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Home > Archive > Apache JDO Project > August 2005 > Additional fields for FieldsOfSimpleInterface, FieldsOfSimpleClass,
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Additional fields for FieldsOfSimpleInterface, FieldsOfSimpleClass,
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| Michelle Caisse 2005-08-02, 5:45 pm |
| Hi,
We would like to recognize three ways of mapping PC object types as fields:
1. Serialized in the primary table (<field serialized="true"> )
2. Embedded in the primary table (<field embedded="true"> )
3. Referenced in a table of their own (<field embedded="false"> or
embedded not specified)
The existing fieldtypes classes cover many combinations of cases, but
they do not cover serialized. I propose that we add 24 new fields to
FieldsOfSimpleInterface, FieldsOfSimpleClass, FieldsOfObject, patterned
on the existing fields for embedded, added to the end of the sequence to
avoid renumbering (taking FieldsOfSimpleInterface as an example):
"serialized= true private SimpleInterface SimpleInterface144",
"persistence-modifier= persistent serialized= true private
SimpleInterface SimpleInterface145",
"persistence-modifier= persistent serialized= true private transient
SimpleInterface SimpleInterface146",
"serialized= true private volatile SimpleInterface SimpleInterface147",
"persistence-modifier= persistent serialized= true private volatile
SimpleInterface SimpleInterface148",
"persistence-modifier= persistent serialized= true private transient
volatile SimpleInterface SimpleInterface149"
"serialized= true public SimpleInterface SimpleInterface150",
"persistence-modifier= persistent serialized= true public
SimpleInterface SimpleInterface151",
"persistence-modifier= persistent serialized= true public transient
SimpleInterface SimpleInterface152",
"serialized= true public volatile SimpleInterface SimpleInterface153",
"persistence-modifier= persistent serialized= true public volatile
SimpleInterface SimpleInterface154",
"persistence-modifier= persistent serialized= true public transient
volatile SimpleInterface SimpleInterface155",
"serialized= true protected SimpleInterface SimpleInterface156",
"persistence-modifier= persistent serialized= true protected
SimpleInterface SimpleInterface157",
"persistence-modifier= persistent serialized= true protected
transient SimpleInterface SimpleInterface158",
"serialized= true protected volatile SimpleInterface SimpleInterface159",
"persistence-modifier= persistent serialized= true protected volatile
SimpleInterface SimpleInterface160",
"persistence-modifier= persistent serialized= true protected
transient volatile SimpleInterface SimpleInterface161",
"serialized= true SimpleInterface SimpleInterface162",
"persistence-modifier= persistent serialized= true SimpleInterface
SimpleInterface163",
"persistence-modifier= persistent serialized= true transient
SimpleInterface SimpleInterface164",
"serialized= true volatile SimpleInterface SimpleInterface165",
"persistence-modifier= persistent serialized= true volatile
SimpleInterface SimpleInterface166",
"persistence-modifier= persistent serialized= true transient volatile
SimpleInterface SimpleInterface167"
The mapping and schema for the three cases would be:
....
<field name="SimpleInterface1" >
<embedded>
<field name="intField" column="INTFIELD1"/>
<field name="stringField" column="STRINGFIELD1"/>
</embedded>
</field>
<field name="SimpleInterface102" column="SIMPLEINTERFACE102"
embedded="false">
<foreign-key/>
</field>
<field name="SimpleInterface144" column="SIMPLEINTERFACE102"
serialized="true"/>
...
CREATE TABLE FIELDSOFSIMPLEINTERFACE
(
IDENTIFIER INTEGER NOT NULL,
INTFIELD1 INTEGER, STRINGFIELD1 VARCHAR(1024),
SIMPLEINTERFACE102 BIGINT REFERENCES SIMPLE_CLASS,
SIMPLEINTERFACE144 LONG VARCHAR FOR BIT DATA,
....
)
Comments?
-- Michelle
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