/*
* 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.types.selectors;
import java.io.File;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.text.ParseException;
import java.util.Locale;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.Parameter;
import org.apache.tools.ant.types.TimeComparison;
import org.apache.tools.ant.util.FileUtils;
/**
* Selector that chooses files based on their last modified date.
*
* @since 1.5
*/
public class DateSelector extends BaseExtendSelector {
/** Utilities used for file operations */
private static final FileUtils FILE_UTILS = FileUtils.getFileUtils();
private long millis = -1;
private String dateTime = null;
private boolean includeDirs = false;
private long granularity = 0;
private String pattern;
private TimeComparison when = TimeComparison.EQUAL;
/** Key to used for parameterized custom selector */
public static final String MILLIS_KEY = "millis";
/** Key to used for parameterized custom selector */
public static final String DATETIME_KEY = "datetime";
/** Key to used for parameterized custom selector */
public static final String CHECKDIRS_KEY = "checkdirs";
/** Key to used for parameterized custom selector */
public static final String GRANULARITY_KEY = "granularity";
/** Key to used for parameterized custom selector */
public static final String WHEN_KEY = "when";
/** Key to used for parameterized custom selector */
public static final String PATTERN_KEY = "pattern";
/**
* Creates a new <code>DateSelector</code> instance.
*
*/
public DateSelector() {
granularity = FILE_UTILS.getFileTimestampGranularity();
}
/**
* @return a string describing this object
*/
public String toString() {
StringBuffer buf = new StringBuffer("{dateselector date: ");
buf.append(dateTime);
buf.append(" compare: ").append(when.getValue());
buf.append(" granularity: ");
buf.append(granularity);
if (pattern != null) {
buf.append(" pattern: ").append(pattern);
}
buf.append("}");
return buf.toString();
}
/**
* Set the time; for users who prefer to express time in ms since 1970.
*
* @param millis the time to compare file's last modified date to,
* expressed in milliseconds.
*/
public void setMillis(long millis) {
this.millis = millis;
}
/**
* Returns the millisecond value the selector is set for.
* @return the millisecond value.
*/
public long getMillis() {
if (dateTime != null) {
validate();
}
return millis;
}
/**
* Sets the date. The user must supply it in MM/DD/YYYY HH:MM AM_PM format,
* unless an alternate pattern is specified via the pattern attribute.
*
* @param dateTime a formatted date <code>String</code>.
*/
public void setDatetime(String dateTime) {
this.dateTime = dateTime;
millis = -1;
}
/**
* Set whether to check dates on directories.
*
* @param includeDirs whether to check the timestamp on directories.
*/
public void setCheckdirs(boolean includeDirs) {
this.includeDirs = includeDirs;
}
/**
* Sets the number of milliseconds leeway we will give before we consider
* a file not to have matched a date.
* @param granularity the number of milliseconds leeway.
*/
public void setGranularity(int granularity) {
this.granularity = granularity;
}
/**
* Sets the type of comparison to be done on the file's last modified
* date.
*
* @param tcmp The comparison to perform, an EnumeratedAttribute.
*/
public void setWhen(TimeComparisons tcmp) {
setWhen((TimeComparison) tcmp);
}
/**
* Set the comparison type.
* @param t TimeComparison object.
*/
public void setWhen(TimeComparison t) {
when = t;
}
/**
* Sets the pattern to be used for the SimpleDateFormat.
*
* @param pattern the pattern that defines the date format.
*/
public void setPattern(String pattern) {
this.pattern = pattern;
}
/**
* When using this as a custom selector, this method will be called.
* It translates each parameter into the appropriate setXXX() call.
*
* @param parameters the complete set of parameters for this selector.
*/
public void setParameters(Parameter[] parameters) {
super.setParameters(parameters);
if (parameters != null) {
for (int i = 0; i < parameters.length; i++) {
String paramname = parameters[i].getName();
if (MILLIS_KEY.equalsIgnoreCase(paramname)) {
try {
setMillis(new Long(parameters[i].getValue()
).longValue());
} catch (NumberFormatException nfe) {
setError("Invalid millisecond setting "
+ parameters[i].getValue());
}
} else if (DATETIME_KEY.equalsIgnoreCase(paramname)) {
setDatetime(parameters[i].getValue());
} else if (CHECKDIRS_KEY.equalsIgnoreCase(paramname)) {
setCheckdirs(Project.toBoolean(parameters[i].getValue()));
} else if (GRANULARITY_KEY.equalsIgnoreCase(paramname)) {
try {
setGranularity(new Integer(parameters[i].getValue()
).intValue());
} catch (NumberFormatException nfe) {
setError("Invalid granularity setting "
+ parameters[i].getValue());
}
} else if (WHEN_KEY.equalsIgnoreCase(paramname)) {
setWhen(new TimeComparison(parameters[i].getValue()));
} else if (PATTERN_KEY.equalsIgnoreCase(paramname)) {
setPattern(parameters[i].getValue());
} else {
setError("Invalid parameter " + paramname);
}
}
}
}
/**
* This is a consistency check to ensure the selector's required
* values have been set.
*/
public void verifySettings() {
if (dateTime == null && millis < 0) {
setError("You must provide a datetime or the number of "
+ "milliseconds.");
} else if (millis < 0 && dateTime != null) {
// check millis and only set it once.
DateFormat df = ((pattern == null)
? DateFormat.getDateTimeInstance(
DateFormat.SHORT, DateFormat.SHORT, Locale.US)
: new SimpleDateFormat(pattern));
try {
setMillis(df.parse(dateTime).getTime());
if (millis < 0) {
setError("Date of " + dateTime
+ " results in negative milliseconds value"
+ " relative to epoch (January 1, 1970, 00:00:00 GMT).");
}
} catch (ParseException pe) {
setError("Date of " + dateTime
+ " Cannot be parsed correctly. It should be in"
+ ((pattern == null)
? " MM/DD/YYYY HH:MM AM_PM" : pattern) + " format.");
}
}
}
/**
* The heart of the matter. This is where the selector gets to decide
* on the inclusion of a file in a particular fileset.
*
* @param basedir the base directory from which the scan is being performed.
* @param filename is the name of the file to check.
* @param file is a java.io.File object the selector can use.
* @return whether the file is selected.
*/
public boolean isSelected(File basedir, String filename, File file) {
validate();
return (file.isDirectory() && !includeDirs)
|| when.evaluate(file.lastModified(), millis, granularity);
}
/**
* Enumerated attribute with the values for time comparison.
* <p>
*/
public static class TimeComparisons extends TimeComparison {
}
}
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