private static PackageSource createMultiSource(String packageName, PackageSource[] sources) {
if (sources.length == 1) return sources[0];
ArrayList sourceList = new ArrayList(sources.length);
for (int i = 0; i < sources.length; i++) {
SingleSourcePackage[] innerSources = sources[i].getSuppliers();
for (int j = 0; j < innerSources.length; j++)
if (!sourceList.contains(innerSources[j])) sourceList.add(innerSources[j]);
}
return new MultiSourcePackage(
packageName,
(SingleSourcePackage[]) sourceList.toArray(new SingleSourcePackage[sourceList.size()]));
}
