# Package org.apache.tools.ant.types.selectors.modifiedselector

- Interface Summary
  Interface | Description
  --- | ---
  Algorithm | The Algorithm defines how a value for a file is computed.
  Cache | A Cache let the user store key-value-pairs in a permanent manner and access them.

- Class Summary
  Class | Description
  --- | ---
  ChecksumAlgorithm | Computes a 'checksum' for the content of file using java.util.zip.CRC32 and java.util.zip.Adler32.
  DigestAlgorithm | Computes a 'hashvalue' for the content of file using java.security.MessageDigest.
  EqualComparator | Simple implementation of Comparator for use in CacheSelector.
  HashvalueAlgorithm | Computes a 'hashvalue' for the content of file using String.hashValue().
  LastModifiedAlgorithm | Computes a 'timestamp' of file based on the lastModified time of that file.
  ModifiedSelector | Selector class that uses Algorithm, Cache and Comparator for its work.
  ModifiedSelector.AlgorithmName | The enumerated type for algorithm.
  ModifiedSelector.CacheName | The enumerated type for cache.
  ModifiedSelector.ComparatorName | The enumerated type for algorithm.
  PropertiesfileCache | Use java.util.Properties for storing the values.