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## org.jboss.cache.search
Class Transformer

    java.lang.Object
      org.jboss.cache.search.Transformer

    public class Transformer

extends Object

This class is one that does all the 'conversion' work between JBossCache and Hibernate Search. This is where users can switch from Fqn and key to a documentId and vice versa. If the Fqn is in the form /a/b/c and the key - which has to be a String - is keystring; the documentId - which is also a String - will be "Fqn=[/a/b/c]Key=[keystring]"

Author:
  Navin Surtani (nsurtani@redhat.com)

Constructor Summary
`Transformer()`

Method Summary
`static String` | `generateId(org.jboss.cache.Fqn fqn, String key)` Generates the documentId from an Fqn, key combination.
`static org.jboss.cache.Fqn` | `getFqn(String docId)` Takes in the documentId string from the user and will return the Fqn from the Fqn, key combination.
`static String` | `getKey(String docId)` Takes in the documentId string from the user and will return the key from the Fqn, key combination.

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

Constructor Detail

### Transformer

    public Transformer()

Method Detail

### getKey

    public static String getKey(String docId)

  Takes in the documentId string from the user and will return the key from the Fqn, key combination.

  Parameters:
    `docId` - - for the keystring to be obtained
  Returns:
    keystring.

### getFqn

    public static org.jboss.cache.Fqn getFqn(String docId)

  Takes in the documentId string from the user and will return the Fqn from the Fqn, key combination.

  Parameters:
    `docId` - - for the Fqn to be obtained
  Returns:
    Fqn from the documentId.

### generateId

    public static String generateId(org.jboss.cache.Fqn fqn,
                                    String key)
                             throws InvalidFqnException,
                                    InvalidKeyException

  Generates the documentId from an Fqn, key combination.

  Parameters:
    `fqn` - - standard call Fqn.fromString()
    `key` - - cannot be an object.
  Returns:
    documentId String to be given to Lucene.
  Throws:
    `InvalidFqnException`
    `InvalidKeyException`

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