Source Code Cross Referenced for DateUtilities.java in  » Workflow-Engines » obe-1.0 » org » obe » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Workflow Engines » obe 1.0 » org.obe.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*--
002:
003:         Copyright (C) 2002-2005 Adrian Price.
004:         All rights reserved.
005:
006:         Redistribution and use in source and binary forms, with or without
007:         modification, are permitted provided that the following conditions
008:         are met:
009:
010:         1. Redistributions of source code must retain the above copyright
011:            notice, this list of conditions, and the following disclaimer.
012:
013:         2. Redistributions in binary form must reproduce the above copyright
014:            notice, this list of conditions, and the disclaimer that follows
015:            these conditions in the documentation and/or other materials
016:            provided with the distribution.
017:
018:         3. The names "OBE" and "Open Business Engine" must not be used to
019:         	endorse or promote products derived from this software without prior
020:         	written permission.  For written permission, please contact
021:         	adrianprice@sourceforge.net.
022:
023:         4. Products derived from this software may not be called "OBE" or
024:         	"Open Business Engine", nor may "OBE" or "Open Business Engine"
025:         	appear in their name, without prior written permission from
026:         	Adrian Price (adrianprice@users.sourceforge.net).
027:
028:         THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
029:         WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
030:         OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
031:         DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
032:         INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
033:         (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
034:         SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
035:         HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
036:         STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
037:         IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
038:         POSSIBILITY OF SUCH DAMAGE.
039:
040:         For more information on OBE, please see
041:         <http://obe.sourceforge.net/>.
042:
043:         */
044:
045:        package org.obe.util;
046:
047:        import java.text.DateFormat;
048:        import java.text.ParseException;
049:        import java.text.SimpleDateFormat;
050:        import java.util.Date;
051:
052:        /**
053:         * Date formatting and parsing utilities.  This is not a threadsafe class.  Each
054:         * thread must call the {@link #getInstance} method to obtain its own dedicated
055:         * instance.
056:         *
057:         * @author Anthony Eden
058:         * @author Adrian Price
059:         */
060:        public final class DateUtilities {
061:            public static final String DEFAULT_DATE_FORMAT = CommonConfig
062:                    .getDefaultDateFormat();
063:            private static final String[] _jdk13DefaultFormats = {
064:                    DEFAULT_DATE_FORMAT, "yyyy-MM-dd'T'HH:mm:ss",
065:                    // XPDL examples format (yuk).
066:                    "MM/dd/yyyy hh:mm:ss a",
067:                    // Alternative format.
068:                    "yyyy-MM-dd HH:mm:ss z", "yyyy-MM-dd HH:mm:ss",
069:                    "yyyy-MM-ddZ", };
070:            private static final String[] _jdk14DefaultFormats = {
071:                    // xsd:dateTime / ISO 8601 extended date/time formats as per XML Schema.
072:                    DEFAULT_DATE_FORMAT, "yyyy-MM-dd'T'HH:mm:ss",
073:                    // XPDL examples format (yuk).
074:                    "MM/dd/yyyy hh:mm:ss a",
075:                    // Alternative format.
076:                    "yyyy-MM-dd HH:mm:ss z", "yyyy-MM-dd HH:mm:ss",
077:                    "yyyy-MM-ddZ", "yyyy-MM-dd", };
078:            private static final String[] formatStrings;
079:            private static final ThreadLocal _tlsInstance = new ThreadLocal();
080:            private final DateFormat[] _formats;
081:
082:            static {
083:                // We don't support pre-JDK1.3 versions.
084:                boolean jdk13 = System.getProperty("java.version").startsWith(
085:                        "1.3");
086:                formatStrings = jdk13 ? _jdk13DefaultFormats
087:                        : _jdk14DefaultFormats;
088:            }
089:
090:            /**
091:             * Get an instance of the DateUtilities class for the current thread.
092:             *
093:             * @return A DateUtilities instance
094:             */
095:            public static DateUtilities getInstance() {
096:                DateUtilities inst = (DateUtilities) _tlsInstance.get();
097:                if (inst == null) {
098:                    inst = new DateUtilities();
099:                    _tlsInstance.set(inst);
100:                }
101:                return inst;
102:            }
103:
104:            /**
105:             * Construct a new DateUtilities class.
106:             */
107:            private DateUtilities() {
108:                _formats = new DateFormat[formatStrings.length];
109:                for (int i = 0; i < _formats.length; i++)
110:                    _formats[i] = new SimpleDateFormat(formatStrings[i]);
111:            }
112:
113:            public void setFormats(DateFormat[] formats) {
114:                System.arraycopy(formats, 0, _formats, 0, _formats.length);
115:            }
116:
117:            public DateFormat[] getFormats() {
118:                return (DateFormat[]) _formats.clone();
119:            }
120:
121:            /**
122:             * Parse the specified date string.
123:             *
124:             * @param dateString The date string
125:             * @return The Date object.
126:             * @throws ParseException if the date format is not supported.
127:             */
128:            public Date parse(String dateString) throws ParseException {
129:                for (int i = 0; i < _formats.length; i++) {
130:                    try {
131:                        return _formats[i].parse(dateString);
132:                    } catch (ParseException e) {
133:                        // do nothing
134:                    }
135:                }
136:                throw new ParseException("Unsupported date format: "
137:                        + dateString, -1);
138:            }
139:
140:            public String format(Date date) {
141:                return date == null ? null : _formats[0].format(date);
142:            }
143:        }
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