Interface Summary
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
DigestAlgorithm Computes a 'hashvalue' for the content of file using
EqualComparator Simple implementation of Comparator for use in CacheSelector.
HashvalueAlgorithm Computes a 'hashvalue' for the content of file using String.hashValue().
ModifiedSelector Selector class that uses Algorithm, Cache and Comparator for its work.
PropertiesfileCache Use java.util.Properties for storing the values.

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