Merge branch 'master' of https://github.com/manwar/perlweeklychallenge-club

1 files changed, 73 insertions, 0 deletions

diff --git a/challenge-259/luca-ferrari/pljava/src/main/java/Task1.java b/challenge-259/luca-ferrari/pljava/src/main/java/Task1.java
new file mode 100644
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+++ b/challenge-259/luca-ferrari/pljava/src/main/java/Task1.java
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+
+
+
+package PWC259;
+
+/**
+ * PL/Java implementation for PWC 259
+ * Task 1
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-259>
+ *
+ *
+ * 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/PWC259-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC259-1.jar', 'PWC259', true );
+
+ select pwc259.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC259-1.jar', 'PWC259', 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 = "pwc259",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final java.sql.Date task1_pljava( Date startDay, int how_many, Date[] holidays ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc259.task1_pljava" );
+
+	Calendar day = Calendar.getInstance();
+	day.setTime( startDay );
+
+	while ( how_many > 0 ) {
+	    day.add( Calendar.DAY_OF_YEAR, 1 );
+
+	    while ( day.get( Calendar.DAY_OF_MONTH ) == Calendar.SUNDAY
+		    || day.get( Calendar.DAY_OF_MONTH ) == Calendar.SATURDAY )
+		day.add( Calendar.DAY_OF_YEAR, 1 );
+
+	    if ( holidays != null )
+		for ( Date skip : holidays )
+		    if ( skip.equals( day.getTime() ) )
+			day.add( Calendar.DAY_OF_YEAR, 1 );
+
+	    how_many--;
+	}
+
+	return new java.sql.Date( day.getTimeInMillis() );
+    }
+}