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package PWC259;
/**
* PL/Java implementation for PWC 259
* Task 1
* See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-259>
*
*
* 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/PWC259-1.jar luca@rachel:/tmp
* To install into PostgreSQL execute:
select sqlj.install_jar( 'file:///tmp/PWC259-1.jar', 'PWC259', true );
select pwc259.task2_pljava();
and then to redeploy:
select sqlj.replace_jar( 'file:///tmp/PWC259-1.jar', 'PWC259', 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;
public class Task1 {
private final static Logger logger = Logger.getAnonymousLogger();
@Function( schema = "pwc259",
onNullInput = RETURNS_NULL,
effects = IMMUTABLE )
public static final java.sql.Date task1_pljava( Date startDay, int how_many, Date[] holidays ) throws SQLException {
logger.log( Level.INFO, "Entering pwc259.task1_pljava" );
Calendar day = Calendar.getInstance();
day.setTime( startDay );
while ( how_many > 0 ) {
day.add( Calendar.DAY_OF_YEAR, 1 );
while ( day.get( Calendar.DAY_OF_MONTH ) == Calendar.SUNDAY
|| day.get( Calendar.DAY_OF_MONTH ) == Calendar.SATURDAY )
day.add( Calendar.DAY_OF_YEAR, 1 );
if ( holidays != null )
for ( Date skip : holidays )
if ( skip.equals( day.getTime() ) )
day.add( Calendar.DAY_OF_YEAR, 1 );
how_many--;
}
return new java.sql.Date( day.getTimeInMillis() );
}
}
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