src/share/jaf_classes/javax/activation/FileTypeMap.java

Tue, 06 Mar 2012 16:09:35 -0800

author
ohair
date
Tue, 06 Mar 2012 16:09:35 -0800
changeset 286
f50545b5e2f1
child 494
2fcd3ddb57a6
permissions
-rw-r--r--

7150322: Stop using drop source bundles in jaxws
Reviewed-by: darcy, ohrstrom

ohair@286 1 /*
ohair@286 2 * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved.
ohair@286 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ohair@286 4 *
ohair@286 5 * This code is free software; you can redistribute it and/or modify it
ohair@286 6 * under the terms of the GNU General Public License version 2 only, as
ohair@286 7 * published by the Free Software Foundation. Oracle designates this
ohair@286 8 * particular file as subject to the "Classpath" exception as provided
ohair@286 9 * by Oracle in the LICENSE file that accompanied this code.
ohair@286 10 *
ohair@286 11 * This code is distributed in the hope that it will be useful, but WITHOUT
ohair@286 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ohair@286 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
ohair@286 14 * version 2 for more details (a copy is included in the LICENSE file that
ohair@286 15 * accompanied this code).
ohair@286 16 *
ohair@286 17 * You should have received a copy of the GNU General Public License version
ohair@286 18 * 2 along with this work; if not, write to the Free Software Foundation,
ohair@286 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ohair@286 20 *
ohair@286 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@286 22 * or visit www.oracle.com if you need additional information or have any
ohair@286 23 * questions.
ohair@286 24 */
ohair@286 25
ohair@286 26 package javax.activation;
ohair@286 27
ohair@286 28 import java.io.File;
ohair@286 29
ohair@286 30 /**
ohair@286 31 * The FileTypeMap is an abstract class that provides a data typing
ohair@286 32 * interface for files. Implementations of this class will
ohair@286 33 * implement the getContentType methods which will derive a content
ohair@286 34 * type from a file name or a File object. FileTypeMaps could use any
ohair@286 35 * scheme to determine the data type, from examining the file extension
ohair@286 36 * of a file (like the MimetypesFileTypeMap) to opening the file and
ohair@286 37 * trying to derive its type from the contents of the file. The
ohair@286 38 * FileDataSource class uses the default FileTypeMap (a MimetypesFileTypeMap
ohair@286 39 * unless changed) to determine the content type of files.
ohair@286 40 *
ohair@286 41 * @see javax.activation.FileTypeMap
ohair@286 42 * @see javax.activation.FileDataSource
ohair@286 43 * @see javax.activation.MimetypesFileTypeMap
ohair@286 44 *
ohair@286 45 * @since 1.6
ohair@286 46 */
ohair@286 47
ohair@286 48 public abstract class FileTypeMap {
ohair@286 49
ohair@286 50 private static FileTypeMap defaultMap = null;
ohair@286 51
ohair@286 52 /**
ohair@286 53 * The default constructor.
ohair@286 54 */
ohair@286 55 public FileTypeMap() {
ohair@286 56 super();
ohair@286 57 }
ohair@286 58
ohair@286 59 /**
ohair@286 60 * Return the type of the file object. This method should
ohair@286 61 * always return a valid MIME type.
ohair@286 62 *
ohair@286 63 * @param file A file to be typed.
ohair@286 64 * @return The content type.
ohair@286 65 */
ohair@286 66 abstract public String getContentType(File file);
ohair@286 67
ohair@286 68 /**
ohair@286 69 * Return the type of the file passed in. This method should
ohair@286 70 * always return a valid MIME type.
ohair@286 71 *
ohair@286 72 * @param filename the pathname of the file.
ohair@286 73 * @return The content type.
ohair@286 74 */
ohair@286 75 abstract public String getContentType(String filename);
ohair@286 76
ohair@286 77 /**
ohair@286 78 * Sets the default FileTypeMap for the system. This instance
ohair@286 79 * will be returned to callers of getDefaultFileTypeMap.
ohair@286 80 *
ohair@286 81 * @param map The FileTypeMap.
ohair@286 82 * @exception SecurityException if the caller doesn't have permission
ohair@286 83 * to change the default
ohair@286 84 */
ohair@286 85 public static void setDefaultFileTypeMap(FileTypeMap map) {
ohair@286 86 SecurityManager security = System.getSecurityManager();
ohair@286 87 if (security != null) {
ohair@286 88 try {
ohair@286 89 // if it's ok with the SecurityManager, it's ok with me...
ohair@286 90 security.checkSetFactory();
ohair@286 91 } catch (SecurityException ex) {
ohair@286 92 // otherwise, we also allow it if this code and the
ohair@286 93 // factory come from the same class loader (e.g.,
ohair@286 94 // the JAF classes were loaded with the applet classes).
ohair@286 95 if (FileTypeMap.class.getClassLoader() !=
ohair@286 96 map.getClass().getClassLoader())
ohair@286 97 throw ex;
ohair@286 98 }
ohair@286 99 }
ohair@286 100 defaultMap = map;
ohair@286 101 }
ohair@286 102
ohair@286 103 /**
ohair@286 104 * Return the default FileTypeMap for the system.
ohair@286 105 * If setDefaultFileTypeMap was called, return
ohair@286 106 * that instance, otherwise return an instance of
ohair@286 107 * <code>MimetypesFileTypeMap</code>.
ohair@286 108 *
ohair@286 109 * @return The default FileTypeMap
ohair@286 110 * @see javax.activation.FileTypeMap#setDefaultFileTypeMap
ohair@286 111 */
ohair@286 112 public static FileTypeMap getDefaultFileTypeMap() {
ohair@286 113 // XXX - probably should be synchronized
ohair@286 114 if (defaultMap == null)
ohair@286 115 defaultMap = new MimetypesFileTypeMap();
ohair@286 116 return defaultMap;
ohair@286 117 }
ohair@286 118 }

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