package javax.activation; import java.io.File; import java.io.InputStream; import java.io.OutputStream; public class FileDataSource implements DataSource { public FileDataSource(String p0) {} public FileDataSource(File p0) {} public String getContentType() { return null; } public InputStream getInputStream() { return null; } public String getName() { return null; } public OutputStream getOutputStream() { return null; } }