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+
+
+
+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();
+ }
+}