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miercuri, 6 mai 2015

[OmniFaces utilities 2.0] Convert an iterable into a list

[OmniFaces utilities] The iterableToList() method converts an iterable into a list. This method makes NO guarantee to whether changes to the source iterable are reflected in the returned list or not. For instance if the given iterable already is a list, it's returned directly.


For example, OmniFaces uses this utility in its custom DataModel named, IterableDataModel. In order to override the setWrappedData() method:

import static org.omnifaces.util.Utils.iterableToList;
private Iterable<E> iterable;
private List<E> list;
public void setWrappedData(Object data) {
 if (data == null) {
     iterable = null;
     list = null;
 } else {
     iterable = (Iterable<E>) data;
     list = iterableToList(iterable);

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