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

comparison: src/share/jaf_classes/javax/activation/FileDataSource.java

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

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

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