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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.tools.ant.taskdefs;
import java.text.SimpleDateFormat;
import java.time.Instant;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Optional;
import java.util.StringTokenizer;
import java.util.TimeZone;
import java.util.Vector;
import java.util.function.BiFunction;
import java.util.function.Function;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Location;
import org.apache.tools.ant.MagicNames;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.types.EnumeratedAttribute;
/**
* Sets properties to the current time, or offsets from the current time.
* The default properties are TSTAMP, DSTAMP and TODAY;
*
* @since Ant 1.1
* @ant.task category="utility"
*/
public class Tstamp extends Task {
private List customFormats = new Vector<>();
private String prefix = "";
/**
* Set a prefix for the properties. If the prefix does not end with a "."
* one is automatically added.
* @param prefix the prefix to use.
* @since Ant 1.5
*/
public void setPrefix(String prefix) {
this.prefix = prefix;
if (!this.prefix.endsWith(".")) {
this.prefix += ".";
}
}
/**
* create the timestamps. Custom ones are done before
* the standard ones, to get their retaliation in early.
* @throws BuildException on error.
*/
@Override
public void execute() throws BuildException {
try {
Date d = getNow();
customFormats.forEach(cts -> cts.execute(getProject(), d, getLocation()));
SimpleDateFormat dstamp = new SimpleDateFormat("yyyyMMdd");
setProperty("DSTAMP", dstamp.format(d));
SimpleDateFormat tstamp = new SimpleDateFormat("HHmm");
setProperty("TSTAMP", tstamp.format(d));
SimpleDateFormat today
= new SimpleDateFormat("MMMM d yyyy", Locale.US);
setProperty("TODAY", today.format(d));
} catch (Exception e) {
throw new BuildException(e);
}
}
/**
* create a custom format with the current prefix.
* @return a ready to fill-in format
*/
public CustomFormat createFormat() {
CustomFormat cts = new CustomFormat();
customFormats.add(cts);
return cts;
}
/**
* helper that encapsulates prefix logic and property setting
* policy (i.e. we use setNewProperty instead of setProperty).
*/
private void setProperty(String name, String value) {
getProject().setNewProperty(prefix + name, value);
}
/**
* Return the {@link Date} instance to use as base for DSTAMP, TSTAMP and TODAY.
*
* @return Date
*/
protected Date getNow() {
Optional now = getNow(
MagicNames.TSTAMP_NOW_ISO,
s -> Date.from(Instant.parse(s)),
(k, v) -> "magic property " + k + " ignored as '" + v + "' is not in valid ISO pattern"
);
if (now.isPresent()) {
return now.get();
}
now = getNow(
MagicNames.TSTAMP_NOW,
s -> new Date(1000 * Long.parseLong(s)),
(k, v) -> "magic property " + k + " ignored as " + v + " is not a valid number"
);
return now.orElseGet(Date::new);
}
/**
* Checks and returns a Date if the specified property is set.
* @param propertyName name of the property to check
* @param map conversion of the property value as string to Date
* @param log supplier of the log message containing the property name and value if
* the conversion fails
* @return Optional containing the Date or null
*/
protected Optional getNow(String propertyName, Function map, BiFunction log) {
String property = getProject().getProperty(propertyName);
if (property != null && !property.isEmpty()) {
try {
return Optional.ofNullable(map.apply(property));
} catch (Exception e) {
log(log.apply(propertyName, property));
}
}
return Optional.empty();
}
/**
* This nested element that allows a property to be set
* to the current date and time in a given format.
* The date/time patterns are as defined in the
* Java SimpleDateFormat class.
* The format element also allows offsets to be applied to
* the time to generate different time values.
* @todo consider refactoring out into a re-usable element.
*/
public class CustomFormat {
private TimeZone timeZone;
private String propertyName;
private String pattern;
private String language;
private String country;
private String variant;
private int offset = 0;
private int field = Calendar.DATE;
/**
* The property to receive the date/time string in the given pattern
* @param propertyName the name of the property.
*/
public void setProperty(String propertyName) {
this.propertyName = propertyName;
}
/**
* The date/time pattern to be used. The values are as
* defined by the Java SimpleDateFormat class.
* @param pattern the pattern to use.
* @see java.text.SimpleDateFormat
*/
public void setPattern(String pattern) {
this.pattern = pattern;
}
/**
* The locale used to create date/time string.
* The general form is "language, country, variant" but
* either variant or variant and country may be omitted.
* For more information please refer to documentation
* for the java.util.Locale class.
* @param locale the locale to use.
* @see java.util.Locale
*/
public void setLocale(String locale) {
StringTokenizer st = new StringTokenizer(locale, " \t\n\r\f,");
try {
language = st.nextToken();
if (st.hasMoreElements()) {
country = st.nextToken();
if (st.hasMoreElements()) {
variant = st.nextToken();
if (st.hasMoreElements()) {
throw new BuildException("bad locale format", getLocation());
}
}
} else {
country = "";
}
} catch (NoSuchElementException e) {
throw new BuildException("bad locale format", e, getLocation());
}
}
/**
* The timezone to use for displaying time.
* The values are as defined by the Java TimeZone class.
* @param id the timezone value.
* @see java.util.TimeZone
*/
public void setTimezone(String id) {
timeZone = TimeZone.getTimeZone(id);
}
/**
* The numeric offset to the current time.
* @param offset the offset to use.
*/
public void setOffset(int offset) {
this.offset = offset;
}
/**
* Set the unit type (using String).
* @param unit the unit to use.
* @deprecated since 1.5.x.
* setUnit(String) is deprecated and is replaced with
* setUnit(Tstamp.Unit) to make Ant's
* Introspection mechanism do the work and also to
* encapsulate operations on the unit in its own
* class.
*/
@Deprecated
public void setUnit(String unit) {
log("DEPRECATED - The setUnit(String) method has been deprecated. Use setUnit(Tstamp.Unit) instead.");
Unit u = new Unit();
u.setValue(unit);
field = u.getCalendarField();
}
/**
* The unit of the offset to be applied to the current time.
* Valid Values are
*
*
millisecond
*
second
*
minute
*
hour
*
day
*
week
*
month
*
year
*
* The default unit is day.
* @param unit the unit to use.
*/
public void setUnit(Unit unit) {
field = unit.getCalendarField();
}
/**
* validate parameter and execute the format.
* @param project project to set property in.
* @param date date to use as a starting point.
* @param location line in file (for errors)
*/
public void execute(Project project, Date date, Location location) {
if (propertyName == null) {
throw new BuildException("property attribute must be provided", location);
}
if (pattern == null) {
throw new BuildException("pattern attribute must be provided", location);
}
SimpleDateFormat sdf;
if (language == null) {
sdf = new SimpleDateFormat(pattern);
} else if (variant == null) {
sdf = new SimpleDateFormat(pattern, new Locale(language, country));
} else {
sdf = new SimpleDateFormat(pattern, new Locale(language, country, variant));
}
if (offset != 0) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(field, offset);
date = calendar.getTime();
}
if (timeZone != null) {
sdf.setTimeZone(timeZone);
}
Tstamp.this.setProperty(propertyName, sdf.format(date));
}
}
/**
* set of valid units to use for time offsets.
*/
public static class Unit extends EnumeratedAttribute {
private static final String MILLISECOND = "millisecond";
private static final String SECOND = "second";
private static final String MINUTE = "minute";
private static final String HOUR = "hour";
private static final String DAY = "day";
private static final String WEEK = "week";
private static final String MONTH = "month";
private static final String YEAR = "year";
private static final String[] UNITS = {
MILLISECOND,
SECOND,
MINUTE,
HOUR,
DAY,
WEEK,
MONTH,
YEAR
};
private Map calendarFields = new HashMap<>();
/** Constructor for Unit enumerated type. */
public Unit() {
calendarFields.put(MILLISECOND,
Calendar.MILLISECOND);
calendarFields.put(SECOND, Calendar.SECOND);
calendarFields.put(MINUTE, Calendar.MINUTE);
calendarFields.put(HOUR, Calendar.HOUR_OF_DAY);
calendarFields.put(DAY, Calendar.DATE);
calendarFields.put(WEEK, Calendar.WEEK_OF_YEAR);
calendarFields.put(MONTH, Calendar.MONTH);
calendarFields.put(YEAR, Calendar.YEAR);
}
/**
* Convert the value to int unit value.
* @return an int value.
*/
public int getCalendarField() {
String key = getValue().toLowerCase(Locale.ENGLISH);
return calendarFields.get(key);
}
/**
* Get the valid values.
* @return the value values.
*/
@Override
public String[] getValues() {
return UNITS;
}
}
}
