javax.xml.ws.spi.FactoryFinder Maven / Gradle / Ivy
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2005-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package javax.xml.ws.spi;
import java.io.InputStream;
import java.io.File;
import java.io.FileInputStream;
import java.util.Properties;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import javax.xml.ws.WebServiceException;
class FactoryFinder {
/**
* Creates an instance of the specified class using the specified
* ClassLoader object.
*
* @exception WebServiceException if the given class could not be found
* or could not be instantiated
*/
private static Object newInstance(String className,
ClassLoader classLoader)
{
try {
Class spiClass = safeLoadClass(className, classLoader);
return spiClass.newInstance();
} catch (ClassNotFoundException x) {
throw new WebServiceException(
"Provider " + className + " not found", x);
} catch (Exception x) {
throw new WebServiceException(
"Provider " + className + " could not be instantiated: " + x,
x);
}
}
/**
* Finds the implementation Class object for the given
* factory name, or if that fails, finds the Class 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.
*
* This method is package private so that this code can be shared.
*
* @return the Class object of the specified message factory;
* may not be null
*
* @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; null to indicate that
* there is no fallback class name
* @exception WebServiceException if there is an error
*/
static Object find(String factoryId, String fallbackClassName)
{
ClassLoader classLoader;
try {
classLoader = Thread.currentThread().getContextClassLoader();
} catch (Exception x) {
throw new WebServiceException(x.toString(), x);
}
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 ) {
}
// try to read from $java.home/lib/jaxws.properties
try {
String javah=System.getProperty( "java.home" );
String configFile = javah + File.separator +
"lib" + File.separator + "jaxws.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 ) {
}
// Use the system property
try {
String systemProp =
System.getProperty( factoryId );
if( systemProp!=null) {
return newInstance(systemProp, classLoader);
}
} catch (SecurityException se) {
}
if (fallbackClassName == null) {
throw new WebServiceException(
"Provider for " + factoryId + " cannot be found", null);
}
return newInstance(fallbackClassName, classLoader);
}
/**
* Loads the class, provided that the calling thread has an access to the class being loaded.
*/
private static Class safeLoadClass(String className, ClassLoader classLoader) throws ClassNotFoundException {
try {
// make sure that the current thread has an access to the package of the given name.
SecurityManager s = System.getSecurityManager();
if (s != null) {
int i = className.lastIndexOf('.');
if (i != -1) {
s.checkPackageAccess(className.substring(0, i));
}
}
if (classLoader == null)
return Class.forName(className);
else
return classLoader.loadClass(className);
} catch (SecurityException se) {
// anyone can access the platform default factory class without permission
if (Provider.DEFAULT_JAXWSPROVIDER.equals(className))
return Class.forName(className);
throw se;
}
}
}