VotingConfigProviderImpl.java

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package com.smartitengineering.user.security;

import java.io.InputStream;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import java.util.List;
import org.springframework.security.ConfigAttribute;
import org.springframework.security.acls.Permission;
import org.springframework.security.acls.domain.BasePermission;

/**
 *
 * @author modhu7
 */
public class VotingConfigProviderImpl implements VotingConfigProvider {

  private List<VotingConfig> listVotingConfig = new ArrayList<VotingConfig>();

  public VotingConfigProviderImpl(String xmlFileName) {
    try {
      InputStream votersStream = getClass().getClassLoader().getResourceAsStream(xmlFileName);
      DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
      DocumentBuilder db = dbf.newDocumentBuilder();
      Document doc = db.parse(votersStream);
      doc.getDocumentElement().normalize();
      NodeList nodeLst = doc.getElementsByTagName("voter");

      for (int s = 0; s < nodeLst.getLength(); s++) {

        Node voterNode = nodeLst.item(s);
        VotingConfig votingConfig = new VotingConfig();

        if (voterNode.getNodeType() == Node.ELEMENT_NODE) {

          Element voterElement = (Element) voterNode;

          NodeList permissionElementList = voterElement.getElementsByTagName("permission");
          Element permissionElement = (Element) permissionElementList.item(0);
          NodeList permissions = permissionElement.getChildNodes();
          String permission = ((Node) permissions.item(0)).getNodeValue();
          votingConfig.setRequirePermission(new Permission[]{BasePermission.buildFromMask(Integer.parseInt(permission))});

          NodeList roleList = voterElement.getElementsByTagName("role");
          Element roleElement = (Element) roleList.item(0);
          NodeList roles = roleElement.getChildNodes();
          String role = ((Node) roles.item(0)).getNodeValue();
          ConfigAttribute attribute = new ConfigAttributeImpl(role);
          votingConfig.setProcessConfigAttribute(attribute);


          listVotingConfig.add(votingConfig);
        }
      }

    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }

  @Override
  public List<VotingConfig> getVotingConfigList() {
    if (listVotingConfig == null) {
      return new ArrayList<VotingConfig>();
    }
    return listVotingConfig;
  }
}