How to implement a dynamic list with a JSF 2.0 Composite Component?

Question

I asked this question and although the answer directly satisfied my needs I am left with a feeling that there has to a simpler solution for this specific problem.

I

Answer 1

I'd use a in a composite component with a backing UIComponent which you can bind by componentType attribute of the . In the backing UIComponent you can then maintain the DataModel and define the actions.

dynamicFieldList.xhtml

(the can if necessary be your composite field component)

com.example.DynamicFieldList

@FacesComponent(value="dynamicFieldList") // To be specified in componentType attribute.
@SuppressWarnings({"rawtypes", "unchecked"}) // We don't care about the actual model item type anyway.
public class DynamicFieldList extends UINamingContainer {

    private UIData table;

    public void add() {
        ((List) getAttributes().get("value")).add(new Field("somelabel"));
    }

    public void remove() {
        ((List) getAttributes().get("value")).remove(table.getRowData());
    }

    public UIData getTable() {
        return table;
    }

    public void setTable(UIData table) {
        this.table = table;
    }

}

Use it as follows:

with just this

@ManagedBean
@ViewScoped
public class Bean implements Serializable {

    private List fields;

    public Bean() {
        fields = new ArrayList<>();
    }

    public List getFields() {
        return fields;
    }

}

and

public class Field implements Serializable {

    private String label;
    private String value;

    public Field() {
        //
    }

    public Field(String label) {
        this.label = label;
    }

    public String getLabel() {
        return label;
    }

    public void setLabel(String label) {
        this.label = label;
    }

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }

}