Source Code Cross Referenced for BaseDateTime.java in  » Development » Joda-Time » org » joda » time » base » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Development » Joda Time » org.joda.time.base 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  Copyright 2001-2005 Stephen Colebourne
003:         *
004:         *  Licensed under the Apache License, Version 2.0 (the "License");
005:         *  you may not use this file except in compliance with the License.
006:         *  You may obtain a copy of the License at
007:         *
008:         *      http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         *  Unless required by applicable law or agreed to in writing, software
011:         *  distributed under the License is distributed on an "AS IS" BASIS,
012:         *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         *  See the License for the specific language governing permissions and
014:         *  limitations under the License.
015:         */
016:        package org.joda.time.base;
017:
018:        import java.io.Serializable;
019:
020:        import org.joda.time.Chronology;
021:        import org.joda.time.DateTimeUtils;
022:        import org.joda.time.DateTimeZone;
023:        import org.joda.time.ReadableDateTime;
024:        import org.joda.time.chrono.ISOChronology;
025:        import org.joda.time.convert.ConverterManager;
026:        import org.joda.time.convert.InstantConverter;
027:
028:        /**
029:         * BaseDateTime is an abstract implementation of ReadableDateTime that stores
030:         * data in <code>long</code> and <code>Chronology</code> fields.
031:         * <p>
032:         * This class should generally not be used directly by API users.
033:         * The {@link ReadableDateTime} interface should be used when different 
034:         * kinds of date/time objects are to be referenced.
035:         * <p>
036:         * BaseDateTime subclasses may be mutable and not thread-safe.
037:         *
038:         * @author Stephen Colebourne
039:         * @author Kandarp Shah
040:         * @author Brian S O'Neill
041:         * @since 1.0
042:         */
043:        public abstract class BaseDateTime extends AbstractDateTime implements 
044:                ReadableDateTime, Serializable {
045:
046:            /** Serialization lock */
047:            private static final long serialVersionUID = -6728882245981L;
048:
049:            /** The millis from 1970-01-01T00:00:00Z */
050:            private long iMillis;
051:            /** The chronology to use */
052:            private Chronology iChronology;
053:
054:            //-----------------------------------------------------------------------
055:            /**
056:             * Constructs an instance set to the current system millisecond time
057:             * using <code>ISOChronology</code> in the default time zone.
058:             */
059:            public BaseDateTime() {
060:                this (DateTimeUtils.currentTimeMillis(), ISOChronology
061:                        .getInstance());
062:            }
063:
064:            /**
065:             * Constructs an instance set to the current system millisecond time
066:             * using <code>ISOChronology</code> in the specified time zone.
067:             * <p>
068:             * If the specified time zone is null, the default zone is used.
069:             *
070:             * @param zone  the time zone, null means default zone
071:             */
072:            public BaseDateTime(DateTimeZone zone) {
073:                this (DateTimeUtils.currentTimeMillis(), ISOChronology
074:                        .getInstance(zone));
075:            }
076:
077:            /**
078:             * Constructs an instance set to the current system millisecond time
079:             * using the specified chronology.
080:             * <p>
081:             * If the chronology is null, <code>ISOChronology</code>
082:             * in the default time zone is used.
083:             *
084:             * @param chronology  the chronology, null means ISOChronology in default zone
085:             */
086:            public BaseDateTime(Chronology chronology) {
087:                this (DateTimeUtils.currentTimeMillis(), chronology);
088:            }
089:
090:            //-----------------------------------------------------------------------
091:            /**
092:             * Constructs an instance set to the milliseconds from 1970-01-01T00:00:00Z
093:             * using <code>ISOChronology</code> in the default time zone.
094:             *
095:             * @param instant  the milliseconds from 1970-01-01T00:00:00Z
096:             */
097:            public BaseDateTime(long instant) {
098:                this (instant, ISOChronology.getInstance());
099:            }
100:
101:            /**
102:             * Constructs an instance set to the milliseconds from 1970-01-01T00:00:00Z
103:             * using <code>ISOChronology</code> in the specified time zone.
104:             * <p>
105:             * If the specified time zone is null, the default zone is used.
106:             *
107:             * @param instant  the milliseconds from 1970-01-01T00:00:00Z
108:             * @param zone  the time zone, null means default zone
109:             */
110:            public BaseDateTime(long instant, DateTimeZone zone) {
111:                this (instant, ISOChronology.getInstance(zone));
112:            }
113:
114:            /**
115:             * Constructs an instance set to the milliseconds from 1970-01-01T00:00:00Z
116:             * using the specified chronology.
117:             * <p>
118:             * If the chronology is null, <code>ISOChronology</code>
119:             * in the default time zone is used.
120:             *
121:             * @param instant  the milliseconds from 1970-01-01T00:00:00Z
122:             * @param chronology  the chronology, null means ISOChronology in default zone
123:             */
124:            public BaseDateTime(long instant, Chronology chronology) {
125:                super ();
126:                iChronology = checkChronology(chronology);
127:                iMillis = checkInstant(instant, iChronology);
128:            }
129:
130:            //-----------------------------------------------------------------------
131:            /**
132:             * Constructs an instance from an Object that represents a datetime,
133:             * forcing the time zone to that specified.
134:             * <p>
135:             * If the object contains no chronology, <code>ISOChronology</code> is used.
136:             * If the specified time zone is null, the default zone is used.
137:             * <p>
138:             * The recognised object types are defined in
139:             * {@link org.joda.time.convert.ConverterManager ConverterManager} and
140:             * include ReadableInstant, String, Calendar and Date.
141:             *
142:             * @param instant  the datetime object
143:             * @param zone  the time zone
144:             * @throws IllegalArgumentException if the instant is invalid
145:             */
146:            public BaseDateTime(Object instant, DateTimeZone zone) {
147:                super ();
148:                InstantConverter converter = ConverterManager.getInstance()
149:                        .getInstantConverter(instant);
150:                Chronology chrono = checkChronology(converter.getChronology(
151:                        instant, zone));
152:                iChronology = chrono;
153:                iMillis = checkInstant(converter.getInstantMillis(instant,
154:                        chrono), chrono);
155:            }
156:
157:            /**
158:             * Constructs an instance from an Object that represents a datetime,
159:             * using the specified chronology.
160:             * <p>
161:             * If the chronology is null, ISO in the default time zone is used.
162:             * <p>
163:             * The recognised object types are defined in
164:             * {@link org.joda.time.convert.ConverterManager ConverterManager} and
165:             * include ReadableInstant, String, Calendar and Date.
166:             *
167:             * @param instant  the datetime object
168:             * @param chronology  the chronology
169:             * @throws IllegalArgumentException if the instant is invalid
170:             */
171:            public BaseDateTime(Object instant, Chronology chronology) {
172:                super ();
173:                InstantConverter converter = ConverterManager.getInstance()
174:                        .getInstantConverter(instant);
175:                iChronology = checkChronology(converter.getChronology(instant,
176:                        chronology));
177:                iMillis = checkInstant(converter.getInstantMillis(instant,
178:                        chronology), iChronology);
179:            }
180:
181:            //-----------------------------------------------------------------------
182:            /**
183:             * Constructs an instance from datetime field values
184:             * using <code>ISOChronology</code> in the default time zone.
185:             *
186:             * @param year  the year
187:             * @param monthOfYear  the month of the year
188:             * @param dayOfMonth  the day of the month
189:             * @param hourOfDay  the hour of the day
190:             * @param minuteOfHour  the minute of the hour
191:             * @param secondOfMinute  the second of the minute
192:             * @param millisOfSecond  the millisecond of the second
193:             */
194:            public BaseDateTime(int year, int monthOfYear, int dayOfMonth,
195:                    int hourOfDay, int minuteOfHour, int secondOfMinute,
196:                    int millisOfSecond) {
197:                this (year, monthOfYear, dayOfMonth, hourOfDay, minuteOfHour,
198:                        secondOfMinute, millisOfSecond, ISOChronology
199:                                .getInstance());
200:            }
201:
202:            /**
203:             * Constructs an instance from datetime field values
204:             * using <code>ISOChronology</code> in the specified time zone.
205:             * <p>
206:             * If the specified time zone is null, the default zone is used.
207:             *
208:             * @param year  the year
209:             * @param monthOfYear  the month of the year
210:             * @param dayOfMonth  the day of the month
211:             * @param hourOfDay  the hour of the day
212:             * @param minuteOfHour  the minute of the hour
213:             * @param secondOfMinute  the second of the minute
214:             * @param millisOfSecond  the millisecond of the second
215:             * @param zone  the time zone, null means default time zone
216:             */
217:            public BaseDateTime(int year, int monthOfYear, int dayOfMonth,
218:                    int hourOfDay, int minuteOfHour, int secondOfMinute,
219:                    int millisOfSecond, DateTimeZone zone) {
220:                this (year, monthOfYear, dayOfMonth, hourOfDay, minuteOfHour,
221:                        secondOfMinute, millisOfSecond, ISOChronology
222:                                .getInstance(zone));
223:            }
224:
225:            /**
226:             * Constructs an instance from datetime field values
227:             * using the specified chronology.
228:             * <p>
229:             * If the chronology is null, <code>ISOChronology</code>
230:             * in the default time zone is used.
231:             *
232:             * @param year  the year
233:             * @param monthOfYear  the month of the year
234:             * @param dayOfMonth  the day of the month
235:             * @param hourOfDay  the hour of the day
236:             * @param minuteOfHour  the minute of the hour
237:             * @param secondOfMinute  the second of the minute
238:             * @param millisOfSecond  the millisecond of the second
239:             * @param chronology  the chronology, null means ISOChronology in default zone
240:             */
241:            public BaseDateTime(int year, int monthOfYear, int dayOfMonth,
242:                    int hourOfDay, int minuteOfHour, int secondOfMinute,
243:                    int millisOfSecond, Chronology chronology) {
244:                super ();
245:                iChronology = checkChronology(chronology);
246:                long instant = iChronology.getDateTimeMillis(year, monthOfYear,
247:                        dayOfMonth, hourOfDay, minuteOfHour, secondOfMinute,
248:                        millisOfSecond);
249:                iMillis = checkInstant(instant, iChronology);
250:            }
251:
252:            //-----------------------------------------------------------------------
253:            /**
254:             * Checks the specified chronology before storing it, potentially altering it.
255:             * This method must not access any instance variables.
256:             * <p>
257:             * This implementation converts nulls to ISOChronology in the default zone.
258:             *
259:             * @param chronology  the chronology to use, may be null
260:             * @return the chronology to store in this datetime, not null
261:             */
262:            protected Chronology checkChronology(Chronology chronology) {
263:                return DateTimeUtils.getChronology(chronology);
264:            }
265:
266:            /**
267:             * Checks the specified instant before storing it, potentially altering it.
268:             * This method must not access any instance variables.
269:             * <p>
270:             * This implementation simply returns the instant.
271:             *
272:             * @param instant  the milliseconds from 1970-01-01T00:00:00Z to round
273:             * @param chronology  the chronology to use, not null
274:             * @return the instant to store in this datetime
275:             */
276:            protected long checkInstant(long instant, Chronology chronology) {
277:                return instant;
278:            }
279:
280:            //-----------------------------------------------------------------------
281:            /**
282:             * Gets the milliseconds of the datetime instant from the Java epoch
283:             * of 1970-01-01T00:00:00Z.
284:             * 
285:             * @return the number of milliseconds since 1970-01-01T00:00:00Z
286:             */
287:            public long getMillis() {
288:                return iMillis;
289:            }
290:
291:            /**
292:             * Gets the chronology of the datetime.
293:             * 
294:             * @return the Chronology that the datetime is using
295:             */
296:            public Chronology getChronology() {
297:                return iChronology;
298:            }
299:
300:            //-----------------------------------------------------------------------
301:            /**
302:             * Sets the milliseconds of the datetime.
303:             * <p>
304:             * All changes to the millisecond field occurs via this method.
305:             * Override and block this method to make a subclass immutable.
306:             *
307:             * @param instant  the milliseconds since 1970-01-01T00:00:00Z to set the datetime to
308:             */
309:            protected void setMillis(long instant) {
310:                iMillis = checkInstant(instant, iChronology);
311:            }
312:
313:            /**
314:             * Sets the chronology of the datetime.
315:             * <p>
316:             * All changes to the chronology field occurs via this method.
317:             * Override and block this method to make a subclass immutable.
318:             *
319:             * @param chronology  the chronology to set
320:             */
321:            protected void setChronology(Chronology chronology) {
322:                iChronology = checkChronology(chronology);
323:            }
324:
325:        }
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