31天重构指南之二十九：去除中间人对象
今天要说的重构来自于Folwers的重构目录，你可以在这里查看。
有时在你的代码会存在一些幽灵类，Fowler称它们为“中间人”，中间人类除了调用别的对象之外不做任何事情，所以中间人类没有存在的必要，我们可以将它们从代码中删除。
1: public class Consumer
2: {
3: public AccountManager AccountManager { get; set; }
4:
5: public Consumer(AccountManager accountManager)
6: {
7: AccountManager = accountManager;
8: }
9:
10: public void Get(int id)
11: {
12: Account account = AccountManager.GetAccount(id);
13: }
14: }
15:
16: public class AccountManager
17: {
18: public AccountDataProvider DataProvider { get; set; }
19:
20: public AccountManager(AccountDataProvider dataProvider)
21: {
22: DataProvider = dataProvider;
23: }
24:
25: public Account GetAccount(int id)
26: {
27: return DataProvider.GetAccount(id);
28: }
29: }
30:
31: public class AccountDataProvider
32: {
33: public Account GetAccount(int id)
34: {
35: // get account
36: }
37: }
要对上面的代码应用重构是简单明了的，我们只需要移除掉中间人对象就可以了。
1: public class Consumer
2: {
3: public AccountDataProvider AccountDataProvider { get; set; }
4:
5: public Consumer(AccountDataProvider dataProvider)
6: {
7: AccountDataProvider = dataProvider;
8: }
9:
10: public void Get(int id)
11: {
12: Account account = AccountDataProvider.GetAccount(id);
13: }
14: }
15:
16: public class AccountDataProvider
17: {
18: public Account GetAccount(int id)
19: {
20: // get account
21: }
22: }