Method.java

gehe zur Dokumentation dieser Datei

package de.lathanda.eos.vm.commands;
 
import java.lang.reflect.InvocationTargetException;
 
import de.lathanda.eos.vm.Command;
import de.lathanda.eos.vm.MObject;
import de.lathanda.eos.vm.MType;
import de.lathanda.eos.vm.Machine;
import de.lathanda.eos.vm.Variable;
import de.lathanda.eos.vm.exceptions.NullAccessException;
 
public class Method extends Command {
    private final MType[] parameters;
    private final java.lang.reflect.Method method;
 
    public Method(MType[] parameters, java.lang.reflect.Method method) {
        this.parameters = parameters;
        this.method = method;
    }
 
    @Override
    public boolean execute(Machine m) throws Exception {
        Object target = m.pop();
        Object[] args = new Object[parameters.length];
        for (int i = 0; i < args.length; i++) {
            args[i] = m.pop();
            args[i] = parameters[i].checkAndCast(args[i]);
        }
        if (target == null) {
            throw new NullAccessException();
        }
        try {
            Object result;
            if (target instanceof MObject) {
                result = method.invoke(((MObject) target).getJavaObject(), args);
            } else if (target instanceof Variable) {
                result = method.invoke(((Variable) target).get(), args);
            } else {
                result = method.invoke(target, args);
            }
            if (result != null) {
                m.push(result);
            }
        } catch (InvocationTargetException ite) {
            throw (Exception) ite.getTargetException();
        }
        return true;
    }
 
    @Override
    public String toString() {
        return "Method{" + method.getName() + "(" + parameters.length + ") }";
    }
 
}