From 75d44d3da62d2181f3f96d43f3942cfb244ab52a Mon Sep 17 00:00:00 2001 From: Luca Ferrari Date: Thu, 31 Jul 2025 10:20:48 +0200 Subject: 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 --- .../luca-ferrari/pljava/src/main/java/Task1.java | 67 ++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 challenge-332/luca-ferrari/pljava/src/main/java/Task1.java (limited to 'challenge-332/luca-ferrari/pljava/src/main/java/Task1.java') 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 + * + * + * 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 bag = new HashMap(); + 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; + + } +} -- cgit