| /* |
| * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| /* |
| * $Id: FactoryFinder.java,v 1.6 2005/04/05 22:28:12 mk125090 Exp $ |
| * $Revision: 1.6 $ |
| * $Date: 2005/04/05 22:28:12 $ |
| */ |
| |
| |
| |
| package javax.xml.soap; |
| |
| import java.io.*; |
| import java.util.Properties; |
| |
| |
| class FactoryFinder { |
| |
| /** |
| * Creates an instance of the specified class using the specified |
| * <code>ClassLoader</code> object. |
| * |
| * @exception SOAPException if the given class could not be found |
| * or could not be instantiated |
| */ |
| private static Object newInstance(String className, |
| ClassLoader classLoader) |
| throws SOAPException |
| { |
| try { |
| Class spiClass; |
| if (classLoader == null) { |
| spiClass = Class.forName(className); |
| } else { |
| spiClass = classLoader.loadClass(className); |
| } |
| return spiClass.newInstance(); |
| } catch (ClassNotFoundException x) { |
| throw new SOAPException( |
| "Provider " + className + " not found", x); |
| } catch (Exception x) { |
| throw new SOAPException( |
| "Provider " + className + " could not be instantiated: " + x, |
| x); |
| } |
| } |
| |
| /** |
| * Finds the implementation <code>Class</code> object for the given |
| * factory name, or null if that fails. |
| * <P> |
| * This method is package private so that this code can be shared. |
| * |
| * @return the <code>Class</code> object of the specified message factory; |
| * or <code>null</code> |
| * |
| * @param factoryId the name of the factory to find, which is |
| * a system property |
| * @exception SOAPException if there is a SOAP error |
| */ |
| static Object find(String factoryId) |
| throws SOAPException |
| { |
| ClassLoader classLoader; |
| try { |
| classLoader = Thread.currentThread().getContextClassLoader(); |
| } catch (Exception x) { |
| throw new SOAPException(x.toString(), x); |
| } |
| |
| // Use the system property first |
| try { |
| String systemProp = |
| System.getProperty( factoryId ); |
| if( systemProp!=null) { |
| return newInstance(systemProp, classLoader); |
| } |
| } catch (SecurityException se) { |
| } |
| |
| // try to read from $java.home/lib/jaxm.properties |
| try { |
| String javah=System.getProperty( "java.home" ); |
| String configFile = javah + File.separator + |
| "lib" + File.separator + "jaxm.properties"; |
| File f=new File( configFile ); |
| if( f.exists()) { |
| Properties props=new Properties(); |
| props.load( new FileInputStream(f)); |
| String factoryClassName = props.getProperty(factoryId); |
| return newInstance(factoryClassName, classLoader); |
| } |
| } catch(Exception ex ) { |
| } |
| |
| String serviceId = "META-INF/services/" + factoryId; |
| // try to find services in CLASSPATH |
| try { |
| InputStream is=null; |
| if (classLoader == null) { |
| is=ClassLoader.getSystemResourceAsStream(serviceId); |
| } else { |
| is=classLoader.getResourceAsStream(serviceId); |
| } |
| |
| if( is!=null ) { |
| BufferedReader rd = |
| new BufferedReader(new InputStreamReader(is, "UTF-8")); |
| |
| String factoryClassName = rd.readLine(); |
| rd.close(); |
| |
| if (factoryClassName != null && |
| ! "".equals(factoryClassName)) { |
| return newInstance(factoryClassName, classLoader); |
| } |
| } |
| } catch( Exception ex ) { |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Finds the implementation <code>Class</code> object for the given |
| * factory name, or if that fails, finds the <code>Class</code> object |
| * for the given fallback class name. The arguments supplied must be |
| * used in order. If using the first argument is successful, the second |
| * one will not be used. |
| * <P> |
| * This method is package private so that this code can be shared. |
| * |
| * @return the <code>Class</code> object of the specified message factory; |
| * may not be <code>null</code> |
| * |
| * @param factoryId the name of the factory to find, which is |
| * a system property |
| * @param fallbackClassName the implementation class name, which is |
| * to be used only if nothing else |
| * is found; <code>null</code> to indicate that |
| * there is no fallback class name |
| * @exception SOAPException if there is a SOAP error |
| */ |
| static Object find(String factoryId, String fallbackClassName) |
| throws SOAPException |
| { |
| |
| Object obj = find(factoryId); |
| if (obj != null) |
| return obj; |
| |
| ClassLoader classLoader; |
| try { |
| classLoader = Thread.currentThread().getContextClassLoader(); |
| } catch (Exception x) { |
| throw new SOAPException(x.toString(), x); |
| } |
| |
| if (fallbackClassName == null) { |
| throw new SOAPException( |
| "Provider for " + factoryId + " cannot be found", null); |
| } |
| |
| return newInstance(fallbackClassName, classLoader); |
| } |
| } |