Algorithm for generating serialVersionUID for java entities

I could suggest the following way for generating serialVersionUID for java entities.
It is staible in sense that it depends only on your schema, not JVM/time or date of creation.
On other hand it depends on all fields in entity.

If we have next n fields:
typeName_1 fieldName_1;
typeName_2 fieldName_2;
...
typeName_n fieldName_n;

we could calculate
serialVersionUID =
(fieldName_1.hashCode() XOR typeName_1.hashCode()) * 31^0+
(fieldName_2.hashCode() XOR typeName_2.hashCode()) * 31^1 + ... +
(fieldName_n.hashCode() XOR typeName_n.hashCode()) * 31^n

where fieldName_i.hashCode() is hashCode() of fieldName_i string
(for int id; it will be "id".hashCode())
and typeName_i.hashCode() is hashCode() of typeName_i string
(for int id; it will be "int".hashCode())

so, we will be independent from
1) JVM
2) time/date of creation
and depend on
1) fields order
2) field types
3) field names