| /* |
| * Copyright (c) 1997, 2012, 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 javax.activation; |
| |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.io.File; |
| import java.io.FileDescriptor; |
| import java.io.FileNotFoundException; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import com.sun.activation.registries.MimeTypeFile; |
| |
| /** |
| * The FileDataSource class implements a simple DataSource object |
| * that encapsulates a file. It provides data typing services via |
| * a FileTypeMap object. <p> |
| * |
| * <b>FileDataSource Typing Semantics</b><p> |
| * |
| * The FileDataSource class delegates data typing of files |
| * to an object subclassed from the FileTypeMap class. |
| * The <code>setFileTypeMap</code> method can be used to explicitly |
| * set the FileTypeMap for an instance of FileDataSource. If no |
| * FileTypeMap is set, the FileDataSource will call the FileTypeMap's |
| * getDefaultFileTypeMap method to get the System's default FileTypeMap. |
| * |
| * @see javax.activation.DataSource |
| * @see javax.activation.FileTypeMap |
| * @see javax.activation.MimetypesFileTypeMap |
| * |
| * @since 1.6 |
| */ |
| public class FileDataSource implements DataSource { |
| |
| // keep track of original 'ref' passed in, non-null |
| // one indicated which was passed in: |
| private File _file = null; |
| private FileTypeMap typeMap = null; |
| |
| /** |
| * Creates a FileDataSource from a File object. <i>Note: |
| * The file will not actually be opened until a method is |
| * called that requires the file to be opened.</i> |
| * |
| * @param file the file |
| */ |
| public FileDataSource(File file) { |
| _file = file; // save the file Object... |
| } |
| |
| /** |
| * Creates a FileDataSource from |
| * the specified path name. <i>Note: |
| * The file will not actually be opened until a method is |
| * called that requires the file to be opened.</i> |
| * |
| * @param name the system-dependent file name. |
| */ |
| public FileDataSource(String name) { |
| this(new File(name)); // use the file constructor |
| } |
| |
| /** |
| * This method will return an InputStream representing the |
| * the data and will throw an IOException if it can |
| * not do so. This method will return a new |
| * instance of InputStream with each invocation. |
| * |
| * @return an InputStream |
| */ |
| public InputStream getInputStream() throws IOException { |
| return new FileInputStream(_file); |
| } |
| |
| /** |
| * This method will return an OutputStream representing the |
| * the data and will throw an IOException if it can |
| * not do so. This method will return a new instance of |
| * OutputStream with each invocation. |
| * |
| * @return an OutputStream |
| */ |
| public OutputStream getOutputStream() throws IOException { |
| return new FileOutputStream(_file); |
| } |
| |
| /** |
| * This method returns the MIME type of the data in the form of a |
| * string. This method uses the currently installed FileTypeMap. If |
| * there is no FileTypeMap explictly set, the FileDataSource will |
| * call the <code>getDefaultFileTypeMap</code> method on |
| * FileTypeMap to acquire a default FileTypeMap. <i>Note: By |
| * default, the FileTypeMap used will be a MimetypesFileTypeMap.</i> |
| * |
| * @return the MIME Type |
| * @see javax.activation.FileTypeMap#getDefaultFileTypeMap |
| */ |
| public String getContentType() { |
| // check to see if the type map is null? |
| if (typeMap == null) |
| return FileTypeMap.getDefaultFileTypeMap().getContentType(_file); |
| else |
| return typeMap.getContentType(_file); |
| } |
| |
| /** |
| * Return the <i>name</i> of this object. The FileDataSource |
| * will return the file name of the object. |
| * |
| * @return the name of the object. |
| * @see javax.activation.DataSource |
| */ |
| public String getName() { |
| return _file.getName(); |
| } |
| |
| /** |
| * Return the File object that corresponds to this FileDataSource. |
| * @return the File object for the file represented by this object. |
| */ |
| public File getFile() { |
| return _file; |
| } |
| |
| /** |
| * Set the FileTypeMap to use with this FileDataSource |
| * |
| * @param map The FileTypeMap for this object. |
| */ |
| public void setFileTypeMap(FileTypeMap map) { |
| typeMap = map; |
| } |
| } |