net.amygdalum.util.text.linkeddawg.LinkedCharFallbackNavigator Maven / Gradle / Ivy

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package net.amygdalum.util.text.linkeddawg;

import static net.amygdalum.util.text.CharUtils.charToString;

import net.amygdalum.util.text.CharFallbackAdaptor;
import net.amygdalum.util.text.CharFallbackNavigator;
import net.amygdalum.util.text.CharNode;
import net.amygdalum.util.text.WordSetNavigationException;

public class LinkedCharFallbackNavigator implements CharFallbackNavigator> {

	private CharNode node;

	public LinkedCharFallbackNavigator(CharNode node) {
		this.node = node;
	}

	@Override
	public LinkedCharFallbackNavigator nextNode(char c) {
		node = node.nextNode(c);
		if (node == null) {
			throw new WordSetNavigationException("unexpected navigation to " + charToString(c));
		}
		return this;
	}

	@Override
	public LinkedCharFallbackNavigator fallback() {
		node = CharFallbackAdaptor.getFallback(node);
		return this;
	}

	@Override
	public T getAttached() {
		return node.getAttached();
	}

}