Class FileDataSource

app/src/main/java/javax/activation/FileDataSource.java:41–141

The FileDataSource class implements a simple DataSource object that encapsulates a file. It provides data typing services via a FileTypeMap object. FileDataSource Typing Semantics The FileDataSource class delegates data typing of files to an object subclassed from the FileTypeMap cla

 * @see javax.activation.MimetypesFileTypeMap
 */
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