.IgnoreSetNullValue.mask) != 0;
+    }
 }

core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderBigDecimal.java

@@ -29,6 +29,9 @@ public FieldReaderBigDecimal(
 
     @Override
     public void accept(T object, Object value) {
+        if (value == null && ignoreSetNullValue()) {
+            return;
+        }
         propertyAccessor.setObject(object, value);
     }
 
@@ -45,6 +48,10 @@ public void readFieldValue(JSONReader jsonReader, T object) {
             }
         }
 
+        if (fieldValue == null && ignoreSetNullValue(jsonReader)) {
+            return;
+        }
+
         propertyAccessor.setObject(object, fieldValue);
     }
 

core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderBigInteger.java

@@ -41,11 +41,17 @@ public void readFieldValue(JSONReader jsonReader, T object) {
                 throw ex;
             }
         }
+        if (value == null && ignoreSetNullValue(jsonReader)) {
+            return;
+        }
         propertyAccessor.setObject(object, value);
     }
 
     @Override
     public void accept(T object, Object value) {
+        if (value == null && ignoreSetNullValue()) {
+            return;
+        }
         propertyAccessor.setObject(object, value);
     }
 

core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderBool.java

@@ -32,6 +32,9 @@ public FieldReaderBool(
 
     @Override
     public void accept(T object, Object value) {
+        if (value == null && ignoreSetNullValue()) {
+            return;
+        }
         propertyAccessor.setObject(object,
                 TypeUtils.toBoolean(value));
     }
@@ -49,6 +52,10 @@ public void readFieldValue(JSONReader jsonReader, T object) {
             }
         }
 
+        if (fieldValue == null && ignoreSetNullValue(jsonReader)) {
+            return;
+        }
+
         propertyAccessor.setObject(object, fieldValue);
     }
 

core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderDate.java

@@ -69,6 +69,9 @@ public void readFieldValue(JSONReader jsonReader, T object) {
 
     @Override
     protected void accept(T object, Date value) {
+        if (value == null && ignoreSetNullValue()) {
+            return;
+        }
         propertyAccessor.setObject(object, value);
     }
 

core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderDouble.java

@@ -31,6 +31,9 @@ final class FieldReaderDouble<T, V>
 
     @Override
     public void accept(T object, Object value) {
+        if (value == null && ignoreSetNullValue()) {
+            return;
+        }
         propertyAccessor.setObject(object, value);
     }
 
@@ -51,6 +54,10 @@ public void readFieldValue(JSONReader jsonReader, T object) {
             return;
         }
 
+        if (value == null && ignoreSetNullValue(jsonReader)) {
+            return;
+        }
+
         propertyAccessor.setObject(object, value);
     }
 

core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderFloat.java

@@ -31,6 +31,9 @@ final class FieldReaderFloat<T, V>
 
     @Override
     public void accept(T object, Object value) {
+        if (value == null && ignoreSetNullValue()) {
+            return;
+        }
         propertyAccessor.setObject(object, value);
     }
 
@@ -47,6 +50,10 @@ public void readFieldValue(JSONReader jsonReader, T object) {
             }
         }
 
+        if (value == null && ignoreSetNullValue(jsonReader)) {
+            return;
+        }
+
         propertyAccessor.setObject(object, value);
     }
 

core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderInt16.java

@@ -31,6 +31,9 @@ final class FieldReaderInt16<T, V>
 
     @Override
     public void accept(T object, Object value) {
+        if (value == null && ignoreSetNullValue()) {
+            return;
+        }
         propertyAccessor.setObject(object, value);
     }
 
@@ -48,6 +51,10 @@ public void readFieldValue(JSONReader jsonReader, T object) {
             }
         }
 
+        if (value == null && ignoreSetNullValue(jsonReader)) {
+            return;
+        }
+
         propertyAccessor.setObject(object, value);
     }
 

core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderInt32.java

@@ -31,6 +31,9 @@ final class FieldReaderInt32<T, V>
 
     @Override
     public void accept(T object, Object value) {
+        if (value == null && ignoreSetNullValue()) {
+            return;
+        }
         propertyAccessor.setObject(object, value);
     }
 
@@ -47,6 +50,10 @@ public void readFieldValue(JSONReader jsonReader, T object) {
             }
         }
 
+        if (value == null && ignoreSetNullValue(jsonReader)) {
+            return;
+        }
+
         propertyAccessor.setObject(object, value);
     }
 

core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderInt64.java

@@ -32,6 +32,10 @@ final class FieldReaderInt64<T, V>
 
     @Override
     public void accept(T object, Object value) {
+        if (value == null && ignoreSetNullValue()) {
+            return;
+        }
+
         Long longValue = TypeUtils.toLong(value);
 
         if (schema != null) {
@@ -54,6 +58,10 @@ public void readFieldValue(JSONReader jsonReader, T object) {
             }
         }
 
+        if (value == null && ignoreSetNullValue(jsonReader)) {
+            return;
+        }
+
         if (schema != null) {
             schema.assertValidate(value);
         }

core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderInt8.java

@@ -31,6 +31,9 @@ final class FieldReaderInt8<T, V>
 
     @Override
     public void accept(T object, Object value) {
+        if (value == null && ignoreSetNullValue()) {
+            return;
+        }
         propertyAccessor.setObject(object, value);
     }
 
@@ -48,6 +51,10 @@ public void readFieldValue(JSONReader jsonReader, T object) {
             }
         }
 
+        if (value == null && ignoreSetNullValue(jsonReader)) {
+            return;
+        }
+
         propertyAccessor.setObject(object, value);
     }
 

core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderNumber.java

@@ -28,6 +28,9 @@ public FieldReaderNumber(
 
     @Override
     public void accept(T object, Object value) {
+        if (value == null && ignoreSetNullValue()) {
+            return;
+        }
         propertyAccessor.setObject(object, value);
     }
 
@@ -54,6 +57,10 @@ public void readFieldValue(JSONReader jsonReader, T object) {
             }
         }
 
+        if (fieldValue == null && ignoreSetNullValue(jsonReader)) {
+            return;
+        }
+
         propertyAccessor.setObject(object, fieldValue);
     }
 

core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderString.java

@@ -69,6 +69,10 @@ public void accept(T object, Object value) {
             }
         }
 
+        if (fieldValue == null && ignoreSetNullValue()) {
+            return;
+        }
+
         if (schema != null) {
             schema.assertValidate(fieldValue);
         }
@@ -98,6 +102,10 @@ public void readFieldValue(JSONReader jsonReader, T object) {
             }
         }
 
+        if (fieldValue == null && ignoreSetNullValue(jsonReader)) {
+            return;
+        }
+
         if (schema != null) {
             schema.assertValidate(fieldValue);
         }
@@ -127,6 +135,10 @@ public void readFieldValueJSONB(JSONReader jsonReader, T object) {
             }
         }
 
+        if (fieldValue == null && ignoreSetNullValue(jsonReader)) {
+            return;
+        }
+
         if (schema != null) {
             schema.assertValidate(fieldValue);
         }

core/src/main/java/com/alibaba/fastjson2/reader/ObjectReaderCreatorASM.java

@@ -3014,7 +3014,7 @@ private <T> void genReadFieldValue(
 
         MethodWriter mw = mwc.mw;
 
-        if ((fieldFeatures & JSONReader.Feature.NullOnError.mask) != 0) {
+        if ((fieldFeatures & (JSONReader.Feature.NullOnError.mask | JSONReader.Feature.IgnoreSetNullValue.mask)) != 0) {
             mw.aload(THIS);
             mw.getfield(classNameType, fieldReader(fieldReaderIndex), DESC_FIELD_READER);
             mw.aload(JSON_READER);
@@ -3028,6 +3028,31 @@ private <T> void genReadFieldValue(
 
         Label endSet_ = new Label();
 
+        // Honor JSONReader.Feature.IgnoreSetNullValue passed at parse time (context-level).
+        // Annotation-level IgnoreSetNullValue is handled by the fieldFeatures branch above.
+        // NoneDefaultConstructor uses temp locals (no OBJECT slot yet), so skip — that
+        // path needs a different fix.
+        if (!fieldClass.isPrimitive()
+                && !(context.objectReaderAdapter instanceof ObjectReaderNoneDefaultConstructor)) {
+            // if ((FEATURES & IgnoreSetNullValue.mask) != 0) { fieldReader.readFieldValue(jsonReader, object); goto endSet_; }
+            Label noFallback_ = new Label();
+            mw.lload(FEATURES);
+            mw.visitLdcInsn(JSONReader.Feature.IgnoreSetNullValue.mask);
+            mw.land();
+            mw.lconst_0();
+            mw.lcmp();
+            mw.ifeq(noFallback_);
+
+            mw.aload(THIS);
+            mw.getfield(classNameType, fieldReader(fieldReaderIndex), DESC_FIELD_READER);
+            mw.aload(JSON_READER);
+            mw.aload(OBJECT);
+            mw.invokevirtual(TYPE_FIELD_READE, "readFieldValue", METHOD_DESC_READ_FIELD_VALUE);
+            mw.goto_(endSet_);
+
+            mw.visitLabel(noFallback_);
+        }
+
         String TYPE_FIELD_CLASS = ASMUtils.type(fieldClass);
         String DESC_FIELD_CLASS = ASMUtils.desc(fieldClass);