SignSemantic.java

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 *
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package org.orekit.estimation.measurements.generation;

/** Enumerate for the semantic of the {@code g} function sign during measurements generation.
 * @see EventBasedScheduler
 * @author Luc Maisonobe
 * @since 9.3
 */
public enum SignSemantic {

    /** Semantic for detectors that have positive g function when measurements are feasible. */
    FEASIBLE_MEASUREMENT_WHEN_POSITIVE(+1.0),

    /** Semantic for detectors that have negative g function when measurements are feasible. */
    FEASIBLE_MEASUREMENT_WHEN_NEGATIVE(-1.0);

    /** Reference sign. */
    private final double sign;

    /** Simple constructor.
     * @param sign reference sign
     */
    SignSemantic(final double sign) {
        this.sign = sign;
    }

    /** Check if measurement is feasible.
     * @param g value of the detector g function
     * @return true if measurement is feasible
     */
    public boolean measurementIsFeasible(final double g) {
        return sign * g >= 0;
    }

}