Wed, 27 Apr 2016 15:32:20 -0700
Added tag jdk8u102-b05 for changeset 1f512419ae33
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. Oracle designates this |
aoqi@0 | 8 | * particular file as subject to the "Classpath" exception as provided |
aoqi@0 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
aoqi@0 | 10 | * |
aoqi@0 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 15 | * accompanied this code). |
aoqi@0 | 16 | * |
aoqi@0 | 17 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 20 | * |
aoqi@0 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 22 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 23 | * questions. |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | package javax.activation; |
aoqi@0 | 27 | |
aoqi@0 | 28 | import java.io.InputStream; |
aoqi@0 | 29 | import java.io.OutputStream; |
aoqi@0 | 30 | import java.io.File; |
aoqi@0 | 31 | import java.io.FileDescriptor; |
aoqi@0 | 32 | import java.io.FileNotFoundException; |
aoqi@0 | 33 | import java.io.FileInputStream; |
aoqi@0 | 34 | import java.io.FileOutputStream; |
aoqi@0 | 35 | import java.io.IOException; |
aoqi@0 | 36 | import com.sun.activation.registries.MimeTypeFile; |
aoqi@0 | 37 | |
aoqi@0 | 38 | /** |
aoqi@0 | 39 | * The FileDataSource class implements a simple DataSource object |
aoqi@0 | 40 | * that encapsulates a file. It provides data typing services via |
aoqi@0 | 41 | * a FileTypeMap object. <p> |
aoqi@0 | 42 | * |
aoqi@0 | 43 | * <b>FileDataSource Typing Semantics</b><p> |
aoqi@0 | 44 | * |
aoqi@0 | 45 | * The FileDataSource class delegates data typing of files |
aoqi@0 | 46 | * to an object subclassed from the FileTypeMap class. |
aoqi@0 | 47 | * The <code>setFileTypeMap</code> method can be used to explicitly |
aoqi@0 | 48 | * set the FileTypeMap for an instance of FileDataSource. If no |
aoqi@0 | 49 | * FileTypeMap is set, the FileDataSource will call the FileTypeMap's |
aoqi@0 | 50 | * getDefaultFileTypeMap method to get the System's default FileTypeMap. |
aoqi@0 | 51 | * |
aoqi@0 | 52 | * @see javax.activation.DataSource |
aoqi@0 | 53 | * @see javax.activation.FileTypeMap |
aoqi@0 | 54 | * @see javax.activation.MimetypesFileTypeMap |
aoqi@0 | 55 | * |
aoqi@0 | 56 | * @since 1.6 |
aoqi@0 | 57 | */ |
aoqi@0 | 58 | public class FileDataSource implements DataSource { |
aoqi@0 | 59 | |
aoqi@0 | 60 | // keep track of original 'ref' passed in, non-null |
aoqi@0 | 61 | // one indicated which was passed in: |
aoqi@0 | 62 | private File _file = null; |
aoqi@0 | 63 | private FileTypeMap typeMap = null; |
aoqi@0 | 64 | |
aoqi@0 | 65 | /** |
aoqi@0 | 66 | * Creates a FileDataSource from a File object. <i>Note: |
aoqi@0 | 67 | * The file will not actually be opened until a method is |
aoqi@0 | 68 | * called that requires the file to be opened.</i> |
aoqi@0 | 69 | * |
aoqi@0 | 70 | * @param file the file |
aoqi@0 | 71 | */ |
aoqi@0 | 72 | public FileDataSource(File file) { |
aoqi@0 | 73 | _file = file; // save the file Object... |
aoqi@0 | 74 | } |
aoqi@0 | 75 | |
aoqi@0 | 76 | /** |
aoqi@0 | 77 | * Creates a FileDataSource from |
aoqi@0 | 78 | * the specified path name. <i>Note: |
aoqi@0 | 79 | * The file will not actually be opened until a method is |
aoqi@0 | 80 | * called that requires the file to be opened.</i> |
aoqi@0 | 81 | * |
aoqi@0 | 82 | * @param name the system-dependent file name. |
aoqi@0 | 83 | */ |
aoqi@0 | 84 | public FileDataSource(String name) { |
aoqi@0 | 85 | this(new File(name)); // use the file constructor |
aoqi@0 | 86 | } |
aoqi@0 | 87 | |
aoqi@0 | 88 | /** |
aoqi@0 | 89 | * This method will return an InputStream representing the |
aoqi@0 | 90 | * the data and will throw an IOException if it can |
aoqi@0 | 91 | * not do so. This method will return a new |
aoqi@0 | 92 | * instance of InputStream with each invocation. |
aoqi@0 | 93 | * |
aoqi@0 | 94 | * @return an InputStream |
aoqi@0 | 95 | */ |
aoqi@0 | 96 | public InputStream getInputStream() throws IOException { |
aoqi@0 | 97 | return new FileInputStream(_file); |
aoqi@0 | 98 | } |
aoqi@0 | 99 | |
aoqi@0 | 100 | /** |
aoqi@0 | 101 | * This method will return an OutputStream representing the |
aoqi@0 | 102 | * the data and will throw an IOException if it can |
aoqi@0 | 103 | * not do so. This method will return a new instance of |
aoqi@0 | 104 | * OutputStream with each invocation. |
aoqi@0 | 105 | * |
aoqi@0 | 106 | * @return an OutputStream |
aoqi@0 | 107 | */ |
aoqi@0 | 108 | public OutputStream getOutputStream() throws IOException { |
aoqi@0 | 109 | return new FileOutputStream(_file); |
aoqi@0 | 110 | } |
aoqi@0 | 111 | |
aoqi@0 | 112 | /** |
aoqi@0 | 113 | * This method returns the MIME type of the data in the form of a |
aoqi@0 | 114 | * string. This method uses the currently installed FileTypeMap. If |
aoqi@0 | 115 | * there is no FileTypeMap explictly set, the FileDataSource will |
aoqi@0 | 116 | * call the <code>getDefaultFileTypeMap</code> method on |
aoqi@0 | 117 | * FileTypeMap to acquire a default FileTypeMap. <i>Note: By |
aoqi@0 | 118 | * default, the FileTypeMap used will be a MimetypesFileTypeMap.</i> |
aoqi@0 | 119 | * |
aoqi@0 | 120 | * @return the MIME Type |
aoqi@0 | 121 | * @see javax.activation.FileTypeMap#getDefaultFileTypeMap |
aoqi@0 | 122 | */ |
aoqi@0 | 123 | public String getContentType() { |
aoqi@0 | 124 | // check to see if the type map is null? |
aoqi@0 | 125 | if (typeMap == null) |
aoqi@0 | 126 | return FileTypeMap.getDefaultFileTypeMap().getContentType(_file); |
aoqi@0 | 127 | else |
aoqi@0 | 128 | return typeMap.getContentType(_file); |
aoqi@0 | 129 | } |
aoqi@0 | 130 | |
aoqi@0 | 131 | /** |
aoqi@0 | 132 | * Return the <i>name</i> of this object. The FileDataSource |
aoqi@0 | 133 | * will return the file name of the object. |
aoqi@0 | 134 | * |
aoqi@0 | 135 | * @return the name of the object. |
aoqi@0 | 136 | * @see javax.activation.DataSource |
aoqi@0 | 137 | */ |
aoqi@0 | 138 | public String getName() { |
aoqi@0 | 139 | return _file.getName(); |
aoqi@0 | 140 | } |
aoqi@0 | 141 | |
aoqi@0 | 142 | /** |
aoqi@0 | 143 | * Return the File object that corresponds to this FileDataSource. |
aoqi@0 | 144 | * @return the File object for the file represented by this object. |
aoqi@0 | 145 | */ |
aoqi@0 | 146 | public File getFile() { |
aoqi@0 | 147 | return _file; |
aoqi@0 | 148 | } |
aoqi@0 | 149 | |
aoqi@0 | 150 | /** |
aoqi@0 | 151 | * Set the FileTypeMap to use with this FileDataSource |
aoqi@0 | 152 | * |
aoqi@0 | 153 | * @param map The FileTypeMap for this object. |
aoqi@0 | 154 | */ |
aoqi@0 | 155 | public void setFileTypeMap(FileTypeMap map) { |
aoqi@0 | 156 | typeMap = map; |
aoqi@0 | 157 | } |
aoqi@0 | 158 | } |