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.

    
        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));
    }


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

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   */
  public boolean implies(Permission p) {
    Iterator<Permission> i = perms.iterator();
    while (i.hasNext()) {
      Permission p1 = ((Permission) i.next());
      if (p.getClass().isAssignableFrom(p1.getClass()) && p1.implies(p)) {
        return true;
      }
    }
    return false;
  }

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    public static void main(String[]args) throws Exception {


      Permission p1 = new A("foo");
      Permission p2 = new B("foo");


      if (p1.implies(p2) || p2.implies(p1) || p1.equals(p2)) {
          throw new Exception("Test failed");
      }


      // make sure permissions imply and equal themselves
      if (! (p1.implies(p1) && p1.equals(p1))) {

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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));
    }


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

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                    }
                    else
                    {
                        // Implies logic, the one with one permission
                        // is implied by the other but not vice-versa.
                        assertTrue(p.implies(base));
                        assertFalse(base.implies(p));
                        
                        // Names in canonical form
                        int f;
                        int s;

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