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    • com.spun.util.io.xml.XmlExtractorUtil Maven / Gradle / Ivy

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    package com.spun.util.io.xml;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import java.util.ArrayList;

public class XmlExtractorUtil
{
  private XmlExtractorUtil()
  {
  } // Static class should not be instantiated
  public static Object[] extract(Node node, String xmlName, Class clazz)
  {
    ArrayList list = new ArrayList<>();
    extractAndTranslateForNode(traverseToTag("XML", node), list, XmlMapTranslator.get(ArrayList.class,
        new XmlMap[]{new XmlMap(xmlName, "add", new XmlMapExtractor(clazz))}));
    return list.toArray();
  }
  public static Node traverseToTag(String tag, Node node)
  {
    Node n = traverseToInnerTag(tag, node);
    if (n == null)
    { throw new NullPointerException(String.format("The Tag '%s' could not be found from '%s'", tag, node)); }
    return n;
  }
  private static Node traverseToInnerTag(String tag, Node node)
  {
    String name = node.getNodeName();
    if (name.equals(tag))
    {
      return node;
    }
    else
    {
      NodeList childNodes = node.getChildNodes();
      for (int i = 0; i < childNodes.getLength(); i++)
      {
        Node child = traverseToInnerTag(tag, childNodes.item(i));
        if (child != null)
        { return child; }
      }
    }
    return null;
  }
  public static Object extractAndTranslateForNode(Node node, Object addToObject, XmlTranslator translator)
  {
    NodeList childNodes = node.getChildNodes();
    for (int i = 0; i < childNodes.getLength(); i++)
    {
      if (childNodes.item(i).getNodeType() == Node.ELEMENT_NODE)
      {
        translator.extractAndTranslateForNode(childNodes.item(i), addToObject);
      }
    }
    return addToObject;
  }
}    
    
    
    

    




    
    
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