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package PWC326;
/**
* PL/Java implementation for PWC 326
* Task 1
* See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-326>
*
*
* To compile on the local machine:
$ export JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64/ # if not already set
$ mvn clean build
$ scp target/PWC326-1.jar luca@rachel:/tmp
* To install into PostgreSQL execute:
select sqlj.install_jar( 'file:///tmp/PWC326-1.jar', 'PWC326', true );
select sqlj.set_classpath( 'public', 'PWC326' );
select pwc326.task2_pljava();
and then to redeploy:
select sqlj.replace_jar( 'file:///tmp/PWC326-1.jar', 'PWC326', true );
*/
import org.postgresql.pljava.*;
import org.postgresql.pljava.annotation.Function;
import static org.postgresql.pljava.annotation.Function.Effects.IMMUTABLE;
import static org.postgresql.pljava.annotation.Function.OnNullInput.RETURNS_NULL;
import java.util.*;
import java.util.stream.*;
import java.sql.SQLException;
import java.util.logging.*;
import java.sql.ResultSet;
import java.sql.Date;
import java.time.*;
import java.time.temporal.*;
public class Task1 {
private final static Logger logger = Logger.getAnonymousLogger();
@Function( schema = "pwc326",
onNullInput = RETURNS_NULL,
effects = IMMUTABLE )
public static final int task1_pljava( Date day ) throws SQLException {
logger.log( Level.INFO, "Entering pwc326.task1_pljava" );
Calendar end = Calendar.getInstance();
end.setTime( day );
Calendar begin = (Calendar) end.clone();
begin.set( Calendar.DAY_OF_YEAR, 1 );
return (int) ( ( end.getTimeInMillis() - begin.getTimeInMillis() ) / ( 1000 * 60 * 60 * 24 ) );
}
}
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