PWC 278

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

2 files changed, 144 insertions, 0 deletions

diff --git a/challenge-278/luca-ferrari/pljava/src/main/java/Task1.java b/challenge-278/luca-ferrari/pljava/src/main/java/Task1.java
new file mode 100644
index 0000000000..b56caa6e51
--- /dev/null
+++ b/challenge-278/luca-ferrari/pljava/src/main/java/Task1.java
@@ -0,0 +1,70 @@
+
+
+
+package PWC278;
+
+/**
+ * PL/Java implementation for PWC 278
+ * Task 1
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-278>
+ *
+ *
+ * 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/PWC278-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC278-1.jar', 'PWC278', true );
+ select sqlj.set_classpath( 'public', 'PWC278' );
+
+ select pwc278.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC278-1.jar', 'PWC278', 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 = "pwc278",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final String task1_pljava( String[] words ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc278.task1_pljava" );
+
+	final Map<Integer, String> sorted = new HashMap<Integer, String>();
+	Stream.of( words ).forEach( word -> {
+		Pattern pattern  = Pattern.compile( "^([a-zA-Z]+)(\\d+)+$" );
+		Matcher m = pattern.matcher( word );
+		if ( m.matches() ) {
+		    sorted.put( Integer.parseInt( m.group( 2 ) ),
+				m.group( 1 ) );
+		}
+	    } );
+
+	return sorted.entrySet().stream()
+	    .sorted( Comparator.comparing( Map.Entry::getKey ) )
+	    .map( Map.Entry::getValue )
+	    .collect( Collectors.joining( " " ) );
+    }
+}
diff --git a/challenge-278/luca-ferrari/pljava/src/main/java/Task2.java b/challenge-278/luca-ferrari/pljava/src/main/java/Task2.java
new file mode 100644
index 0000000000..ad79c4417f
--- /dev/null
+++ b/challenge-278/luca-ferrari/pljava/src/main/java/Task2.java
@@ -0,0 +1,74 @@
+
+
+
+package PWC278;
+
+/**
+ * PL/Java implementation for PWC 278
+ * Task 2
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-278>
+ *
+ *
+ * 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/PWC278-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC278-1.jar', 'PWC278', true );
+ select sqlj.set_classpath( 'public', 'PWC278' );
+
+ select pwc278.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC278-1.jar', 'PWC278', 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 Task2 {
+
+    private final static Logger logger = Logger.getAnonymousLogger();
+
+    @Function( schema = "pwc278",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final String task2_pljava( String word, String c ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc278.task2_pljava" );
+
+	if ( ! word.contains( c ) )
+	    return word;
+
+	final List<String> left = new LinkedList<String>();
+	final List<String> right = new LinkedList<String>();
+	final boolean[] found = { false };
+	Stream.of( word.split( "" ) ).forEach( letter -> {
+		if ( found[ 0 ] )
+		    right.add( letter );
+		else {
+		    left.add( letter );
+
+		    if ( letter.equals( c ) )
+			found[ 0 ] = true;
+		}
+	    } );
+
+	Collections.sort( left );
+	return left.stream().collect( Collectors.joining() ) + right.stream().collect( Collectors.joining() );
+    }
+}