/** pre-condition: mergeTo and beMerged are isostructural */
private static void mergeRegularFiles(
@Nonnull RegularFile mergeTo, @Nonnull RegularFile beMerged) {
final Map<Hash.Algorithm, Hash> hashesInMergeTo = mergeTo.getHashes();
for (Map.Entry<Hash.Algorithm, Hash> entry : beMerged.getHashes().entrySet()) {
final Hash.Algorithm algorithm = entry.getKey();
final Hash hashInMergeTo = hashesInMergeTo.get(algorithm);
final Hash hashInBeMerged = entry.getValue();
if (hashInMergeTo == null) {
hashesInMergeTo.put(algorithm, hashInBeMerged);
} else {
if (!Objects.equals(hashInMergeTo, hashInBeMerged)) {
throw new IllegalStateException(
"mergeTo and beMerged have different " + algorithm + " hash value");
}
}
}
}
static Set<Hash.Algorithm> getUsedAlgorithms1(RegularFile file) {
Set<Hash.Algorithm> algorithms = EnumSet.noneOf(Hash.Algorithm.class);
for (Map.Entry<Hash.Algorithm, Hash> entry : file.getHashes().entrySet()) {
if (entry.getValue() != null) {
algorithms.add(entry.getKey());
}
}
return algorithms;
}