Helfer SpecialScore

Jan Burse, erstellt 24. Mär 2019
package jekpro.frequent.basic;
import jekpro.model.inter.AbstractSpecial;
import jekpro.model.inter.Engine;
import jekpro.model.molec.Display;
import jekpro.model.molec.EngineMessage;
import jekpro.reference.structure.SpecialUniv;
import jekpro.tools.term.AbstractSkel;
import jekpro.tools.term.SkelCompound;
/**
* <p>Provides built-in predicates for the module foreign.</p>
* <p/>
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
* <p/>
* Rights & License
* All industrial property rights regarding the information - copyright
* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
* <p/>
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
* <p/>
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
* <p/>
* Trademarks
* Jekejeke is a registered trademark of XLOG Technologies GmbH.
*/
public final class SpecialScore extends AbstractSpecial {
private final static int SPECIAL_SYS_TYPE_OF = 0;
/**
* <p>Create a score special.</p>
*
* @param i The id of the special.
*/
public SpecialScore(int i) {
super(i);
}
/**
* <p>Logically evaluate a term in a list of goals for the first time.</p>
* <p>The term is passed via the skel and display of the engine.</p>
* <p>The continuation is passed via the r and u of the engine.</p>
* <p>The new continuation is returned via the skel and display of the engine.</p>
*
* @param en The engine.
* @return True if the predicate succeeded, otherwise false.
* @throws EngineMessage Shit happens.
*/
public final boolean moniFirst(Engine en)
throws EngineMessage {
switch (id) {
case SPECIAL_SYS_TYPE_OF:
Object[] temp = ((SkelCompound) en.skel).args;
Display ref = en.display;
Object m = SpecialUniv.derefAndCastRef(temp[0], ref);
if (!(m instanceof Class))
throw new EngineMessage(EngineMessage.domainError(
EngineMessage.OP_DOMAIN_CLASS, m));
Class clazz = (Class) m;
en.skel = temp[1];
en.display = ref;
en.deref();
if ((en.skel instanceof AbstractSkel || en.skel instanceof Number) ||
!clazz.isInstance(en.skel))
return false;
return true;
default:
throw new IllegalArgumentException(AbstractSpecial.OP_ILLEGAL_SPECIAL);
}
}
}

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