Source Code Cross Referenced for RFC977DateFormat.java in  » Net » james-2.3.1 » org » apache » mailet » dates » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » james 2.3.1 » org.apache.mailet.dates 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /****************************************************************
002:         * Licensed to the Apache Software Foundation (ASF) under one   *
003:         * or more contributor license agreements.  See the NOTICE file *
004:         * distributed with this work for additional information        *
005:         * regarding copyright ownership.  The ASF licenses this file   *
006:         * to you under the Apache License, Version 2.0 (the            *
007:         * "License"); you may not use this file except in compliance   *
008:         * with the License.  You may obtain a copy of the License at   *
009:         *                                                              *
010:         *   http://www.apache.org/licenses/LICENSE-2.0                 *
011:         *                                                              *
012:         * Unless required by applicable law or agreed to in writing,   *
013:         * software distributed under the License is distributed on an  *
014:         * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
015:         * KIND, either express or implied.  See the License for the    *
016:         * specific language governing permissions and limitations      *
017:         * under the License.                                           *
018:         ****************************************************************/package org.apache.mailet.dates;
019:
020:        import java.text.ParseException;
021:        import java.util.Date;
022:        import java.util.Locale;
023:        import java.util.TimeZone;
024:
025:        /**
026:         * A thread-safe date formatting class to produce dates formatted in accord with the
027:         * specifications of RFC 977.
028:         *
029:         */
030:        public class RFC977DateFormat implements  SimplifiedDateFormat {
031:
032:            /**
033:             * Internal date formatter for long date formats
034:             */
035:            private final SynchronizedDateFormat internalLongDateFormat;
036:
037:            /**
038:             * Internal date formatter for short date formats
039:             */
040:            private final SynchronizedDateFormat internalShortDateFormat;
041:
042:            /**
043:             * Constructor for RFC977DateFormat
044:             */
045:            public RFC977DateFormat() {
046:                internalLongDateFormat = new SynchronizedDateFormat(
047:                        "yyyyMMdd HHmmss", Locale.ENGLISH);
048:                internalShortDateFormat = new SynchronizedDateFormat(
049:                        "yyMMdd HHmmss", Locale.ENGLISH);
050:            }
051:
052:            /**
053:             * This method returns the long form of the RFC977 Date
054:             *
055:             * @return java.lang.String
056:             * @param d Date
057:             */
058:            public String format(Date d) {
059:                return internalLongDateFormat.format(d);
060:            }
061:
062:            /**
063:             * Parses text from the beginning of the given string to produce a date.
064:             * The method may not use the entire text of the given string.
065:             * <p>
066:             * This method is designed to be thread safe, so we wrap our delegated
067:             * parse method in an appropriate synchronized block.
068:             *
069:             * @param source A <code>String</code> whose beginning should be parsed.
070:             * @return A <code>Date</code> parsed from the string.
071:             * @throws ParseException if the beginning of the specified string
072:             *         cannot be parsed.
073:             */
074:            public Date parse(String source) throws ParseException {
075:                source = source.trim();
076:                if (source.indexOf(' ') == 6) {
077:                    return internalShortDateFormat.parse(source);
078:                } else {
079:                    return internalLongDateFormat.parse(source);
080:                }
081:            }
082:
083:            /**
084:             * Sets the time zone of this SynchronizedDateFormat object.
085:             * @param zone the given new time zone.
086:             */
087:            public void setTimeZone(TimeZone zone) {
088:                synchronized (this ) {
089:                    internalShortDateFormat.setTimeZone(zone);
090:                    internalLongDateFormat.setTimeZone(zone);
091:                }
092:            }
093:
094:            /**
095:             * Gets the time zone.
096:             * @return the time zone associated with this SynchronizedDateFormat.
097:             */
098:            public TimeZone getTimeZone() {
099:                synchronized (this ) {
100:                    return internalShortDateFormat.getTimeZone();
101:                }
102:            }
103:
104:            /**
105:             * Specify whether or not date/time parsing is to be lenient.  With
106:             * lenient parsing, the parser may use heuristics to interpret inputs that
107:             * do not precisely match this object's format.  With strict parsing,
108:             * inputs must match this object's format.
109:             * @param lenient when true, parsing is lenient
110:             * @see java.util.Calendar#setLenient
111:             */
112:            public void setLenient(boolean lenient) {
113:                synchronized (this ) {
114:                    internalShortDateFormat.setLenient(lenient);
115:                    internalLongDateFormat.setLenient(lenient);
116:                }
117:            }
118:
119:            /**
120:             * Tell whether date/time parsing is to be lenient.
121:             * @return whether this SynchronizedDateFormat is lenient.
122:             */
123:            public boolean isLenient() {
124:                synchronized (this ) {
125:                    return internalShortDateFormat.isLenient();
126:                }
127:            }
128:
129:            /**
130:             * Overrides equals
131:             */
132:            public boolean equals(Object obj) {
133:                if (this  == obj) {
134:                    return true;
135:                }
136:                if (!(obj instanceof  RFC977DateFormat)) {
137:                    return false;
138:                }
139:                RFC977DateFormat theOtherRFC977DateFormat = (RFC977DateFormat) obj;
140:                synchronized (this ) {
141:                    return ((internalShortDateFormat
142:                            .equals(theOtherRFC977DateFormat.internalShortDateFormat)) && (internalLongDateFormat
143:                            .equals(theOtherRFC977DateFormat.internalLongDateFormat)));
144:                }
145:            }
146:
147:            /**
148:             * Overrides hashCode
149:             */
150:            public int hashCode() {
151:                return (int) (internalLongDateFormat.hashCode() & internalShortDateFormat
152:                        .hashCode());
153:            }
154:
155:        }
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