// Add provider 1
Provider p1 = new MyProvider("name1","1","");
Security.addProvider(p1);
// Add provider 2
Provider p2 = new MyProvider("name2","1","");
Security.addProvider(p2);
// List all providers
System.out.println("// List all providers");
Provider[] provs = Security.getProviders(); for (int i=0; i<provs.length; i++)
System.out.println(provs[i].toString());
// Remove one provider and list all remaining providers
System.out.println("");
System.out.println("// Remove one provider");
Security.removeProvider("name1");
provs = Security.getProviders(); for (int i=0; i<provs.length; i++)
System.out.println(provs[i].toString());
// Iterate over the entrySet
System.out.println("");
System.out.println("// Iterate over entrySet");
Map.Entry me = null;
Set es = p1.entrySet();
Iterator i = es.iterator(); while (i.hasNext()) {
me = (Map.Entry)i.next();
System.out.println("Key: " + (String)me.getKey());
System.out.println("Value: " + (String)me.getValue());
} // Try to modify the backing Map, and catch the expected exception try {
me.setValue("name1.mac"); thrownew Exception("Expected exception not thrown");
} catch (UnsupportedOperationException uoe) {
System.out.println("Expected exception caught");
}
// Iterate over the keySet, and try to remove one (should fail)
System.out.println("");
System.out.println("// Iterate over keySet");
Object o = null;
Set ks = p1.keySet();
i = ks.iterator(); while (i.hasNext()) {
o = i.next();
System.out.println((String)o);
} try {
ks.remove(o); thrownew Exception("Expected exception not thrown");
} catch (UnsupportedOperationException uoe) {
}
// Iterate over the map values
System.out.println("");
System.out.println("// Iterate over values");
Collection c = p1.values();
i = c.iterator(); while (i.hasNext()) {
System.out.println((String)i.next());
}
// Modify provider and make sure changes are reflected in // existing entrySet (i.e., make sure entrySet is "live"). // First, add entry to provider.
System.out.println("");
System.out.println("// Add 'Cipher' entry to provider");
p1.put("Cipher", "name1.des"); // entrySet
i = es.iterator(); boolean found = false; while (i.hasNext()) {
me = (Map.Entry)i.next();
System.out.println("Key: " + (String)me.getKey());
System.out.println("Value: " + (String)me.getValue()); if (((String)me.getKey()).equals("Cipher"))
found = true;
} if (!found) thrownew Exception("EntrySet not live"); // keySet
i = ks.iterator(); while (i.hasNext()) {
o = i.next();
System.out.println((String)o);
} // collection
i = c.iterator(); while (i.hasNext()) {
System.out.println((String)i.next());
}
// Remove entry from provider
System.out.println("");
System.out.println("// Remove 'Digest' entry from provider");
p1.remove("Digest"); // entrySet
i = es.iterator(); while (i.hasNext()) {
me = (Map.Entry)i.next();
System.out.println("Key: " + (String)me.getKey());
System.out.println("Value: " + (String)me.getValue());
} // keySet
i = ks.iterator(); while (i.hasNext()) {
o = i.next();
System.out.println((String)o);
} // collection
i = c.iterator(); while (i.hasNext()) {
System.out.println((String)i.next());
}
// Retrieve new entrySet and make sure the backing Map cannot be // mofified
es = p1.entrySet();
i = es.iterator(); while (i.hasNext()) {
me = (Map.Entry)i.next();
System.out.println("Key: " + (String)me.getKey());
System.out.println("Value: " + (String)me.getValue());
} try {
me.setValue("name1.mac"); thrownew Exception("Expected exception not thrown");
} catch (UnsupportedOperationException uoe) {
System.out.println("Expected exception caught");
}
}
}
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