/** Construct an iterable containing the nodes of a tree with the specified roots and midwife. */
public TreeIterable(
Iterable<? extends E> roots,
Transformer<? super E, ? extends Iterable<? extends E>> transformer) {
super();
if ((roots == null) || (transformer == null)) {
throw new NullPointerException();
}
this.roots = roots;
this.transformer = TransformerTools.toIterator(transformer);
}
protected PropertyValueModel<EclipseLinkConvert> buildEclipseLinkConvertModel(
PropertyValueModel<Converter> converterModel) {
return new TransformationPropertyValueModel<Converter, EclipseLinkConvert>(
converterModel, TransformerTools.nullCheck(EclipseLinkConvert.CONVERTER_TRANSFORMER));
}