Sha256InputStreamDecorator (IBM FHIR Server)

java.lang.Object
- java.io.InputStream
- - com.ibm.fhir.bucket.scanner.Sha256InputStreamDecorator

All Implemented Interfaces:

Closeable, AutoCloseable
```
public class Sha256InputStreamDecorator
extends InputStream
```
Decorates an InputStream with the ability to compute a SHA-256 hash of the bytes read from the stream. Assumes that the entire stream is read. If buffering is done further up-stream, then obviously the digest may not represent what was actually read by the consumer, because the buffer may read bytes from this stream than were actually consumed. Caveat emptor.

Constructor Summary

Constructors
Constructor Description

Sha256InputStreamDecorator(InputStream delegate)
Public Constructor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`close()`
`String`	`getBase64Hash()`	Compute the digest.
`int`	`read()`
`int`	`read(byte[] b, int off, int len)`

Methods inherited from class java.io.InputStream
available, mark, markSupported, nullInputStream, read, readAllBytes, readNBytes, readNBytes, reset, skip, transferTo

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

- Constructor Detail
  - Sha256InputStreamDecorator
```
public Sha256InputStreamDecorator(InputStream delegate)
```
    Public Constructor
    
    Parameters:
    
    delegate - the delegate stream we are decorating
- Method Detail
  - getBase64Hash
```
public String getBase64Hash()
```
    Compute the digest. Resets the state
    
    Returns:
  - read
```
public int read()
         throws IOException
```
    Specified by:
    
    read in class InputStream
    
    Throws:
    
    IOException
  - read
```
public int read(byte[] b,
                int off,
                int len)
         throws IOException
```
    Overrides:
    
    read in class InputStream
    
    Throws:
    
    IOException
  - close
```
public void close()
           throws IOException
```
    Specified by:
    
    close in interface AutoCloseable
    
    Specified by:
    
    close in interface Closeable
    
    Overrides:
    
    close in class InputStream
    
    Throws:
    
    IOException