@Nullable
    public Type<?> getType(String table, String column) {
        Map<String,Type<?>> columns = typeByColumn.get(table);
        if (columns != null) {
            return columns.get(column);
        } else {
            return null;
        }
    }
{@code JavaTypeMapping} provides a mapping from Class to Type instances

@author tiwe
querydsl-sql/src/main/java/com/querydsl/sql/JavaTypeMapping.java