Custom Condition in ANT

Here is an example of custom ant task.

The custom condition validates the current execution time with the time interval specified.


package com.package.ant.customTask;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.taskdefs.condition.Condition;
import org.joda.time.DateTime;
import org.joda.time.MutableDateTime;

/**
* This class checks whether the current time lies between the specified time
* range.
*
* @author Srikanth NT
*
*/
public class BetweenTimeRangeCondition implements Condition {
private String startTimePeriod = "00:01";
private String endTimePeriod = "06:30";

/**
* @see org.apache.tools.ant.Task#execute()
*/
public boolean eval() throws BuildException {
DateTime startsAt = getValidTime(startTimePeriod);
DateTime endsAt = getValidTime(endTimePeriod);

if (startsAt.isAfter(endsAt)) {
throw new BuildException("Start time period cannot be greater than End time period.");
}

return (startsAt.isBeforeNow() && endsAt.isAfterNow());
}

/**
* Validates the given time.
* @param timePeriod
* @return
* @throws BuildException
*/
private DateTime getValidTime(String timePeriod) throws BuildException {
MutableDateTime testCalendar = new MutableDateTime();
if (timePeriod.indexOf(':') != 2 && timePeriod.lastIndexOf(':') != 2) {
throw new BuildException("Time period '" + timePeriod + "' should be in the format 'hh:mm' (24 Hour).");
}

try {
testCalendar.setHourOfDay(Integer.parseInt(timePeriod.split(":")[0]));
testCalendar.setMinuteOfHour(Integer.parseInt(timePeriod.split(":")[1]));
testCalendar.setSecondOfMinute(0);
} catch (Exception e) {
throw new BuildException("Time period '" + timePeriod + "' should be in the format 'hh:mm' (24 Hour).");
}
return testCalendar.toDateTime();
}

/**
* @param startTimePeriod
*/
public void setStartTimePeriod(String startTimePeriod) {
this.startTimePeriod = startTimePeriod;
}

/**
* @param endTimePeriod
*/
public void setEndTimePeriod(String endTimePeriod) {
this.endTimePeriod = endTimePeriod;
}

}

And in the build.xml include the following lines.

<typedef name="betweentime" classname="com.package.ant.customTask.BetweenTimeRangeCondition" classpath="BetweenTimeRangeCondition.class" />

<fail message="Failing the build.">
<condition>
<not>
<betweentime startTimePeriod="00:01" endTimePeriod="06:30" />
</not>
</condition>
</fail>