package com.fasterxml.jackson.module.jaxb.deser;
import java.io.IOException;
import java.util.Iterator;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.node.ArrayNode;
/**
* @author Ryan Heaton
*/
public class DomElementJsonDeserializer
extends StdDeserializer<Element>
{
private final DocumentBuilder builder;
public DomElementJsonDeserializer()
{
super(Element.class);
try {
DocumentBuilderFactory bf = DocumentBuilderFactory.newInstance();
bf.setNamespaceAware(true);
builder = bf.newDocumentBuilder();
} catch (ParserConfigurationException e) {
throw new RuntimeException();
}
}
public DomElementJsonDeserializer(DocumentBuilder builder)
{
super(Element.class);
this.builder = builder;
}
@Override
public Element deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException
{
Document document = builder.newDocument();
JsonNode root = jp.readValueAsTree();
return fromNode(document, root);
}
protected Element fromNode(Document document, JsonNode jsonNode)
throws IOException
{
String ns = jsonNode.get("namespace") != null ? jsonNode.get("namespace").asText() : null;
String name = jsonNode.get("name") != null ? jsonNode.get("name").asText() : null;
if (name == null) {
throw new JsonMappingException("No name for DOM element was provided in the JSON object.");
}
Element element = document.createElementNS(ns, name);
JsonNode attributesNode = jsonNode.get("attributes");
if (attributesNode != null && attributesNode instanceof ArrayNode) {
Iterator<JsonNode> atts = attributesNode.elements();
while (atts.hasNext()) {
JsonNode node = atts.next();
ns = node.get("namespace") != null ? node.get("namespace").asText() : null;
name = node.get("name") != null ? node.get("name").asText() : null;
String value = node.get("$") != null ? node.get("$").asText() : null;
if (name != null) {
element.setAttributeNS(ns, name, value);
}
}
}
JsonNode childsNode = jsonNode.get("children");
if (childsNode != null && childsNode instanceof ArrayNode) {
Iterator<JsonNode> els = childsNode.elements();
while (els.hasNext()) {
JsonNode node = els.next();
name = node.get("name") != null ? node.get("name").asText() : null;
String value = node.get("$") != null ? node.get("$").asText() : null;
if (value != null) {
element.appendChild(document.createTextNode(value));
}
else if (name != null) {
element.appendChild(fromNode(document, node));
}
}
}
return element;
}
}