Dynamic number of columns in the table

Hello

I use JDev 10.1.3.3.0 with ADF. I just want to create a table, with a dynamic number of columns in the table. The background is that a user of my webapplication can create and submit a sql query. Now, I have to show him the results. My idea was, I have save the result in a bean managed (ResultTable), which is stored in the session context and map at my table in my page.

If I search the Forum and don't get only one useful thread: {: identifier of the thread = 971888}, but I don't exactly understand. What is the CollectionModel? Do I need this?

I'm trying to report on the following:

ResultTable
public class ResultTable {

    public static final String SESSION_NAME = "ResultTable";
    private ArrayList<ResultColumn> columnList; 
    private CollectionModel collectionModel;

    public ResultTable() {
    }

    public ArrayList<ResultColumn> getColumnList() {
        return columnList;
    }

    public void setColumnList(ArrayList<ResultColumn> columnList) {
        this.columnList = columnList;
    }
}
ResultColumn
public class ResultColumn {
    
    private ArrayList<ResultRow> rowList;
    private String name;

    public ResultColumn() {
    }

    public ArrayList<ResultRow> getRowList() {
        return rowList;
    }

    public void setRowList(ArrayList<ResultRow> rowList) {
        this.rowList = rowList;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}
ResultTable
public class ResultRow {
    
    private String value;

    public ResultRow() {
    }

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }
}
My showResult.jspx
<af:table emptyText="No items were found"
          value="ResultTable.columnList"
          var="column"
          varStatus="colStatus"
          id="table1">
  <af:forEach items="#{column.rowList}" var="row" varStatus="rowStatus">
    <af:column sortable="false" headerText="#{column.name}" 
               id="column#{colStatus.index}">
      <af:outputText value="#{row.value}"
                     id="outputText#{rowStatus.index}"/>
    </af:column>
  </af:forEach>
</af:table>
The ResultTable was filled with data, but the Board is not filled. So, I think, it must be rejected to the data binding.

I get warnings and errors to run too. But I don't know if they are the result or cause of my problem.
27.10.2009 10:15:41 oracle.adfinternal.view.faces.renderkit.core.xhtml.TableRenderer renderTableWithoutColumns
WARNUNG: Table with id: form1:table1 has no visible columns!
27.10.2009 10:15:41 oracle.adfinternal.view.faces.io.HtmlResponseWriter endElement
SCHWERWIEGEND: Element End name:span does not match start name:div
27.10.2009 10:15:41 oracle.adfinternal.view.faces.io.HtmlResponseWriter endElement
SCHWERWIEGEND: Element End name:span does not match start name:div
27.10.2009 10:15:41 oracle.adfinternal.view.faces.io.HtmlResponseWriter endElement
SCHWERWIEGEND: Element End name:form does not match start name:span
27.10.2009 10:15:41 oracle.adfinternal.view.faces.io.HtmlResponseWriter endElement
SCHWERWIEGEND: Element End name:body does not match start name:form
27.10.2009 10:15:41 oracle.adfinternal.view.faces.io.HtmlResponseWriter endElement
SCHWERWIEGEND: Element End name:html does not match start name:body
Concerning

Majo

Hi Mario,.

Note that your JSPX snippet above has serious shortcomings:

  • 'ResultTable.rowList' is not an EL expression, but the value attribute of the af: table must refer to an EL expression
  • Items AF:foreach = "#{row.cellList}"-you don't have to store information about the columns of all rows, more it won't work as af:forEach tag may not see the value of the expression of EL #{line} (or any component EL expression created). " See the tagdoc here: http://www.oracle.com/technology/products/jdev/htdocs/partners/addins/exchange/jsf/doc/tagdoc/core/forEach.html
  • "ID =" Column #{cellStatus.index} "and id =" outputText #{rowStatus.index} "are invalid and that they don't compile even as id attributes cannot contain EL expressions.

    .

    I think to solve your problem, you need three things:

  • List of columns (for example the list If you need to store only the names of column or list If you need additional information),.
  • list of lines,
  • a line can be a map (with the name of the column - cell data mapping; card e.g.) or a list (with columns indexed; for examplelist).

    Example with the lines of the map:

    JSPX snippet:

    The ResultTable bean:

    public class ResultTable {

    private List columnList;
    private List> rowList; 

    public ResultTable() {
    }

    public List getColumnList() {
        return columnList;
    }

    public void setColumnList(List columnList) {
        this.columnList = columnList;
    }

    public List> getRowList() {
        return rowList;
    }

    public void setColumnList(List> rowList) {
        this.rowList= rowList;
    }

}

    Type ResultColumn:

    public class ResultColumn {

    // additional fields if needed...
    private String name;

    public ResultColumn() {
    }

    public String getName() {
        return name;
    }

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

    AF:table display correctly after the initialization of the values in your beans properly filled ResultTalbe (e.g. to fill the list of rank with the lines).

    Hope this helps,
    Patrik

    • Tags: Java

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