From 093553020c7cf39461a2be0e1c8851c983ba863b Mon Sep 17 00:00:00 2001 From: Luca Ferrari Date: Mon, 26 Feb 2024 09:28:02 +0100 Subject: PWC 258 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 Python done Task 2 Python done Task 1 Java done Task 2 Java done --- .../luca-ferrari/pljava/src/main/java/Task1.java | 62 ++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 challenge-258/luca-ferrari/pljava/src/main/java/Task1.java (limited to 'challenge-258/luca-ferrari/pljava/src/main/java/Task1.java') diff --git a/challenge-258/luca-ferrari/pljava/src/main/java/Task1.java b/challenge-258/luca-ferrari/pljava/src/main/java/Task1.java new file mode 100644 index 0000000000..52e1cf3491 --- /dev/null +++ b/challenge-258/luca-ferrari/pljava/src/main/java/Task1.java @@ -0,0 +1,62 @@ +package PWC258; + +/** + * PL/Java implementation for PWC 258 + * Task 1 + * See + * + * + * 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/PWC258.jar luca@rachel:/tmp + + + * To install into PostgreSQL execute: + + select sqlj.install_jar( 'file:///tmp/PWC258-1.jar', 'PWC258', true ); + + select pwc258.task1_pljava(); + + and then to redeploy: + + select sqlj.replace_jar( 'file:///tmp/PWC258-1.jar', 'PWC258', 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.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 = "pwc258", + onNullInput = RETURNS_NULL, + effects = IMMUTABLE ) + public static final int task1_pljava( int nums[] ) throws SQLException { + logger.log( Level.INFO, "Entering task1_pljava" ); + + List numbers = new LinkedList(); + for ( int current : nums ) + numbers.add( current ); + + int count = numbers.stream().mapToInt( current -> { + if ( String.format( "%d", current ).length() % 2 == 0 ) + return 1; + else + return 0; + } ).sum(); + + return count; + } +} -- cgit