具有搜索功能的TreeModelAdapter

Question

I'm currently working with Tapestry 5.3 now, and using a Tree Component to display hierarchy of account list which has 4 levels. But now I'm struggling with search functionality in this scenario:

Level 1-1
|_ _ _ Level 2-1 
|_ _ _ Level 2-2
       |_ _ _ Level 3-1
       |_ _ _ Level 3-2
       |      |_ _ _ Level 4-1
       |      |_ _ _ Level 4-2
       |_ _ _ Level 3-3

For example. User wants to searched account Level 4-1, the tree should displayed like this

Level 1-1
|_ _ _ Level 2-2
       |_ _ _ Level 3-2
              |_ _ _ Level 4-1

Can someone please help me this logic stuff? Thanks.

Answer 1

Finally, I've figured it out.

I created a new class AccountTreeModelAdapter which is implements TreeModelAdapter . You can override the getChildren method and put your search logic there. For me it works in this flow:

• Add setSearchedAccounts(List<Account> searchedAccounts) method in AccountTreeModelAdapter
• Set it's value from your main class
• In getChildren method, use Iterator to iterate your whole list (all accounts) and compare one by one with each Account's code in searchedAccounts list (using searchedAccounts.stream().filter() in Java 8).

Voila, now the tree will only display accounts you desire. But, how to display the parent? Until this point, the tree not showing the parent and the parent's parent and the parent's parent again and again until you reach the ROOT.

To accomplish this, I create a new column for my Account entity in database. Which is accountPath . So every time user create an account, this accountPath will work like this:

Account "ABC" (ID: 1)
    |_ _ _ "XYZ" (ID: 2)
        |_ _ _ "OPQ" (ID: 3)
            |_ _ _ "STU" (ID: 4)

Account "ABC" will has no path (since it's a ROOT). Account "XYZ" will has path -1- Account "OPQ" will has path -1-2- Account "STU" will has path -1-2-3-

To get each parent's ID, use string.split("-")

So, if you want the tree to display the parent, you can simply just add the parent account to searchedAccounts list.

That's all.