Helfer MemberFunction

Jan Burse, erstellt 04. Jan 2019
package jekpro.tools.foreign;
import jekpro.model.inter.Engine;
import jekpro.model.molec.BindCount;
import jekpro.model.molec.Display;
import jekpro.model.molec.EngineException;
import jekpro.model.molec.EngineMessage;
import jekpro.model.pretty.AbstractSource;
import jekpro.reference.reflect.SpecialForeign;
import jekpro.tools.array.AbstractDelegate;
import jekpro.tools.array.AbstractFactory;
import jekpro.tools.array.Types;
import jekpro.tools.term.AbstractTerm;
import jekpro.tools.term.MutableBit;
import jekpro.tools.term.SkelAtom;
import jekpro.tools.term.SkelCompound;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
/**
* <p>Specialization of a delegate for a number function.</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.
*/
final class MemberFunction extends AbstractMember {
private static final String OP_FOREIGN_FUN = "foreign_fun";
private final Method method;
/**
* <p>Create function evaluable function.</p>
*
* @param m The method.
*/
MemberFunction(Method m) {
method = m;
subflags |= MASK_DELE_ARIT;
subflags |= MASK_METH_FUNC;
}
/**
* <p>Retrieve the proxy that is wrapped.</p>
*
* @return The proxy.
*/
public Member getProxy() {
return method;
}
/************************************************************************************/
/* Accessible Protocol */
/************************************************************************************/
/**
* <p>Retrieve the modifier flags as an int.</p>
*
* @return The modifier flags as an int.
*/
public int getModifiers() {
return method.getModifiers();
}
/**
* <p>Retrieve the return type as Java class.</p>
*
* @return The return type as Java class.
*/
public Class getReturnType() {
return method.getReturnType();
}
/**
* <p>Retrieve the parameter types as Java classes.</p>
*
* @return The parameter types as Java classes.
*/
public Class[] getParameterTypes() {
return method.getParameterTypes();
}
/**
* <p>Retrieve the declaring Java class.</p>
*
* @return The declaring Java class.
*/
public Class getDeclaringClass() {
return method.getDeclaringClass();
}
/************************************************************************************/
/* Execution Service */
/************************************************************************************/
/**
* <p>Arithmetically evaluate a compound.</p>
* <p>The evaluable 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 result is passed via the skel and display of the engine.</p>
*
* @param en The engine.
* @throws EngineMessage FFI error.
* @throws EngineException FFI error.
*/
public final boolean moniEvaluate(Engine en)
throws EngineMessage, EngineException {
Object temp = en.skel;
Display ref = en.display;
Object obj = convertRecv(temp, ref);
Object[] args = computeAndConvertArgs(temp, ref, en);
Object res = invokeMethod(method, obj, args, en);
res = Types.normJava(encoderet, res);
if (res == null)
throw new EngineMessage(EngineMessage.representationError(
AbstractFactory.OP_REPRESENTATION_NULL));
en.skel = AbstractTerm.getSkel(res);
en.display = AbstractTerm.getDisplay(res);
Object check = AbstractTerm.getMarker(res);
return (check != null && ((MutableBit) check).getBit());
}
/***************************************************************/
/* Special Predicates */
/***************************************************************/
/**
* <p>Compute a hash code.</p>
*
* @return The hash code of this delegate.
*/
public int hashCode() {
return method.hashCode();
}
/**
* <p>Compare with another delegate.</p>
*
* @param o The other delegate.
* @return True if this delegate equals the other delegate, otherwise false.
*/
public boolean equals(Object o) {
if (!(o instanceof MemberFunction))
return false;
MemberFunction def = (MemberFunction) o;
return method.equals(def.method);
}
/**
* <p>Generate the spec of this delegate.</p>
*
* @param source The source.
* @param en The engine.
* @return The spec.
* @throws EngineMessage FFI error.
*/
public Object toSpec(AbstractSource source, Engine en)
throws EngineMessage {
return new SkelCompound(new SkelAtom(OP_FOREIGN_FUN),
SpecialForeign.classToName(method.getDeclaringClass(), source, en),
SpecialForeign.methodToCallable(method.getName(),
method.getParameterTypes(), source, en));
}
/***************************************************************/
/* Foreign Predicates */
/***************************************************************/
/**
* <p>Retrieve a name guess.</p>
*
* @return The name guess, or null.
*/
public String getFun() {
return method.getName();
}
/**
* <p>Convert the delegate to a string.</p>
*
* @return The string.
*/
public String toString() {
return method.toString() + " (evaluable)";
}
}

Kommentare