public static void main(String args[]) throws Exception {
File f = new File("tmp.ser");
if (args[0].compareTo("-s") == 0) {
FileOutputStream of = new FileOutputStream(f);
ObjectOutputStream oos = new ObjectOutputStream(of);
Class cl = Class.forName(args[1]);
oos.writeObject(cl);
if (ObjectStreamClass.lookup(cl) != null) oos.writeObject(cl.newInstance());
oos.close();
System.out.println("Serialized Class " + cl.getName());
} else if (args[0].compareTo("-de") == 0) {
FileInputStream inf = new FileInputStream(f);
ObjectInputStream ois = new ObjectInputStream(inf);
Class cl = null;
try {
cl = (Class) ois.readObject();
throw new Error("Expected InvalidClassException to be thrown");
} catch (InvalidClassException e) {
System.out.println("Caught expected exception DeSerializing class " + e.getMessage());
}
ois.close();
} else if (args[0].compareTo("-doe") == 0) {
FileInputStream inf = new FileInputStream(f);
ObjectInputStream ois = new ObjectInputStream(inf);
Class cl = null;
cl = (Class) ois.readObject();
try {
ois.readObject();
throw new Error("Expected InvalidClassException to be thrown");
} catch (InvalidClassException e) {
System.out.println("Caught expected exception DeSerializing class " + e.getMessage());
}
ois.close();
} else if (args[0].compareTo("-d") == 0) {
FileInputStream inf = new FileInputStream(f);
ObjectInputStream ois = new ObjectInputStream(inf);
Class cl = (Class) ois.readObject();
try {
ois.readObject();
} catch (EOFException e) {
}
ois.close();
System.out.println("DeSerialized Class " + cl.getName());
}
}
/**
* Deserialize the contents of File with given name containing a string and return the resulting
* string. If the indicated file doesnt exist or an error occurs, null is returned. If casually is
* false, an error message is printed and an exception is raised if the file was not found or an
* error occured on loading.
*/
public static Object loadObject(String Filename, boolean casually) {
Object s = null;
File f = new File(Filename);
if (f.exists()) {
try {
s = (Object) load(new File(Filename));
} catch (InvalidClassException e) {
System.err.println(
"WARNING: loading object File "
+ Filename
+ " not possible, this may happen on source code changes.");
System.err.println(e.getMessage());
} catch (Exception e) {
throw new RuntimeException(
"WARNING: loading object File " + Filename + " not possible! (" + e.getMessage() + ")");
}
return s;
} else {
if (!casually) System.err.println("Error in Serializer: file " + Filename + " not found!");
return null;
}
}
