| /* |
| * 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); |
| } |
| } |
| |
| } |
| |
| |
| } |