com.opengamma.analytics.math.integration.GaussianQuadratureData.java Source code

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Here is the source code for com.opengamma.analytics.math.integration.GaussianQuadratureData.java

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/**
 * Copyright (C) 2009 - present by OpenGamma Inc. and the OpenGamma group of companies
 *
 * Please see distribution for license.
 */
package com.opengamma.analytics.math.integration;

import java.util.Arrays;

import org.apache.commons.lang.Validate;

/**
 * Class holding the results of calculations of weights and abscissas by {@link QuadratureWeightAndAbscissaFunction}. 
 */
public class GaussianQuadratureData {
    private final double[] _weights;
    private final double[] _abscissas;

    /**
     * @param abscissas An array containing the abscissas, not null
     * @param weights An array containing the weights, not null, must be the same length as the abscissa array
     */
    public GaussianQuadratureData(final double[] abscissas, final double[] weights) {
        Validate.notNull(abscissas, "abscissas");
        Validate.notNull(weights, "weights");
        Validate.isTrue(abscissas.length == weights.length, "Abscissa and weight arrays must be the same length");
        _weights = weights;
        _abscissas = abscissas;
    }

    /**
     * @return The weights
     */
    public double[] getWeights() {
        return _weights;
    }

    /**
     * @return The abscissas
     */
    public double[] getAbscissas() {
        return _abscissas;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + Arrays.hashCode(_abscissas);
        result = prime * result + Arrays.hashCode(_weights);
        return result;
    }

    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final GaussianQuadratureData other = (GaussianQuadratureData) obj;
        if (!Arrays.equals(_abscissas, other._abscissas)) {
            return false;
        }
        return Arrays.equals(_weights, other._weights);
    }

}