From 92d7474a6754e622fe4f2091f8e25c52ac239e52 Mon Sep 17 00:00:00 2001
From: Luca Ferrari <fluca1978@gmail.com>
Date: Mon, 30 Sep 2024 10:03:36 +0200
Subject: PWC 289

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
---
 .../luca-ferrari/pljava/src/main/java/Task1.java   | 64 ++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 challenge-289/luca-ferrari/pljava/src/main/java/Task1.java

(limited to 'challenge-289/luca-ferrari/pljava/src/main/java/Task1.java')

diff --git a/challenge-289/luca-ferrari/pljava/src/main/java/Task1.java b/challenge-289/luca-ferrari/pljava/src/main/java/Task1.java
new file mode 100644
index 0000000000..9666996c9a
--- /dev/null
+++ b/challenge-289/luca-ferrari/pljava/src/main/java/Task1.java
@@ -0,0 +1,64 @@
+
+
+
+package PWC289;
+
+/**
+ * PL/Java implementation for PWC 289
+ * Task 1
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-289>
+ *
+ *
+ * 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/PWC289-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC289-1.jar', 'PWC289', true );
+ select sqlj.set_classpath( 'public', 'PWC289' );
+
+ select pwc289.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC289-1.jar', 'PWC289', 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 = "pwc289",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final int task1_pljava( int[] nums ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc289.task1_pljava" );
+
+	List<Integer> sorted = IntStream.of( nums ).boxed().sorted( Collections.reverseOrder() )
+	    .collect( Collectors.toList() );
+
+
+	if ( sorted.size() >= 3 )
+	    return sorted.get( 3 );
+	else
+	    return sorted.get( 0 );
+
+    }
+}
-- 
cgit