Source Code Cross Referenced for MeasurementRange.java in  » GIS » GeoTools-2.4.1 » org » geotools » util » 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.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *    GeoTools - OpenSource mapping toolkit
003:         *    http://geotools.org
004:         *    (C) 2007, Geotools Project Managment Committee (PMC)
005:         *    (C) 2007, Geomatys
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; either
010:         *    version 2.1 of the License, or (at your option) any later version.
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:        package org.geotools.util;
018:
019:        import javax.media.jai.util.Range;
020:        import javax.units.ConversionException;
021:        import javax.units.Converter;
022:        import javax.units.Unit;
023:
024:        import org.geotools.resources.Utilities;
025:        import org.geotools.resources.ClassChanger;
026:
027:        /**
028:         * A range of numbers associated with a unit of measurement. Unit conversions are applied as
029:         * needed by {@linkplain #union union} and {@linkplain #intersect intersection} operations.
030:         *
031:         * @since 2.4
032:         * @source $URL: http://svn.geotools.org/geotools/tags/2.4.1/modules/library/metadata/src/main/java/org/geotools/util/MeasurementRange.java $
033:         * @version $Id: MeasurementRange.java 26601 2007-08-19 23:16:35Z desruisseaux $
034:         * @author Martin Desruisseaux
035:         */
036:        public class MeasurementRange extends NumberRange {
037:            /**
038:             * Serial number for interoperability with different versions.
039:             */
040:            private static final long serialVersionUID = 3980319420337513745L;
041:
042:            /**
043:             * The units of measurement, or {@code null} if unknown.
044:             */
045:            private final Unit units;
046:
047:            /**
048:             * Constructs an inclusive range of {@code float} values.
049:             *
050:             * @param minimum The minimum value, inclusive.
051:             * @param maximum The maximum value, <strong>inclusive</strong>.
052:             * @param units   The units of measurement, or {@code null} if unknown.
053:             */
054:            public MeasurementRange(final float minimum, final float maximum,
055:                    final Unit units) {
056:                super (minimum, maximum);
057:                this .units = units;
058:            }
059:
060:            /**
061:             * Constructs a range of {@code float} values.
062:             *
063:             * @param minimum The minimum value.
064:             * @param isMinIncluded Defines whether the minimum value is included in the Range.
065:             * @param maximum The maximum value.
066:             * @param isMaxIncluded Defines whether the maximum value is included in the Range.
067:             * @param units   The units of measurement, or {@code null} if unknown.
068:             */
069:            public MeasurementRange(final float minimum,
070:                    final boolean isMinIncluded, final float maximum,
071:                    final boolean isMaxIncluded, final Unit units) {
072:                super (minimum, isMinIncluded, maximum, isMaxIncluded);
073:                this .units = units;
074:            }
075:
076:            /**
077:             * Constructs an inclusive range of {@code double} values.
078:             *
079:             * @param minimum The minimum value, inclusive.
080:             * @param maximum The maximum value, <strong>inclusive</strong>.
081:             * @param units   The units of measurement, or {@code null} if unknown.
082:             */
083:            public MeasurementRange(final double minimum, final double maximum,
084:                    final Unit units) {
085:                super (minimum, maximum);
086:                this .units = units;
087:            }
088:
089:            /**
090:             * Constructs a range of {@code double} values.
091:             *
092:             * @param minimum The minimum value.
093:             * @param isMinIncluded Defines whether the minimum value is included in the Range.
094:             * @param maximum The maximum value.
095:             * @param isMaxIncluded Defines whether the maximum value is included in the Range.
096:             * @param units   The units of measurement, or {@code null} if unknown.
097:             */
098:            public MeasurementRange(final double minimum,
099:                    final boolean isMinIncluded, final double maximum,
100:                    final boolean isMaxIncluded, final Unit units) {
101:                super (minimum, isMinIncluded, maximum, isMaxIncluded);
102:                this .units = units;
103:            }
104:
105:            /**
106:             * Constructs a range of {@link Number} objects.
107:             *
108:             * @param type The element class, usually one of {@link Byte}, {@link Short},
109:             *             {@link Integer}, {@link Long}, {@link Float} or {@link Double}.
110:             * @param minimum The minimum value.
111:             * @param isMinIncluded Defines whether the minimum value is included in the Range.
112:             * @param maximum The maximum value.
113:             * @param isMaxIncluded Defines whether the maximum value is included in the Range.
114:             * @param units   The units of measurement, or {@code null} if unknown.
115:             */
116:            public MeasurementRange(final Class type, final Number minimum,
117:                    final boolean isMinIncluded, final Number maximum,
118:                    final boolean isMaxIncluded, final Unit units) {
119:                super (type, minimum, isMinIncluded, maximum, isMaxIncluded);
120:                this .units = units;
121:            }
122:
123:            /**
124:             * Constructs a range with the same values than the specified range.
125:             *
126:             * @param range The range to copy. The elements must be {@link Number} instances.
127:             * @param units The units of measurement, or {@code null} if unknown.
128:             * @throws ClassCastException if some elements are not instances of {@link Number}.
129:             */
130:            public MeasurementRange(final Range range, final Unit units)
131:                    throws ClassCastException {
132:                super (range);
133:                this .units = units;
134:            }
135:
136:            /**
137:             * Constructs a range with the same values than the specified range,
138:             * casted to the specified type.
139:             *
140:             * @param type The element class, usually one of {@link Byte}, {@link Short},
141:             *             {@link Integer}, {@link Long}, {@link Float} or {@link Double}.
142:             * @param range The range to copy. The elements must be {@link Number} instances.
143:             * @param units   The units of measurement, or {@code null} if unknown.
144:             * @throws ClassCastException if some elements are not instances of {@link Number}.
145:             */
146:            private MeasurementRange(final Class type, final Range range,
147:                    final Unit units) throws ClassCastException {
148:                super (type, range);
149:                this .units = units;
150:            }
151:
152:            /**
153:             * Returns the units of measurement, or {@code null} if unknown.
154:             */
155:            public final Unit getUnits() {
156:                return units;
157:            }
158:
159:            /**
160:             * Converts this range to the specified units. If this measurement range has null units,
161:             * then the specified target units are simply assigned to the returned range with no
162:             * other changes.
163:             *
164:             * @param  targetUnit the target units.
165:             * @return The converted range, or {@code this} if no conversion is needed.
166:             * @throws ConversionException if the target units are not compatible with
167:             *         this {@linkplain #getUnits range units}.
168:             */
169:            public MeasurementRange convertTo(final Unit targetUnits)
170:                    throws ConversionException {
171:                return convertAndCast(getElementClass(), targetUnits);
172:            }
173:
174:            /**
175:             * Casts the specified range to the specified type. If this class is associated to a unit of
176:             * measurement, then this method convert the {@code range} units to the same units than this
177:             * instance.
178:             * 
179:             * @param type The class to cast to. Must be one of {@link Byte}, {@link Short},
180:             *             {@link Integer}, {@link Long}, {@link Float} or {@link Double}.
181:             * @return The casted range, or {@code range} if no cast is needed.
182:             */
183:            //@Override
184:            NumberRange convertAndCast(final Range range, final Class type) {
185:                if (range instanceof  MeasurementRange) {
186:                    return ((MeasurementRange) range).convertAndCast(type,
187:                            units);
188:                } else {
189:                    return super .convertAndCast(range, type);
190:                }
191:            }
192:
193:            /**
194:             * Casts this range to the specified type and converts to the specified units.
195:             * 
196:             * @param  type The class to cast to. Must be one of {@link Byte}, {@link Short},
197:             *             {@link Integer}, {@link Long}, {@link Float} or {@link Double}.
198:             * @param  targetUnit the target units.
199:             * @return The casted range, or {@code this}.
200:             * @throws ConversionException if the target units are not compatible with
201:             *         this {@linkplain #getUnits range units}.
202:             */
203:            private MeasurementRange convertAndCast(final Class type,
204:                    final Unit targetUnits) throws ConversionException {
205:                if (targetUnits == null || targetUnits.equals(units)) {
206:                    if (type.equals(getElementClass())) {
207:                        return this ;
208:                    } else {
209:                        return new MeasurementRange(type, this , units);
210:                    }
211:                }
212:                if (units == null) {
213:                    return new MeasurementRange(type, this , targetUnits);
214:                }
215:                final Converter converter = units.getConverterTo(targetUnits);
216:                if (converter.equals(Converter.IDENTITY)) {
217:                    return new MeasurementRange(type, this , targetUnits);
218:                }
219:                boolean isMinIncluded = isMinIncluded();
220:                boolean isMaxIncluded = isMaxIncluded();
221:                Double minimum = new Double(converter.convert(getMinimum()));
222:                Double maximum = new Double(converter.convert(getMaximum()));
223:                if (minimum.compareTo(maximum) > 0) {
224:                    final Double td = minimum;
225:                    minimum = maximum;
226:                    maximum = td;
227:                    final boolean tb = isMinIncluded;
228:                    isMinIncluded = isMaxIncluded;
229:                    isMaxIncluded = tb;
230:                }
231:                return new MeasurementRange(type, ClassChanger.cast(minimum,
232:                        type), isMinIncluded, ClassChanger.cast(maximum, type),
233:                        isMaxIncluded, targetUnits);
234:            }
235:
236:            /**
237:             * Compares this range with the specified object for equality.
238:             */
239:            //@Override
240:            public boolean equals(final Object other) {
241:                if (super .equals(other)) {
242:                    if (other instanceof  MeasurementRange) {
243:                        final MeasurementRange that = (MeasurementRange) other;
244:                        return Utilities.equals(this .units, that.units);
245:                    }
246:                    return true;
247:                }
248:                return false;
249:            }
250:
251:            /**
252:             * Returns a string representation of this range.
253:             */
254:            //@Override
255:            public String toString() {
256:                String range = super .toString();
257:                if (units != null) {
258:                    range = range + ' ' + units;
259:                }
260:                return range;
261:            }
262:        }
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