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a simplejapanese address parser

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package org.unlaxer.util.collection;

import java.util.List;
import java.util.Optional;
import java.util.function.Predicate;
import java.util.stream.Collectors;

public interface TreeNodeList extends List>{
	
	public static  TreeNodeList empty(){
		return new TreeNodeListImpl();
	}
	
	public default Optional findAsContent(Predicate predicate){
		
		for (int i = 0 ; i < size() ; i ++) {
			TreeNode treeNode = get(i);
			T content = treeNode.get();
			if(predicate.test(content)) {
				return Optional.of(content);
			}
		}
		return Optional.empty();
	}
	
	public default Optional> find(Predicate predicate){
		
		for (int i = 0 ; i < size() ; i ++) {
			TreeNode treeNode = get(i);
			T content = treeNode.get();
			if(predicate.test(content)) {
				return Optional.of(treeNode);
			}
		}
		return Optional.empty();
	}
	
	public default List unwrap() {
		return stream()
			.map(TreeNode::get)
			.collect(Collectors.toList());
	}
}