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Parity with Gson behavior where we use runtime type of an object while serializing instead of the declared type of the field.

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This commit is contained in:
Inderjeet Singh 2011-08-03 03:19:43 +00:00
parent 5c620c7e0a
commit 2813385c33
2 changed files with 16 additions and 2 deletions
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2
gson/src/main/java/com/google/gson/ReflectingFieldNavigator.java
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@ -74,7 +74,7 @@ final class ReflectingFieldNavigator {
}
@SuppressWarnings("unchecked")
private Type getMoreSpecificType(Type type, Object obj, FieldAttributes fieldAttributes) {
private static Type getMoreSpecificType(Type type, Object obj, FieldAttributes fieldAttributes) {
try {
if (obj != null && (Object.class == type || type instanceof TypeVariable)) {
Object fieldValue = fieldAttributes.get(obj);

16
gson/src/main/java/com/google/gson/internal/bind/ReflectiveTypeAdapter.java
View File

@ -21,6 +21,7 @@ import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.util.LinkedHashMap;
import java.util.Map;
@ -122,7 +123,11 @@ public final class ReflectiveTypeAdapter<T> extends TypeAdapter<T> {
@Override void write(JsonWriter writer, Object value)
throws IOException, IllegalAccessException {
Object fieldValue = field.get(value);
((TypeAdapter) typeAdapter).write(writer, fieldValue);
Type declaredTypeOfField = fieldType.getType();
Type resolvedTypeOfField = getMoreSpecificType(declaredTypeOfField, value, fieldValue);
TypeAdapter t = resolvedTypeOfField != declaredTypeOfField ?
context.getAdapter(TypeToken.get(resolvedTypeOfField)) : this.typeAdapter;
t.write(writer, fieldValue);
}
@Override void read(JsonReader reader, Object value)
throws IOException, IllegalAccessException {
@ -132,6 +137,15 @@ public final class ReflectiveTypeAdapter<T> extends TypeAdapter<T> {
};
}
private static Type getMoreSpecificType(Type type, Object obj, Object fieldValue) {
if (obj != null && (Object.class == type || type instanceof TypeVariable)) {
if (fieldValue != null) {
type = fieldValue.getClass();
}
}
return type;
}
public static class FactoryImpl implements Factory {
public boolean serializeField(Class<?> declaringClazz, Field f, Type declaredType) {
return true;