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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 org.geotools.util.Utilities;
import org.opengis.temporal.IndeterminateValue;
import org.opengis.temporal.TemporalCoordinate;
import org.opengis.temporal.TemporalReferenceSystem;

/**
 * A data type that shall be used for identifying temporal position within a temporal coordinate
 * system.
 *
 * @author Mehdi Sidhoum (Geomatys)
 */
public class DefaultTemporalCoordinate extends DefaultTemporalPosition
        implements TemporalCoordinate {

    /**
     * This is the distance from the scale origin expressed as a multiple of the standard interval
     * associated with the temporal coordinate system.
     */
    private Number coordinateValue;

    public DefaultTemporalCoordinate(
            TemporalReferenceSystem frame,
            IndeterminateValue indeterminatePosition,
            Number coordinateValue) {
        super(frame, indeterminatePosition);
        this.coordinateValue = coordinateValue;
    }

    /**
     * Returns the distance from the scale origin expressed as a multiple of the standard interval
     * associated with the temporal coordinate system.
     *
     * @todo Should we return a primitive type?
     */
    public Number getCoordinateValue() {
        return coordinateValue;
    }

    public void setCoordinateValue(Number coordinateValue) {
        this.coordinateValue = coordinateValue;
    }

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

            return Utilities.equals(this.coordinateValue, that.coordinateValue);
        }
        return false;
    }

    @Override
    public int hashCode() {
        int hash = super.hashCode();
        hash = 37 * hash + (this.coordinateValue != null ? this.coordinateValue.hashCode() : 0);
        return hash;
    }

    @Override
    public String toString() {
        StringBuilder s = new StringBuilder("TemporalCoordinate:").append('\n');
        if (getFrame() != null) {
            s.append("TemporalReferenceSystem:").append(getFrame()).append('\n');
        }
        if (getIndeterminatePosition() != null) {
            s.append("IndeterminateValue:").append(getIndeterminatePosition()).append('\n');
        }
        if (coordinateValue != null) {
            s.append("coordinateValue:").append(coordinateValue).append('\n');
        }
        return s.toString();
    }
}