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ResourceFactory.javaAPI DocApache Tomcat 6.0.146101Fri Jul 20 04:20:36 BST 2007org.apache.naming.factory

ResourceFactory

public class ResourceFactory extends Object implements ObjectFactory
Object factory for Resources.
author
Remy Maucherat
version
$Revision: 467222 $ $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $

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)
Crete a new DataSource instance.

param
obj The reference object describing the DataSource

        
        if (obj instanceof ResourceRef) {
            Reference ref = (Reference) obj;
            ObjectFactory factory = null;
            RefAddr factoryRefAddr = ref.get(Constants.FACTORY);
            if (factoryRefAddr != null) {
                // Using the specified factory
                String factoryClassName = 
                    factoryRefAddr.getContent().toString();
                // Loading factory
                ClassLoader tcl = 
                    Thread.currentThread().getContextClassLoader();
                Class factoryClass = null;
                if (tcl != null) {
                    try {
                        factoryClass = tcl.loadClass(factoryClassName);
                    } catch(ClassNotFoundException e) {
                        NamingException ex = new NamingException
                            ("Could not load resource factory class");
                        ex.initCause(e);
                        throw ex;
                    }
                } else {
                    try {
                        factoryClass = Class.forName(factoryClassName);
                    } catch(ClassNotFoundException e) {
                        NamingException ex = new NamingException
                            ("Could not load resource factory class");
                        ex.initCause(e);
                        throw ex;
                    }
                }
                if (factoryClass != null) {
                    try {
                        factory = (ObjectFactory) factoryClass.newInstance();
                    } catch (Throwable t) {
                        if (t instanceof NamingException)
                            throw (NamingException) t;
                        NamingException ex = new NamingException
                            ("Could not create resource factory instance");
                        ex.initCause(t);
                        throw ex;
                    }
                }
            } else {
                if (ref.getClassName().equals("javax.sql.DataSource")) {
                    String javaxSqlDataSourceFactoryClassName =
                        System.getProperty("javax.sql.DataSource.Factory",
                                           Constants.DBCP_DATASOURCE_FACTORY);
                    try {
                        factory = (ObjectFactory) 
                            Class.forName(javaxSqlDataSourceFactoryClassName)
                            .newInstance();
                    } catch (Throwable t) {
                        NamingException ex = new NamingException
                            ("Could not create resource factory instance");
                        ex.initCause(t);
                        throw ex;
                    }
                } else if (ref.getClassName().equals("javax.mail.Session")) {
                    String javaxMailSessionFactoryClassName =
                        System.getProperty("javax.mail.Session.Factory",
                                           "org.apache.naming.factory.MailSessionFactory");
                    try {
                        factory = (ObjectFactory) 
                            Class.forName(javaxMailSessionFactoryClassName)
                            .newInstance();
                    } catch(Throwable t) {
                        NamingException ex = new NamingException
                            ("Could not create resource factory instance");
                        ex.initCause(t);
                        throw ex;
                    }
                }
            }
            if (factory != null) {
                return factory.getObjectInstance
                    (obj, name, nameCtx, environment);
            } else {
                throw new NamingException
                    ("Cannot create resource instance");
            }
        }
        
        return null;