Mapping

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ptolemy.graph.mapping
Interface Mapping

All Known Subinterfaces:: ToDoubleMapping, ToIntMapping

All Known Implementing Classes:: MapMapping, ToDoubleMapMapping, ToIntMapMapping

public interface Mapping

A mapping from some domain of values into some range. Mappings are different from Maps (see List) in that the set of keys (domain values) is not necessarily stored with or even known to a Mapping. Enumeration of or iteration through the domain values is thus not in general possible.

This is a base interface for specific mappings. For efficiency, the derived mappings should define their own methods to actually perform the associated mapping function. These methods can thus be specialized, for example, to return the desired return type (rather than an Object). Also, derived Mappings may choose, again for efficiency reasons, to forego any error-checking in the methods that implement their mapping functions (i.e, they may assume that the arguments are in the corresponding domains). In such cases, the inDomain(Object) method can be used when it is desired to make sure that that a candidate argument is in the domain.

Since:

Ptolemy II 4.0

Version:

$Id: Mapping.java 57040 2010-01-27 20:52:32Z cxh $

Author:

Shuvra S. Bhattacharyya, Shahrooz Shahparnia

Accepted Rating:

Red (ssb)

Proposed Rating: