diff options
| author | Ben Culkin <scorpress@gmail.com> | 2020-04-07 21:03:53 -0400 |
|---|---|---|
| committer | Ben Culkin <scorpress@gmail.com> | 2020-04-07 21:03:53 -0400 |
| commit | 002516bd03b2ea3f731c8139c9a5f716902ab702 (patch) | |
| tree | 4b45260e0b411dd070ae5d2f45e8f2795bf91b79 /base/src/main/java/bjc/utils/data/QueuedIterator.java | |
| parent | d6afd99961aacd6ce915629773723cb6c6e145a7 (diff) | |
Finish remove utils.data
utils.data now lives in the esodata project; not in this one
Diffstat (limited to 'base/src/main/java/bjc/utils/data/QueuedIterator.java')
| -rw-r--r-- | base/src/main/java/bjc/utils/data/QueuedIterator.java | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/base/src/main/java/bjc/utils/data/QueuedIterator.java b/base/src/main/java/bjc/utils/data/QueuedIterator.java deleted file mode 100644 index 571f2b5..0000000 --- a/base/src/main/java/bjc/utils/data/QueuedIterator.java +++ /dev/null @@ -1,229 +0,0 @@ -package bjc.utils.data; - -import java.util.ArrayDeque; -import java.util.Deque; -import java.util.Iterator; - -/** - * An iterator that supports queuing elements after/before the current iterator; - * - * @author bjculkin - * - * @param <E> The type of element this iterator iterates over. - */ -public class QueuedIterator<E> implements Iterator<E> { - private Iterator<E> cur; - - private Deque<Iterator<E>> pending; - - /** - * Static method for constructing iterators. - * - * @return A queued iterator. - */ - public static <E> QueuedIterator<E> queued() { - return new QueuedIterator<>(); - } - - /** - * Static method for constructing iterators. - * - * @param vals - * The values to iterate over. - * - * @return A queued iterator. - */ - @SafeVarargs - public static <E> QueuedIterator<E> queued(E... vals) { - return new QueuedIterator<>(new ArrayIterator<>(vals)); - } - - /** - * Static method for constructing iterators. - * - * @param itrs - * The iterators to use. - * - * @return A queued iterator over the provided iterators. - */ - @SafeVarargs - public static <E> QueuedIterator<E> queued(Iterator<E>... itrs) { - return new QueuedIterator<>(itrs); - } - - /** - * Static method for constructing iterators. - * - * @param itrs - * The iterables to use. - * - * @return A queued iterator over the provided iterables. - */ - @SafeVarargs - public static <E> QueuedIterator<E> queued(Iterable<E>... itrs) { - return new QueuedIterator<>(itrs); - } - - /** - * Create a new queued iterator that starts blank. - */ - public QueuedIterator() { - pending = new ArrayDeque<>(); - } - - /** - * Create a new queued iterator with a set of initial sources. - * - * @param inits - * The set of initial iterators to use. - */ - @SafeVarargs - public QueuedIterator(Iterator<E>... inits) { - this(); - - for (Iterator<E> init : inits) { - pending.add(init); - } - } - - /** - * Create a new queued iterator with a set of initial sources. - * - * @param inits - * The set of initial iterables to use. - */ - @SafeVarargs - public QueuedIterator(Iterable<E>... inits) { - this(); - - for (Iterable<E> init : inits) { - pending.add(init.iterator()); - } - } - - /** - * Create a new queued iterator with a set of initial values. - * - * @param vals - * The set of initial values to use. - */ - @SafeVarargs - public QueuedIterator(E... vals) { - this(new ArrayIterator<>(vals)); - } - - /** - * Add a new iterator who we will iterate through first. - * - * @param itr - * The iterator to go through first. - */ - public void before(Iterator<E> itr) { - pending.push(cur); - - cur = itr; - } - - /** - * Add a new iterable who we will iterate through first. - * - * @param itr - * The iterable to go through first. - */ - public void before(Iterable<E> itr) { - before(itr.iterator()); - } - - /** - * Add a new set of values who we will iterate through first. - * - * @param vals - * Values to iterate over first. - */ - public void before(@SuppressWarnings("unchecked") E... vals) { - before(new ArrayIterator<>(vals)); - } - - /** - * Add a new iterator who we will iterate through next. - * - * @param itr - * The iterator to go through next. - */ - public void after(Iterator<E> itr) { - pending.push(itr); - } - - /** - * Add a new iterable who we will iterate through next. - * - * @param itr - * The iterable to go through next. - */ - public void after(Iterable<E> itr) { - after(itr.iterator()); - } - - /** - * Add a new set of values who we will iterate through next. - * - * @param vals - * The values to iterate over next. - */ - public void after(@SuppressWarnings("unchecked") E... vals) { - after(new ArrayIterator<>(vals)); - } - - /** - * Add a new iterator who we will iterate through last. - * - * @param itr - * The iterator to go through last. - */ - public void last(Iterator<E> itr) { - pending.add(itr); - } - - /** - * Add a new iterable who we will iterate through last. - * - * @param itr - * The iterable to go through last. - */ - public void last(Iterable<E> itr) { - last(itr.iterator()); - } - - /** - * Add a new set of values who we will iterate through last. - * - * @param vals - * The values we will iterate over. - */ - public void last(@SuppressWarnings("unchecked") E... vals) { - last(new ArrayIterator<>(vals)); - } - - @Override - public boolean hasNext() { - while (cur == null || !cur.hasNext()) { - if (pending.isEmpty()) return false; - - cur = pending.pop(); - } - - return cur.hasNext(); - } - - @Override - public E next() { - while (cur == null || !cur.hasNext()) { - if (pending.isEmpty()) return null; - - cur = pending.pop(); - } - - return cur.next(); - } - -} |
