1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/jaf_classes/javax/activation/FileDataSource.java Wed Apr 27 01:27:09 2016 +0800
1.3 @@ -0,0 +1,158 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package javax.activation;
1.30 +
1.31 +import java.io.InputStream;
1.32 +import java.io.OutputStream;
1.33 +import java.io.File;
1.34 +import java.io.FileDescriptor;
1.35 +import java.io.FileNotFoundException;
1.36 +import java.io.FileInputStream;
1.37 +import java.io.FileOutputStream;
1.38 +import java.io.IOException;
1.39 +import com.sun.activation.registries.MimeTypeFile;
1.40 +
1.41 +/**
1.42 + * The FileDataSource class implements a simple DataSource object
1.43 + * that encapsulates a file. It provides data typing services via
1.44 + * a FileTypeMap object. <p>
1.45 + *
1.46 + * <b>FileDataSource Typing Semantics</b><p>
1.47 + *
1.48 + * The FileDataSource class delegates data typing of files
1.49 + * to an object subclassed from the FileTypeMap class.
1.50 + * The <code>setFileTypeMap</code> method can be used to explicitly
1.51 + * set the FileTypeMap for an instance of FileDataSource. If no
1.52 + * FileTypeMap is set, the FileDataSource will call the FileTypeMap's
1.53 + * getDefaultFileTypeMap method to get the System's default FileTypeMap.
1.54 + *
1.55 + * @see javax.activation.DataSource
1.56 + * @see javax.activation.FileTypeMap
1.57 + * @see javax.activation.MimetypesFileTypeMap
1.58 + *
1.59 + * @since 1.6
1.60 + */
1.61 +public class FileDataSource implements DataSource {
1.62 +
1.63 + // keep track of original 'ref' passed in, non-null
1.64 + // one indicated which was passed in:
1.65 + private File _file = null;
1.66 + private FileTypeMap typeMap = null;
1.67 +
1.68 + /**
1.69 + * Creates a FileDataSource from a File object. <i>Note:
1.70 + * The file will not actually be opened until a method is
1.71 + * called that requires the file to be opened.</i>
1.72 + *
1.73 + * @param file the file
1.74 + */
1.75 + public FileDataSource(File file) {
1.76 + _file = file; // save the file Object...
1.77 + }
1.78 +
1.79 + /**
1.80 + * Creates a FileDataSource from
1.81 + * the specified path name. <i>Note:
1.82 + * The file will not actually be opened until a method is
1.83 + * called that requires the file to be opened.</i>
1.84 + *
1.85 + * @param name the system-dependent file name.
1.86 + */
1.87 + public FileDataSource(String name) {
1.88 + this(new File(name)); // use the file constructor
1.89 + }
1.90 +
1.91 + /**
1.92 + * This method will return an InputStream representing the
1.93 + * the data and will throw an IOException if it can
1.94 + * not do so. This method will return a new
1.95 + * instance of InputStream with each invocation.
1.96 + *
1.97 + * @return an InputStream
1.98 + */
1.99 + public InputStream getInputStream() throws IOException {
1.100 + return new FileInputStream(_file);
1.101 + }
1.102 +
1.103 + /**
1.104 + * This method will return an OutputStream representing the
1.105 + * the data and will throw an IOException if it can
1.106 + * not do so. This method will return a new instance of
1.107 + * OutputStream with each invocation.
1.108 + *
1.109 + * @return an OutputStream
1.110 + */
1.111 + public OutputStream getOutputStream() throws IOException {
1.112 + return new FileOutputStream(_file);
1.113 + }
1.114 +
1.115 + /**
1.116 + * This method returns the MIME type of the data in the form of a
1.117 + * string. This method uses the currently installed FileTypeMap. If
1.118 + * there is no FileTypeMap explictly set, the FileDataSource will
1.119 + * call the <code>getDefaultFileTypeMap</code> method on
1.120 + * FileTypeMap to acquire a default FileTypeMap. <i>Note: By
1.121 + * default, the FileTypeMap used will be a MimetypesFileTypeMap.</i>
1.122 + *
1.123 + * @return the MIME Type
1.124 + * @see javax.activation.FileTypeMap#getDefaultFileTypeMap
1.125 + */
1.126 + public String getContentType() {
1.127 + // check to see if the type map is null?
1.128 + if (typeMap == null)
1.129 + return FileTypeMap.getDefaultFileTypeMap().getContentType(_file);
1.130 + else
1.131 + return typeMap.getContentType(_file);
1.132 + }
1.133 +
1.134 + /**
1.135 + * Return the <i>name</i> of this object. The FileDataSource
1.136 + * will return the file name of the object.
1.137 + *
1.138 + * @return the name of the object.
1.139 + * @see javax.activation.DataSource
1.140 + */
1.141 + public String getName() {
1.142 + return _file.getName();
1.143 + }
1.144 +
1.145 + /**
1.146 + * Return the File object that corresponds to this FileDataSource.
1.147 + * @return the File object for the file represented by this object.
1.148 + */
1.149 + public File getFile() {
1.150 + return _file;
1.151 + }
1.152 +
1.153 + /**
1.154 + * Set the FileTypeMap to use with this FileDataSource
1.155 + *
1.156 + * @param map The FileTypeMap for this object.
1.157 + */
1.158 + public void setFileTypeMap(FileTypeMap map) {
1.159 + typeMap = map;
1.160 + }
1.161 +}
