public final void setValue(Object value) {
selectedValues = Generics.newArrayList();
if (value != null) {
Collection<?> collection = (Collection<?>) value;
selectedValues.addAll(collection);
}
}
private void updateSelection(String[] indexes) {
List<OptionItem> options = getOptionItems();
selectedValues = Generics.newArrayList();
if (indexes != null) {
for (int i = 0; i < indexes.length; i++) {
int index = Integer.parseInt(indexes[i]);
if (index != -1) {
selectedValues.add(((OptionItem) options.get(index)).getValue());
}
}
}
validate();
}
@SuppressWarnings("unchecked")
public Object getValue() {
Collection<Object> collection = null;
if (getEditorBinding() != null) {
collection = (Collection<Object>) getEditorBinding().getValue();
}
if (collection == null) {
collection = SpringUtils.newInstance(collectionClass);
}
ArrayList<?> oldValues = Generics.newArrayList(collection);
collection.clear();
for (Object value : selectedValues) {
int i = oldValues.indexOf(value);
if (i >= 0) {
value = oldValues.get(i);
}
collection.add(value);
}
return collection;
}
/**
* Abstract superclass for elements that let the user choose from a set of options like selectboxes
* or radio button groups.
*/
public abstract class AbstractMultiSelectElement extends AbstractSelectElement {
private List<Object> selectedValues = Generics.newArrayList();
@SuppressWarnings("unchecked")
private Class<? extends Collection> collectionClass;
private Integer maxSelection;
/**
* Sets the class to use if a new collection instance needs to be created. If no class is set a
* suitable implementation will be selected according to the type of the property the element is
* bound to.
*
* @param collectionClass the class to use for new collections
*/
public void setCollectionClass(Class<? extends Collection<?>> collectionClass) {
this.collectionClass = collectionClass;
}
@SuppressWarnings("unchecked")
public Class<? extends Collection> getCollectionClass() {
return this.collectionClass;
}
public void setMaxSelection(Integer maxSelection) {
this.maxSelection = maxSelection;
}
@SuppressWarnings("unchecked")
protected void afterBindingSet() {
if (collectionClass == null) {
Class<?> type = getEditorBinding().getPropertyType();
if (type.isInterface()) {
if (Set.class.isAssignableFrom(type)) {
collectionClass = HashSet.class;
} else {
collectionClass = ArrayList.class;
}
} else if (Collection.class.isAssignableFrom(type)) {
collectionClass = (Class<Collection>) type;
} else {
collectionClass = ArrayList.class;
}
}
}
public final void setValue(Object value) {
selectedValues = Generics.newArrayList();
if (value != null) {
Collection<?> collection = (Collection<?>) value;
selectedValues.addAll(collection);
}
}
@SuppressWarnings("unchecked")
public Object getValue() {
Collection<Object> collection = null;
if (getEditorBinding() != null) {
collection = (Collection<Object>) getEditorBinding().getValue();
}
if (collection == null) {
collection = SpringUtils.newInstance(collectionClass);
}
ArrayList<?> oldValues = Generics.newArrayList(collection);
collection.clear();
for (Object value : selectedValues) {
int i = oldValues.indexOf(value);
if (i >= 0) {
value = oldValues.get(i);
}
collection.add(value);
}
return collection;
}
protected Collection<Object> getSelectedValues() {
return selectedValues;
}
protected boolean hasSelection() {
return !selectedValues.isEmpty();
}
public boolean isSelected(OptionItem option) {
return selectedValues != null && selectedValues.contains(option.getValue());
}
/** @see org.riotfamily.forms.AbstractElement#processRequest */
public void processRequest(FormRequest request) {
updateSelection(request.getParameterValues(getParamName()));
}
protected void updateSelection(Collection<?> optionValues) {
if (optionValues != null) {
for (Object value : optionValues) {
int i = selectedValues.indexOf(value);
if (i >= 0) {
selectedValues.remove(i);
selectedValues.add(i, value);
}
}
}
}
private void updateSelection(String[] indexes) {
List<OptionItem> options = getOptionItems();
selectedValues = Generics.newArrayList();
if (indexes != null) {
for (int i = 0; i < indexes.length; i++) {
int index = Integer.parseInt(indexes[i]);
if (index != -1) {
selectedValues.add(((OptionItem) options.get(index)).getValue());
}
}
}
validate();
}
public void validate() {
super.validate();
if (maxSelection != null && selectedValues.size() > maxSelection.intValue()) {
ErrorUtils.reject(this, "tooManyValuesSelected", maxSelection);
}
}
public void handleJavaScriptEvent(JavaScriptEvent event) {
if (event.getType() == JavaScriptEvent.ON_CHANGE) {
Collection<Object> oldValue = selectedValues;
updateSelection(event.getValues());
fireChangeEvent(selectedValues, oldValue);
}
}
}