/**
* Generates a new error message based on the excpetion message.
*
* @param message the rror message
*/
public void generateErrorMessage(String message, MethodDescription mDesc) {
ObjectDescription oDesc = getObjectDescription(getObject(mDesc.getObjectID()));
String methodName = oDesc.getName() + "." + mDesc.getMethodName() + "()";
System.err.println("Method \"" + methodName + "\" can't be invoked:" + message);
}
/**
* 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;
}
/**
* Returns the description of a method.
*
* @param o object of the method
* @param methodName name of the method
* @param params method parameters
* @return description of the method or <code>null</code> if the requested method could not be
* found
*/
public MethodDescription getMethodDescription(Object o, String methodName, Class... params) {
ObjectDescription oDesc = getObjectDescription(o);
MethodDescription result = null;
ArrayList<Class> paramTypes = new ArrayList<Class>();
for (Class<?> p : params) {
// Class c = p.getClass();
paramTypes.add(p);
}
for (MethodDescription mDesc : oDesc.getMethods()) {
if (mDesc.getMethodName().equals(methodName)) {
// System.out.println("M: " + mDesc.getMethodName());
boolean isEqual = true;
for (int i = 0; i < mDesc.getParameterTypes().length; i++) {
// System.out.println(">> P: " +
// mDesc.getParameterTypes()[i].getName());
// System.out.println(">> PE: " + paramTypes.get(i).getName());
if (!paramTypes.get(i).equals(mDesc.getParameterTypes()[i])) {
isEqual = false;
break;
}
}
if (isEqual) {
result = mDesc;
result.setParameters(params);
break;
}
}
}
// if (result == null) {
// System.err.println(">> MethodDescription not found!"
// + " Wrong name or wrong parameters?");
// }
return result;
}
/**
* Returns the description of a method.
*
* @param o object of the method
* @param methodName name of the method
* @param params method parameters
* @return description of the method
*/
public MethodDescription getMethodDescriptionFromGUI(
Object o, String methodName, Object... params) {
ObjectDescription oDesc = getObjectDescription(o);
MethodDescription result = null;
// ArrayList<Class> paramTypes = new ArrayList<Class>();
//
// for (Object p : params) {
// Class c = p.getClass();
// paramTypes.add(c);
// }
for (MethodDescription mDesc : oDesc.getMethods()) {
if (mDesc.getMethodName().equals(methodName)) {
boolean isEqual = true;
for (int i = 0; i < mDesc.getParameterTypes().length; i++) {
if (!params[i].equals(mDesc.getParameterTypes()[i])) {
isEqual = false;
break;
}
}
if (isEqual) {
result = mDesc;
result.setParameters(params);
break;
}
}
}
if (result == null) {
System.out.println(">> MethodDescription not found!" + " Wrong name or wrong parameters?");
}
return result;
}
public ObjectDescription generateObjectDescription(Object o, Integer objID, boolean addObject) {
ObjectDescription result = null;
// Object annotations
ObjectInfo objectInfo = null;
Annotation[] objectAnnotations = o.getClass().getAnnotations();
for (Annotation a : objectAnnotations) {
if (a.annotationType().equals(ObjectInfo.class)) {
objectInfo = (ObjectInfo) a;
break;
}
}
if (addObject) {
ObjectEntry oEntry = new ObjectEntry(o);
if (objID != null) {
objects.addWithID(oEntry, objID);
} else {
objects.add(oEntry);
objID = oEntry.getID();
}
}
boolean hasCustomReferenceMethod = false;
// we need special treatment for proxy objects
if (o instanceof ProxyObject) {
ProxyObject proxy = (ProxyObject) o;
result = proxy.getObjectDescription();
result.setName(o.getClass().getName());
result.setID(objID);
// update objID of methods
for (MethodDescription mDesc : result.getMethods()) {
mDesc.setObjectID(objID);
}
} else {
result = new ObjectDescription();
result.setInfo(objectInfo);
result.setName(o.getClass().getName());
result.setID(objID);
Class<?> c = o.getClass();
Method[] theMethods = null;
if (objectInfo != null && objectInfo.showInheritedMethods()) {
theMethods = c.getMethods();
} else {
ArrayList<Method> methods = new ArrayList<Method>();
// methods declared by class c
for (Method m : c.getDeclaredMethods()) {
methods.add(m);
}
// methods declared in superclasses of c
for (Method m : c.getMethods()) {
MethodInfo info = m.getAnnotation(MethodInfo.class);
// if m is marked as inheritGUI this method will
// be visualized even if it is a method declared
// in a superclass of c
if (info != null && info.inheritGUI()) {
if (!methods.contains(m)) {
methods.add(m);
}
}
}
Method[] tmpArray = new Method[methods.size()];
theMethods = methods.toArray(tmpArray);
}
for (int i = 0; i < theMethods.length; i++) {
// filter groovy object specific methods
String method = theMethods[i].getName();
boolean isGroovyObject = o instanceof GroovyObject;
boolean isGroovyMethod =
method.equals("setProperty")
|| method.equals("getProperty")
|| method.equals("invokeMethod")
|| method.equals("getMetaClass")
|| method.equals("setMetaClass"); // ||
// // the following methods are only present
// // for Groovy >= 1.6
// method.equals("super$1$wait") ||
// method.equals("super$1$toString") ||
// method.equals("super$1$notify") ||
// method.equals("super$1$notifyAll") ||
// method.equals("super$1$getClass") ||
// method.equals("super$1$equals") ||
// method.equals("super$1$clone") ||
// method.equals("super$1$hashCode") ||
// method.equals("super$1$finalize");
// For Groovy >= 1.6 private methods have $ sign in their
// name, e.g.,
// private doSomething()
// will be changed to
// this$2$doSomething()
// which is unfortunately accessible and thus will be
// visualized by vrl.
// To prevent groovys strange behavior
// methods with $ sign are ignored and treated as private.
boolean isPrivateGroovyMethod = method.contains("$");
// TODO improve that code!
if ((isGroovyObject && isGroovyMethod) || isPrivateGroovyMethod) {
continue;
}
Class[] parameterTypes = theMethods[i].getParameterTypes();
Annotation[][] allParameterAnnotations = theMethods[i].getParameterAnnotations();
ArrayList<String> paramNames = new ArrayList<String>();
ArrayList<ParamInfo> paramAnnotations = new ArrayList<ParamInfo>();
ArrayList<ParamGroupInfo> paramGroupAnnotations = new ArrayList<ParamGroupInfo>();
// retrieving annotation information for each parameter
for (int j = 0; j < allParameterAnnotations.length; j++) {
Annotation[] annotations = allParameterAnnotations[j];
// add name element and set it to null
// because we don't know if parameter j is annotated
paramNames.add(null);
paramAnnotations.add(null);
paramGroupAnnotations.add(null);
// check all annotations of parameter j
// if we have a ParamInfo annotation retrieve data
// and store it as element of paramName
for (Annotation a : annotations) {
if (a.annotationType().equals(ParamInfo.class)) {
ParamInfo n = (ParamInfo) a;
if (!n.name().equals("")) {
paramNames.set(j, n.name());
}
paramAnnotations.set(j, n);
} else {
if (a.annotationType().equals(ParamGroupInfo.class)) {
ParamGroupInfo n = (ParamGroupInfo) a;
paramGroupAnnotations.set(j, n);
}
}
} // end for a
} // end for j
// convert list to array
String[] parameterNames = paramNames.toArray(new String[paramNames.size()]);
ParamInfo[] parameterAnnotations =
paramAnnotations.toArray(new ParamInfo[paramAnnotations.size()]);
ParamGroupInfo[] parameterGroupAnnotations =
paramGroupAnnotations.toArray(new ParamGroupInfo[paramGroupAnnotations.size()]);
Class returnType = theMethods[i].getReturnType();
String methodString = theMethods[i].getName();
String methodTitle = "";
String returnValueName = null;
int modifiers = theMethods[i].getModifiers();
String modifierString = Modifier.toString(modifiers);
// Method Annotations
Annotation[] annotations = theMethods[i].getAnnotations();
MethodInfo methodInfo = null;
OutputInfo outputInfo = null;
boolean interactive = true;
boolean hide = false;
for (Annotation a : annotations) {
if (a.annotationType().equals(MethodInfo.class)) {
MethodInfo n = (MethodInfo) a;
methodTitle = n.name();
interactive = n.interactive();
hide = n.hide();
returnValueName = n.valueName();
methodInfo = n;
}
if (a.annotationType().equals(OutputInfo.class)) {
outputInfo = (OutputInfo) a;
}
}
if (theMethods[i].getAnnotation(ReferenceMethodInfo.class) != null) {
hasCustomReferenceMethod = true;
MethodDescription customReferenceMethod =
new MethodDescription(
objID,
0,
methodString,
methodTitle,
null,
parameterTypes,
parameterNames,
parameterAnnotations,
parameterGroupAnnotations,
returnType,
returnValueName,
interactive,
methodInfo,
outputInfo);
if (customReferenceMethod.getParameterTypes() == null
|| customReferenceMethod.getParameterTypes().length != 1) {
throw new IllegalArgumentException(
" Cannot to use "
+ "\""
+ methodString
+ "\" as reference method"
+ " because the number of parameters does not"
+ " match. Exactly one parameter must be"
+ " provided.");
}
if (customReferenceMethod.getReturnType() == void.class
|| customReferenceMethod.getReturnType().isPrimitive()) {
throw new IllegalArgumentException(
" Cannot to use "
+ "\""
+ methodString
+ "\" as reference method"
+ " because it does not return an object."
+ " Returning primitives or void is not"
+ " allowed.");
}
customReferenceMethod.setMethodType(MethodType.CUSTOM_REFERENCE);
result.addMethod(customReferenceMethod);
} //
// TODO: at the moment method id is always 0 and will only be
// set from corresponding method representations
//
// is it necessary to change that?
else if (modifierString.contains("public")
&& (methodInfo == null || !methodInfo.ignore())) {
result.addMethod(
new MethodDescription(
objID,
0,
methodString,
methodTitle,
null,
parameterTypes,
parameterNames,
parameterAnnotations,
parameterGroupAnnotations,
returnType,
returnValueName,
interactive,
methodInfo,
outputInfo));
}
} // end for i
// Object name
if (objectInfo != null && !objectInfo.name().equals("")) {
result.setName(objectInfo.name());
}
} // end else if (o instanceof ProxyObject)
if (!hasCustomReferenceMethod) {
result.addMethod(MethodDescription.createReferenceMethod(objID, o.getClass()));
}
return result;
}
/**
* 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)
}
