PWC 332

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 (but is task 2)
Task 2 PL/Java done (but is task 1)

Task 1 Python done
Task 2 Python done

1 files changed, 67 insertions, 0 deletions

diff --git a/challenge-332/luca-ferrari/pljava/src/main/java/Task1.java b/challenge-332/luca-ferrari/pljava/src/main/java/Task1.java
new file mode 100644
index 0000000000..9e314b2131
--- /dev/null
+++ b/challenge-332/luca-ferrari/pljava/src/main/java/Task1.java
@@ -0,0 +1,67 @@
+
+
+
+package PWC332;
+
+/**
+ * PL/Java implementation for PWC 332
+ * Task 1
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-332>
+ *
+ *
+ * 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/PWC332-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC332-1.jar', 'PWC332', true );
+ select sqlj.set_classpath( 'public', 'PWC332' );
+
+ select pwc332.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC332-1.jar', 'PWC332', 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 = "pwc332",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final boolean task1_pljava( String text ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc332.task1_pljava" );
+
+	Map<String, Integer> bag = new HashMap<String, Integer>();
+	boolean ok = true;
+
+	for ( String c : text.split( "" ) ) {
+	    bag.putIfAbsent( c, 0 );
+	    bag.put( c, bag.get( c ) + 1 );
+	    if ( bag.get( c ) > 1 )
+		ok = false;
+	}
+
+	return ok;
+
+    }
+}