PWC 326

Task 1 and 2 in Raku done
Task 1 and 2 in PL/Perl done
Task 1 and 2 done in PL/PgSQL
Task 1 and 2 done in PL/Java
Task 1 and 2 done in Python

2 files changed, 134 insertions, 0 deletions

diff --git a/challenge-326/luca-ferrari/pljava/src/main/java/Task1.java b/challenge-326/luca-ferrari/pljava/src/main/java/Task1.java
new file mode 100644
index 0000000000..c24f26ad2d
--- /dev/null
+++ b/challenge-326/luca-ferrari/pljava/src/main/java/Task1.java
@@ -0,0 +1,62 @@
+
+
+
+package PWC326;
+
+/**
+ * PL/Java implementation for PWC 326
+ * Task 1
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-326>
+ *
+ *
+ * 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/PWC326-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC326-1.jar', 'PWC326', true );
+ select sqlj.set_classpath( 'public', 'PWC326' );
+
+ select pwc326.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC326-1.jar', 'PWC326', 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;
+import java.time.*;
+import java.time.temporal.*;
+
+public class Task1 {
+
+    private final static Logger logger = Logger.getAnonymousLogger();
+
+    @Function( schema = "pwc326",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final int task1_pljava( Date day ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc326.task1_pljava" );
+
+	Calendar end   = Calendar.getInstance();
+	end.setTime( day );
+	Calendar begin = (Calendar) end.clone();
+	begin.set( Calendar.DAY_OF_YEAR, 1 );
+	return (int) ( ( end.getTimeInMillis() - begin.getTimeInMillis() ) / ( 1000 * 60 * 60 * 24 ) );
+    }
+}
diff --git a/challenge-326/luca-ferrari/pljava/src/main/java/Task2.java b/challenge-326/luca-ferrari/pljava/src/main/java/Task2.java
new file mode 100644
index 0000000000..820bff4301
--- /dev/null
+++ b/challenge-326/luca-ferrari/pljava/src/main/java/Task2.java
@@ -0,0 +1,72 @@
+
+
+
+package PWC326;
+
+/**
+ * PL/Java implementation for PWC 326
+ * Task 2
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-326>
+ *
+ *
+ * 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/PWC326-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC326-1.jar', 'PWC326', true );
+ select sqlj.set_classpath( 'public', 'PWC326' );
+
+ select pwc326.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC326-1.jar', 'PWC326', 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 = "pwc326",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final int[] task2_pljava( int[] nums ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc326.task2_pljava" );
+
+	List<Integer> result = new LinkedList<Integer>();
+	for( int i = 0; i < nums.length - 1; i++ ) {
+	    if( i % 2 != 0 )
+		continue;
+
+	    int base  = nums[ i ];
+	    int times = nums[ i + 1 ];
+
+	    for ( int j = 0; j < times; j++ )
+		result.add( base );
+	}
+
+	int r[] = new int[ result.size() ];
+	for ( int i = 0; i < result.size(); i++ )
+	    r[ i ] = result.get( i );
+
+	return r;
+    }
+}