Mercurial > jdk8-mips64-public > jaxws / file revision

 /*

  * Copyright (c) 2013, 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 com.sun.xml.internal.org.jvnet.mimepull;

 import java.io.File;

 import java.io.IOException;

 import java.lang.reflect.Array;

 import java.lang.reflect.InvocationTargetException;

 import java.lang.reflect.Method;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 /**

  * Helper utility to support jdk <= jdk1.6. After jdk1.6 EOL reflection can be removed and API can be used directly.

  */

 class TempFiles {

     private static final Logger LOGGER = Logger.getLogger(TempFiles.class.getName());

     private static final Class<?> CLASS_FILES;

     private static final Class<?> CLASS_PATH;

     private static final Class<?> CLASS_FILE_ATTRIBUTE;

     private static final Class<?> CLASS_FILE_ATTRIBUTES;

     private static final Method METHOD_FILE_TO_PATH;

     private static final Method METHOD_FILES_CREATE_TEMP_FILE;

     private static final Method METHOD_FILES_CREATE_TEMP_FILE_WITHPATH;

     private static final Method METHOD_PATH_TO_FILE;

     private static boolean useJdk6API;

     static {

         useJdk6API = isJdk6();

         CLASS_FILES = safeGetClass("java.nio.file.Files");

         CLASS_PATH = safeGetClass("java.nio.file.Path");

         CLASS_FILE_ATTRIBUTE = safeGetClass("java.nio.file.attribute.FileAttribute");

         CLASS_FILE_ATTRIBUTES = safeGetClass("[Ljava.nio.file.attribute.FileAttribute;");

         METHOD_FILE_TO_PATH = safeGetMethod(File.class, "toPath");

         METHOD_FILES_CREATE_TEMP_FILE = safeGetMethod(CLASS_FILES, "createTempFile", String.class, String.class, CLASS_FILE_ATTRIBUTES);

         METHOD_FILES_CREATE_TEMP_FILE_WITHPATH = safeGetMethod(CLASS_FILES, "createTempFile", CLASS_PATH, String.class, String.class, CLASS_FILE_ATTRIBUTES);

         METHOD_PATH_TO_FILE = safeGetMethod(CLASS_PATH, "toFile");

     }

     private static boolean isJdk6() {

         String javaVersion = System.getProperty("java.version");

         LOGGER.log(Level.FINEST, "Detected java version = {0}", javaVersion);

         return javaVersion.startsWith("1.6.");

     }

     private static Class<?> safeGetClass(String className) {

         // it is jdk 6 or something failed already before

         if (useJdk6API) return null;

         try {

             return Class.forName(className);

         } catch (ClassNotFoundException e) {

             LOGGER.log(Level.SEVERE, "Exception cought", e);

             LOGGER.log(Level.WARNING, "Class {0} not found. Temp files will be created using old java.io API.", className);

             useJdk6API = true;

             return null;

         }

     }

     private static Method safeGetMethod(Class<?> clazz, String methodName, Class<?>... parameterTypes) {

         // it is jdk 6 or something failed already before

         if (useJdk6API) return null;

         try {

             return clazz.getMethod(methodName, parameterTypes);

         } catch (NoSuchMethodException e) {

             LOGGER.log(Level.SEVERE, "Exception cought", e);

             LOGGER.log(Level.WARNING, "Method {0} not found. Temp files will be created using old java.io API.", methodName);

             useJdk6API = true;

             return null;

         }

     }

     static Object toPath(File f) throws InvocationTargetException, IllegalAccessException {

         return METHOD_FILE_TO_PATH.invoke(f);

     }

     static File toFile(Object path) throws InvocationTargetException, IllegalAccessException {

         return (File) METHOD_PATH_TO_FILE.invoke(path);

     }

     static File createTempFile(String prefix, String suffix, File dir) throws IOException {

         if (useJdk6API) {

             LOGGER.log(Level.FINEST, "Jdk6 detected, temp file (prefix:{0}, suffix:{1}) being created using old java.io API.", new Object[]{prefix, suffix});

             return File.createTempFile(prefix, suffix, dir);

         } else {

             try {

                 if (dir != null) {

                     Object path = toPath(dir);

                     LOGGER.log(Level.FINEST, "Temp file (path: {0}, prefix:{1}, suffix:{2}) being created using NIO API.", new Object[]{dir.getAbsolutePath(), prefix, suffix});

                     return toFile(METHOD_FILES_CREATE_TEMP_FILE_WITHPATH.invoke(null, path, prefix, suffix, Array.newInstance(CLASS_FILE_ATTRIBUTE, 0)));

                 } else {

                     LOGGER.log(Level.FINEST, "Temp file (prefix:{0}, suffix:{1}) being created using NIO API.", new Object[]{prefix, suffix});

                     return toFile(METHOD_FILES_CREATE_TEMP_FILE.invoke(null, prefix, suffix, Array.newInstance(CLASS_FILE_ATTRIBUTE, 0)));

                 }

             } catch (IllegalAccessException e) {

                 LOGGER.log(Level.SEVERE, "Exception caught", e);

                 LOGGER.log(Level.WARNING, "Error invoking java.nio API, temp file (path: {0}, prefix:{1}, suffix:{2}) being created using old java.io API.",

                         new Object[]{dir != null ? dir.getAbsolutePath() : null, prefix, suffix});

                 return File.createTempFile(prefix, suffix, dir);

             } catch (InvocationTargetException e) {

                 LOGGER.log(Level.SEVERE, "Exception caught", e);

                 LOGGER.log(Level.WARNING, "Error invoking java.nio API, temp file (path: {0}, prefix:{1}, suffix:{2}) being created using old java.io API.",

                         new Object[]{dir != null ? dir.getAbsolutePath() : null, prefix, suffix});

                 return File.createTempFile(prefix, suffix, dir);

             }

         }

     }

 }