Class AbbreviationMap<V>

  • Type Parameters:
    V - a constraint on the types of the values in the map
    All Implemented Interfaces:
    OptionNameMap<V>

    public class AbbreviationMap<V>
    extends Object
    implements OptionNameMap<V>

    A map whose keys are strings; when a key/value pair is added to the map, the longest unique abbreviations of that key are added as well, and associated with the value. Thus:

       
       abbreviations.put( "good", "bye" );
       
     

    would make it such that you could retrieve the value "bye" from the map using the keys "good", "goo", "go", and "g". A subsequent invocation of:

       
       abbreviations.put( "go", "fish" );
       
     

    would make it such that you could retrieve the value "bye" using the keys "good" and "goo", and the value "fish" using the key "go". The key "g" would yield null, since it would no longer be a unique abbreviation.

    The data structure is much like a "trie".

    Author:
    Paul Holser
    See Also:
    Perl's Text::Abbrev module, Radix tree
    • Constructor Detail

      • AbbreviationMap

        public AbbreviationMap()
    • Method Detail

      • contains

        public boolean contains​(String key)

        Tells whether the given key is in the map, or whether the given key is a unique abbreviation of a key that is in the map.

        Specified by:
        contains in interface OptionNameMap<V>
        Parameters:
        key - key to look up
        Returns:
        true if key is present in the map
        Throws:
        NullPointerException - if key is null
      • get

        public V get​(String key)

        Answers the value associated with the given key. The key can be a unique abbreviation of a key that is in the map.

        Specified by:
        get in interface OptionNameMap<V>
        Parameters:
        key - key to look up
        Returns:
        the value associated with aKey; or null if there is no such value or aKey is not a unique abbreviation of a key in the map
        Throws:
        NullPointerException - if aKey is null
      • put

        public void put​(String key,
                        V newValue)

        Associates a given value with a given key. If there was a previous association, the old value is replaced with the new one.

        Specified by:
        put in interface OptionNameMap<V>
        Parameters:
        key - key to create in the map
        newValue - value to associate with the key
        Throws:
        NullPointerException - if aKey or newValue is null
        IllegalArgumentException - if aKey is a zero-length string
      • putAll

        public void putAll​(Iterable<String> keys,
                           V newValue)

        Associates a given value with a given set of keys. If there was a previous association, the old value is replaced with the new one.

        Specified by:
        putAll in interface OptionNameMap<V>
        Parameters:
        keys - keys to create in the map
        newValue - value to associate with the key
        Throws:
        NullPointerException - if keys or newValue is null
        IllegalArgumentException - if any of keys is a zero-length string
      • toJavaUtilMap

        public Map<String,​V> toJavaUtilMap()
        Gives a Java map representation of this abbreviation map.
        Specified by:
        toJavaUtilMap in interface OptionNameMap<V>
        Returns:
        a Java map corresponding to this abbreviation map