Merge pull request #12404 from fluca1978/PWC331

PWC 331

2 files changed, 134 insertions, 0 deletions

diff --git a/challenge-331/luca-ferrari/pljava/src/main/java/Task1.java b/challenge-331/luca-ferrari/pljava/src/main/java/Task1.java
new file mode 100644
index 0000000000..d10194368f
--- /dev/null
+++ b/challenge-331/luca-ferrari/pljava/src/main/java/Task1.java
@@ -0,0 +1,66 @@
+
+
+
+package PWC331;
+
+/**
+ * PL/Java implementation for PWC 331
+ * Task 1
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-331>
+ *
+ *
+ * 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/PWC331-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC331-1.jar', 'PWC331', true );
+ select sqlj.set_classpath( 'public', 'PWC331' );
+
+ select pwc331.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC331-1.jar', 'PWC331', 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 = "pwc331",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static int task1_pljava( String sentence ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc331.task1_pljava" );
+
+	int length = 0;
+
+	for ( String s : sentence.split( "\\s+" ) ) {
+	    s = s.trim();
+	    if ( s.length() == 0 )
+		continue;
+
+	    length = s.length();
+	}
+
+	return length;
+    }
+}
diff --git a/challenge-331/luca-ferrari/pljava/src/main/java/Task2.java b/challenge-331/luca-ferrari/pljava/src/main/java/Task2.java
new file mode 100644
index 0000000000..1b4a01182a
--- /dev/null
+++ b/challenge-331/luca-ferrari/pljava/src/main/java/Task2.java
@@ -0,0 +1,68 @@
+
+
+
+package PWC331;
+
+/**
+ * PL/Java implementation for PWC 331
+ * Task 2
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-331>
+ *
+ *
+ * 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/PWC331-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC331-1.jar', 'PWC331', true );
+ select sqlj.set_classpath( 'public', 'PWC331' );
+
+ select pwc331.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC331-1.jar', 'PWC331', 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 = "pwc331",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final boolean task2_pljava( String left, String right ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc331.task2_pljava" );
+
+	if ( left.length() != right.length() )
+	    return false;
+
+	left = left.toLowerCase();
+	right = right.toLowerCase();
+	int diff = 0;
+
+	for ( int i = 0; i < left.length(); i++ ) {
+	    if ( left.charAt( i ) != right.charAt( i ) )
+		diff++;
+	}
+
+	return diff <= 2;
+    }
+}