dircontextfactory.java

来自「struts框架的jsf组件的核心实用例子集合」· Java 代码 · 共 36 行

package com.corejsf;

import java.util.Enumeration;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.NamingException;
import javax.naming.RefAddr;
import javax.naming.Reference;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.naming.spi.ObjectFactory;

public class DirContextFactory implements ObjectFactory {
   public Object getObjectInstance(Object obj,
      Name n, Context nameCtx, Hashtable environment)
      throws NamingException {

      Hashtable env = new Hashtable();
      String url = null;
      Reference ref = (Reference) obj;
      Enumeration addrs = ref.getAll();
      while (addrs.hasMoreElements()) {
          RefAddr addr = (RefAddr) addrs.nextElement();
          String name = addr.getType();
          String value = (String) addr.getContent();
          if (name.equals("URL")) url = value;
          else env.put(name, value);
      }
      DirContext initial = new InitialDirContext(env);
      if (url == null) return initial;
      else return initial.lookup(url);
   }
}