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/*
 * -----------------------------------------------------------------------
 * Copyright © 2013-2014 Meno Hochschild, 
 * -----------------------------------------------------------------------
 * This file (RuleNotFoundException.java) is part of project Time4J.
 *
 * Time4J is free software: You can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * Time4J is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Time4J. If not, see .
 * -----------------------------------------------------------------------
 */

package net.time4j.engine;


/**
 * Indicates that a chronological rule for an element or
 * a time unit is missing. 
 *
 * @author  Meno Hochschild
 */
/*[deutsch]
 * Signalisiert das Fehlen einer chronologischen Regel für ein
 * chronologisches Element oder eine Zeiteinheit. 
 *
 * @author  Meno Hochschild
 */
public class RuleNotFoundException
    extends ChronoException {

    //~ Statische Felder/Initialisierungen --------------------------------

    private static final long serialVersionUID = -5638437652574160520L;

    //~ Konstruktoren -----------------------------------------------------

    /**
     * Erzeugt eine neue Instanz von RuleNotFoundException.
     *
     * @param   chronology  chronology a rule was searched for in vain
     * @param   element     element as reference for searched rule
     */
    RuleNotFoundException(
        Chronology chronology,
        ChronoElement element
    ) {
        super(createMessage(chronology, element));

    }

    /**
     * Erzeugt eine neue Instanz von RuleNotFoundException.
     *
     * @param   veto        detailed error message
     */
    RuleNotFoundException(String veto) {
        super(veto);

    }

    /**
     * Erzeugt eine neue Instanz von RuleNotFoundException.
     *
     * @param   chronology  chronology a rule was searched for in vain
     * @param   unit        unit as reference for searched rule
     */
    RuleNotFoundException(
        Chronology chronology,
        Object unit
    ) {
        super(createMessage(chronology, unit));

    }

    //~ Methoden ----------------------------------------------------------

    private static String createMessage(
        Chronology chronology,
        ChronoElement element
    ) {

        return (
            "Cannot find any rule for chronological element \""
            + element.name()
            + "\" in: "
            + chronology.getChronoType().getName());

    }

    private static String createMessage(
        Chronology chronology,
        Object unit
    ) {

        return (
            "Cannot find any rule for chronological unit \""
            + getName(unit)
            + "\" in: "
            + chronology.getChronoType().getName());

    }

    private static String getName(Object unit) {

        if (unit instanceof Enum) {
            return Enum.class.cast(unit).name();
        } else {
            return unit.toString();
        }

    }

}