MJavaClass.java

gehe zur Dokumentation dieser Datei

package de.lathanda.eos.vm;
 
import java.util.TreeMap;
 
import de.lathanda.eos.vm.exceptions.TypeMissMatchException;
 
public class MJavaClass implements MType {
    public final static MType BASE = new MJavaClass("base", Object.class, () -> {
        return null;
    });
    private final Class<?> cls;
    private final ObjectSource objSrc;
    private final String id;
 
    public MJavaClass(String id, Class<?> cls, ObjectSource objSrc) {
        this.cls = cls;
        this.objSrc = objSrc;
        this.id = id;
    }
 
    @Override
    public Object checkAndCast(Object obj) {
        return checkAndCast(cls, obj);
    }
 
    private Object checkAndCast(Class<?> c, Object obj) {
        if (obj instanceof Integer && c == double.class) {
            return ((Integer) obj).doubleValue();
        } else if (obj instanceof Double && c == int.class) {
            return ((Double) obj).intValue();
        } else if (obj instanceof Integer && c == int.class) {
            return obj;
        } else if (obj instanceof Boolean && c == boolean.class) {
            return obj;
        } else if (obj instanceof Double && c == double.class) {
            return obj;
        } else if (obj instanceof MObject) {
            return checkAndCast(c, ((MObject) obj).getJavaObject());
        } else if (c.isInstance(obj)) {
            return obj;
        } else if (obj instanceof Variable) {
            return checkAndCast(c, ((Variable) obj).get());
        } else if (c == String.class) {
            return obj.toString();
        }
        // wrong type that cannot be converted to fit
        throw new TypeMissMatchException(c.toString(), obj.getClass().toString());
    }
 
    @Override
    public String getID() {
        return id;
    }
 
    @Override
    public boolean isAbstract() {
        return objSrc == null;
    }
 
    @Override
    public Object newInstance(Machine m) throws InstantiationException, IllegalAccessException {
        if (objSrc != null) {
            return objSrc.createObject();
        } else {
            return null;
        }
    }
 
    @Override
    public Object createJavaObject(Machine m) throws Exception {
        return newInstance(m);
    }
 
    @Override
    public TreeMap<String, Variable> createProperties(Machine m) {
        return new TreeMap<>();
    }
 
}