PWC 329

Task 1 Raku done
Task 2 Raku done

Task 1 PL/Perl done
Task 2 PL/Perl done

Task 1 PL/PgSQL done
Task 2 PL/PgSQL done

Task 1 PL/Java done
Task 2 PL/Java done

Task 1 Python done
Task 2 Python done

1 files changed, 77 insertions, 0 deletions

diff --git a/challenge-329/luca-ferrari/pljava/src/main/java/Task2.java b/challenge-329/luca-ferrari/pljava/src/main/java/Task2.java
new file mode 100644
index 0000000000..64956c8ab5
--- /dev/null
+++ b/challenge-329/luca-ferrari/pljava/src/main/java/Task2.java
@@ -0,0 +1,77 @@
+
+
+
+package PWC329;
+
+/**
+ * PL/Java implementation for PWC 329
+ * Task 2
+ * 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 Task2 {
+
+    private final static Logger logger = Logger.getAnonymousLogger();
+
+    @Function( schema = "pwc329",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final String task2_pljava( String string ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc329.task2_pljava" );
+
+
+	char chars[] = string.toCharArray();
+
+	int begin = 0;
+	int end   = 0;
+
+	for ( int i = 0; i < chars.length; i++ ) {
+	    char c = chars[ i ];
+	    char n = Character.toUpperCase( c );
+	    if ( Character.isUpperCase( c ) )
+		n = Character.toLowerCase( c );
+
+	    for ( int j = i + 1; j < chars.length; j++ )
+		if ( chars[ j ] == n )
+		    if ( ( end - begin ) < ( j - i ) ) {
+			begin = i;
+			end   = j;
+		    }
+	}
+
+	return string.substring( begin, end + 1 );
+    }
+}