Declared Entities

import java.io.StringReader;
import java.util.HashMap;
import java.util.Map;
/* ja v  a  2 s  . c  o  m*/
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Entity;
import org.w3c.dom.EntityReference;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;

public class Main {
  public static void main(String[] argv) throws Exception {
    InputSource is = new InputSource();
    is.setCharacterStream(new StringReader(xmlRecords));
    
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder();
    
    Document doc = db.parse(is);
    Map<String, Node> entityValues = new HashMap<String, Node>();
    getEntityValues(doc, entityValues);

    NamedNodeMap entities = doc.getDoctype().getEntities();
    for (int i = 0; i < entities.getLength(); i++) {
      Entity entity = (Entity) entities.item(i);
      System.out.println(entity);
      String entityName = entity.getNodeName();
      System.out.println(entityName);
      String entityPublicId = entity.getPublicId();
      System.out.println(entityPublicId);
      String entitySystemId = entity.getSystemId();
      System.out.println(entitySystemId);
      Node entityValue = (Node) entityValues.get(entityName);
      System.out.println(entityValue);
    }
  }

  public static void getEntityValues(Node node, Map<String, Node> map) {
    if (node instanceof EntityReference) {
      map.put(node.getNodeName(), node);
    }
    NodeList list = node.getChildNodes();
    for (int i = 0; i < list.getLength(); i++) {
      getEntityValues(list.item(i), map);
    }

  }
  static String xmlRecords = 
      "<!DOCTYPE sgml ["+
      "<!ENTITY publisher 'java2s.com'>"+
      "]>"+
      "<data>" +
      "  <employee>" +
      "    <name>Tom</name>"+ 
      "    <title>Manager</title>" +
      "  </employee>" +
      "  <employee>" +
      "    <name>&publisher;</name>"+ 
      "    <title>Programmer</title>" +
      "  </employee>" +
      "</data>";
}