1 files changed, 76 insertions, 0 deletions
diff --git a/challenge-333/luca-ferrari/pljava/src/main/java/Task2.java b/challenge-333/luca-ferrari/pljava/src/main/java/Task2.java
new file mode 100644
index 0000000000..06365ac6d0
--- /dev/null
+++ b/challenge-333/luca-ferrari/pljava/src/main/java/Task2.java
@@ -0,0 +1,76 @@
+
+
+
+package PWC333;
+
+/**
+ * PL/Java implementation for PWC 333
+ * Task 2
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-333>
+ *
+ *
+ * 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/PWC333-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC333-1.jar', 'PWC333', true );
+ select sqlj.set_classpath( 'public', 'PWC333' );
+
+ select pwc333.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC333-1.jar', 'PWC333', 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 Task2 {
+
+    private final static Logger logger = Logger.getAnonymousLogger();
+
+    @Function( schema = "pwc333",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final int[] task2_pljava( int[] numbers ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc333.task2_pljava" );
+
+	List<Integer> result = new LinkedList<Integer>();
+	int limit = numbers.length;
+
+	for ( int i = 0; i < numbers.length && limit > 0; i++ ) {
+	    result.add( numbers[ i ] );
+	    limit--;
+	    if ( limit == 0 )
+		break;
+
+	    if ( numbers[ i ] == 0 ) {
+		result.add( numbers[ i ] );
+		limit--;
+	    }
+	}
+
+	int[] tmp = new int[ result.size() ];
+	for ( int i = 0; i < tmp.length; i++ )
+	    tmp[ i ] = result.get( i );
+
+	return tmp;
+
+    }
+}