Thank you for the explanation. On 5/21/07, Adriano Crestani <[EMAIL PROTECTED]> wrote:
Yes, it's intergrated with Tuscany SDO C++. Next step is to implement a sample for it. I intend to add some info on wiki before the first release. Regards, Adriano Crestani On 5/21/07, haleh mahbod <[EMAIL PROTECTED]> wrote: > > Hi Adriano, > > Is this integrated with SDO C++? Is there a sample for it? > Can more information be added to the home page and user guide[1]? > > > [1] http://cwiki.apache.org/confluence/pages/viewpage.action?pageId=46512 > > Haleh > > On 5/20/07, Adriano Crestani <[EMAIL PROTECTED]> wrote: > > > > Actually is being developed the Tuscany DAS C++. So far, the framework > can > > perform the following: > > > > - Convetion Over Configuration(COC): > > > > - DAS assumes that a column named xxx_id is a FK to the column named > > id on table xxx. > > - If no PK column is found on the ResultSet, it sets the column named > > id as PK, if exists. > > - The COCs defined above are, actually, case sensitive and, for > > example, a column named ID will not be set as PK > > > > > > - The das is using the ResultSet metadata(column name, column data type > > and > > column table) to generate the sdo graph and popule it. The DAS > guarantees > > the table object uniqueness on graph basing on the table PK, so the > first > > table retrieved by the ResultSet will be taken, and any other table > > containing the same PK ignored: > > > > > > - A table may contain a simple PK or a composite one. > > - If no PK is defined for the table, the DAS tries to find one using > > COC. > > - If the table has a composite PK and not all the columns that > > compound the PK are contained on the ResultSet, the DAS ignores the > > defined > > composite PK and tries to find another PK using COC as defined above. > > - If no PK is found using COC, the DAS sets all columns on ResultSet > > as PK. > > > > - Setting the references on graph objects basing on table relationships. > > > > - Actually, there may be up to 1 relationship between 2 tables. > > - The columns data that compound the FK are not created on the graph. > > - The DAS accepts simple or composite relationships. > > - If not all the columns, PK or FK, that compound the relationship > are > > on the ResultSet, the relationship is ignored and the remaining FK > are > > loaded onto graph. > > > > - Actually, the DAS config can only be set from code. > > > > - There are also implemented some testcases. > > > > - DAS is only supporting the following SQL types: INTEGER, REAL, CHAR, > > VARCHAR, FLOAT, DOUBLE. > > > > Next steps: > > > > - Read the config from a xml file. > > > > - To implement a sample that reads some data from a database and print > on > > console. > > > > - Implement support for more SQL types. > > > > > > Comments and suggestions will be appreciated : ) > > > > Any volunteer would be helpful ; ) > > > > > > Regards, > > > > Adriano Crestani > > >
