Merge pull request #10244 from fluca1978/PWC273

PWC 273

1 files changed, 60 insertions, 0 deletions

diff --git a/challenge-273/luca-ferrari/pljava/src/main/java/Task2.java b/challenge-273/luca-ferrari/pljava/src/main/java/Task2.java
new file mode 100644
index 0000000000..91e2f8078b
--- /dev/null
+++ b/challenge-273/luca-ferrari/pljava/src/main/java/Task2.java
@@ -0,0 +1,60 @@
+
+
+
+package PWC273;
+
+/**
+ * PL/Java implementation for PWC 273
+ * Task 2
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-273>
+ *
+ *
+ * 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/PWC273-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC273-1.jar', 'PWC273', true );
+ select sqlj.set_classpath( 'public', 'PWC273' );
+
+ select pwc273.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC273-1.jar', 'PWC273', 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 = "pwc273",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final boolean task2_pljava( String s ) throws SQLException {
+	logger.log( Level.INFO, "Entering pwc273.task2_pljava" );
+
+	Pattern p1 = Pattern.compile( "b" );
+	Pattern p2 = Pattern.compile( "b.*a" );
+
+	return p1.matcher( s ).find() && ! p2.matcher( s ).find();
+    }
+}