public interface StringMap<S extends CharSequence> extends Object2LongFunction<CharSequence>, Size64, Serializable
String maps represent mappings from strings (actually, any subclass of
to numbers; they can support reverse
mapping, too. The latter has usually sense only if the map is minimal and perfect (e.g., a bijection of a set
of string with an initial segment of the natural numbers of the same size). String maps are useful for
terms of an MG4J
inverted index, URLs of a WebGraph-compressed
web snapshot, and so on.
|Modifier and Type||Field and Description|
|Modifier and Type||Method and Description|
Returns a list view of the domain of this string map (optional operation).
Returns the intended number of keys in this function, or -1 if no such number exists.
applyAsLong, defaultReturnValue, defaultReturnValue, get, getLong, put, put, remove, removeLong
static final long serialVersionUID
ObjectBigList<? extends S> list()
Note that the list view acts as an inverse of the mapping implemented by this map.
nullif this map does not support this operation.
default long size64()
Most function implementations will have some knowledge of the intended number of keys in their domain. In some cases, however, this might not be possible. This default implementation, in particular, returns -1.