Javadoc: InputStreamSource (spring-core 3.2.10.RELEASE API)

All Known Subinterfaces:

ContextResource, Resource, WritableResource

All Known Implementing Classes:

AbstractFileResolvingResource, AbstractResource, ByteArrayResource, ClassPathResource, DescriptiveResource, FileSystemResource, InputStreamResource, UrlResource, VfsResource
```
public interface InputStreamSource
```
Simple interface for objects that are sources for an InputStream.
This is the base interface for Spring's more extensive Resource interface.

For single-use streams, InputStreamResource can be used for any given InputStream. Spring's ByteArrayResource or any file-based Resource implementation can be used as a concrete instance, allowing one to read the underlying content stream multiple times. This makes this interface useful as an abstract content source for mail attachments, for example.

Since:

20.01.2004

Author:

Juergen Hoeller

See Also:

InputStream, Resource, InputStreamResource, ByteArrayResource

- Method Summary
  
  Methods
  
  Modifier and Type Method and Description
  
  InputStream getInputStream()
  Return an InputStream.

- Method Detail
  - getInputStream
```
InputStream getInputStream()
                           throws IOException
```
    Return an InputStream.
    It is expected that each call creates a fresh stream.
    
    This requirement is particularly important when you consider an API such as JavaMail, which needs to be able to read the stream multiple times when creating mail attachments. For such a use case, it is required that each getInputStream() call returns a fresh stream.
    
    Returns:
    
    the input stream for the underlying resource (must not be null)
    
    Throws:
    
    IOException - if the stream could not be opened
    
    See Also:
    
    org.springframework.mail.javamail.MimeMessageHelper#addAttachment(String, InputStreamSource)