org.icij.extract.extractor

Class UpdatableInputStreamDigester

java.lang.Object

org.icij.extract.extractor.UpdatableInputStreamDigester

All Implemented Interfaces:

org.apache.tika.parser.DigestingParser.Digester

public abstract class UpdatableInputStreamDigester
extends Object
implements org.apache.tika.parser.DigestingParser.Digester

copied from tika to customize digestStream that is used for id generation

See Also:

InputStreamDigester

Method Summary

Modifier and Type	Method and Description
void	digest(InputStream is, org.apache.tika.metadata.Metadata metadata, org.apache.tika.parser.ParseContext parseContext)
protected abstract String	getDigestUpdateModifier()
protected Provider	getProvider() When subclassing this, becare to ensure that your provider is thread-safe (not likely) or return a new provider with each call.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getDigestUpdateModifier

protected abstract String getDigestUpdateModifier()

getProvider

protected Provider getProvider()

When subclassing this, becare to ensure that your provider is thread-safe (not likely) or return a new provider with each call.

Returns:

provider to use to get the MessageDigest from the algorithm name. Default is to return null.

digest

public void digest(InputStream is,
                   org.apache.tika.metadata.Metadata metadata,
                   org.apache.tika.parser.ParseContext parseContext)
            throws IOException

Specified by:

digest in interface org.apache.tika.parser.DigestingParser.Digester

Parameters:

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

Throws:

IOException - on IO problem or IllegalArgumentException if algorithm couldn't be found