java - How to obtain the length of VARCHAR2 attribute declared in Oracle Object Type, using OracleTypeCHAR metadata, regardless of database character set -

my java application depends on oracle object types metadata. use oracle.jdbc.oracore.oracletypechar class access these metadata jdbc. after converting database charset al32utf8, oracletypechar#getlength() method returns results multiplied factor of 4 comparing declared in oracle object type - example:

some_attribute varchar2(10) 

would result in lenght 40, when lenght 10 returned previous charset. there way obtain raw value pl/sql without parsing oot source code?

the character length character column can found in user_tab_columns.char_length,

select column_name, comments all_col_comments table_name = 'user_tab_columns';  column_name          comments  table_name           table, view or cluster name column_name          column name data_type            datatype of column data_type_mod        datatype modifier of column data_type_owner      owner of datatype of column data_length          length of column in bytes data_precision       length: decimal digits (number) or binary digits (float) data_scale           digits right of decimal point in number nullable             column allow null values? column_id            sequence number of column created default_length       length of default value column data_default         default value column num_distinct         number of distinct values in column low_value            low value in column high_value           high value in column density              density of column num_nulls            number of nulls in column num_buckets          number of buckets in histogram column last_analyzed        date of recent time column analyzed sample_size          sample size used in analyzing column character_set_name   character set name char_col_decl_length declaration length of character type column global_stats         statistics calculated without merging underlying partitions? user_stats           statistics entered directly user? avg_col_len          average length of column in bytes char_length          maximum length of column in characters char_used            c maximum length given in characters, b if in bytes v80_fmt_image        column data in 8.0 image format? data_upgraded        has column data been upgraded latest type version format? histogram 

use query find character length of column,

select   char_length   user_tab_columns   table_name = 't' , column_name = 'some_attribute';