Just curious why not just use ...
Map idMap = <cayenneObject>.getObjectId().getIdSnapshot();
This map would contain the primary keys and values. You may have to
test for isTemporary(), and maybe null.
-- Joshua T. Pyle Go has always existed.On 2/3/06, Ryan Holmes <rya..yperstep.com> wrote: > I don't think there is an easy way to do what you want. I'm sure you > could get a handle to the ObjEntity for the current class, then iterate > through its DbAttributes, check isPrimaryKey() and ultimately read the > primary key properties but I wouldn't recommend coupling your classes so > tightly to an ORM (not to mention the potential performance issues). > > There are also a lot of good reasons not to rely on a superclass's > equals() method in the first place. My advice is to stick to the > principals of good class design and just implement equals() in your classes. > > Hope that helps, > -Ryan > > Arnaud Garcia wrote: > > hi ryan, > > you right, my PK are in the XML and I just need to compare the > > properties ... > > But, my second question was: Is there a method to return all the PK > > atributes of an object ? (of course I can look at my model, but I > > would like to create a general method ....) > > > > for example: > > o1 - > > (String) field1 : PK > > (Integer) field 2: PK > > (String) field3 > > (String) field4 > > > > something general, like o1.getPrimarykeyAttributes() which will return > > field1 and field2 > > > > thanks > > arnaud > > > > > > Ryan Holmes a écrit : > > > >> I'm confused - in your code snippet, o2.getObjectId() *should* return > >> null because o2 is a new object and the PK value is unknown at that > >> point. What kind of PK's are you working with: > >> auto-increment/sequence, composite, natural or what? > >> > >> You mentioned that your data is coming from XML. Are the primary key > >> values already assigned in the XML? > >> > >> My guess is that you simply need to expose your primary key value(s) > >> as regular properties and use their getters in your equals() method, > >> but I may not understand the situation. > >> > >> See http://objectstyle.org/confluence/display/CAY/Mapping+Primary+Keys > >> > >> -Ryan > >> > >> Arnaud Garcia wrote: > >> > >>> thanks Andrus, > >>> > >>> Well, I can't do this.... > >>> if o1 is in a dataContext, for example o1 is a child of O. > >>> if I build o2 from nothing, o2 = new o2(), o2.set ... ect.. > >>> then if I do: > >>> system.out.println(o1.getObjectid()), I will have all the values of o1 > >>> BUT > >>> a println of o2.getObjectid() return null ! > >>> > >>> So to solve my problem, I did a simple fields comparison between > >>> the PK attributes of o1 and o2 and it works ... but I thought there > >>> was another way. > >>> > >>> thanks > >>> arnaud > >>> > >>> > >>> Andrus Adamchik a écrit : > >>> > >>>> getPrimaryKeys() in Cayenne is getObjectId()... So you can do > >>>> "o1.getObjectid().equals(o2.getObjectId())" comparison. > >>>> > >>>> Andrus > >>>> > >>>> > >>>> On Jan 31, 2006, at 12:25 PM, Arnaud Garcia wrote: > >>>> > >>>>> Hello, > >>>>> > >>>>> Is there a way to get all the primary keys attributes of a > >>>>> CayenneDataObject to compare it with another one? > >>>>> > >>>>> What I need to do: > >>>>> I have another xml datasource which sends some objects, and I > >>>>> need to compare these objects before adding them to another > >>>>> object (one to many relationship) ... so I need to compare them > >>>>> with their primary keys. > >>>>> > >>>>> if > >>>>> anObject.getPrimaryKeys().equal(maybeTheSameObject.getPrimaryKeys() > >>>>> then > >>>>> // do nothing > >>>>> else > >>>>> containerObject.addTo(anObject) > >>>>> > >>>>> => If I don't test the object before adding it, I have a > >>>>> violation constrainst ... > >>>>> > >>>>> thanks for help > >>>>> > >>>>> arnaud > >>>>> > >>>>> > >>>>> > >>>> > >>>> > >>> > >>> > >> > > > > >
This archive was generated by hypermail 2.0.0 : Fri Feb 03 2006 - 11:17:56 EST