FileDataSource

java.lang.Object
- jakarta.activation.FileDataSource

All Implemented Interfaces:

DataSource
```
public class FileDataSource
extends java.lang.Object
implements DataSource
```
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 class. The setFileTypeMap 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 Also:

DataSource, FileTypeMap, MimetypesFileTypeMap

Constructor Summary

Constructors
Constructor and Description
`FileDataSource(java.io.File file)` Creates a FileDataSource from a File object.
`FileDataSource(java.lang.String name)` Creates a FileDataSource from the specified path name.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`java.lang.String`	`getContentType()` This method returns the MIME type of the data in the form of a string.
`java.io.File`	`getFile()` Return the File object that corresponds to this FileDataSource.
`java.io.InputStream`	`getInputStream()` This method will return an InputStream representing the the data and will throw an IOException if it can not do so.
`java.lang.String`	`getName()` Return the name of this object.
`java.io.OutputStream`	`getOutputStream()` This method will return an OutputStream representing the the data and will throw an IOException if it can not do so.
`void`	`setFileTypeMap(FileTypeMap map)` Set the FileTypeMap to use with this FileDataSource

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FileDataSource
```
public FileDataSource(java.io.File file)
```
    Creates a FileDataSource from a File object. Note: The file will not actually be opened until a method is called that requires the file to be opened.
    
    Parameters:
    
    file - the file
  - FileDataSource
```
public FileDataSource(java.lang.String name)
```
    Creates a FileDataSource from the specified path name. Note: The file will not actually be opened until a method is called that requires the file to be opened.
    
    Parameters:
    
    name - the system-dependent file name.
- Method Detail
  - getInputStream
```
public java.io.InputStream getInputStream()
                                   throws java.io.IOException
```
    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.
    
    Specified by:
    
    getInputStream in interface DataSource
    
    Returns:
    
    an InputStream
    
    Throws:
    
    java.io.IOException - for failures creating the InputStream
  - getOutputStream
```
public java.io.OutputStream getOutputStream()
                                     throws java.io.IOException
```
    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.
    
    Specified by:
    
    getOutputStream in interface DataSource
    
    Returns:
    
    an OutputStream
    
    Throws:
    
    java.io.IOException - for failures creating the OutputStream
  - getContentType
```
public java.lang.String getContentType()
```
    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 getDefaultFileTypeMap method on FileTypeMap to acquire a default FileTypeMap. Note: By default, the FileTypeMap used will be a MimetypesFileTypeMap.
    
    Specified by:
    
    getContentType in interface DataSource
    
    Returns:
    
    the MIME Type
    
    See Also:
    
    FileTypeMap.getDefaultFileTypeMap()
  - getName
```
public java.lang.String getName()
```
    Return the name of this object. The FileDataSource will return the file name of the object.
    
    Specified by:
    
    getName in interface DataSource
    
    Returns:
    
    the name of the object.
    
    See Also:
    
    DataSource
  - getFile
```
public java.io.File getFile()
```
    Return the File object that corresponds to this FileDataSource.
    
    Returns:
    
    the File object for the file represented by this object.
  - setFileTypeMap
```
public void setFileTypeMap(FileTypeMap map)
```
    Set the FileTypeMap to use with this FileDataSource
    
    Parameters:
    
    map - The FileTypeMap for this object.

Class FileDataSource

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

FileDataSource

FileDataSource

Method Detail

getInputStream

getOutputStream

getContentType

getName

getFile

setFileTypeMap