so you mean p1 : Person() p2 : Person() eval ( p1.equals(p2) ) (but presumably a shorthand form?)
On 4/8/06, Mark Proctor <[EMAIL PROTECTED]> wrote: > > We hadn't planned it, not promising anything - but I'll see how things > pan out, may be we will get time. > > Mark > Juergen wrote: > > ad. Can object equality for assertion be customized? > > Drools 3 still seems to use IdentityMap with System.identityHashCode(). > > Is it planned to be customizeable e.g. with equals() in 3.0? > > > > Michael Neale wrote: > >> Short answer, not easily with Drools 2. But yes, with Drools 3. > >> > >> On 3/22/06, Juergen <[EMAIL PROTECTED]> wrote: > >> > >>> I recently looked into drools after experimenting with JESS and got a > >>> few questions I could not look up in the drools documentation: > >>> > >>> - Exists a condition to test for non-existence of a matching > >>> object/fact? > >>> -- If yes, how to use it for own domain specific language conditions > >>> > >>> - How is sharing of conditions/nodes between productions implemented > in > >>> drools, one of the main benefits of the rete algorithm? > >>> -- How is the equality of conditions defined for java smf? via textual > >>> equality of the condition's java code? > >>> -- How can equality of conditions for sharing be defined for domain > >>> specific language conditions? > >>> e.g. Conway's game of life (slightly modified dsl) > >>> <rule name="kill the overcrowded"> > >>> <conway:cellIsAlive cellName="cell"/> > >>> <conway:cellIsOverCrowded cellName="cell"/> > >>> <conway:killCell cellName="cell"/> > >>> </rule> > >>> <rule name="kill the lonely"> > >>> <conway:cellIsAlive cellName="cell"/> > >>> <conway:cellIsLonely cellName="cell"/> > >>> <conway:killCell cellName="cell"/> > >>> </rule> > >>> > >>> The conway:cellIsAlive condition could be shared between these two > >>> productions. Would it? > >>> > >>> - When will the properties map be supported in drools implementation > of > >>> JSR 94 javax.rules API? > >>> -- e.g. to be able to set conflict resolver of a rule base and other > >>> settings that can be set via drools native API > >>> > >>> - Can object equality for assertion be customized? > >>> -- Currently, org.drools.util.IdentityMap > >>> (org.drools.reteoo.WorkingMemoryImpl) makes use of > >>> System.identityHashCode(). There seems to be no way to customize that, > >>> e.g. make drools use equals() instead, neither via native nor JSR 94 > >>> API. > >>> > >>> My apologies if some questions have already been answered in other > >>> postings, I made no thorough search in this newsgroup yet. > >>> > >>> Thanks a lot, Juergen > > > > > > > >
