blob: 9de6bbcdacb1c5cd72f14ea9f6166f8499cfdada (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
package PWC330;
/**
* PL/Java implementation for PWC 330
* Task 1
* See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-330>
*
*
* 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/PWC330-1.jar luca@rachel:/tmp
* To install into PostgreSQL execute:
select sqlj.install_jar( 'file:///tmp/PWC330-1.jar', 'PWC330', true );
select sqlj.set_classpath( 'public', 'PWC330' );
select pwc330.task2_pljava();
and then to redeploy:
select sqlj.replace_jar( 'file:///tmp/PWC330-1.jar', 'PWC330', 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 = "pwc330",
onNullInput = RETURNS_NULL,
effects = IMMUTABLE )
public static final String task1_pljava( String string ) throws SQLException {
logger.log( Level.INFO, "Entering pwc330.task1_pljava" );
Pattern regexp = Pattern.compile( "([a-z])([0-9])" );
Matcher engine = regexp.matcher( string );
while ( engine.find() ) {
string = string.replaceAll( engine.group( 1 ) + engine.group( 2 ), "" );
engine = regexp.matcher( string );
}
return string;
}
}
|
