public static <T extends Comparable<T>> Range<T> parse(String value, Function<String, T> parser) {
Validate.notNull(parser, "Parser is required");
if (StringUtils.isBlank(value) || StringUtils.equals(SEPARATOR, value)) {
return Ranges.all();
} else if (!StringUtils.contains(value, SEPARATOR)) {
T element = parser.apply(value);
return Ranges.atMost(element);
} else {
String lower = StringUtils.substringBefore(value, SEPARATOR);
String upper = StringUtils.substringAfter(value, SEPARATOR);
if (StringUtils.isBlank(lower)) {
// ..n
Pair<T, BoundType> boundary = parseUpperBoundary(upper, parser);
return Ranges.upTo(boundary.getLeft(), boundary.getRight());
} else if (StringUtils.isBlank(upper)) {
// n..
Pair<T, BoundType> boundary = parseLowerBoundary(lower, parser);
return Ranges.downTo(boundary.getLeft(), boundary.getRight());
} else {
// n..m
Pair<T, BoundType> down = parseLowerBoundary(lower, parser);
Pair<T, BoundType> up = parseUpperBoundary(upper, parser);
return Ranges.range(down.getLeft(), down.getRight(), up.getLeft(), up.getRight());
}
}
}
@Test
public void isConnected() {
assertThat(Ranges.closed(3, 5).isConnected(Ranges.open(5, 10)), is(true));
assertThat(Ranges.closed(0, 9).isConnected(Ranges.closed(3, 4)), is(true));
assertThat(Ranges.closed(0, 5).isConnected(Ranges.closed(3, 9)), is(true));
assertThat(Ranges.open(3, 5).isConnected(Ranges.open(5, 10)), is(false));
assertThat(Ranges.closed(1, 5).isConnected(Ranges.closed(6, 10)), is(false));
}
protected final ContiguousSet<Integer> checkedCreate(SortedSet<Integer> elementsSet) {
List<Integer> elements = newArrayList(elementsSet);
/*
* A ContiguousSet can't have holes. If a test demands a hole, it should be changed so that it
* doesn't need one, or it should be suppressed for ContiguousSet.
*/
for (int i = 0; i < elements.size() - 1; i++) {
assertEquals(elements.get(i) + 1, (int) elements.get(i + 1));
}
Range<Integer> range =
(elements.isEmpty()) ? Ranges.closedOpen(0, 0) : Ranges.encloseAll(elements);
return range.asSet(DiscreteDomains.integers());
}
@Test
public void openClosed() {
System.out.println("## openClosed ##");
Range<Integer> range = Ranges.openClosed(0, 10);
System.out.println(range);
printAllElements(range);
}
@Test
public void closedOpen() {
System.out.println("## closedOpen ##");
Range<Integer> range = Ranges.closedOpen(0, 10);
System.out.println(range);
printAllElements(range);
}
public static List<Range<Integer>> parseToRange(String value) {
List<Range<Integer>> validRanges = new ArrayList<Range<Integer>>();
String[] codes = value.split(",");
for (String code : codes) {
String[] fromTo = code.trim().split(":");
checkArgument(
fromTo.length <= 2, "Code %s should be an interval from:to or a single value", code);
Integer from;
try {
from = Integer.parseInt(fromTo[0]);
} catch (NumberFormatException nfe) {
throw new IllegalArgumentException("Invalid number " + fromTo[0]);
}
Integer to = from;
if (fromTo.length != 1) {
try {
to = Integer.parseInt(fromTo[1]);
} catch (NumberFormatException nfe) {
throw new IllegalArgumentException("Invalid number " + fromTo[1]);
}
}
checkArgument(from <= to, "Interval %s should be FROM less than TO", code);
validRanges.add(Ranges.closed(from, to));
}
return validRanges;
}
@Test
public void filterUsingLessThan() {
List<Double> scores = Lists.newArrayList(3.0, 3.5, 4.0, 4.5, 5.0);
double median = getMedian(scores);
List<Double> belowMedian =
Lists.newArrayList(Iterables.filter(scores, Ranges.lessThan(median)));
System.out.println(belowMedian);
}
@Override
protected SortedSet<Integer> create(Integer[] elements) {
SortedSet<Integer> set = nullCheckedTreeSet(elements);
if (set.isEmpty()) {
/*
* The (tooLow + 1, tooHigh) arguments below would be invalid because tooLow would be
* greater than tooHigh.
*/
return Ranges.openClosed(0, 1).asSet(DiscreteDomains.integers()).subSet(0, 1);
}
int tooHigh = set.last() + 1;
int tooLow = set.first() - 1;
set.add(tooHigh);
set.add(tooLow);
return checkedCreate(set).subSet(tooLow + 1, tooHigh);
}
private List<ScheduledCommand> createMoveCommands(final double length) {
if (Math.abs(length) < 1) {
return ImmutableList.<ScheduledCommand>of();
}
final double currentAngle = workspace.getCurrentAngle();
final ScheduledCommand command =
new ScheduledCommand() {
@Override
public void execute() {
workspace.updatePosition(length > 0 ? 1.0 : -1.0, currentAngle);
}
};
final Function<Integer, ScheduledCommand> function =
new Function<Integer, ScheduledCommand>() {
@Override
public ScheduledCommand apply(Integer input) {
return command;
}
};
final List<Integer> range =
Ranges.closed(1, (int) length).asSet(DiscreteDomains.integers()).asList();
return transform(range, function);
}
@Test
public void span() {
assertThat(Ranges.closed(3, 5).span(Ranges.open(5, 10)), is(Ranges.closedOpen(3, 10)));
assertThat(Ranges.closed(0, 9).span(Ranges.closed(3, 4)), is(Ranges.closed(0, 9)));
assertThat(Ranges.closed(0, 5).span(Ranges.closed(3, 9)), is(Ranges.closed(0, 9)));
assertThat(Ranges.open(3, 5).span(Ranges.open(5, 10)), is(Ranges.open(3, 10)));
assertThat(Ranges.closed(1, 5).span(Ranges.closed(6, 10)), is(Ranges.closed(1, 10)));
}
@Test(expected = IllegalArgumentException.class)
public void intersectionWhenNoIntersectionFound() {
Ranges.open(3, 5).intersection(Ranges.open(5, 10));
}
@Test
public void intersection() {
assertThat(Ranges.closed(3, 5).intersection(Ranges.open(5, 10)), is(Ranges.openClosed(5, 5)));
assertThat(Ranges.closed(0, 9).intersection(Ranges.closed(3, 4)), is(Ranges.closed(3, 4)));
assertThat(Ranges.closed(0, 5).intersection(Ranges.closed(3, 9)), is(Ranges.closed(3, 5)));
}
