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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) 2002-2016, 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.feature;

import org.geotools.geometry.jts.ReferencedEnvelope;
import org.geotools.util.Utilities;
import org.locationtech.jts.geom.Geometry;
import org.locationtech.jts.geom.GeometryCollection;
import org.locationtech.jts.geom.MultiLineString;
import org.locationtech.jts.geom.MultiPoint;
import org.locationtech.jts.geom.MultiPolygon;
import org.opengis.feature.GeometryAttribute;
import org.opengis.feature.type.GeometryDescriptor;
import org.opengis.feature.type.GeometryType;
import org.opengis.filter.identity.Identifier;
import org.opengis.geometry.BoundingBox;
import org.opengis.referencing.crs.CoordinateReferenceSystem;

/**
 * TODO: rename to GeometricAttribute Provides ...TODO summary sentence
 *
 * TODO Description
 *
 * 

 *
 * 
Example Use:
 *
 * 

 *         GeometryAttributeType x = new GeometryAttributeType( ... );
 *         TODO code example
 * 
 *
 * @author Leprosy
 * @since 0.3 TODO: test wkt geometry parse.
 */
public class GeometryAttributeImpl extends AttributeImpl implements GeometryAttribute {
    /** bounds, derived */
    protected BoundingBox bounds;

    public GeometryAttributeImpl(Object content, GeometryDescriptor descriptor, Identifier id) {
        super(content, descriptor, id);
    }

    public GeometryType getType() {
        return (GeometryType) super.getType();
    }

    public GeometryDescriptor getDescriptor() {
        return (GeometryDescriptor) super.getDescriptor();
    }

    public Geometry getValue() {
        return (Geometry) super.getValue();
    }

    public void setValue(Object newValue) throws IllegalArgumentException, IllegalStateException {
        super.setValue((Geometry) newValue);
    }

    public void setValue(Geometry geometry) {
        super.setValue(geometry);
    }

    /** Set the bounds for the contained geometry. */
    public synchronized void setBounds(BoundingBox bbox) {
        bounds = bbox;
    }

    /**
     * Returns the non null envelope of this attribute. If the attribute's geometry is null
     *  the returned Envelope isNull() is true.
     */
    public synchronized BoundingBox getBounds() {
        if (bounds == null) {
            ReferencedEnvelope bbox =
                    new ReferencedEnvelope(getType().getCoordinateReferenceSystem());
            Geometry geom = (Geometry) getValue();
            if (geom != null) {
                bbox.expandToInclude(geom.getEnvelopeInternal());
            } else {
                bbox.setToNull();
            }
            bounds = bbox;
        }
        return bounds;
    }

    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }

        if (!(o instanceof GeometryAttributeImpl)) {
            return false;
        }

        GeometryAttributeImpl att = (GeometryAttributeImpl) o;

        if (!Utilities.equals(descriptor, att.descriptor)) return false;

        if (!Utilities.equals(id, att.id)) return false;

        if (value != null && att.value != null) {
            // another lovley jts thing... comparing geometry collections that
            // arent multi point/line/poly throws an exception, so we need to
            // do that comparison
            if (att.value instanceof GeometryCollection
                    && !(att.value instanceof MultiPoint)
                    && !(att.value instanceof MultiLineString)
                    && !(att.value instanceof MultiPolygon)) {

                if (value instanceof GeometryCollection) {
                    // compare the two collections
                    GeometryCollection c1 = (GeometryCollection) value;
                    GeometryCollection c2 = (GeometryCollection) att.value;

                    if (c1.getNumGeometries() != c2.getNumGeometries()) {
                        return false;
                    }

                    for (int i = 0; i < c1.getNumGeometries(); i++) {
                        Geometry g1 = c1.getGeometryN(i);
                        Geometry g2 = c2.getGeometryN(i);

                        if (!g1.equalsExact(g2)) {
                            return false;
                        }
                    }

                    return true;
                } else {
                    return false;
                }
            }
            if (!((Geometry) value).equalsExact((Geometry) att.value)) {
                return false;
            }
        } else {
            return Utilities.deepEquals(value, this.value);
        }

        return true;
    }

    public int hashCode() {
        int hash = descriptor.hashCode();

        if (id != null) {
            hash += 37 * id.hashCode();
        }

        return hash;
    }

    public String toString() {
        StringBuffer sb = new StringBuffer(getClass().getSimpleName()).append(":");
        sb.append(getDescriptor().getName().getLocalPart());
        CoordinateReferenceSystem crs = getDescriptor().getType().getCoordinateReferenceSystem();
        if (!getDescriptor()
                        .getName()
                        .getLocalPart()
                        .equals(getDescriptor().getType().getName().getLocalPart())
                || id != null
                || crs != null) {
            sb.append("<");
            sb.append(getDescriptor().getType().getName().getLocalPart());
            if (id != null) {
                sb.append(" id=");
                sb.append(id);
            }
            if (crs != null) {
                sb.append(" crs=");
                sb.append(crs);
            }
            if (id != null) {
                sb.append(" id=");
                sb.append(id);
            }
            sb.append(">");
        }
        sb.append("=");
        sb.append(value);
        return sb.toString();
    }
}