diff options
Diffstat (limited to 'BJC-Utils2/src/main/java/bjc/utils/esodata/SpaghettiStack.java')
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/esodata/SpaghettiStack.java | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/BJC-Utils2/src/main/java/bjc/utils/esodata/SpaghettiStack.java b/BJC-Utils2/src/main/java/bjc/utils/esodata/SpaghettiStack.java deleted file mode 100644 index 7c8c757..0000000 --- a/BJC-Utils2/src/main/java/bjc/utils/esodata/SpaghettiStack.java +++ /dev/null @@ -1,99 +0,0 @@ -package bjc.utils.esodata; - -import java.util.Arrays; -import java.util.stream.Stream; - -/* - * Implements a spaghetti stack, which is a stack that is branched off of a - * parent stack. - * - * @param T The datatype stored in the stack. - * @author Ben Culkin - */ -class SpaghettiStack<T> extends Stack<T> { - private final Stack<T> backing; - - private final Stack<T> parent; - - /** - * Create a new empty spaghetti stack, off of the specified parent. - * - * @param par - * The parent stack - */ - public SpaghettiStack(final Stack<T> par) { - backing = new SimpleStack<>(); - - parent = par; - } - - @Override - public void push(final T elm) { - backing.push(elm); - } - - @Override - public T pop() { - if (backing.empty()) return parent.pop(); - - return backing.pop(); - } - - @Override - public T top() { - if (backing.empty()) return parent.top(); - - return backing.top(); - } - - @Override - public int size() { - return parent.size() + backing.size(); - } - - @Override - public boolean empty() { - return backing.empty() && parent.empty(); - } - - @SuppressWarnings("unchecked") - @Override - public T[] toArray() { - return (T[]) Stream.concat(Arrays.stream(parent.toArray()), Arrays.stream(backing.toArray())).toArray(); - } - - @Override - public int hashCode() { - final int prime = 31; - - int result = 1; - result = prime * result + (backing == null ? 0 : backing.hashCode()); - result = prime * result + (parent == null ? 0 : parent.hashCode()); - - return result; - } - - @Override - public boolean equals(final Object obj) { - if (this == obj) return true; - if (obj == null) return false; - if (!(obj instanceof SpaghettiStack<?>)) return false; - - final SpaghettiStack<?> other = (SpaghettiStack<?>) obj; - - if (backing == null) { - if (other.backing != null) return false; - } else if (!backing.equals(other.backing)) return false; - - if (parent == null) { - if (other.parent != null) return false; - } else if (!parent.equals(other.parent)) return false; - - return true; - } - - @Override - public String toString() { - return String.format("SpaghettiStack [backing=%s, parent=%s]", backing, parent); - } -} |
