EDIT

import java.util.ArrayList;

import java.util.List;

import java.util.UUID;

import org.springframework.util.Assert;

import eu.etaxonomy.cdm.model.description.Character;

import eu.etaxonomy.cdm.model.term.TermNode;

import eu.etaxonomy.cdm.model.term.TermType;

public class CharacterNodeDto extends TermNodeDto {

    public CharacterNodeDto(CharacterDto characterDto, TermNodeDto parent, int position, TermTreeDto treeDto, UUID uuid, String treeIndex, String path) {

        super(characterDto, parent, position, treeDto, uuid, treeIndex, path);

    }

    public static CharacterNodeDto fromTermNode(TermNode<Character> child) {

        Assert.notNull(child, "Node should not be null");

        CharacterNodeDto dto = new CharacterNodeDto(child.getTerm() != null?CharacterDto.fromCharacter(child.getTerm()): null, null, child.getParent() != null?child.getParent().getIndex(child): 0, TermTreeDto.fromTree(child.getGraph()), child.getUuid(), child.treeIndex(), child.getPath());

        if (child.getParent() != null){

            dto.setParentUuid(child.getParent().getUuid());

        }

        List<TermNodeDto> children = new ArrayList();

        for (Object o: child.getChildNodes()){

            if (o instanceof TermNode){

                TermNode childNode = (TermNode)o;

                if (childNode != null){

                    if(childNode.getTermType().equals(TermType.Character)){

                        children.add(CharacterNodeDto.fromTermNode(childNode));

                    }else{

                        children.add(TermNodeDto.fromNode(childNode));

                    }

                }

            }

        }

        dto.setChildren(children);

        dto.setOnlyApplicableIf(child.getOnlyApplicableIf());

        dto.setInapplicableIf(child.getInapplicableIf());

        dto.setTermType(child.getTermType());

        return dto;