Class SolnCache

java.lang.Object
  |
  +--SolnCache

class SolnCache

extends java.lang.Object

implements Solvable

Maintains a backup of the previous solution, and the solve() parameters used to obtain it. Subsequent calls will return a copy of the stored solution data, provided the parameters are the same, and that the cache has not been marked invalid.

Field Summary

protected double[]	cache The cache of solution data
protected double	last_step The value of step for which the cache is valid
protected double	last_x0 The value of x0 for which the cache is valid
protected Solvable	src The Solvable object to obtain new data from

Constructor Summary

SolnCache(Solvable src)

Method Summary

void	invalidate() Requests that the cache be marked invalid.
void	solve(double x0, double step, double[] vals) Requests that the supplied array be filled with solution data.

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait

Field Detail

src

protected Solvable src

The Solvable object to obtain new data from

last_x0

protected double last_x0

The value of x0 for which the cache is valid

last_step

protected double last_step

The value of step for which the cache is valid

cache

protected double[] cache

The cache of solution data

Constructor Detail

SolnCache

public SolnCache(Solvable src)

Parameters:

src - The object to obtain solution data from

Method Detail

solve

public void solve(double x0,
                  double step,
                  double[] vals)

Description copied from interface: Solvable

Requests that the supplied array be filled with solution data. The nth element of the array should be the solution at x = x0 + step*n.

Specified by:

solve in interface Solvable

Tags copied from interface: Solvable

Parameters:

x0 - The initial x-value

step - The increment to be applied to x0

vals - The array which will hold the solution data

invalidate

public void invalidate()

Requests that the cache be marked invalid. This will typically be called after a parameter of the original Solvable has changed.