Enhance sample to show method authorization.

samples/tutorial/src/main/java/bigbank/BankDaoStub.java

@@ -0,0 +1,32 @@
+package bigbank;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class BankDaoStub implements BankDao {
+	private long id = 0;
+	private Map accounts = new HashMap();
+	
+	public void createOrUpdateAccount(Account account) {
+		if (account.getId() == -1) {
+			id++;
+			account.setId(id);
+		}
+		accounts.put(new Long(account.getId()), account);
+		System.out.println("SAVE: " + account);
+	}
+
+	public Account[] findAccounts() {
+		Account[] a = (Account[]) accounts.values().toArray(new Account[] {});
+		System.out.println("Returning " + a.length + " account(s):");
+		for (int i = 0; i < a.length; i++) {
+			System.out.println(" > " + a[i]);
+		}
+		return a;
+	}
+
+	public Account readAccount(Long id) {
+		return (Account) accounts.get(id);
+	}
+
+}