package jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl;

import java.nio.ByteBuffer;
import java.util.Iterator;

import fj.Ord;
import fj.data.List;
import fj.data.TreeMap;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.core.Node;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.trasnformer.EditableAttributes;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.trasnformer.EditableChildren;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.trasnformer.EditableNode;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.traverser.Children;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.IterableWrapper;

public class DefaultNode implements EditableNode
{
	public List<DefaultNode> children;
	public TreeMap<String,ByteBuffer> attrs;
	
	private static final List<DefaultNode> NIL_LIST = List.nil();
	private static final TreeMap<String,ByteBuffer> NIL_MAP = TreeMap.empty(Ord.stringOrd);
	
	public DefaultNode()
	{
		this(NIL_LIST,NIL_MAP);
	}
	
	public DefaultNode(List<DefaultNode> _children,TreeMap<String,ByteBuffer> _attrs)
	{
		attrs = _attrs;
		children = _children;
	}

	@Override
	public EditableChildren getChildren()
	{
		return new DefaultChildren(children,attrs);
	}

	@Override
	public EditableAttributes getAttributes()
	{
		return new DefaultAttributes(children,attrs);
	}

	@Override
	public Children<Node> children()
	{
		return new Children<Node>(){
			@Override
			public Iterator<Node> iterator()
			{
				return (new IterableWrapper<Node>(children)).iterator();
			}

			@Override
			public int size()
			{
				return children.length();
			}
		};
	}
}