|Constructor and Description|
|Modifier and Type||Method and Description|
Digests an InputStream and sets the appropriate value(s) in the metadata.
When subclassing this, becare to ensure that your provider is thread-safe (not likely) or return a new provider with each call.
public InputStreamDigester(int markLimit, String algorithm, DigestingParser.Encoder encoder)
public InputStreamDigester(int markLimit, String algorithm, String algorithmKeyName, DigestingParser.Encoder encoder)
markLimit- limit in bytes to allow for mark/reset. If the inputstream is longer than this limit, the stream will be reset and then spooled to a temporary file. Throws IllegalArgumentException if < 0.
algorithm- name of the digest algorithm to retrieve from the Provider
algorithmKeyName- name of the algorithm to store as part of the key in the metadata when
digest(InputStream, Metadata, ParseContext)is called
encoder- encoder to convert the byte array returned from the digester to a string
protected Provider getProvider()
public void digest(InputStream is, Metadata metadata, ParseContext parseContext) throws IOException
The given stream is guaranteed to support the
mark feature and the detector
is expected to
mark the stream before
reading any bytes from it, and to
the stream before returning. The stream must not be closed by the
is- InputStream to digest. Best to use a TikaInputStream because of potential need to spool to disk. InputStream must support mark/reset.
metadata- metadata in which to store the digest information
parseContext- ParseContext -- not actually used yet, but there for future expansion
IOException- on IO problem or IllegalArgumentException if algorithm couldn't be found
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