Page SoftwareFrameworkDesign

Software Frame Design

General

Core Packages

ToDo (Martin)

• (Done) Discard current interface IVector and use standard Java collection interfaces ( List ) instead
• (Done) Implement prototypic version of Multiplication.java and Addition.java for combinations of vector/vector, vector/matrix, matrix/matrix
• (Done) Introduce GlobalDispatcher / Multimethods

Algebra

Part of Milestone 1:

• Interface IDoubleMatrix, IDoubleVector (Done)
• Interfaces for complex numbers, vectors and matrices?
• Data-specific classes (e.g. SparseDoubleMatrix, DoubleMatrix, …)
• Object creation: Use type-specific factory classes which implement IMatrix(Double)Factory (Done)
• Algorithms: Individual operations in Algorithm classes, such as Addition.java and Multiplication.java. Executed by standard method name, e.g. Multiplication.exec( IDoubleMatrix A, IDoubleMatrix B ) (Done)
• Each algorithm has a default implementation (for dense matrices/vectors) (Done)
• Algorithms can have additional more efficient implementations for arbitrary combinations of specific types (e.g. Multiplication.exec( SparseDoubleMatrix A, SparseDoubleVector x )). This requires multi-dispatching or multi-methods, which means, that overloaded methods are called by the dynamical type of arguments instead of static type. Solution possibilities:
  1. Several if-statements and instanceof operator.
  2. Use of double inheritance to "simulate" multi dispatching.
  3. Java reflection API.
  4. Dynamic dispatcher via interfaces ( ← chosen )
• (Open) General dispatching mechanism (not only based on dynamic type, but instead uses interface IDispatchable with boolean checkArguments() to select appropiate method)
• (Open) Incorporate working EVD to framework

Collection and Primitive Collections

Part of Milestone 1:

Clustering / Discretization

• (Done) Additional implementation of k-means

Part of Milestone 2:

Time Series Package

MSM

HMM

MD Package

IO

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