org.springframework.core.io

Class InputStreamResource

java.lang.Object

org.springframework.core.io.AbstractResource

org.springframework.core.io.InputStreamResource

All Implemented Interfaces:

InputStreamSource, Resource

public class InputStreamResource
extends AbstractResource

Resource implementation for a given InputStream.

Should only be used if no other specific Resource implementation is applicable. In particular, prefer ByteArrayResource or any of the file-based Resource implementations where possible.

In contrast to other Resource implementations, this is a descriptor for an already opened resource - therefore returning true from isOpen(). Do not use an InputStreamResource if you need to keep the resource descriptor somewhere, or if you need to read from a stream multiple times.

Since:

28.12.2003

Author:

Juergen Hoeller, Sam Brannen

See Also:

ByteArrayResource, ClassPathResource, FileSystemResource, UrlResource

Constructor Summary

Constructors

Constructor and Description
InputStreamResource(InputStream inputStream) Create a new InputStreamResource.
InputStreamResource(InputStream inputStream, String description) Create a new InputStreamResource.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other) This implementation compares the underlying InputStream.
boolean	exists() This implementation always returns true.
String	getDescription() This implementation returns a description that includes the passed-in description, if any.
InputStream	getInputStream() This implementation throws IllegalStateException if attempting to read the underlying stream multiple times.
int	hashCode() This implementation returns the hash code of the underlying InputStream.
boolean	isOpen() This implementation always returns true.

Methods inherited from class org.springframework.core.io.AbstractResource

contentLength, createRelative, getFile, getFileForLastModifiedCheck, getFilename, getURI, getURL, isFile, isReadable, lastModified, readableChannel, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

InputStreamResource

public InputStreamResource(InputStream inputStream)

Create a new InputStreamResource.

Parameters:

inputStream - the InputStream to use

InputStreamResource

public InputStreamResource(InputStream inputStream,
                           @Nullable
                           String description)

Create a new InputStreamResource.

Parameters:

inputStream - the InputStream to use

description - where the InputStream comes from

Method Detail

exists

public boolean exists()

This implementation always returns true.

Specified by:

exists in interface Resource

Overrides:

exists in class AbstractResource

isOpen

public boolean isOpen()

This implementation always returns true.

Specified by:

isOpen in interface Resource

Overrides:

isOpen in class AbstractResource

getInputStream

public InputStream getInputStream()
                           throws IOException,
                                  IllegalStateException

This implementation throws IllegalStateException if attempting to read the underlying stream multiple times.

Returns:

the input stream for the underlying resource (must not be null)

Throws:

FileNotFoundException - if the underlying resource doesn't exist

IOException - if the content stream could not be opened

IllegalStateException

getDescription

public String getDescription()

This implementation returns a description that includes the passed-in description, if any.

See Also:

Object.toString()

equals

public boolean equals(Object other)

This implementation compares the underlying InputStream.

Overrides:

equals in class AbstractResource

See Also:

Resource.getDescription()

hashCode

public int hashCode()

This implementation returns the hash code of the underlying InputStream.

Overrides:

hashCode in class AbstractResource

See Also:

Resource.getDescription()