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Standard interfaces implemented throughout the library.
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/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2011, Open Source Geospatial Foundation (OSGeo)
 *    (C) 2004-2005, Open Geospatial Consortium Inc.
 *
 *    All Rights Reserved. http://www.opengis.org/legal/
 */
package org.opengis.metadata.maintenance;

import static org.opengis.annotation.Obligation.*;
import static org.opengis.annotation.Specification.*;

import java.util.ArrayList;
import java.util.List;
import org.opengis.annotation.UML;
import org.opengis.util.CodeList;

/**
 * Frequency with which modifications and deletions are made to the data after it is first produced.
 *
 * @version ISO 19115
 * @author Martin Desruisseaux (IRD)
 * @since GeoAPI 2.0
 */
@UML(identifier = "MD_MaintenanceFrequencyCode", specification = ISO_19115)
public final class MaintenanceFrequency extends CodeList {
    /** Serial number for compatibility with different versions. */
    private static final long serialVersionUID = -6034786030982260550L;

    /** List of all enumerations of this type. Must be declared before any enum declaration. */
    private static final List VALUES =
            new ArrayList(12);

    /** Data is repeatedly and frequently updated. */
    @UML(identifier = "continual", obligation = CONDITIONAL, specification = ISO_19115)
    public static final MaintenanceFrequency CONTINUAL = new MaintenanceFrequency("CONTINUAL");

    /** Data is updated each day. */
    @UML(identifier = "daily", obligation = CONDITIONAL, specification = ISO_19115)
    public static final MaintenanceFrequency DAILY = new MaintenanceFrequency("DAILY");

    /** Data is updated on a weekly basis. */
    @UML(identifier = "weekly", obligation = CONDITIONAL, specification = ISO_19115)
    public static final MaintenanceFrequency WEEKLY = new MaintenanceFrequency("WEEKLY");

    /** Data is updated every two weeks. */
    @UML(identifier = "fortnightly", obligation = CONDITIONAL, specification = ISO_19115)
    public static final MaintenanceFrequency FORTNIGHTLY = new MaintenanceFrequency("FORTNIGHTLY");

    /** Data is updated each month. */
    @UML(identifier = "monthly", obligation = CONDITIONAL, specification = ISO_19115)
    public static final MaintenanceFrequency MONTHLY = new MaintenanceFrequency("MONTHLY");

    /** Data is updated every three months. */
    @UML(identifier = "quarterly", obligation = CONDITIONAL, specification = ISO_19115)
    public static final MaintenanceFrequency QUARTERLY = new MaintenanceFrequency("QUARTERLY");

    /** Data is updated twice each year. */
    @UML(identifier = "biannually", obligation = CONDITIONAL, specification = ISO_19115)
    public static final MaintenanceFrequency BIANNUALLY = new MaintenanceFrequency("BIANNUALLY");

    /** Data is updated every year. */
    @UML(identifier = "annually", obligation = CONDITIONAL, specification = ISO_19115)
    public static final MaintenanceFrequency ANNUALLY = new MaintenanceFrequency("ANNUALLY");

    /** Data is updated as deemed necessary. */
    @UML(identifier = "asNeeded", obligation = CONDITIONAL, specification = ISO_19115)
    public static final MaintenanceFrequency AS_NEEDED = new MaintenanceFrequency("AS_NEEDED");

    /** Data is updated in intervals that are uneven in duration. */
    @UML(identifier = "irregular", obligation = CONDITIONAL, specification = ISO_19115)
    public static final MaintenanceFrequency IRREGULAR = new MaintenanceFrequency("IRREGULAR");

    /** There are no plans to update the data. */
    @UML(identifier = "notPlanned", obligation = CONDITIONAL, specification = ISO_19115)
    public static final MaintenanceFrequency NOT_PLANNED = new MaintenanceFrequency("NOT_PLANNED");

    /** Frequency of maintenance for the data is not known */
    @UML(identifier = "unknow", obligation = CONDITIONAL, specification = ISO_19115)
    public static final MaintenanceFrequency UNKNOW = new MaintenanceFrequency("UNKNOW");

    /**
     * Constructs an enum with the given name. The new enum is automatically added to the list
     * returned by {@link #values}.
     *
     * @param name The enum name. This name must not be in use by an other enum of this type.
     */
    private MaintenanceFrequency(final String name) {
        super(name, VALUES);
    }

    /**
     * Returns the list of {@code MaintenanceFrequency}s.
     *
     * @return The list of codes declared in the current JVM.
     */
    public static MaintenanceFrequency[] values() {
        synchronized (VALUES) {
            return VALUES.toArray(new MaintenanceFrequency[VALUES.size()]);
        }
    }

    /** Returns the list of enumerations of the same kind than this enum. */
    public MaintenanceFrequency[] family() {
        return values();
    }

    /**
     * Returns the maintenance frequency that matches the given string, or returns a new one if none
     * match it.
     *
     * @param code The name of the code to fetch or to create.
     * @return A code matching the given name.
     */
    public static MaintenanceFrequency valueOf(String code) {
        return valueOf(MaintenanceFrequency.class, code);
    }
}