| /* |
| * Copyright (c) 2004, 2017, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package javax.xml.soap; |
| |
| import java.io.*; |
| import java.nio.charset.StandardCharsets; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.util.Properties; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| |
| class FactoryFinder { |
| |
| private static final Logger logger = Logger.getLogger("javax.xml.soap"); |
| |
| private static final ServiceLoaderUtil.ExceptionHandler<SOAPException> EXCEPTION_HANDLER = |
| new ServiceLoaderUtil.ExceptionHandler<SOAPException>() { |
| @Override |
| public SOAPException createException(Throwable throwable, String message) { |
| return new SOAPException(message, throwable); |
| } |
| }; |
| |
| /** |
| * Finds the implementation {@code Class} object for the given |
| * factory type. If it fails and {@code tryFallback} is {@code true} |
| * finds the {@code Class} object for the given default class name. |
| * The arguments supplied must be used in order |
| * Note the default class name may be needed even if fallback |
| * is not to be attempted in order to check if requested type is fallback. |
| * <P> |
| * This method is package private so that this code can be shared. |
| * |
| * @return the {@code Class} object of the specified message factory; |
| * may not be {@code null} |
| * |
| * @param factoryClass factory abstract class or interface to be found |
| * @param deprecatedFactoryId deprecated name of a factory; it is used for types |
| * where class name is different from a name |
| * being searched (in previous spec). |
| * @param defaultClassName the implementation class name, which is |
| * to be used only if nothing else |
| * is found; {@code null} to indicate |
| * that there is no default class name |
| * @param tryFallback whether to try the default class as a |
| * fallback |
| * @exception SOAPException if there is a SOAP error |
| */ |
| @SuppressWarnings("unchecked") |
| static <T> T find(Class<T> factoryClass, |
| String defaultClassName, |
| boolean tryFallback, String deprecatedFactoryId) throws SOAPException { |
| |
| ClassLoader tccl = ServiceLoaderUtil.contextClassLoader(EXCEPTION_HANDLER); |
| String factoryId = factoryClass.getName(); |
| |
| // Use the system property first |
| String className = fromSystemProperty(factoryId, deprecatedFactoryId); |
| if (className != null) { |
| Object result = newInstance(className, defaultClassName, tccl); |
| if (result != null) { |
| return (T) result; |
| } |
| } |
| |
| // try to read from $java.home/lib/jaxm.properties |
| className = fromJDKProperties(factoryId, deprecatedFactoryId); |
| if (className != null) { |
| Object result = newInstance(className, defaultClassName, tccl); |
| if (result != null) { |
| return (T) result; |
| } |
| } |
| |
| // standard services: java.util.ServiceLoader |
| T factory = ServiceLoaderUtil.firstByServiceLoader( |
| factoryClass, |
| logger, |
| EXCEPTION_HANDLER); |
| if (factory != null) { |
| return factory; |
| } |
| |
| // try to find services in CLASSPATH |
| className = fromMetaInfServices(deprecatedFactoryId, tccl); |
| if (className != null) { |
| logger.log(Level.WARNING, |
| "Using deprecated META-INF/services mechanism with non-standard property: {0}. " + |
| "Property {1} should be used instead.", |
| new Object[]{deprecatedFactoryId, factoryId}); |
| Object result = newInstance(className, defaultClassName, tccl); |
| if (result != null) { |
| return (T) result; |
| } |
| } |
| |
| // If not found and fallback should not be tried, return a null result. |
| if (!tryFallback) |
| return null; |
| |
| // We didn't find the class through the usual means so try the default |
| // (built in) factory if specified. |
| if (defaultClassName == null) { |
| throw new SOAPException( |
| "Provider for " + factoryId + " cannot be found", null); |
| } |
| return (T) newInstance(defaultClassName, defaultClassName, tccl); |
| } |
| |
| // in most cases there is no deprecated factory id |
| static <T> T find(Class<T> factoryClass, |
| String defaultClassName, |
| boolean tryFallback) throws SOAPException { |
| return find(factoryClass, defaultClassName, tryFallback, null); |
| } |
| |
| private static Object newInstance(String className, String defaultClassName, ClassLoader tccl) throws SOAPException { |
| return ServiceLoaderUtil.newInstance( |
| className, |
| defaultClassName, |
| tccl, |
| EXCEPTION_HANDLER); |
| } |
| |
| // used only for deprecatedFactoryId; |
| // proper factoryId searched by java.util.ServiceLoader |
| private static String fromMetaInfServices(String deprecatedFactoryId, ClassLoader tccl) { |
| String serviceId = "META-INF/services/" + deprecatedFactoryId; |
| logger.log(Level.FINE, "Checking deprecated {0} resource", serviceId); |
| |
| try (InputStream is = |
| tccl == null ? |
| ClassLoader.getSystemResourceAsStream(serviceId) |
| : |
| tccl.getResourceAsStream(serviceId)) { |
| |
| if (is != null) { |
| String factoryClassName; |
| try (InputStreamReader isr = new InputStreamReader(is, StandardCharsets.UTF_8); |
| BufferedReader rd = new BufferedReader(isr)) { |
| factoryClassName = rd.readLine(); |
| } |
| |
| logFound(factoryClassName); |
| if (factoryClassName != null && !"".equals(factoryClassName)) { |
| return factoryClassName; |
| } |
| } |
| |
| } catch (IOException e) { |
| // keep original behavior |
| } |
| return null; |
| } |
| |
| private static String fromJDKProperties(String factoryId, String deprecatedFactoryId) { |
| Path path = null; |
| try { |
| String JAVA_HOME = getSystemProperty("java.home"); |
| path = Paths.get(JAVA_HOME, "conf", "jaxm.properties"); |
| logger.log(Level.FINE, "Checking configuration in {0}", path); |
| |
| // to ensure backwards compatibility |
| if (!Files.exists(path)) { |
| path = Paths.get(JAVA_HOME, "lib", "jaxm.properties"); |
| } |
| |
| logger.log(Level.FINE, "Checking configuration in {0}", path); |
| if (Files.exists(path)) { |
| Properties props = new Properties(); |
| try (InputStream inputStream = Files.newInputStream(path)) { |
| props.load(inputStream); |
| } |
| |
| // standard property |
| logger.log(Level.FINE, "Checking property {0}", factoryId); |
| String factoryClassName = props.getProperty(factoryId); |
| logFound(factoryClassName); |
| if (factoryClassName != null) { |
| return factoryClassName; |
| } |
| |
| // deprecated property |
| if (deprecatedFactoryId != null) { |
| logger.log(Level.FINE, "Checking deprecated property {0}", deprecatedFactoryId); |
| factoryClassName = props.getProperty(deprecatedFactoryId); |
| logFound(factoryClassName); |
| if (factoryClassName != null) { |
| logger.log(Level.WARNING, |
| "Using non-standard property: {0}. Property {1} should be used instead.", |
| new Object[]{deprecatedFactoryId, factoryId}); |
| return factoryClassName; |
| } |
| } |
| } |
| } catch (Exception ignored) { |
| logger.log(Level.SEVERE, "Error reading SAAJ configuration from [" + path + |
| "] file. Check it is accessible and has correct format.", ignored); |
| } |
| return null; |
| } |
| |
| private static String fromSystemProperty(String factoryId, String deprecatedFactoryId) { |
| String systemProp = getSystemProperty(factoryId); |
| if (systemProp != null) { |
| return systemProp; |
| } |
| if (deprecatedFactoryId != null) { |
| systemProp = getSystemProperty(deprecatedFactoryId); |
| if (systemProp != null) { |
| logger.log(Level.WARNING, |
| "Using non-standard property: {0}. Property {1} should be used instead.", |
| new Object[] {deprecatedFactoryId, factoryId}); |
| return systemProp; |
| } |
| } |
| return null; |
| } |
| |
| private static String getSystemProperty(final String property) { |
| logger.log(Level.FINE, "Checking system property {0}", property); |
| String value = AccessController.doPrivileged(new PrivilegedAction<String>() { |
| @Override |
| public String run() { |
| return System.getProperty(property); |
| } |
| }); |
| logFound(value); |
| return value; |
| } |
| |
| private static void logFound(String value) { |
| if (value != null) { |
| logger.log(Level.FINE, " found {0}", value); |
| } else { |
| logger.log(Level.FINE, " not found"); |
| } |
| } |
| |
| } |