TreeTable based on one simple VO. Is this possible?

Question

Hello,
consider, as an example, a single read-only VO based on a query on a number of different tables, which gives a result similar to:
ID | PARENT_ID
1  | null
2  | 1
3  | 2
4  | null
5  | 4
6  | 5The table above represents the following tree:
1
|_2
  |_3
4
|_5
  |_6Is there a concrete and fast way to represent the tree above with an af:treeTable component starting from the given SQL query (without requiring to extend it with Java code).
To be precise the treeTable above will have two rows when totally collapsed (marked with "1" and "4"). For example, once "1" is expanded, it will show a "2" as sub-row, and so on...
I would appreciate concrete solutions, maybe based on the above set of records.
Thanks.

Answer 1

Plase help.
I have followed all the instructions carefully twice, but there still some problems expanding the second level.
I obtain an exception that I will show you later.
First of all let me give you all the steps I have done in my simple project.
At the end of the thread I will also give you all the necessary data from my simple project, so that you can reply by yourself with simple copy and paste.
1. I made a Read-Only VO based on this simple query (the real query will take its data from complex tables):
select MyID, PARENT_ID from TREETREE is actually a table on a database containing the following data, returned by the query above:
MyID | PARENT_ID
1      null
2      1
3      2
4      null
5      4
6      4
7      5As you can see, there are two root nodes, "1" and "4". Under the first one there is node "2". Under the second root there are nodes "5" and "6". Leafs are "3" and "7".
2. I made a ViewLink on the above TreeVO. This ViewLink has caridanlity 1..*. Where Source is MyId and Destination is "Parent_ID".
3. I inserted an istance of the TreeVO in the Data Model of the application module. Then, by using the ViewLink above, I added a second instance of the TreeVO as child of the first instance. This is basically a two-level Master-Deatil relationship. According to your instructions, it's enough to represent a three-level tree table.
4. I added a ViewCriteria to the TreeVO and applied to the Master instance of TreeVO in the data model, so that "ParentID is null" will make the tree only show the root nodes "1" and "4" as top-level nodes.
5. I dragged and dropped the Master to the page and chose af:treetable component to represent the hierarchical data as a tree. I added an accessor Rule to the binding based on the ViewLink.
6. I run the page.
The result is that the tree component on the page shows the first two levels. Whenever I try to expand the second level I get an excpetion:
java.lang.IllegalStateException: ADFv: non allinterno di un contenitore.
     at oracle.adfinternal.view.faces.model.binding.FacesCtrlHierBinding$FacesModel.exitContainer(FacesCtrlHierBinding.java:870)
     at oracle.adfinternal.view.faces.model.FlattenedTreeCollectionModel.getRowIndex(FlattenedTreeCollectionModel.java:111)
     at oracle.adfinternal.view.faces.renderkit.rich.TreeRendererUtils$1.getRowIndex(TreeRendererUtils.java:750)
     at oracle.adfinternal.view.faces.renderkit.rich.TreeTableRenderer._renderChildNodesForExpandedNode(TreeTableRenderer.java:568)
     at oracle.adfinternal.view.faces.renderkit.rich.TreeTableRenderer.handleExpand(TreeTableRenderer.java:515)
     at oracle.adfinternal.view.faces.renderkit.rich.TableRenderer._handleDataFetch(TableRenderer.java:1610)
     at oracle.adfinternal.view.faces.renderkit.rich.TableRenderer.encodeAll(TableRenderer.java:560)
     at oracle.adfinternal.view.faces.renderkit.rich.TreeTableRenderer.encodeAll(TreeTableRenderer.java:638)
     at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1452)
...Below are all the xml files in the project: the TreeVO, the ViewLink, the ApplicationModule and the Page.
<?xml version="1.0" encoding="windows-1252" ?>
<!DOCTYPE ViewObject SYSTEM "jbo_03_01.dtd">
<!---->
<ViewObject
  xmlns="http://xmlns.oracle.com/bc4j"
  Name="ViewObjVO"
  Version="11.1.2.60.81"
  BindingStyle="OracleName"
  CustomQuery="true"
  RowClass="oracle.jbo.server.ViewRowImpl"
  ComponentClass="oracle.jbo.server.ViewObjectImpl"
  FetchMode="FETCH_AS_NEEDED"
  PageIterMode="Full"
  UseGlueCode="false">
  <DesignTime>
    <Attr Name="_isExpertMode" Value="true"/>
  </DesignTime>
  <Properties>
    <SchemaBasedProperties>
      <LABEL
        ResId="model.views.ViewObjVO_LABEL"/>
    </SchemaBasedProperties>
  </Properties>
  <SQLQuery><![CDATA[select MYID, PARENT_ID from TREE]]></SQLQuery>
  <ViewAttribute
    Name="Myid"
    IsUpdateable="false"
    IsPersistent="false"
    PrecisionRule="true"
    Precision="255"
    Type="java.lang.String"
    ColumnType="VARCHAR2"
    AliasName="MYID"
    Expression="MYID"
    SQLType="VARCHAR">
    <DesignTime>
      <Attr Name="_DisplaySize" Value="100"/>
    </DesignTime>
  </ViewAttribute>
  <ViewAttribute
    Name="ParentId"
    IsUpdateable="false"
    IsPersistent="false"
    PrecisionRule="true"
    Precision="100"
    Type="java.lang.String"
    ColumnType="VARCHAR2"
    AliasName="PARENT_ID"
    Expression="PARENT_ID"
    SQLType="VARCHAR">
    <DesignTime>
      <Attr Name="_DisplaySize" Value="100"/>
    </DesignTime>
  </ViewAttribute>
  <ViewCriteria
    Name="ViewObjVOCriteria"
    ViewObjectName="model.views.ViewObjVO"
    Conjunction="AND">
    <Properties>
      <CustomProperties>
        <Property
          Name="displayOperators"
          Value="InAdvancedMode"/>
        <Property
          Name="autoExecute"
          Value="false"/>
        <Property
          Name="allowConjunctionOverride"
          Value="true"/>
        <Property
          Name="showInList"
          Value="true"/>
        <Property
          Name="mode"
          Value="Basic"/>
      </CustomProperties>
    </Properties>
    <ViewCriteria
      Name="ViewObjVOSubCriteria1"
      ViewObjectName="model.views.ViewObjVO"
      Conjunction="AND">
      <ViewCriteriaRow
        Name="ViewObjVOSubCriteria1_row_0"
        UpperColumns="1">
        <ViewCriteriaItem
          Name="ParentId"
          ViewAttribute="ParentId"
          Operator="ISBLANK"
          Conjunction="AND"
          Required="Optional"/>
      </ViewCriteriaRow>
    </ViewCriteria>
  </ViewCriteria>
  <ViewLinkAccessor
    Name="MyidViewObj"
    ViewLink="model.links.ViewLink"
    Type="oracle.jbo.RowIterator"
    IsUpdateable="false"/>
  <ResourceBundle>
    <PropertiesBundle
      PropertiesFile="model.ModelBundle"/>
  </ResourceBundle>
</ViewObject>
<?xml version="1.0" encoding="windows-1252" ?>
<!DOCTYPE ViewLink SYSTEM "jbo_03_01.dtd">
<!---->
<ViewLink
  xmlns="http://xmlns.oracle.com/bc4j"
  Name="ViewLink"
  Version="11.1.2.60.81">
  <Properties>
    <SchemaBasedProperties>
      <LABEL
        ResId="model.links.ViewLink_LABEL"/>
    </SchemaBasedProperties>
  </Properties>
  <ViewLinkDefEnd
    Name="ParentIdViewObj"
    Cardinality="1"
    Source="true"
    Owner="model.views.ViewObjVO">
    <DesignTime>
      <Attr Name="_finderName" Value="ParentIdViewObj"/>
      <Attr Name="_isUpdateable" Value="true"/>
    </DesignTime>
    <AttrArray Name="Attributes">
      <Item Value="model.views.ViewObjVO.Myid"/>
    </AttrArray>
  </ViewLinkDefEnd>
  <ViewLinkDefEnd
    Name="MyidViewObj"
    Cardinality="-1"
    Owner="model.views.ViewObjVO">
    <DesignTime>
      <Attr Name="_finderName" Value="MyidViewObj"/>
      <Attr Name="_isUpdateable" Value="true"/>
    </DesignTime>
    <AttrArray Name="Attributes">
      <Item Value="model.views.ViewObjVO.ParentId"/>
    </AttrArray>
  </ViewLinkDefEnd>
  <ResourceBundle>
    <PropertiesBundle
      PropertiesFile="model.ModelBundle"/>
  </ResourceBundle>
</ViewLink>
<?xml version="1.0" encoding="windows-1252" ?>
<!DOCTYPE AppModule SYSTEM "jbo_03_01.dtd">
<!---->
<AppModule
  xmlns="http://xmlns.oracle.com/bc4j"
  Name="AppModuleS3AMRet"
  Version="11.1.2.60.81"
  ComponentClass="oracle.jbo.server.ApplicationModuleImpl"
  ClearCacheOnRollback="true">
  <ViewUsage
    Name="ViewObj1"
    ViewObjectName="model.views.ViewObjVO">
    <ViewCriteriaUsage
      Name="ViewObjVOCriteria"
      FullName="model.views.ViewObjVO.ViewObjVOCriteria"/>
  </ViewUsage>
  <ViewUsage
    Name="ViewObj2"
    ViewObjectName="model.views.ViewObjVO"/>
  <ViewLinkUsage
    Name="ViewLink1"
    ViewLinkObjectName="model.links.ViewLink"
    SrcViewUsageName="model.views.AppModuleS3AMRet.ViewObj1"
    DstViewUsageName="model.views.AppModuleS3AMRet.ViewObj2"
    Reversed="false"/>
</AppModule>
<?xml version="1.0" encoding="UTF-8" ?>
<pageDefinition xmlns="http://xmlns.oracle.com/adfm/uimodel" version="11.1.2.60.81" id="untitled1PageDef"
                Package="model.pageDefs">
  <parameters/>
  <executables>
    <variableIterator id="variables"/>
    <iterator Binds="ViewObj1" RangeSize="25" DataControl="AppModuleS3AMRetDataControl1" id="ViewObj1Iterator"/>
  </executables>
  <bindings>
    <tree IterBinding="ViewObj1Iterator" id="ViewObj1">
      <nodeDefinition DefName="model.views.ViewObjVO" Name="ViewObj10">
        <AttrNames>
          <Item Value="Myid"/>
        </AttrNames>
        <Accessors>
          <Item Value="MyidViewObj"/>
        </Accessors>
      </nodeDefinition>
    </tree>
  </bindings>
</pageDefinition>
<?xml version='1.0' encoding='windows-1252'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1" xmlns:f="http://java.sun.com/jsf/core"
          xmlns:h="http://java.sun.com/jsf/html" xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
    <jsp:directive.page contentType="text/html;charset=UTF-8"/>
    <f:view>
        <af:document title="untitled1.jspx" id="d1">
            <af:messages id="m1"/>
            <af:form id="f1">
                <af:panelStretchLayout id="psl1">
                    <f:facet name="center">
                        <!-- id="af_one_column_stretched"   -->
                        <af:treeTable value="#{bindings.ViewObj1.treeModel}" var="node"
                                      selectionListener="#{bindings.ViewObj1.treeModel.makeCurrent}"
                                      rowSelection="single" id="tt1">
                            <f:facet name="nodeStamp">
                                <af:column id="c1">
                                    <af:outputText value="#{node}" id="ot1"/>
                                </af:column>
                            </f:facet>
                            <f:facet name="pathStamp">
                                <af:outputText value="#{node}" id="ot2"/>
                            </f:facet>
                        </af:treeTable>
                    </f:facet>
                </af:panelStretchLayout>
            </af:form>
        </af:document>
    </f:view>
</jsp:root>Edited by: user10047839 on 12-gen-2012 5.13
Edited by: user10047839 on 12-gen-2012 5.18