/** pre-condition: mergeTo and beMerged are isostructural */
private static void mergeFiles0(@Nonnull File mergeTo, @Nonnull File beMerged) {
if (mergeTo.getClass() == DirectoryFile.class) {
mergeDirectoryFiles((DirectoryFile) mergeTo, (DirectoryFile) beMerged);
} else if (mergeTo.getClass() == RegularFile.class) {
mergeRegularFiles((RegularFile) mergeTo, (RegularFile) beMerged);
} else {
throw new UnsupportedOperationException("Unsupported File Type:" + mergeTo.getClass());
}
}
private boolean isostructuralEquals(File o1, File o2) {
return o1 == o2
|| ( // ignore UselessParentheses. have it more clear
o1.getClass() == o2.getClass() // NOPMD
&& isostructuralEquals(o1.getParent(), o2.getParent())
&& Objects.equals(o1.getPath(), o2.getPath()));
}
/**
* @param file {@link RegularFile} or {@link DirectoryFile}
* @param algorithmsContainer the result which is used Algorithms in file
* @return if algorithmsContainer.containsAll(ALL_ALGORITHMS)
*/
private static boolean getUsedAlgorithms0(File file, Set<Hash.Algorithm> algorithmsContainer) {
if (file instanceof RegularFile) {
algorithmsContainer.addAll(getUsedAlgorithms1((RegularFile) file));
return algorithmsContainer.size() == ALL_ALGORITHMS_LENGTH;
} else if (file instanceof DirectoryFile) {
for (File child : file.getChildren()) {
if (getUsedAlgorithms0(child, algorithmsContainer)) {
return true;
}
}
return false;
} else {
throw new RuntimeException("Shouldn't goto here");
}
}