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package PWC329;
/**
* PL/Java implementation for PWC 329
* Task 1
* See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-329>
*
*
* 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/PWC329-1.jar luca@rachel:/tmp
* To install into PostgreSQL execute:
select sqlj.install_jar( 'file:///tmp/PWC329-1.jar', 'PWC329', true );
select sqlj.set_classpath( 'public', 'PWC329' );
select pwc329.task2_pljava();
and then to redeploy:
select sqlj.replace_jar( 'file:///tmp/PWC329-1.jar', 'PWC329', 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.util.regex.*;
public class Task1 {
private final static Logger logger = Logger.getAnonymousLogger();
@Function( schema = "pwc329",
onNullInput = RETURNS_NULL,
effects = IMMUTABLE )
public static final int[] task1_pljava( String string ) throws SQLException {
logger.log( Level.INFO, "Entering pwc329.task1_pljava" );
Map<Integer, Integer> numbers = new HashMap<Integer, Integer>();
Pattern regexp = Pattern.compile( "\\d+" );
Matcher engine = regexp.matcher( string );
while ( engine.find() ) {
try {
numbers.put( Integer.parseInt( engine.group() ), 1 );
} catch( Exception e ) { }
}
int result[] = new int[ numbers.size() ];
int j = 0;
for ( int i : numbers.keySet() )
result[ j++ ] = i;
return result;
}
}
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