BeanFactory.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.naming.factory;
import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
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.spi.ObjectFactory;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.naming.ResourceRef;
import org.apache.naming.StringManager;
/**
* Object factory for any Resource conforming to the JavaBean spec.
*
* <p>This factory can be configured in a <code><Context></code> element
* in your <code>conf/server.xml</code>
* configuration file. An example of factory configuration is:</p>
* <pre>
* <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>
* </pre>
*
* @author Aner Perez [aner at ncstech.com]
*/
public class BeanFactory implements ObjectFactory {
private static final StringManager sm = StringManager.getManager(BeanFactory.class);
private final Log log = LogFactory.getLog(BeanFactory.class); // Not static
/**
* Create a new Bean instance.
*
* @param obj The reference object describing the Bean
*/
@Override
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();
try {
if (tcl != null) {
beanClass = tcl.loadClass(beanClassName);
} else {
beanClass = Class.forName(beanClassName);
}
} catch(ClassNotFoundException cnfe) {
NamingException ne = new NamingException(sm.getString("beanFactory.classNotFound", beanClassName));
ne.initCause(cnfe);
throw ne;
}
BeanInfo bi = Introspector.getBeanInfo(beanClass);
PropertyDescriptor[] pda = bi.getPropertyDescriptors();
Object bean = beanClass.getConstructor().newInstance();
// Look for the removed forceString option
RefAddr ra = ref.get("forceString");
if (ra != null) {
log.warn(sm.getString("beanFactory.noForceString"));
}
Enumeration<RefAddr> e = ref.getAll();
String value;
while (e.hasMoreElements()) {
ra = e.nextElement();
String propName = ra.getType();
if (propName.equals(Constants.FACTORY) ||
propName.equals("scope") || propName.equals("auth") ||
propName.equals("forceString") ||
propName.equals("singleton")) {
continue;
}
value = (String)ra.getContent();
Object[] valueArray = new Object[1];
int i = 0;
for (i = 0; i < pda.length; i++) {
if (pda[i].getName().equals(propName)) {
Class<?> propType = pda[i].getPropertyType();
Method setProp = pda[i].getWriteMethod();
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 if (propType.equals(Boolean.class) || propType.equals(boolean.class)) {
valueArray[0] = Boolean.valueOf(value);
} else if (setProp != null) {
// This is a Tomcat specific extension and is not part of the
// Java Bean specification.
String setterName = setProp.getName();
try {
setProp = bean.getClass().getMethod(setterName, String.class);
valueArray[0] = value;
} catch (NoSuchMethodException nsme) {
throw new NamingException(sm.getString(
"beanFactory.noStringConversion", propName, propType.getName()));
}
} else {
throw new NamingException(sm.getString(
"beanFactory.noStringConversion", propName, propType.getName()));
}
if (setProp != null) {
setProp.invoke(bean, valueArray);
} else {
throw new NamingException(sm.getString("beanFactory.readOnlyProperty", propName));
}
break;
}
}
if (i == pda.length) {
throw new NamingException(sm.getString("beanFactory.noSetMethod", propName));
}
}
return bean;
} catch (java.beans.IntrospectionException ie) {
NamingException ne = new NamingException(ie.getMessage());
ne.setRootCause(ie);
throw ne;
} catch (ReflectiveOperationException e) {
Throwable cause = e.getCause();
if (cause instanceof ThreadDeath) {
throw (ThreadDeath) cause;
}
if (cause instanceof VirtualMachineError) {
throw (VirtualMachineError) cause;
}
NamingException ne = new NamingException(e.getMessage());
ne.setRootCause(e);
throw ne;
}
} else {
return null;
}
}
}