aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package javax.activation;
aoqi@0: 
aoqi@0: import java.io.InputStream;
aoqi@0: import java.io.OutputStream;
aoqi@0: import java.io.File;
aoqi@0: import java.io.FileDescriptor;
aoqi@0: import java.io.FileNotFoundException;
aoqi@0: import java.io.FileInputStream;
aoqi@0: import java.io.FileOutputStream;
aoqi@0: import java.io.IOException;
aoqi@0: import com.sun.activation.registries.MimeTypeFile;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * The FileDataSource class implements a simple DataSource object
aoqi@0:  * that encapsulates a file. It provides data typing services via
aoqi@0:  * a FileTypeMap object. <p>
aoqi@0:  *
aoqi@0:  * <b>FileDataSource Typing Semantics</b><p>
aoqi@0:  *
aoqi@0:  * The FileDataSource class delegates data typing of files
aoqi@0:  * to an object subclassed from the FileTypeMap class.
aoqi@0:  * The <code>setFileTypeMap</code> method can be used to explicitly
aoqi@0:  * set the FileTypeMap for an instance of FileDataSource. If no
aoqi@0:  * FileTypeMap is set, the FileDataSource will call the FileTypeMap's
aoqi@0:  * getDefaultFileTypeMap method to get the System's default FileTypeMap.
aoqi@0:  *
aoqi@0:  * @see javax.activation.DataSource
aoqi@0:  * @see javax.activation.FileTypeMap
aoqi@0:  * @see javax.activation.MimetypesFileTypeMap
aoqi@0:  *
aoqi@0:  * @since 1.6
aoqi@0:  */
aoqi@0: public class FileDataSource implements DataSource {
aoqi@0: 
aoqi@0:     // keep track of original 'ref' passed in, non-null
aoqi@0:     // one indicated which was passed in:
aoqi@0:     private File _file = null;
aoqi@0:     private FileTypeMap typeMap = null;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Creates a FileDataSource from a File object. <i>Note:
aoqi@0:      * The file will not actually be opened until a method is
aoqi@0:      * called that requires the file to be opened.</i>
aoqi@0:      *
aoqi@0:      * @param file the file
aoqi@0:      */
aoqi@0:     public FileDataSource(File file) {
aoqi@0:         _file = file;   // save the file Object...
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Creates a FileDataSource from
aoqi@0:      * the specified path name. <i>Note:
aoqi@0:      * The file will not actually be opened until a method is
aoqi@0:      * called that requires the file to be opened.</i>
aoqi@0:      *
aoqi@0:      * @param name the system-dependent file name.
aoqi@0:      */
aoqi@0:     public FileDataSource(String name) {
aoqi@0:         this(new File(name));   // use the file constructor
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * This method will return an InputStream representing the
aoqi@0:      * the data and will throw an IOException if it can
aoqi@0:      * not do so. This method will return a new
aoqi@0:      * instance of InputStream with each invocation.
aoqi@0:      *
aoqi@0:      * @return an InputStream
aoqi@0:      */
aoqi@0:     public InputStream getInputStream() throws IOException {
aoqi@0:         return new FileInputStream(_file);
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * This method will return an OutputStream representing the
aoqi@0:      * the data and will throw an IOException if it can
aoqi@0:      * not do so. This method will return a new instance of
aoqi@0:      * OutputStream with each invocation.
aoqi@0:      *
aoqi@0:      * @return an OutputStream
aoqi@0:      */
aoqi@0:     public OutputStream getOutputStream() throws IOException {
aoqi@0:         return new FileOutputStream(_file);
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * This method returns the MIME type of the data in the form of a
aoqi@0:      * string. This method uses the currently installed FileTypeMap. If
aoqi@0:      * there is no FileTypeMap explictly set, the FileDataSource will
aoqi@0:      * call the <code>getDefaultFileTypeMap</code> method on
aoqi@0:      * FileTypeMap to acquire a default FileTypeMap. <i>Note: By
aoqi@0:      * default, the FileTypeMap used will be a MimetypesFileTypeMap.</i>
aoqi@0:      *
aoqi@0:      * @return the MIME Type
aoqi@0:      * @see javax.activation.FileTypeMap#getDefaultFileTypeMap
aoqi@0:      */
aoqi@0:     public String getContentType() {
aoqi@0:         // check to see if the type map is null?
aoqi@0:         if (typeMap == null)
aoqi@0:             return FileTypeMap.getDefaultFileTypeMap().getContentType(_file);
aoqi@0:         else
aoqi@0:             return typeMap.getContentType(_file);
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Return the <i>name</i> of this object. The FileDataSource
aoqi@0:      * will return the file name of the object.
aoqi@0:      *
aoqi@0:      * @return the name of the object.
aoqi@0:      * @see javax.activation.DataSource
aoqi@0:      */
aoqi@0:     public String getName() {
aoqi@0:         return _file.getName();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Return the File object that corresponds to this FileDataSource.
aoqi@0:      * @return the File object for the file represented by this object.
aoqi@0:      */
aoqi@0:     public File getFile() {
aoqi@0:         return _file;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Set the FileTypeMap to use with this FileDataSource
aoqi@0:      *
aoqi@0:      * @param map The FileTypeMap for this object.
aoqi@0:      */
aoqi@0:     public void setFileTypeMap(FileTypeMap map) {
aoqi@0:         typeMap = map;
aoqi@0:     }
aoqi@0: }