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package net.amygdalum.util.text.linkeddawg;

import net.amygdalum.util.text.ByteFallbackAdaptor;
import net.amygdalum.util.text.ByteNode;
import net.amygdalum.util.text.NodeResolver;

public class ByteTerminalFallbackNode implements ByteNode, ByteFallbackAdaptor {

	private static final byte[] NONE = new byte[0];

	private ByteNode fallbackNode;
	private T attached;

	public ByteTerminalFallbackNode(T attached) {
		this.attached = attached;
	}

	public static  ByteTerminalFallbackNode buildNodeFrom(ByteNode node, NodeResolver> resolver) {
		if (node.getAlternativesSize() > 0) {
			return null;
		}
		ByteTerminalFallbackNode buildNode = new ByteTerminalFallbackNode<>(node.getAttached());
		ByteNode fallbackNode = ByteFallbackAdaptor.getFallback(node);
		if (fallbackNode != null) {
			buildNode.setFallback(fallbackNode);
		}
		return buildNode;
	}

	@Override
	public ByteNode nextNode(byte b) {
		return null;
	}

	@Override
	public T getAttached() {
		return attached;
	}

	@Override
	public byte[] getAlternatives() {
		return NONE;
	}

	@Override
	public int getAlternativesSize() {
		return 0;
	}

	@Override
	public void setFallback(ByteNode fallbackNode) {
		this.fallbackNode = fallbackNode;
	}

	@Override
	public ByteNode getFallback() {
		return fallbackNode;
	}
}