Source Code Cross Referenced for DefaultEngineeringDatum.java in  » GIS » GeoTools-2.4.1 » org » geotools » referencing » datum » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » GeoTools 2.4.1 » org.geotools.referencing.datum 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *    GeoTools - OpenSource mapping toolkit
003:         *    http://geotools.org
004:         *    (C) 2003-2006, GeoTools Project Managment Committee (PMC)
005:         *    (C) 2001, Institut de Recherche pour le Développement
006:         *   
007:         *    This library is free software; you can redistribute it and/or
008:         *    modify it under the terms of the GNU Lesser General Public
009:         *    License as published by the Free Software Foundation;
010:         *    version 2.1 of the License.
011:         *
012:         *    This library is distributed in the hope that it will be useful,
013:         *    but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
015:         *    Lesser General Public License for more details.
016:         *
017:         *    This package contains documentation from OpenGIS specifications.
018:         *    OpenGIS consortium's work is fully acknowledged here.
019:         */
020:        package org.geotools.referencing.datum;
021:
022:        // J2SE dependencies
023:        import java.util.Collections;
024:        import java.util.HashMap;
025:        import java.util.Map;
026:
027:        // OpenGIS dependencies
028:        import org.opengis.referencing.datum.EngineeringDatum;
029:
030:        // Geotools dependencies
031:        import org.geotools.referencing.AbstractIdentifiedObject;
032:        import org.geotools.referencing.wkt.Formatter;
033:        import org.geotools.resources.i18n.Vocabulary;
034:        import org.geotools.resources.i18n.VocabularyKeys;
035:        import org.geotools.util.LocalName;
036:
037:        /**
038:         * Defines the origin of an engineering coordinate reference system. An engineering datum is used
039:         * in a region around that origin. This origin can be fixed with respect to the earth (such as a
040:         * defined point at a construction site), or be a defined point on a moving vehicle (such as on a
041:         * ship or satellite).
042:         *
043:         * @since 2.1
044:         * @source $URL: http://svn.geotools.org/geotools/tags/2.4.1/modules/library/referencing/src/main/java/org/geotools/referencing/datum/DefaultEngineeringDatum.java $
045:         * @version $Id: DefaultEngineeringDatum.java 20874 2006-08-07 10:00:01Z jgarnett $
046:         * @author Martin Desruisseaux
047:         */
048:        public class DefaultEngineeringDatum extends AbstractDatum implements 
049:                EngineeringDatum {
050:            /**
051:             * Serial number for interoperability with different versions.
052:             */
053:            private static final long serialVersionUID = 1498304918725248637L;
054:
055:            /**
056:             * An engineering datum for unknow coordinate reference system. Such CRS are usually
057:             * assumed cartesian, but will not have any transformation path to other CRS.
058:             *
059:             * @see org.geotools.referencing.crs.DefaultEngineeringCRS#CARTESIAN_2D
060:             * @see org.geotools.referencing.crs.DefaultEngineeringCRS#CARTESIAN_3D
061:             */
062:            public static final DefaultEngineeringDatum UNKNOW;
063:            static {
064:                final Map properties = new HashMap(4);
065:                properties.put(NAME_KEY, "Unknow");
066:                properties.put(ALIAS_KEY, new LocalName(Vocabulary
067:                        .formatInternational(VocabularyKeys.UNKNOW)));
068:                UNKNOW = new DefaultEngineeringDatum(properties);
069:            }
070:
071:            /**
072:             * Constructs a new datum with the same values than the specified one.
073:             * This copy constructor provides a way to wrap an arbitrary implementation into a
074:             * Geotools one or a user-defined one (as a subclass), usually in order to leverage
075:             * some implementation-specific API. This constructor performs a shallow copy,
076:             * i.e. the properties are not cloned.
077:             *
078:             * @since 2.2
079:             */
080:            public DefaultEngineeringDatum(final EngineeringDatum datum) {
081:                super (datum);
082:            }
083:
084:            /**
085:             * Constructs an engineering datum from a name.
086:             *
087:             * @param name The datum name.
088:             */
089:            public DefaultEngineeringDatum(final String name) {
090:                this (Collections.singletonMap(NAME_KEY, name));
091:            }
092:
093:            /**
094:             * Constructs an engineering datum from a set of properties. The properties map is given
095:             * unchanged to the {@linkplain AbstractDatum#AbstractDatum(Map) super-class constructor}.
096:             *
097:             * @param properties Set of properties. Should contains at least <code>"name"</code>.
098:             */
099:            public DefaultEngineeringDatum(final Map properties) {
100:                super (properties);
101:            }
102:
103:            /**
104:             * Compare this datum with the specified object for equality.
105:             *
106:             * @param  object The object to compare to {@code this}.
107:             * @param  compareMetadata {@code true} for performing a strict comparaison, or
108:             *         {@code false} for comparing only properties relevant to transformations.
109:             * @return {@code true} if both objects are equal.
110:             */
111:            public boolean equals(final AbstractIdentifiedObject object,
112:                    final boolean compareMetadata) {
113:                if (object == this ) {
114:                    return true; // Slight optimization.
115:                }
116:                return super .equals(object, compareMetadata);
117:            }
118:
119:            /**
120:             * Format the inner part of a
121:             * <A HREF="http://geoapi.sourceforge.net/snapshot/javadoc/org/opengis/referencing/doc-files/WKT.html"><cite>Well
122:             * Known Text</cite> (WKT)</A> element.
123:             *
124:             * @param  formatter The formatter to use.
125:             * @return The WKT element name, which is "LOCAL_DATUM"
126:             */
127:            protected String formatWKT(final Formatter formatter) {
128:                super .formatWKT(formatter);
129:                return "LOCAL_DATUM";
130:            }
131:        }
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