private String getEdgeString(FeatureTree tree, TreeNode parentNode) {
StringBuilder sb = new StringBuilder();
for (TreeNode child : parentNode.getChildren()) {
if (child.getCost() != 0) {
sb.append(getNodeTypeAndDatabaseIdString(tree, parentNode));
sb.append(getNodeTypeAndDatabaseIdString(tree, child));
String value = String.valueOf(child.getValueOfCandidateFeature());
value = fixPlusAndMinusSigns(value);
EdgeLabels.FEATURE_VALUE.setAttributeValue(value);
sb.append(EdgeLabels.FEATURE_VALUE.getDefaultValueString());
sb.append(EdgeLabels.FEATURE_VALUE.toString());
value = String.valueOf(parentNode.getAppliedCandidate());
value = fixPlusAndMinusSigns(value);
EdgeLabels.CANDIDATE_USED.setAttributeValue(value);
sb.append(EdgeLabels.CANDIDATE_USED.toString());
sb.append("\n");
}
}
return sb.toString();
}
