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The main module contains the GeoTools public interfaces that are used by other GeoTools modules (and GeoTools applications). Where possible we make use industry standard terms as provided by OGC and ISO standards. The formal GeoTools public api consists of gt-metadata, jts and the gt-main module. The main module contains the default implementations that are available provided to other GeoTools modules using our factory system. Factories are obtained from an appropriate FactoryFinder, giving applications a chance configure the factory used using the Factory Hints facilities. FilterFactory ff = CommonFactoryFinder.getFilterFactory(); Expression expr = ff.add( expression1, expression2 ); If you find yourself using implementation specific classes chances are you doing it wrong: Expression expr = new AddImpl( expression1, expressiom2 );

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/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2008, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library 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;
 *    version 2.1 of the License.
 *
 *    This library 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.
 */
package org.geotools.temporal.object;

import java.util.Arrays;
import org.geotools.util.Utilities;
import org.opengis.temporal.CalendarDate;
import org.opengis.temporal.CalendarEra;
import org.opengis.temporal.IndeterminateValue;
import org.opengis.temporal.TemporalReferenceSystem;
import org.opengis.util.InternationalString;

/**
 * A data type that shall be used to identify temporal position within a calendar.
 *
 * @author Mehdi Sidhoum (Geomatys)
 */
public class DefaultCalendarDate extends DefaultTemporalPosition implements CalendarDate {

    /** This is the name of the calendar era to which the date is referenced. */
    private InternationalString calendarEraName;
    /**
     * This is a sequence of positive integers in which the first integeridentifies a specific
     * instance of the unit used at the highest level of the calendar hierarchy, the second integer
     * identifies a specific instance of the unit used at the next lower level in the hierarchy, and
     * so on. The format defined in ISO 8601 for dates in the Gregorian calendar may be used for any
     * date that is composed of values for year, month and day.
     */
    private int[] calendarDate;

    public DefaultCalendarDate(
            TemporalReferenceSystem frame,
            IndeterminateValue indeterminatePosition,
            InternationalString calendarEraName,
            int[] calendarDate) {
        super(frame, indeterminatePosition);
        this.calendarDate = calendarDate;
        this.calendarEraName = calendarEraName;
    }

    /**
     * Provides the name of the {@linkplain CalendarEra calendar era} to which the date is
     * referenced.
     */
    public InternationalString getCalendarEraName() {
        return calendarEraName;
    }

    /**
     * Provides a sequence of integers in which the first integer identifies a specific instance of
     * the unit used at the highest level of the calendar hierarchy, the second integer identifies a
     * specific instance of the unit used at the next lower level in the hierarchy, and so on. The
     * format defined in ISO 8601 for dates in the Gregorian calendar may be used for any date that
     * is composed of values for year, month and day.
     */
    public int[] getCalendarDate() {
        return calendarDate;
    }

    public void setCalendarEraName(InternationalString calendarEraName) {
        this.calendarEraName = calendarEraName;
    }

    public void setCalendarDate(int[] calendarDate) {
        this.calendarDate = calendarDate;
    }

    @Override
    public boolean equals(final Object object) {
        if (object == this) {
            return true;
        }
        if (object instanceof DefaultCalendarDate && super.equals(object)) {
            final DefaultCalendarDate that = (DefaultCalendarDate) object;

            return Utilities.equals(this.calendarDate, that.calendarDate)
                    && Utilities.equals(this.calendarEraName, that.calendarEraName);
        }
        return false;
    }

    @Override
    public int hashCode() {
        int hash = 5;
        hash = 37 * hash + Arrays.hashCode(this.calendarDate);
        hash = 37 * hash + (this.calendarEraName != null ? this.calendarEraName.hashCode() : 0);
        return hash;
    }

    @Override
    public String toString() {
        StringBuilder s = new StringBuilder("CalendarDate:").append('\n');
        if (calendarEraName != null) {
            s.append("calendarEraName:").append(calendarEraName).append('\n');
        }
        if (calendarDate != null) {
            s.append("calendarDate:").append(Arrays.toString(calendarDate)).append('\n');
        }
        return s.toString();
    }
}