2 files changed, 143 insertions, 0 deletions
diff --git a/challenge-275/luca-ferrari/pljava/src/main/java/Task1.java b/challenge-275/luca-ferrari/pljava/src/main/java/Task1.java
new file mode 100644
index 0000000000..2e27bd455b
--- /dev/null
+++ b/challenge-275/luca-ferrari/pljava/src/main/java/Task1.java
@@ -0,0 +1,69 @@
+
+
+
+package PWC275;
+
+/**
+ * PL/Java implementation for PWC 275
+ * Task 1
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-275>
+ *
+ *
+ * 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/PWC275-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC275-1.jar', 'PWC275', true );
+ select sqlj.set_classpath( 'public', 'PWC275' );
+
+ select pwc275.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC275-1.jar', 'PWC275', 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.regex.*;
+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 = "pwc275",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final int task1_pljava( String sentence, String[] keys ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc275.task1_pljava" );
+
+	List<Pattern> patterns = Stream.of( keys )
+	    .map( letter -> { return Pattern.compile( String.format( "%s", letter ), Pattern.CASE_INSENSITIVE ); } )
+	    .collect( Collectors.toList() );
+
+	return (int) Stream.of( sentence.split( "\\s+" ) )
+	    .filter( word -> {
+		    for ( Pattern p : patterns )
+			if ( p.matcher( word ).find() )
+			    return false;
+
+		    return true;
+		} ).count();
+
+    }
+}
diff --git a/challenge-275/luca-ferrari/pljava/src/main/java/Task2.java b/challenge-275/luca-ferrari/pljava/src/main/java/Task2.java
new file mode 100644
index 0000000000..9778016704
--- /dev/null
+++ b/challenge-275/luca-ferrari/pljava/src/main/java/Task2.java
@@ -0,0 +1,74 @@
+
+
+
+package PWC275;
+
+/**
+ * PL/Java implementation for PWC 275
+ * Task 2
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-275>
+ *
+ *
+ * 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/PWC275-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC275-1.jar', 'PWC275', true );
+ select sqlj.set_classpath( 'public', 'PWC275' );
+
+ select pwc275.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC275-1.jar', 'PWC275', 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.regex.*;
+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 = "pwc275",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final String task2_pljava( String text ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc275.task2_pljava" );
+
+	Pattern digit = Pattern.compile( "\\d", Pattern.CASE_INSENSITIVE );
+	final String[] previous = new String[ 1 ];
+
+	return Stream.of( text.split( "" ) )
+	    .map( current -> {
+		    if ( digit.matcher( current ).find() ) {
+			// a digit
+
+		        current = String.format( "%c", ( (int) previous[ 0 ].charAt( 0 ) + Integer.parseInt( current ) ) );
+
+		    }
+		    else {
+			previous[ 0 ] = current;
+		    }
+
+		    return current;
+		} )
+	    .collect( Collectors.joining("") );
+    }
+}