I am trying to use Reflection on the server side only of a GWT app. I have a basic example working in a non-GWT example which can be seen below.
package com.xyz.reflection;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public class EntryPoint {
/**
* @param args
*/
public static void main(String[] args) {
ClassLoader dynClassLoader = ClassLoader.getSystemClassLoader();
Class<?> dynClass = null;
try {
dynClass = dynClassLoader.loadClass("com.xyz.reflection.RunMe");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
Object dynInstance = null;
try {
dynInstance = dynClass.newInstance();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
Method dynMethod = null;
try {
try {
dynMethod = dynInstance.getClass().getMethod("returnSid",
new Class[] { PassMe.class });
} catch (SecurityException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
String returnValue = (String) dynMethod.invoke(dynInstance,
new Object[] { new PassMe() });
System.out.println("Return Value: " + returnValue.toString());
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}
using the aptly named:
package com.xyz.reflection;
public class PassMe {
private String sid = "DEFAULT_SID";
public PassMe() {
this.sid = "INITIATED_SID";
}
public String getSid() {
return sid;
}
public void setSid(String sid) {
this.sid = sid;
}
}
and:
package com.xyz.reflection;
public class RunMe {
public String returnSid(PassMe s) {
return s.getSid();
}
}
This runs fine. When I try running this from a GWT server side class it doesn't work, and instead returns
java.lang.NoSuchMethodException: com.xyz.reflection.RunMe.returnSid(com.xyz.reflection.PassMe)
If I change the parameter to a String (instead of the 'PassMe' class) it works fine. Why does it not like passing my 'PassMe' class? I thought it might be an issue with serialization despite being 100% server code, but I haven't had any luck with this either.
Thanks in advance for any help anyone can give me with this.