JNDI_Value.java

package org.nutz.ioc.val;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import org.nutz.ioc.IocMaking;
import org.nutz.ioc.ValueProxy;
import org.nutz.lang.Lang;

/**
 * 通过JNDI查找相应的对象
 * @author wendal(wendal1985@gmail.com)
 *
 */
public class JNDI_Value implements ValueProxy{
    
    private String jndiName;
    private Context cntxt;
    
    public JNDI_Value(String jndiName) {
        this.jndiName = jndiName;
    }

    public Object get(IocMaking ing) {
        try {
            if (cntxt == null)
                cntxt = (Context)new InitialContext().lookup("java:comp/env");
            return cntxt.lookup(jndiName);
        }
        catch (NamingException e) {
            try {
                return new InitialContext().lookup(jndiName);
            }
            catch (NamingException e2) {
                try {
                    return ((Context)new InitialContext().lookup("java:/comp/env")).lookup(jndiName);
                }
                catch (NamingException e3) {
                    throw Lang.wrapThrow(e3);
                }
            }
        }
    }

}