/**
* Invokes a method.
*
* @param o the object of the method that is to be invoked
* @param methodName name of the method that is to be invoked
* @param params all of the methods parameters. If params consists of class objects the parameter
* values from the gui will be used (TOTO isn't there a cleaner way?)
* @return the return value of the method
*/
private Object invoke(Object o, String methodName, Object... params)
throws InvocationTargetException {
ArrayList<Class> paramTypes = new ArrayList<Class>();
for (Object p : params) {
Class c = p.getClass();
paramTypes.add(c);
}
MethodDescription methodDescription =
this.getMethodDescription(o, methodName, paramTypes.toArray(new Class[] {}));
if (methodDescription != null) {
this.invoke(methodDescription);
return methodDescription.getReturnValue();
}
return null;
}
/**
* Invokes the method specified by a method description.
*
* @param methodDescription the method description of the method that is to be invoked.
*/
protected void invoke(MethodDescription methodDescription) throws InvocationTargetException {
VParamUtil.throwIfNull(methodDescription);
Object o = getObject(methodDescription.getObjectID());
ObjectDescription oDesc = getObjectDescription(o);
if (o == null) {
throw new IllegalStateException("Object must not be null!");
}
if (methodDescription.getMethodType() == MethodType.REFERENCE) {
Object[] parameters = methodDescription.getParameters();
// error handling
if (parameters.length > 1) {
throw new IllegalArgumentException(
"More than one parameter " + "for reference methods is not allowed!");
}
if (parameters.length > 0 && parameters[0] != null) {
methodDescription.setReturnValue(parameters[0]);
} else {
methodDescription.setReturnValue(o);
}
} else if (o instanceof ProxyObject) {
ProxyObject proxy = (ProxyObject) o;
methodDescription.setReturnValue(proxy.invoke(methodDescription));
if (!methodDescription
.getReturnType()
.equals(methodDescription.getReturnValue().getClass())) {
System.err.println(">> ProxyObject: wrong type of return value!");
generateErrorMessage(">> ProxyObject:" + " wrong type of return value!", methodDescription);
}
} else if (methodDescription.getMethodType() == MethodType.DEFAULT
|| methodDescription.getMethodType() == MethodType.CUSTOM_REFERENCE) {
Method m = null;
try {
m =
o.getClass()
.getMethod(
methodDescription.getMethodName(), methodDescription.getParameterTypes());
// access this method even if language visibility forbids
// invocation of this method
m.setAccessible(true);
methodDescription.setReturnValue(m.invoke(o, methodDescription.getParameters()));
} catch (NoSuchMethodException ex) {
Logger.getLogger(ObjectInspector.class.getName()).log(Level.SEVERE, null, ex);
generateErrorMessage(
methodDescription.getMethodName() + "(): " + ex.toString(), methodDescription);
} catch (IllegalAccessException ex) {
Logger.getLogger(ObjectInspector.class.getName()).log(Level.SEVERE, null, ex);
generateErrorMessage(
methodDescription.getMethodName() + "(): " + ex.toString(), methodDescription);
} catch (IllegalArgumentException ex) {
System.err.println(">> ObjectInspector:" + " invoked method with wrong arguments!");
String yourParamStr = "";
String expectedParamStr = "";
if (methodDescription.getParameters() != null) {
for (int i = 0; i < methodDescription.getParameters().length; i++) {
Object parameter = methodDescription.getParameters()[i];
if (parameter != null) {
yourParamStr += parameter.getClass().getName() + " ";
} else {
yourParamStr += "null ";
}
}
} else {
yourParamStr = "no parameters given!";
}
for (int i = 0; i < m.getParameterTypes().length; i++) {
expectedParamStr += m.getParameterTypes()[i].getName() + " ";
}
System.err.println(" your parameters: " + yourParamStr);
System.err.println(" expected parameters: " + expectedParamStr);
generateErrorMessage(
methodDescription.getMethodName() + "(): method invoked with wrong arguments!",
methodDescription);
} catch (InvocationTargetException ex) {
Logger.getLogger(ObjectInspector.class.getName()).log(Level.SEVERE, null, ex);
generateErrorMessage(methodDescription, ex.getCause());
throw ex;
} catch (SecurityException ex) {
Logger.getLogger(ObjectInspector.class.getName()).log(Level.SEVERE, null, ex);
generateErrorMessage(
methodDescription.getMethodName() + "(): " + ex.toString(), methodDescription);
}
} // end else if (o instanceof ProxyObject)
}