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package org.apache.naming.factory;

import java.util.Hashtable;
import java.util.Enumeration;
import javax.naming.Name;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.Reference;
import javax.naming.RefAddr;
import javax.naming.spi.ObjectFactory;
import org.apache.naming.ResourceRef;

import java.beans.Introspector;
import java.beans.BeanInfo;
import java.beans.PropertyDescriptor;

import java.lang.reflect.Method;

/**
 * Object factory for any Resource conforming to the JavaBean spec.
 * 
 * 

This factory can be configured in a <DefaultContext> * or <Context> element in your conf/server.xml * configuration file. An example of factory configuration is:

*
 * <Resource name="jdbc/myDataSource" auth="SERVLET"
 *   type="oracle.jdbc.pool.OracleConnectionCacheImpl"/>
 * <ResourceParams name="jdbc/myDataSource">
 *   <parameter>
 *     <name>factory</name>
 *     <value>org.apache.naming.factory.BeanFactory</value>
 *   </parameter>
 *   <parameter>
 *     <name>driverType</name>
 *     <value>thin</value>
 *   </parameter>
 *   <parameter>
 *     <name>serverName</name>
 *     <value>hue</value>
 *   </parameter>
 *   <parameter>
 *     <name>networkProtocol</name>
 *     <value>tcp</value>
 *   </parameter> 
 *   <parameter>
 *     <name>databaseName</name>
 *     <value>XXXX</value>
 *   </parameter>
 *   <parameter>
 *     <name>portNumber</name>
 *     <value>NNNN</value>
 *   </parameter>
 *   <parameter>
 *     <name>user</name>
 *     <value>XXXX</value>
 *   </parameter>
 *   <parameter>
 *     <name>password</name>
 *     <value>XXXX</value>
 *   </parameter>
 *   <parameter>
 *     <name>maxLimit</name>
 *     <value>5</value>
 *   </parameter>
 * </ResourceParams>
 * 
* * @author Aner Perez */ public class BeanFactory implements ObjectFactory { // ----------------------------------------------------------- Constructors // -------------------------------------------------------------- Constants // ----------------------------------------------------- Instance Variables // --------------------------------------------------------- Public Methods // -------------------------------------------------- ObjectFactory Methods /** * Create a new Bean instance. * * @param obj The reference object describing the Bean */ public Object getObjectInstance(Object obj, Name name, Context nameCtx, Hashtable environment) throws NamingException { if (obj instanceof ResourceRef) { try { Reference ref = (Reference) obj; String beanClassName = ref.getClassName(); Class beanClass = null; ClassLoader tcl = Thread.currentThread().getContextClassLoader(); if (tcl != null) { try { beanClass = tcl.loadClass(beanClassName); } catch(ClassNotFoundException e) { throw (NamingException) new NamingException().initCause(e); } } else { try { beanClass = Class.forName(beanClassName); } catch(ClassNotFoundException e) { throw (NamingException) new NamingException().initCause(e); } } if (beanClass == null) { throw new NamingException ("Class not found: " + beanClassName); } BeanInfo bi = Introspector.getBeanInfo(beanClass); PropertyDescriptor[] pda = bi.getPropertyDescriptors(); Object bean = beanClass.newInstance(); Enumeration e = ref.getAll(); while (e.hasMoreElements()) { RefAddr ra = e.nextElement(); String propName = ra.getType(); if (propName.equals(Constants.FACTORY) || propName.equals("scope") || propName.equals("auth")) { continue; } String value = (String)ra.getContent(); Object[] valueArray = new Object[1]; int i = 0; for (i = 0; i propType = pda[i].getPropertyType(); if (propType.equals(String.class)) { valueArray[0] = value; } else if (propType.equals(Character.class) || propType.equals(char.class)) { valueArray[0] = Character.valueOf(value.charAt(0)); } else if (propType.equals(Byte.class) || propType.equals(byte.class)) { valueArray[0] = Byte.valueOf(value); } else if (propType.equals(Short.class) || propType.equals(short.class)) { valueArray[0] = Short.valueOf(value); } else if (propType.equals(Integer.class) || propType.equals(int.class)) { valueArray[0] = Integer.valueOf(value); } else if (propType.equals(Long.class) || propType.equals(long.class)) { valueArray[0] = Long.valueOf(value); } else if (propType.equals(Float.class) || propType.equals(float.class)) { valueArray[0] = Float.valueOf(value); } else if (propType.equals(Double.class) || propType.equals(double.class)) { valueArray[0] = Double.valueOf(value); } else { throw new NamingException ("String conversion for property type '" + propType.getName() + "' not available"); } Method setProp = pda[i].getWriteMethod(); if (setProp != null) { setProp.invoke(bean, valueArray); } else { throw new NamingException ("Write not allowed for property: " + propName); } break; } } if (i == pda.length) { throw new NamingException ("No set method found for property: " + propName); } } return bean; } catch (java.beans.IntrospectionException ie) { throw new NamingException(ie.getMessage()); } catch (java.lang.IllegalAccessException iae) { throw new NamingException(iae.getMessage()); } catch (java.lang.InstantiationException ie2) { throw new NamingException(ie2.getMessage()); } catch (java.lang.reflect.InvocationTargetException ite) { throw new NamingException(ite.getMessage()); } } else { return null; } } }




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