# Hasher (Oracle - Berkeley DB Java API)
Date: 2010-04-12

Berkeley DB version 4.8.30

## com.sleepycat.db
Interface Hasher

    public interface Hasher

An application-specified, database hash function.

Method Summary
`int` `hash(Database db, byte[] data, int len)` An application-specified, database-specific hash function.

Method Detail

### hash

    int hash(Database db,
             byte[] data,
             int len)

  An application-specified, database-specific hash function.

  The hash function must handle any key values used by the application (possibly including zero-length keys).

  Parameters:
    `db` - The enclosing database handle.
    `data` - The byte string to be hashed.
    `len` - The length of the byte string in bytes.

    @return The hash value of the byte string.

Berkeley DB version 4.8.30

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