Mercurial > hg > Members > kazuma > jungle-ormapper
view src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/data/list/headNode.java @ 0:44465893e8b8
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author | Kazuma |
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date | Wed, 30 Nov 2016 01:47:55 +0900 |
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package jp.ac.u_ryukyu.ie.cr.jungle.data.list; public class headNode<T> implements Node<T> { private final Node<T> next; public headNode() { this.next = new TailNode<>(); } public headNode(Node<T> next) { this.next = next; } public Node<T> getNext() { return next; } public T getAttribute() { return null; } public Node<T> add(int currentNum, int num, T attribute) { if (num == 0) { Node<T> newNode = new DefaultNode<>(attribute, next); return new headNode<>(newNode); } Node<T> newNode = next.add(currentNum + 1, num, attribute); if (newNode == null) return this; return new headNode<>(newNode); } public Node<T> addLast(T attribute) { Node<T> node = next.addLast(attribute); return new headNode<>(node); } public Node<T> delete(int currentNum, int deleteNum) { if (currentNum == deleteNum) { return new headNode<>(this.next.getNext()); } Node<T> newNode = next.delete(currentNum + 1, deleteNum); if (newNode == null) return this; return new headNode<>(newNode); } @Override public Node<T> replaceNode(int currentNum, int num, T attribute) { Node<T> nextNode = getNext(); Node<T> newNode = nextNode.replaceNode(currentNum, num, attribute); if (newNode == null) return this; return new headNode<>(newNode); } @Override public int length() { return next.length(); } }