PWC 262

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, 66 insertions, 0 deletions

diff --git a/challenge-262/luca-ferrari/pljava/src/main/java/Task1.java b/challenge-262/luca-ferrari/pljava/src/main/java/Task1.java
new file mode 100644
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+
+
+
+package PWC262;
+
+/**
+ * PL/Java implementation for PWC 262
+ * Task 1
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-262>
+ *
+ *
+ * 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/PWC262-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC262-1.jar', 'PWC262', true );
+ select sqlj.set_classpath( 'public', 'PWC262' );
+
+ select pwc262.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC262-1.jar', 'PWC262', 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 = "pwc262",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final int task1_pljava( int[] nums ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc262.task1_pljava" );
+
+	int positives = 0;
+	int negatives = 0;
+
+	for ( int current : nums )
+	    if ( current >= 0 )
+		positives++;
+	    else
+		negatives++;
+
+	return positives >= negatives ? positives : negatives;
+
+    }
+}