/**
* Algorithm works as follows; - If it's an input component, submitted value is checked first
* since it'd be the value to be used in case validation errors terminates jsf lifecycle - Finally
* the value of the component is retrieved from backing bean and if there's a converter, converted
* value is returned
*
* <p>- If the component is not a value holder, toString of component is used to support Facelets
* UIInstructions.
*
* @param facesContext FacesContext instance
* @param component UIComponent instance whose value will be returned
* @return End text
*/
public static String getStringValueToRender(FacesContext facesContext, UIComponent component) {
if (component instanceof ValueHolder) {
if (component instanceof EditableValueHolder) {
Object submittedValue = ((EditableValueHolder) component).getSubmittedValue();
if (submittedValue != null) {
return submittedValue.toString();
}
}
ValueHolder valueHolder = (ValueHolder) component;
Object value = valueHolder.getValue();
if (value == null) return "";
// first ask the converter
if (valueHolder.getConverter() != null) {
return valueHolder.getConverter().getAsString(facesContext, component, value);
}
// Try to guess
else {
ValueExpression expr = component.getValueExpression("value");
if (expr != null) {
Class<?> valueType = expr.getType(facesContext.getELContext());
if (valueType != null) {
Converter converterForType = facesContext.getApplication().createConverter(valueType);
if (converterForType != null)
return converterForType.getAsString(facesContext, component, value);
}
}
}
// No converter found just return the value as string
return value.toString();
} else {
// This would get the plain texts on UIInstructions when using Facelets
String value = component.toString();
if (value != null) return value.trim();
else return "";
}
}
Object getValue() {
Map<UIData, Integer> savedRowIndexes = new HashMap<UIData, Integer>();
// save current row and set row needed to get value
for (Iterator<UIData> i = reverse(uiDataRowMap.keySet().iterator()); i.hasNext(); ) {
UIData uiData = i.next();
savedRowIndexes.put(uiData, uiData.getRowIndex());
uiData.setRowIndex(uiDataRowMap.get(uiData));
}
Object value = component.getValue();
// restore rows
for (Iterator<UIData> i = reverse(savedRowIndexes.keySet().iterator()); i.hasNext(); ) {
UIData uiData = i.next();
uiData.setRowIndex(savedRowIndexes.get(uiData));
}
return value;
}