PWC 287

Task 1 Raku done
Task 2 Raku done

Task 1 PL/Perl done
Task 2 PL/Perl done

Task 1 PL/PgSQL done
Task 2 PL/PgSQL done

Task 1 PL/Java done
Task 2 PL/Java done

Task 1 Python done
Task 2 Python done

3 files changed, 197 insertions, 0 deletions

diff --git a/challenge-287/luca-ferrari/pljava/pom.xml b/challenge-287/luca-ferrari/pljava/pom.xml
new file mode 100644
index 0000000000..47fa2f66a2
--- /dev/null
+++ b/challenge-287/luca-ferrari/pljava/pom.xml
@@ -0,0 +1,72 @@
+
+<project
+ xmlns="http://maven.apache.org/POM/4.0.0"
+ xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation= "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" >
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>PWC</groupId>
+  <artifactId>
+    PWC287
+  </artifactId>
+  <version>
+    1
+  </version>
+
+  <name>Perl Weekly Challenge 287 with package PWC287</name>
+  <description>Implementation of the tasks in PL/Java for PWC 287</description>
+
+  <properties>
+    <project.build.sourceEncoding>US-ASCII</project.build.sourceEncoding>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.postgresql</groupId>
+      <artifactId>pljava-api</artifactId>
+      <version>1.6.6</version>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.8.1</version>
+        <configuration>
+          <release>9</release>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+        <version>2.6</version>
+        <configuration>
+          <archive>
+            <manifest>
+              <!-- This identifies and version-stamps the jar.
+                 Not essential, but easy and useful. -->
+              <addDefaultImplementationEntries>
+                true
+              </addDefaultImplementationEntries>
+            </manifest>
+
+            <manifestSections>
+              <!-- This identifies a file in the jar named
+                 pljava.ddr as an SQLJDeploymentDescriptor. -->
+              <manifestSection>
+                <name>pljava.ddr</name>
+                <manifestEntries>
+                  <SQLJDeploymentDescriptor>
+                    true
+                  </SQLJDeploymentDescriptor>
+                </manifestEntries>
+              </manifestSection>
+            </manifestSections>
+          </archive>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+</project>
diff --git a/challenge-287/luca-ferrari/pljava/src/main/java/Task1.java b/challenge-287/luca-ferrari/pljava/src/main/java/Task1.java
new file mode 100644
index 0000000000..8990641a74
--- /dev/null
+++ b/challenge-287/luca-ferrari/pljava/src/main/java/Task1.java
@@ -0,0 +1,67 @@
+
+
+
+package PWC287;
+
+/**
+ * PL/Java implementation for PWC 287
+ * Task 1
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-287>
+ *
+ *
+ * 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/PWC287-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC287-1.jar', 'PWC287', true );
+ select sqlj.set_classpath( 'public', 'PWC287' );
+
+ select pwc287.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC287-1.jar', 'PWC287', 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.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Task1 {
+
+    private final static Logger logger = Logger.getAnonymousLogger();
+
+    @Function( schema = "pwc287",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final boolean task1_pljava( String password ) throws SQLException {
+	if ( password.length() < 6 )
+	    return false;
+
+	Pattern lowerCase   = Pattern.compile( "[a-z]" );
+	Pattern upperCase   = Pattern.compile( "[A-Z]" );
+	Pattern digit       = Pattern.compile( "[0-9]" );
+	Pattern repetitions = Pattern.compile( "(.)\\1\\1" );
+
+	return lowerCase.matcher( password ).find()
+	    && upperCase.matcher( password ).find()
+	    && digit.matcher( password ).find()
+	    && ! repetitions.matcher( password ).find();
+    }
+}
diff --git a/challenge-287/luca-ferrari/pljava/src/main/java/Task2.java b/challenge-287/luca-ferrari/pljava/src/main/java/Task2.java
new file mode 100644
index 0000000000..0c3a926c16
--- /dev/null
+++ b/challenge-287/luca-ferrari/pljava/src/main/java/Task2.java
@@ -0,0 +1,58 @@
+
+
+
+package PWC287;
+
+/**
+ * PL/Java implementation for PWC 287
+ * Task 2
+ * See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-287>
+ *
+ *
+ * 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/PWC287-1.jar  luca@rachel:/tmp
+
+
+ * To install into PostgreSQL execute:
+
+ select sqlj.install_jar( 'file:///tmp/PWC287-1.jar', 'PWC287', true );
+ select sqlj.set_classpath( 'public', 'PWC287' );
+
+ select pwc287.task2_pljava();
+
+ and then to redeploy:
+
+ select sqlj.replace_jar( 'file:///tmp/PWC287-1.jar', 'PWC287', 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.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+
+public class Task2 {
+
+    private final static Logger logger = Logger.getAnonymousLogger();
+
+    @Function( schema = "pwc287",
+	       onNullInput = RETURNS_NULL,
+	       effects = IMMUTABLE )
+    public static final boolean task2_pljava( String number ) throws SQLException {
+	Pattern numberRegexp = Pattern.compile( "^[+-]?\\d+([.]\\d+)?(E[+-]?\\d+)?$" );
+	return numberRegexp.matcher( number ).find();
+    }
+}