Application error while using security.policy feature

Question

I am learning Java by reading http://java.sun.com/docs/books/tutorial/
While studying the "Security/Quick Tour of Controlling Applications" part I compile GetProps.java example:
import java.lang.*;
import java.security.*;
class GetProps {
public static void main(String[] args) {
String s;
try {
System.out.println("About to get os.name property value");
s = System.getProperty("os.name", "not specified");
System.out.println(" The name of your operating system is: " + s);
System.out.println("About to get java.version property value");
s = System.getProperty("java.version", "not specified");
System.out.println(" The version of the JVM you are running is: " + s);
System.out.println("About to get user.home property value");
s = System.getProperty("user.home", "not specified");
System.out.println(" Your user home directory is: " + s);
System.out.println("About to get java.home property value");
s = System.getProperty("java.home", "not specified");
System.out.println(" Your JRE installation directory is: " + s);
} catch (Exception e) {
System.err.println("Caught exception " + e.toString());
When I run it without security manger it prints all the property as it has to:
E:\Test>java -jar GetProps.jar
About to get os.name property value
The name of your operating system is: Windows XP
About to get java.version property value
The version of the JVM you are running is: 1.6.0_03
About to get user.home property value
Your user home directory is: C:\Documents and Settings\mikhail
About to get java.home property value
Your JRE installation directory is: C:\Program Files\Java\jdk1.6.0_03\jre
When I run it with security manager it prints the first two properties only and throws AccessControlException on user.home property as it has to either:
E:\Test>java -Djava.security.manager -jar GetProps.jar
About to get os.name property value
The name of your operating system is: Windows XP
About to get java.version property value
The version of the JVM you are running is: 1.6.0_03
About to get user.home property value
Caught exception java.security.AccessControlException: access denied (java.util.PropertyPermission user.home read)
But when I run it with security manager and security policy allowing access to user.home and java.home properties it nevertheless throws AccessControlException, in spite of that mypolicy file grants access to these properties:
E:\Test>java -Djava.security.manager -Djava.security.policy=mypolicy -jar GetProps.jar
About to get os.name property value
The name of your operating system is: Windows XP
About to get java.version property value
The version of the JVM you are running is: 1.6.0_03
About to get user.home property value
Caught exception java.security.AccessControlException: access denied (java.util.PropertyPermission user.home read)
Here is content of mypolicy file which I created by using policytool utility:
grant codeBase "file:/E:/Test/" {
permission java.util.PropertyPermission "java.home", "read";
permission java.util.PropertyPermission "user.home", "read";
My system:
MS WindowsXP Professional, Servis Pack 2
Sun SE JDK 1.6.0_03
What am I doing wrong?
Thank you, Mikhail.

Answer 1

The last two days have been frustrating. The error above also appeared when I was trying to view one of the relationships in one of my entities.
What seems to have been happening is Designer showed a relationship existing after it had been deleted. This seems to be a bug in Designer. These rouge links can be deleted in the RON (although if you try to look at their details the RON will crash with the error in original query). After this cleanup everything worked like clockwork.
Hannah Fraser