Examples of javax.faces.model.DataModel

javax.faces.model.DataModel

DataModel is an abstraction around arbitrary data binding technologies that can be used to adapt a variety of data sources for use by JavaServer Faces components that support per-row processing for their child components (such as {@link UIData}.

The data collection underlying a {@link DataModel} instance ismodeled as a collection of row objects that can be accessed by a zero-relative cursor (row index). The APIs provide mechanisms to position to a specified zero-relative row index, and to retrieve an object that represents the data that corresponds to the current row index.

A concrete {@link DataModel} instance is attached to a particularcollection of underlying data by calling the setWrappedData() method. It can be detached from that underlying data collection by passing a null parameter to this method.

Concrete {@link DataModel} implementations must provide a publiczero-arguments constructor that calls setWrappedData(null). A convenience constructor that takes a wrapped object of the appropriate type (and passes it on via a call to setWrappedData(), should also be provided.

Event listeners may be registered to receive notifications of when a new row index is selected.

     * that changes its id (like a table does) then this map only ever has
     * one entry.
     */
    private DataModel getDataModel()
    {
        DataModel dataModel = null;
        String clientID = "";
        
        UIComponent parent = getParent();
        if (parent != null) {
            clientID = parent.getClientId(getFacesContext());

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    /**
     * @see org.apache.myfaces.component.html.ext.HtmlDataTableHack#createDataModel()
     */
    protected DataModel createDataModel()
    {
        DataModel dataModel = super.createDataModel();


        boolean isSortable = isSortable();


        if (!(dataModel instanceof SortableModel))
        {

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        _sortColumnIndex = values[14] != null ? ((Integer) values[14]).intValue() : -1;
    }


    public _SerializableDataModel getSerializableDataModel()
    {
        DataModel dm = getDataModel();
        if (dm instanceof _SerializableDataModel)
        {
            return (_SerializableDataModel) dm;
        }
        return createSerializableDataModel();

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            _rowStates.put(getClientId(facesContext), saveDescendantComponentStates(getChildren().iterator(), false));
        }


        _rowIndex = rowIndex;


        DataModel dataModel = getDataModel();
        dataModel.setRowIndex(rowIndex);


        String var = (String) getStateHelper().get(PropertyKeys.var);
        if (rowIndex == -1)
        {
            if (var != null)
            {
                facesContext.getExternalContext().getRequestMap().remove(var);
            }
        }
        else
        {
            if (var != null)
            {
                if (isRowAvailable())
                {
                    Object rowData = dataModel.getRowData();
                    facesContext.getExternalContext().getRequestMap().put(var, rowData);
                }
                else
                {
                    facesContext.getExternalContext().getRequestMap().remove(var);

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     * component is therefore used to cache the datamodel for each row of the table. In the normal case where this table
     * is not nested inside a component that changes its id (like a table does) then this map only ever has one entry.
     */
    protected DataModel getDataModel()
    {
        DataModel dataModel;
        String clientID = "";


        UIComponent parent = getParent();
        if (parent != null)
        {

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    /**
     * @see org.apache.myfaces.component.html.ext.HtmlDataTableHack#createDataModel()
     */
    protected DataModel createDataModel()
    {
        DataModel dataModel = super.createDataModel();


        boolean isSortable = isSortable();


        if (!(dataModel instanceof SortableModel))
        {

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        _bodyStyleClass = (String) values[35];
    }


    public _SerializableDataModel getSerializableDataModel()
    {
        DataModel dm = getDataModel();
        if (dm instanceof _SerializableDataModel)
        {
            return (_SerializableDataModel) dm;
        }
        return createSerializableDataModel();

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            _cellStates.put(getClientId(facesContext), saveDescendantComponentStates(getFacetsAndChildren()));
        }


        _colIndex = colIndex;


        DataModel dataModel = getDataModel();
        dataModel.setRowIndex(colIndex);


        String var = getVar();
        if (colIndex == -1) {
            if (var != null) {
                facesContext.getExternalContext().getRequestMap().remove(var);
            }
        } else {
            if (var != null) {
                if (isRowAvailable()) {
                    Object rowData = dataModel.getRowData();
                    facesContext.getExternalContext().getRequestMap().put(var, rowData);
                } else {
                    facesContext.getExternalContext().getRequestMap().remove(var);
                }
            }

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        String clientID = "";
        UIComponent parent = getParentUIData().getParent();
        if (parent != null) {
            clientID = parent.getClientId(getFacesContext());
        }
        DataModel dataModel = (DataModel) _dataModelMap.get(clientID);
        if (dataModel == null) {
            dataModel = createDataModel();
            _dataModelMap.put(clientID, dataModel);
        }
        return dataModel;

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                                            .iterator(), false));
        }


        _rowIndex = rowIndex;


        DataModel dataModel = getDataModel();
        dataModel.setRowIndex(rowIndex);


        String var = getVar();
        if (rowIndex == -1)
        {
            if (var != null)
            {
                facesContext.getExternalContext().getRequestMap().remove(var);
            }
        }
        else
        {
            if (var != null)
            {
                if (isRowAvailable())
                {
                    Object rowData = dataModel.getRowData();
                    facesContext.getExternalContext().getRequestMap().put(var,
                                    rowData);
                }
                else
                {

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