Examples of java.security.Permission.implies()

java.security.Permission.implies()
Checks if the specified permission's actions are "implied by" this object's actions.
This must be implemented by subclasses of Permission, as they are the only ones that can impose semantics on a Permission object.
The implies method is used by the AccessController to determine whether or not a requested permission is implied by another permission that is known to be valid in the current execution context. @param permission the permission to check against. @return true if the specified permission is implied by this object,false if not.

    {
        boolean isImplied = false;
        for(int p = 0; p < permissions.size(); p ++)
        {
            Permission perm = (Permission) permissions.get(p);
            isImplied |= perm.implies(np);
            if( isImplied == true )
                break;
        }
        return isImplied;
    }

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        // The argument is an instanceof WebResourcePermission 
        Permission pA = new WebResourcePermission("/foo", "");
        Permission pB = new WebUserDataPermission("/foo", "");
        
        assertFalse(pA.implies(pB));
        assertFalse(pB.implies(pA));
    
        pA = new WebResourcePermission("/foo", "");
        pB = new WebResourcePermission("/foo", "GET,POST");
        
        assertTrue(pA.implies(pB));

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        pA = new WebResourcePermission("/foo", "");
        pB = new WebResourcePermission("/foo", "GET,POST");
        
        assertTrue(pA.implies(pB));
        assertFalse(pB.implies(pA));
        
        pA = new WebResourcePermission("/foo/*:/foo/bar", "");
        pB = new WebResourcePermission("/foo/bar", "");
        
        assertFalse(pA.implies(pB));

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        pA = new WebResourcePermission("/foo/*:/foo/bar", "");
        pB = new WebResourcePermission("/foo/bar", "");
        
        assertFalse(pA.implies(pB));
        assertFalse(pB.implies(pA));


        pA = new WebResourcePermission("/foo/bar/*:/foo/bar/cat/dog", "");
        pB = new WebResourcePermission("/foo/bar/*:/foo/bar/cat/*", "");


        assertTrue(pA.implies(pB));

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        pA = new WebResourcePermission("/foo/bar/*:/foo/bar/cat/dog", "");
        pB = new WebResourcePermission("/foo/bar/*:/foo/bar/cat/*", "");


        assertTrue(pA.implies(pB));
        assertFalse(pB.implies(pA));


        pA = new WebResourcePermission("/:/a.jsp:/b.jsp:/c.jsp", "GET,POST,PUT,DELETE,HEAD,OPTIONS,TRACE");
        pB = new WebResourcePermission("/:/a.jsp:/c.jsp:/b.jsp", (String) null);


        assertTrue(pA.implies(pB));

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        pA = new WebResourcePermission("/:/a.jsp:/b.jsp:/c.jsp", "GET,POST,PUT,DELETE,HEAD,OPTIONS,TRACE");
        pB = new WebResourcePermission("/:/a.jsp:/c.jsp:/b.jsp", (String) null);


        assertTrue(pA.implies(pB));
        assertTrue(pB.implies(pA));
    }


    /*
     * Testing WebResourcePermission(String, String[])
     */

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  Permission p2 = eop(n2);
  v(p1.equals(p2));
  v(p2.equals(p1));
  v(p1.hashCode() == p2.hashCode());
  v(p1.implies(p2));
  v(p2.implies(p1));
    }


    /**
     * Check that the two permissions are not equal and that p1 implies p2.
     */

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     */
    public static void implies(String n1, String n2) {
  Permission p1 = eop(n1);
  Permission p2 = eop(n2);
  v(p1.implies(p2));
  v(!p2.implies(p1));
  v(!p1.equals(p2));
  v(!p2.equals(p1));
    }


    /**

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  Permission p1 = eop(n1);
  Permission p2 = eop(n2);
  v(!p1.equals(p2));
  v(!p2.equals(p1));
  v(!p1.implies(p2));
  v(!p2.implies(p1));
    }


    public static void main(String[] args) throws Exception {
  if (System.getSecurityManager() == null) {
      System.setSecurityManager(new SecurityManager());

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                        x = perms.get(path);
                }


                if (x != null) {
                        // we have a direct hit!
                        return x.implies(permission);
                }


                // work our way up the tree...
                int last, offset;

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