|
1 package com.db4o.f1.chapter6;
2
3 import com.db4o.*;
4 import com.db4o.f1.*;
5
6 public class TranslatorExample extends Util {
7 public static void main(String  [] args) {
8 tryStoreWithoutCallConstructors();
9 tryStoreWithCallConstructors();
10 storeWithTranslator();
11 }
12
13 public static void tryStoreWithoutCallConstructors() {
14 Db4o.configure().exceptionsOnNotStorable(false);
15 Db4o.configure().objectClass(NotStorable.class)
16 .callConstructor(false);
17 tryStoreAndRetrieve();
18 }
19
20 public static void tryStoreWithCallConstructors() {
21 Db4o.configure().exceptionsOnNotStorable(true);
22 Db4o.configure().objectClass(NotStorable.class)
23 .callConstructor(true);
24 tryStoreAndRetrieve();
25 }
26
27 public static void storeWithTranslator() {
28 Db4o.configure().objectClass(NotStorable.class)
29 .translate(new NotStorableTranslator());
30 tryStoreAndRetrieve();
31 }
32
33 public static void tryStoreAndRetrieve() {
34 ObjectContainer db=Db4o.openFile(YAPFILENAME);
35 try {
36 NotStorable notStorable = new NotStorable(42,"Test");
37 System.out.println("ORIGINAL: "+notStorable);
38 db.set(notStorable);
39 }
40 catch(Exception exc) {
41 System.out.println(exc.toString());
42 return;
43 }
44 finally {
45 db.close();
46 }
47 db=Db4o.openFile(YAPFILENAME);
48 try {
49 ObjectSet result=db.get(NotStorable.class);
50 while(result.hasNext()) {
51 NotStorable notStorable=(NotStorable)result.next();
52 System.out.println("RETRIEVED: "+notStorable);
53 db.delete(notStorable);
54 }
55 }
56 finally {
57 db.close();
58 }
59 }
60 } |
Popular Tags |
Java API By Example, From Geeks To Geeks.