Populate af:treeTable programatically using POJO in Oracle ADF (11g & 12c)

Hello All
This post is about creating & populating af:treeTable programmatically in ADF 11g and 12c
treeTable is basically a hierarchical representation of data, using ADF model layer we can create treeTable very easily by defining master-detail relation between viewObjects
see my previous posts on treeTable-
Tree Table Component in Oracle ADF(Hierarchical Representation)
Tree Table Component with declarative presentation in ADF, Access childs without custom selection listener
Expand and Collapse an af:treeTable programmatically in ADF Faces (Oracle ADF)
Refreshing Child Nodes of an af:treeTable / af:tree in Oracle ADF



to populate treeTable programmatically we need to configure data set that fits to tree hierarchy
thanks to Chris Muir's post about programmatic creation of treeTable
http://one-size-doesnt-fit-all.blogspot.in/2007/05/back-to-programming-programmatic-adf.html

there is 4-5 simple steps to do-

• Create a fusion web application and drop a af:treeTable on page , in treeTable creation wizard select "bind later" 





• now create managed bean to populate data in treeTable, create a simple List in managed bean of type POJO class (a java class that contains attributes and their accessor  )
• so in this app i am going to Tv Serial and respective character names in treeTable, for that i have created a class that contains POJO for treeTable



import java.util.ArrayList;
import java.util.List;


public class Seasons {
    public Seasons(String name) {
        this.name = name; // To Store Header Values (Storing Seasons Name :))
        characters = new ArrayList<Seasons>(); // To Store Detail Values (Storing Season's Charatcers)
    }

    public void setCharacters(List<Seasons> empDet) {
        this.characters = empDet;
    }

    public List<Seasons> getCharacters() {
        return characters;
    }
    private String name;
    private List<Seasons> characters;


    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }
// This methods directly add characters value in list
    public void addEmp(Seasons employee) {
        characters.add(employee);
    }

}



• In this class the characters list behaves as child of seasons, so in managed bean define a top-level list (that contains both master and detail) and add values

See managed Bean Code-


import java.util.ArrayList;
import java.util.List;

import org.apache.myfaces.trinidad.model.ChildPropertyTreeModel;

public class ProgrammaticTreeTabBean {
    List<Seasons> seasonList = new ArrayList<Seasons>();

    ChildPropertyTreeModel charatcerVal;

    public ProgrammaticTreeTabBean() {
        super();
        // Creating tree for Seasons and Characters details
        // Adding Master Values (seasons)
        Seasons season1 = new Seasons("Game of Thrones");
       // Adding Detail Values (Child Node-Characters)
        Seasons character = new Seasons("Tywin Lannister");
        season1.addCharaters(character);
        character = new Seasons("Tyrion Lannister");
        season1.addCharaters(character);
        character = new Seasons("Jaime Lannister");
        season1.addCharaters(character);
        character = new Seasons("Cersie Lannister");
        season1.addCharaters(character);
        character = new Seasons("Ned Stark");
        season1.addCharaters(character);

        // Adding Master Values (seasons)
        Seasons season2 = new Seasons("Arrow");
        // Adding Detail Values (Child Node-Characters)
        character = new Seasons("Oliver Queen");
        season2.addCharaters(character);
        character = new Seasons("Moira Queen");
        season2.addCharaters(character);
        character = new Seasons("Laurel Lance");
        season2.addCharaters(character);
        character = new Seasons("Sara Lance");
        season2.addCharaters(character);

        // Adding Master Values (seasons)
        Seasons season3 = new Seasons("Vikings");
      // Adding Detail Values (Child Node-Characters)
        character = new Seasons("Ragnar Lothrak");
        season3.addCharaters(character);

        // Adding all list to topList
        seasonList.add(season1);
        seasonList.add(season2);
        seasonList.add(season3);
        // Filtering Child Data, ChildPropertyTreeModel creates a TreeModel from a List of beans, see
        // https://myfaces.apache.org/trinidad/trinidad-api/apidocs/org/apache/myfaces/trinidad/model/ChildPropertyTreeModel.html
        charatcerVal = new ChildPropertyTreeModel(seasonList, "characters");
    }

    public ChildPropertyTreeModel getCharatcerVal() {
        return charatcerVal;
    }
}



• Now code part is complete, now configure your treeTable to show data, see XML source of af:treeTable



<af:treeTable rowBandingInterval="0" id="tt1"
                              value="#{pageFlowScope.ProgrammaticTreeTabBean.charatcerVal}" var="node"
                              rowSelection="single" initiallyExpanded="true">
                    <f:facet name="nodeStamp">
                        <af:column headerText="Node Stamp" id="c1" width="250">
                            <af:outputText value="#{node.name}" id="ot1" inlineStyle="font-weight:bold;"/>
                        </af:column>
                    </f:facet>
                </af:treeTable>



• Now run your application and check , what you have done ;)

Happy Learning :) Sample ADF Application (12.1.3)