Ich erweitere HtmlTableRenderer Renderer Standard und überschreiben renderRowStart Methode diese Stil, indem Attribut in Tabellen-> tr Element zu erreichen, mit Wert Anzeige: keine.
Der Eintrag innerhalb der Bindungsliste muss die TableRow-Schnittstelle implementieren, die nur eine Methode von isHide hat. In der konkreten Klasse können Sie jeder beliebigen Logik einen booleschen Wert zuweisen.
BTW, in diesem benutzerdefinierten Renderer hat auch PrimeFaces Implementierung wie Funktion, die die Nachricht gibt, wenn die Tabelle leer ist und die Tabelle-> tr automatisch berechnet, wie viele Spalten in der Tabelle und geben Sie Colspan Attribut den richtigen Wert.
public class MyDataTableRenderer extends HtmlTableRenderer {
private static final Integer[] ZERO_INT_ARRAY = new Integer[] { 0 };
private static final String NO_RESULT_MESSAGE_ATTR_NAME = "noResultMessage";
private static final String defaultEmptyMessage = "No records found";
private static final Logger log = Logger.getLogger(DHSDataTableRenderer.class.getName());
@Override
public void encodeInnerHtml(FacesContext facesContext, UIComponent component) throws IOException {
UIData uiData = (UIData) component;
String message = (String) uiData.getAttributes().get(NO_RESULT_MESSAGE_ATTR_NAME);
if (message == null || "".equals(message.trim())) {
message = defaultEmptyMessage;
}
ResponseWriter writer = facesContext.getResponseWriter();
int rowCount = uiData.getRowCount();
int newspaperColumns = getNewspaperColumns(component);
int columnNumber = getChildCount(component);
if (rowCount == -1 && newspaperColumns == 1) {
encodeInnerHtmlUnknownRowCount(facesContext, component);
return;
}
if (rowCount == 0) {
// nothing to render, to get valid xhtml we render an empty dummy
// row
writer.startElement(HTML.TBODY_ELEM, uiData);
writer.writeAttribute(HTML.ID_ATTR, component.getClientId(facesContext) + ":tbody_element", null);
writer.startElement(HTML.TR_ELEM, uiData);
writer.startElement(HTML.TD_ELEM, uiData);
writer.writeAttribute(HTML.COLSPAN_ATTR, columnNumber, null);
writer.writeAttribute(HTML.CLASS_ATTR, "dhs-empty-table", null);
writer.write(message);
writer.endElement(HTML.TD_ELEM);
writer.endElement(HTML.TR_ELEM);
writer.endElement(HTML.TBODY_ELEM);
return;
}
// begin the table
// get the CSS styles
Styles styles = getStyles(uiData);
int first = uiData.getFirst();
int rows = uiData.getRows();
int last;
if (rows <= 0) {
last = rowCount;
} else {
last = first + rows;
if (last > rowCount) {
last = rowCount;
}
}
int newspaperRows;
if ((last - first) % newspaperColumns == 0) {
newspaperRows = (last - first)/newspaperColumns;
} else {
newspaperRows = ((last - first)/newspaperColumns) + 1;
}
boolean newspaperHorizontalOrientation = isNewspaperHorizontalOrientation(component);
// get the row indizes for which a new TBODY element should be created
Integer[] bodyrows = getBodyRows(facesContext, component);
int bodyrowsCount = 0;
// walk through the newspaper rows
for (int nr = 0; nr < newspaperRows; nr++) {
boolean rowStartRendered = false;
// walk through the newspaper columns
for (int nc = 0; nc < newspaperColumns; nc++) {
// the current row in the 'real' table
int currentRow;
if (newspaperHorizontalOrientation) {
currentRow = nr * newspaperColumns + nc + first;
} else {
currentRow = nc * newspaperRows + nr + first;
}
// if this row is not to be rendered
if (currentRow >= last) {
continue;
}
// bail if any row does not exist
uiData.setRowIndex(currentRow);
if (!uiData.isRowAvailable()) {
log.severe("Row is not available. Rowindex = " + currentRow);
break;
}
if (nc == 0) {
// first column in table, start new row
beforeRow(facesContext, uiData);
// is the current row listed in the bodyrows attribute
if (ArrayUtils.contains(bodyrows, currentRow)) {
// close any preopened TBODY element first
if (bodyrowsCount != 0) {
HtmlRendererUtils.writePrettyLineSeparator(facesContext);
writer.endElement(HTML.TBODY_ELEM);
}
HtmlRendererUtils.writePrettyLineSeparator(facesContext);
writer.startElement(HTML.TBODY_ELEM, uiData);
// Do not attach bodyrowsCount to the first TBODY
// element, because of backward compatibility
writer.writeAttribute(HTML.ID_ATTR, component.getClientId(facesContext) + ":tbody_element" + (bodyrowsCount == 0 ? "" : bodyrowsCount),
null);
bodyrowsCount++;
}
HtmlRendererUtils.writePrettyLineSeparator(facesContext);
renderRowStart(facesContext, writer, uiData, styles, nr);
rowStartRendered = true;
}
List<UIComponent> children = null;
for (int j = 0, size = getChildCount(component); j < size; j++) {
if (children == null) {
children = getChildren(component);
}
UIComponent child = children.get(j);
if (child.isRendered()) {
boolean columnRendering = child instanceof UIColumn;
if (columnRendering) {
beforeColumn(facesContext, uiData, j);
}
encodeColumnChild(facesContext, writer, uiData, child, styles, nc * uiData.getChildCount() + j);
if (columnRendering) {
afterColumn(facesContext, uiData, j);
}
}
}
if (hasNewspaperTableSpacer(uiData)) {
// draw the spacer facet
if (nc < newspaperColumns - 1) {
renderSpacerCell(facesContext, writer, uiData);
}
}
}
if (rowStartRendered) {
renderRowEnd(facesContext, writer, uiData);
afterRow(facesContext, uiData);
}
}
if (bodyrowsCount != 0) {
// close the last TBODY element
HtmlRendererUtils.writePrettyLineSeparator(facesContext);
writer.endElement(HTML.TBODY_ELEM);
}
}
@Override
protected void renderRowStart(FacesContext facesContext, ResponseWriter writer, UIData uiData, Styles styles, int rowStyleIndex) throws IOException {
writer.startElement(HTML.TR_ELEM, null); // uiData);
renderRowStyle(facesContext, writer, uiData, styles, rowStyleIndex);
Object obj = uiData.getRowData();
boolean isHide = false;
if (obj instanceof TableRow) {
isHide = ((TableRow) obj).isHide();
}
if (isHide) {
writer.writeAttribute("style", "display: none;", null);
}
Object rowId = uiData.getAttributes().get(org.apache.myfaces.shared.renderkit.JSFAttr.ROW_ID);
if (rowId != null) {
writer.writeAttribute(HTML.ID_ATTR, rowId.toString(), null);
}
}
private void encodeInnerHtmlUnknownRowCount(FacesContext facesContext, UIComponent component) throws IOException {
UIData uiData = (UIData) component;
ResponseWriter writer = facesContext.getResponseWriter();
Styles styles = getStyles(uiData);
Integer[] bodyrows = getBodyRows(facesContext, component);
int bodyrowsCount = 0;
int first = uiData.getFirst();
int rows = uiData.getRows();
int currentRow = first;
boolean isRowRendered = false;
while (true) {
uiData.setRowIndex(currentRow);
if (!uiData.isRowAvailable()) {
break;
}
isRowRendered = true;
// first column in table, start new row
beforeRow(facesContext, uiData);
// is the current row listed in the bodyrows attribute
if (ArrayUtils.contains(bodyrows, currentRow)) {
// close any preopened TBODY element first
if (bodyrowsCount != 0) {
HtmlRendererUtils.writePrettyLineSeparator(facesContext);
writer.endElement(HTML.TBODY_ELEM);
}
HtmlRendererUtils.writePrettyLineSeparator(facesContext);
writer.startElement(HTML.TBODY_ELEM, uiData);
// Do not attach bodyrowsCount to the first TBODY element,
// because of backward compatibility
writer.writeAttribute(HTML.ID_ATTR, component.getClientId(facesContext) + ":tbody_element" + (bodyrowsCount == 0 ? "" : bodyrowsCount), null);
bodyrowsCount++;
}
HtmlRendererUtils.writePrettyLineSeparator(facesContext);
renderRowStart(facesContext, writer, uiData, styles, currentRow);
List<UIComponent> children = null;
for (int j = 0, size = getChildCount(component); j < size; j++) {
if (children == null) {
children = getChildren(component);
}
UIComponent child = children.get(j);
if (child.isRendered()) {
boolean columnRendering = child instanceof UIColumn;
if (columnRendering) {
beforeColumn(facesContext, uiData, j);
}
encodeColumnChild(facesContext, writer, uiData, child, styles, j);
if (columnRendering) {
afterColumn(facesContext, uiData, j);
}
}
}
renderRowEnd(facesContext, writer, uiData);
afterRow(facesContext, uiData);
currentRow++;
if (rows > 0 && currentRow - first > rows) {
break;
}
}
if (!isRowRendered) {
// nothing to render, to get valid xhtml we render an empty dummy
// row
writer.startElement(HTML.TBODY_ELEM, uiData);
writer.writeAttribute(HTML.ID_ATTR, component.getClientId(facesContext) + ":tbody_element", null);
writer.startElement(HTML.TR_ELEM, uiData);
writer.startElement(HTML.TD_ELEM, uiData);
writer.endElement(HTML.TD_ELEM);
writer.endElement(HTML.TR_ELEM);
writer.endElement(HTML.TBODY_ELEM);
return;
}
if (bodyrowsCount != 0) {
// close the last TBODY element
HtmlRendererUtils.writePrettyLineSeparator(facesContext);
writer.endElement(HTML.TBODY_ELEM);
}
}
private Integer[] getBodyRows(FacesContext facesContext, UIComponent component) {
Integer[] bodyrows = null;
String bodyrowsAttr = (String) component.getAttributes().get(JSFAttr.BODYROWS_ATTR);
if (bodyrowsAttr != null && !"".equals(bodyrowsAttr)) {
String[] bodyrowsString = StringUtils.trim(StringUtils.splitShortString(bodyrowsAttr, ','));
// parsing with no exception handling, because of JSF-spec:
// "If present, this must be a comma separated list of integers."
bodyrows = new Integer[bodyrowsString.length];
for (int i = 0; i < bodyrowsString.length; i++) {
bodyrows[i] = new Integer(bodyrowsString[i]);
}
} else {
bodyrows = ZERO_INT_ARRAY;
}
return bodyrows;
}
}
Entschuldigung, das ist nicht wirklich eine Option - diese Tabelle zeigt bestimmte anwendungsweite Referenzdaten, außer in diesem speziellen Fall, dass Daten nur unter bestimmten Bedingungen angezeigt werden können. – Elie
Dann zwei Sammlungen, eine mit allen Daten, die zweite mit dem Zeug zur Anzeige? – Naganalf
Das Problem ist, dass ich 2 Zeilen habe, und je nach Fall manchmal Zeile A, manchmal Zeile B und manchmal beides anzeigen. Mehrere Sätze zu behalten würde bedeuten, dass ich drei Versionen davon behalten muss, was nicht ideal ist. Ich hoffe, es gibt noch einen anderen Weg, dies zu tun. – Elie