/**
* Copyright (C) 2011 - present by OpenGamma Inc. and the OpenGamma group of companies
*
* Please see distribution for license.
*/
package com.opengamma.analytics.math.interpolation.data;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.Map;
import com.opengamma.analytics.math.function.Function1D;
import com.opengamma.analytics.math.interpolation.Interpolator1D;
import com.opengamma.analytics.math.matrix.DoubleMatrix1D;
import com.opengamma.util.ArgumentChecker;
/**
*
*/
public class Interpolator1DDataBundleBuilderFunction extends Function1D<DoubleMatrix1D, LinkedHashMap<String, Interpolator1DDataBundle>> {
private final LinkedHashMap<String, double[]> _knotPoints;
private final LinkedHashMap<String, Interpolator1D> _interpolators;
private final int _nNodes;
public Interpolator1DDataBundleBuilderFunction(final LinkedHashMap<String, double[]> knotPoints, final LinkedHashMap<String, Interpolator1D> interpolators) {
ArgumentChecker.notNull(knotPoints, "null knot points");
ArgumentChecker.notNull(interpolators, "null interpolators");
int count = 0;
for (final Map.Entry<String, double[]> entry : knotPoints.entrySet()) {
final int size = entry.getValue().length;
ArgumentChecker.isTrue(size > 0, "no knot points for " + entry.getKey());
count += size;
}
_knotPoints = knotPoints;
_interpolators = interpolators;
_nNodes = count;
}
@Override
public LinkedHashMap<String, Interpolator1DDataBundle> evaluate(final DoubleMatrix1D x) {
ArgumentChecker.notNull(x, "null data x");
ArgumentChecker.isTrue(_nNodes == x.getNumberOfElements(), "x wrong length");
final LinkedHashMap<String, Interpolator1DDataBundle> res = new LinkedHashMap<>();
int index = 0;
for (final String name : _interpolators.keySet()) {
final Interpolator1D interpolator = _interpolators.get(name);
final double[] nodes = _knotPoints.get(name);
final double[] values = Arrays.copyOfRange(x.getData(), index, index + nodes.length);
index += nodes.length;
final Interpolator1DDataBundle db = interpolator.getDataBundleFromSortedArrays(nodes, values);
res.put(name, db);
}
return res;
}
}