/*
* Copyright Myrrix Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.myrrix.common.math;
import org.apache.commons.math3.linear.ArrayRealVector;
import org.apache.commons.math3.linear.DecompositionSolver;
import org.apache.commons.math3.linear.RealVector;
/**
* Encapsulates a {@link DecompositionSolver} from Commons Math.
*
* @author Sean Owen
*/
final class CommonsMathSolver implements Solver {
private final DecompositionSolver solver;
CommonsMathSolver(DecompositionSolver solver) {
this.solver = solver;
}
@Override
public float[] solveDToF(double[] b) {
RealVector vec = solver.solve(new ArrayRealVector(b, false));
float[] result = new float[b.length];
for (int i = 0; i < result.length; i++) {
result[i] = (float) vec.getEntry(i);
}
return result;
}
@Override
public double[] solveFToD(float[] b) {
ArrayRealVector bVec = new ArrayRealVector(b.length);
for (int i = 0; i < b.length; i++) {
bVec.setEntry(i, b[i]);
}
RealVector vec = solver.solve(bVec);
double[] result = new double[b.length];
for (int i = 0; i < result.length; i++) {
result[i] = vec.getEntry(i);
}
return result;
}
}