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BeanFactory.javaAPI DocApache Tomcat 6.0.149862Fri Jul 20 04:20:36 BST 2007org.apache.naming.factory

BeanFactory

public class BeanFactory extends Object implements ObjectFactory
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

Fields Summary
Constructors Summary
Methods Summary
public java.lang.ObjectgetObjectInstance(java.lang.Object obj, javax.naming.Name name, javax.naming.Context nameCtx, java.util.Hashtable environment)
Create a new Bean instance.

param
obj The reference object describing the Bean


        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) {
                    }
                } else {
                    try {
                        beanClass = Class.forName(beanClassName);
                    } catch(ClassNotFoundException e) {
                        e.printStackTrace();
                    }
                }
                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 = (RefAddr) 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<pda.length; i++) {

                        if (pda[i].getName().equals(propName)) {

                            Class propType = pda[i].getPropertyType();

                            if (propType.equals(String.class)) {
                                valueArray[0] = value;
                            } else if (propType.equals(Character.class) 
                                       || propType.equals(char.class)) {
                                valueArray[0] = new Character(value.charAt(0));
                            } else if (propType.equals(Byte.class) 
                                       || propType.equals(byte.class)) {
                                valueArray[0] = new Byte(value);
                            } else if (propType.equals(Short.class) 
                                       || propType.equals(short.class)) {
                                valueArray[0] = new Short(value);
                            } else if (propType.equals(Integer.class) 
                                       || propType.equals(int.class)) {
                                valueArray[0] = new Integer(value);
                            } else if (propType.equals(Long.class) 
                                       || propType.equals(long.class)) {
                                valueArray[0] = new Long(value);
                            } else if (propType.equals(Float.class) 
                                       || propType.equals(float.class)) {
                                valueArray[0] = new Float(value);
                            } else if (propType.equals(Double.class) 
                                       || propType.equals(double.class)) {
                                valueArray[0] = new Double(value);
                            } else if (propType.equals(Boolean.class)
                                       || propType.equals(boolean.class)) {
                                valueArray[0] = new Boolean(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) {
                NamingException ne = new NamingException(ie.getMessage());
                ne.setRootCause(ie);
                throw ne;
            } catch (java.lang.IllegalAccessException iae) {
                NamingException ne = new NamingException(iae.getMessage());
                ne.setRootCause(iae);
                throw ne;
            } catch (java.lang.InstantiationException ie2) {
                NamingException ne = new NamingException(ie2.getMessage());
                ne.setRootCause(ie2);
                throw ne;
            } catch (java.lang.reflect.InvocationTargetException ite) {
                NamingException ne = new NamingException(ite.getMessage());
                ne.setRootCause(ite);
                throw ne;
            }

        } else {
            return null;
        }