From 0cc3d19f45790123a25f7f33d9c5b3b239a48c5f Mon Sep 17 00:00:00 2001 From: Luca Ferrari Date: Wed, 14 Feb 2024 11:29:06 +0100 Subject: PWC 256 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 PL/Java done Task 2 PL/Java done --- .../luca-ferrari/pljava/src/main/java/Task1.java | 70 ++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 challenge-256/luca-ferrari/pljava/src/main/java/Task1.java (limited to 'challenge-256/luca-ferrari/pljava/src/main/java/Task1.java') diff --git a/challenge-256/luca-ferrari/pljava/src/main/java/Task1.java b/challenge-256/luca-ferrari/pljava/src/main/java/Task1.java new file mode 100644 index 0000000000..f532901d6e --- /dev/null +++ b/challenge-256/luca-ferrari/pljava/src/main/java/Task1.java @@ -0,0 +1,70 @@ +package PWC256; + +/** + * PL/Java implementation for PWC 256 + * 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/PWC256.jar luca@venkman:/tmp + + + * To install into PostgreSQL execute: + + select sqlj.install_jar( 'file:///tmp/PWC256.jar', 'PWC256', true ); + + select 256.task1_pljava(); + + and then to redeploy: + + select sqlj.replace_jar( 'file:///tmp/PWC256.jar', 'PWC256', 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.*; + +public class Task1 { + + private final static Logger logger = Logger.getAnonymousLogger(); + + @Function( schema = "256", + onNullInput = RETURNS_NULL, + effects = IMMUTABLE ) + public static final int task1_pljava( String[] words ) throws SQLException { + logger.log( Level.INFO, "Entering task1_pljava" ); + + int max = 0; + for ( String current : words ) { + int count = count( current, words ); + if ( count > max ) + max = count; + } + + return max; + + } + + private static final int count( String word, String[] words ) { + int count = 0; + StringBuilder builder = new StringBuilder(); + builder.append( word ); + word = builder.reverse().toString(); + + for ( String w : words ) + if ( w.equals( word ) ) + count++; + + return count; + } +} -- cgit