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+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU Affero General Public License is a free, copyleft license for
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+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<http://www.gnu.org/licenses/>.

dhp-build/dhp-build-assembly-resources/pom.xml

@@ -12,6 +12,8 @@
     <artifactId>dhp-build-assembly-resources</artifactId>
     <packaging>jar</packaging>
 
+    <description>This module contains a set of scripts supporting the build lifecycle for the dnet-hadoop project</description>
+
     <build>
         <plugins>
             <plugin>

dhp-build/dhp-build-properties-maven-plugin/pom.xml

@@ -12,22 +12,29 @@
     <artifactId>dhp-build-properties-maven-plugin</artifactId>
     <packaging>maven-plugin</packaging>
 
+    <description>This module is a maven plugin implementing custom properties substitutions in the build lifecycle</description>
 
     <dependencies>
         <dependency>
             <groupId>org.apache.maven</groupId>
             <artifactId>maven-plugin-api</artifactId>
-            <version>2.0</version>
+            <version>3.6.3</version>
         </dependency>
         <dependency>
             <groupId>org.apache.maven</groupId>
             <artifactId>maven-project</artifactId>
-            <version>2.0</version>
+            <version>2.2.1</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.maven</groupId>
+            <artifactId>maven-artifact</artifactId>
+            <version>2.2.1</version>
+        </dependency>
+
         <dependency>
             <groupId>org.kuali.maven.plugins</groupId>
             <artifactId>properties-maven-plugin</artifactId>
-            <version>1.3.2</version>
+            <version>${properties.maven.plugin.version}</version>
         </dependency>
         <dependency>
             <groupId>com.google.code.findbugs</groupId>
@@ -73,44 +80,10 @@
                 <artifactId>maven-javadoc-plugin</artifactId>
                 <configuration>
                     <detectLinks>true</detectLinks>
+                    <doclint>none</doclint>
                 </configuration>
             </plugin>
         </plugins>
-        <pluginManagement>
-        	<plugins>
-        		<!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.-->
-        		<plugin>
-        			<groupId>org.eclipse.m2e</groupId>
-        			<artifactId>lifecycle-mapping</artifactId>
-        			<version>1.0.0</version>
-        			<configuration>
-        				<lifecycleMappingMetadata>
-        					<pluginExecutions>
-        						<pluginExecution>
-        							<pluginExecutionFilter>
-        								<groupId>
-        									org.apache.maven.plugins
-        								</groupId>
-        								<artifactId>
-        									maven-plugin-plugin
-        								</artifactId>
-        								<versionRange>
-        									[3.2,)
-        								</versionRange>
-        								<goals>
-        									<goal>descriptor</goal>
-        								</goals>
-        							</pluginExecutionFilter>
-        							<action>
-        								<ignore />
-        							</action>
-        						</pluginExecution>
-        					</pluginExecutions>
-        				</lifecycleMappingMetadata>
-        			</configuration>
-        		</plugin>
-        	</plugins>
-        </pluginManagement>
     </build>
 
 </project>

dhp-build/dhp-build-properties-maven-plugin/src/main/java/eu/dnetlib/maven/plugin/properties/WritePredefinedProjectProperties.java

@@ -40,7 +40,7 @@ import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 
 /**
  * Writes project properties for the keys listed in specified properties files. Based on:
- * http://site.kuali.org/maven/plugins/properties-maven-plugin/1.3.2/write-project-properties-mojo.html
+ * http://site.kuali.org/maven/plugins/properties-maven-plugin/2.0.1/write-project-properties-mojo.html
  *
  * @author mhorst
  * @goal write-project-properties

dhp-build/dhp-build-properties-maven-plugin/src/test/java/eu/dnetlib/maven/plugin/properties/GenerateOoziePropertiesMojoTest.java

@@ -11,7 +11,7 @@ import org.junit.jupiter.api.Test;
 /** @author mhorst, claudio.atzori */
 public class GenerateOoziePropertiesMojoTest {
 
-	private GenerateOoziePropertiesMojo mojo = new GenerateOoziePropertiesMojo();
+	private final GenerateOoziePropertiesMojo mojo = new GenerateOoziePropertiesMojo();
 
 	@BeforeEach
 	public void clearSystemProperties() {

dhp-build/dhp-build-properties-maven-plugin/src/test/java/eu/dnetlib/maven/plugin/properties/WritePredefinedProjectPropertiesTest.java

@@ -366,7 +366,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	private Properties getStoredProperties(File testFolder)
-		throws FileNotFoundException, IOException {
+		throws IOException {
 		Properties properties = new Properties();
 		properties.load(new FileInputStream(getPropertiesFileLocation(testFolder)));
 		return properties;

dhp-build/dhp-code-style/pom.xml

@@ -11,6 +11,38 @@
 
     <packaging>jar</packaging>
 
+    <description>This module contains resources supporting common code style conventions</description>
+
+    <distributionManagement>
+        <snapshotRepository>
+            <id>dnet45-snapshots</id>
+            <name>DNet45 Snapshots</name>
+            <url>http://maven.research-infrastructures.eu/nexus/content/repositories/dnet45-snapshots</url>
+            <layout>default</layout>
+        </snapshotRepository>
+        <repository>
+            <id>dnet45-releases</id>
+            <url>http://maven.research-infrastructures.eu/nexus/content/repositories/dnet45-releases</url>
+        </repository>
+    </distributionManagement>
+
+    <build>
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-project-info-reports-plugin</artifactId>
+                    <version>3.0.0</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-site-plugin</artifactId>
+                    <version>3.7.1</version>
+                </plugin>
+            </plugins>
+        </pluginManagement>
+    </build>
+
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>

dhp-build/pom.xml

@@ -8,6 +8,9 @@
 	</parent>
 	<artifactId>dhp-build</artifactId>
 	<packaging>pom</packaging>
+
+	<description>This module is a container for the build tools used in dnet-hadoop</description>
+
 	<modules>
 		<module>dhp-code-style</module>
 		<module>dhp-build-assembly-resources</module>

dhp-common/pom.xml

@@ -12,6 +12,8 @@
 	<artifactId>dhp-common</artifactId>
 	<packaging>jar</packaging>
 
+	<description>This module contains common utilities meant to be used across the dnet-hadoop submodules</description>
+
 	<dependencies>
 
 		<dependency>

dhp-common/src/main/java/eu/dnetlib/dhp/utils/DHPUtils.java

@@ -21,7 +21,7 @@ public class DHPUtils {
 	public static String md5(final String s) {
 		try {
 			final MessageDigest md = MessageDigest.getInstance("MD5");
-			md.update(s.getBytes("UTF-8"));
+			md.update(s.getBytes(StandardCharsets.UTF_8));
 			return new String(Hex.encodeHex(md.digest()));
 		} catch (final Exception e) {
 			System.err.println("Error creating id");

dhp-common/src/main/java/eu/dnetlib/dhp/utils/saxon/NormalizeDate.java

@@ -17,7 +17,7 @@ public class NormalizeDate extends AbstractExtensionFunction {
 		"yyyy-MM-dd'T'hh:mm:ss", "yyyy-MM-dd", "yyyy/MM/dd", "yyyy"
 	};
 
-	private static final String normalizeOutFormat = new String("yyyy-MM-dd'T'hh:mm:ss'Z'");
+	private static final String normalizeOutFormat = "yyyy-MM-dd'T'hh:mm:ss'Z'";
 
 	@Override
 	public String getName() {

dhp-common/src/main/java/eu/dnetlib/message/MessageManager.java

@@ -21,7 +21,7 @@ public class MessageManager {
 
 	private Connection connection;
 
-	private Map<String, Channel> channels = new HashMap<>();
+	private final Map<String, Channel> channels = new HashMap<>();
 
 	private boolean durable;
 

dhp-schemas/pom.xml

@@ -12,7 +12,7 @@
     <artifactId>dhp-schemas</artifactId>
     <packaging>jar</packaging>
 
-
+    <description>This module contains common schema classes meant to be used across the dnet-hadoop submodules</description>
 
     <dependencies>
 

dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/action/AtomicActionDeserializer.java

@@ -16,7 +16,7 @@ public class AtomicActionDeserializer extends JsonDeserializer {
 
 	@Override
 	public Object deserialize(JsonParser jp, DeserializationContext ctxt)
-		throws IOException, JsonProcessingException {
+		throws IOException {
 		JsonNode node = jp.getCodec().readTree(jp);
 		String classTag = node.get("clazz").asText();
 		JsonNode payload = node.get("payload");

dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/common/ModelSupport.java

@@ -13,7 +13,7 @@ import eu.dnetlib.dhp.schema.oaf.*;
 public class ModelSupport {
 
 	/** Defines the mapping between the actual entity type and the main entity type */
-	private static Map<EntityType, MainEntityType> entityMapping = Maps.newHashMap();
+	private static final Map<EntityType, MainEntityType> entityMapping = Maps.newHashMap();
 
 	static {
 		entityMapping.put(EntityType.publication, MainEntityType.result);

dhp-workflows/dhp-actionmanager/src/main/java/eu/dnetlib/dhp/actionmanager/ISClient.java

@@ -32,7 +32,7 @@ public class ISClient implements Serializable {
 
 	private static final String INPUT_ACTION_SET_ID_SEPARATOR = ",";
 
-	private ISLookUpService isLookup;
+	private final ISLookUpService isLookup;
 
 	public ISClient(String isLookupUrl) {
 		isLookup = ISLookupClientFactory.getLookUpService(isLookupUrl);

dhp-workflows/dhp-actionmanager/src/main/java/eu/dnetlib/dhp/actionmanager/promote/PromoteActionPayloadFunctions.java

@@ -123,10 +123,10 @@ public class PromoteActionPayloadFunctions {
 	 * @param <G> Type of graph table row
 	 */
 	public static class TableAggregator<G extends Oaf> extends Aggregator<G, G, G> {
-		private SerializableSupplier<G> zeroFn;
+		private final SerializableSupplier<G> zeroFn;
-		private SerializableSupplier<BiFunction<G, G, G>> mergeAndGetFn;
+		private final SerializableSupplier<BiFunction<G, G, G>> mergeAndGetFn;
-		private SerializableSupplier<Function<G, Boolean>> isNotZeroFn;
+		private final SerializableSupplier<Function<G, Boolean>> isNotZeroFn;
-		private Class<G> rowClazz;
+		private final Class<G> rowClazz;
 
 		public TableAggregator(
 			SerializableSupplier<G> zeroFn,

dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/collection/worker/DnetCollectorWorkerApplication.java

@@ -20,7 +20,7 @@ public class DnetCollectorWorkerApplication {
 
 	private static final Logger log = LoggerFactory.getLogger(DnetCollectorWorkerApplication.class);
 
-	private static CollectorPluginFactory collectorPluginFactory = new CollectorPluginFactory();
+	private static final CollectorPluginFactory collectorPluginFactory = new CollectorPluginFactory();
 
 	private static ArgumentApplicationParser argumentParser;
 

dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/collection/worker/utils/CollectorPluginErrorLogList.java

@@ -9,7 +9,7 @@ public class CollectorPluginErrorLogList extends LinkedList<String> {
 
 	@Override
 	public String toString() {
-		String log = new String();
+		String log = "";
 		int index = 0;
 		for (final String errorMessage : this) {
 			log += String.format("Retry #%s: %s / ", index++, errorMessage);

dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/collection/worker/utils/XmlCleaner.java

@@ -11,22 +11,22 @@ import java.util.regex.Pattern;
 public class XmlCleaner {
 
 	/** Pattern for numeric entities. */
-	private static Pattern validCharacterEntityPattern = Pattern.compile("^&#x?\\d{2,4};"); // $NON-NLS-1$
+	private static final Pattern validCharacterEntityPattern = Pattern.compile("^&#x?\\d{2,4};"); // $NON-NLS-1$
 	// private static Pattern validCharacterEntityPattern = Pattern.compile("^&#?\\d{2,4};");
 	// //$NON-NLS-1$
 
 	// see https://www.w3.org/TR/REC-xml/#charsets , not only limited to 
-	private static Pattern invalidControlCharPattern = Pattern.compile("&#x?1[0-9a-fA-F];");
+	private static final Pattern invalidControlCharPattern = Pattern.compile("&#x?1[0-9a-fA-F];");
 
 	/**
 	 * Pattern that negates the allowable XML 4 byte unicode characters. Valid are: #x9 | #xA | #xD | [#x20-#xD7FF] |
 	 * [#xE000-#xFFFD] | [#x10000-#x10FFFF]
 	 */
-	private static Pattern invalidCharacterPattern = Pattern.compile("[^\t\r\n\u0020-\uD7FF\uE000-\uFFFD]"); // $NON-NLS-1$
+	private static final Pattern invalidCharacterPattern = Pattern.compile("[^\t\r\n\u0020-\uD7FF\uE000-\uFFFD]"); // $NON-NLS-1$
 
 	// Map entities to their unicode equivalent
-	private static Set<String> goodEntities = new HashSet<>();
+	private static final Set<String> goodEntities = new HashSet<>();
-	private static Map<String, String> badEntities = new HashMap<>();
+	private static final Map<String, String> badEntities = new HashMap<>();
 
 	static {
 		// pre-defined XML entities

dhp-workflows/dhp-aggregation/src/test/java/eu/dnetlib/dhp/collector/worker/DnetCollectorWorkerApplicationTests.java

@@ -21,8 +21,8 @@ import eu.dnetlib.message.MessageManager;
 
 public class DnetCollectorWorkerApplicationTests {
 
-	private ArgumentApplicationParser argumentParser = mock(ArgumentApplicationParser.class);
+	private final ArgumentApplicationParser argumentParser = mock(ArgumentApplicationParser.class);
-	private MessageManager messageManager = mock(MessageManager.class);
+	private final MessageManager messageManager = mock(MessageManager.class);
 
 	private DnetCollectorWorker worker;
 

dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/DedupUtility.java

@@ -2,6 +2,7 @@
 package eu.dnetlib.dhp.oa.dedup;
 
 import java.io.StringReader;
+import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
 import java.text.Normalizer;
 import java.util.*;
@@ -73,7 +74,7 @@ public class DedupUtility {
 	public static String md5(final String s) {
 		try {
 			final MessageDigest md = MessageDigest.getInstance("MD5");
-			md.update(s.getBytes("UTF-8"));
+			md.update(s.getBytes(StandardCharsets.UTF_8));
 			return new String(Hex.encodeHex(md.digest()));
 		} catch (final Exception e) {
 			System.err.println("Error creating id");

dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/SparkReporter.java

@@ -15,7 +15,7 @@ public class SparkReporter implements Serializable, Reporter {
 
 	private final List<Tuple2<String, String>> relations = new ArrayList<>();
 
-	private Map<String, LongAccumulator> accumulators;
+	private final Map<String, LongAccumulator> accumulators;
 
 	public SparkReporter(Map<String, LongAccumulator> accumulators) {
 		this.accumulators = accumulators;

dhp-workflows/dhp-dedup-scholexplorer/src/main/java/eu/dnetlib/dedup/DedupUtility.java

@@ -106,7 +106,7 @@ public class DedupUtility {
 	public static String md5(final String s) {
 		try {
 			final MessageDigest md = MessageDigest.getInstance("MD5");
-			md.update(s.getBytes("UTF-8"));
+			md.update(s.getBytes(StandardCharsets.UTF_8));
 			return new String(Hex.encodeHex(md.digest()));
 		} catch (final Exception e) {
 			System.err.println("Error creating id");

dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/AbstractMdRecordToOafMapper.java

@@ -410,14 +410,10 @@ public abstract class AbstractMdRecordToOafMapper {
 
 		final String identifier = n.valueOf("./*[local-name()='identifier']");
 		final String baseURL = n.valueOf("./*[local-name()='baseURL']");
-		;
 		final String metadataNamespace = n.valueOf("./*[local-name()='metadataNamespace']");
-		;
 		final boolean altered = n.valueOf("@altered").equalsIgnoreCase("true");
 		final String datestamp = n.valueOf("./*[local-name()='datestamp']");
-		;
 		final String harvestDate = n.valueOf("@harvestDate");
-		;
 
 		return oaiIProvenance(identifier, baseURL, metadataNamespace, altered, datestamp, harvestDate);
 	}

dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/MigrateDbEntitiesApplication.java

@@ -51,7 +51,7 @@ import eu.dnetlib.dhp.schema.oaf.Software;
 import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
 
 public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
-	implements Closeable {
+		implements Closeable {
 
 	private static final Log log = LogFactory.getLog(MigrateDbEntitiesApplication.class);
 
@@ -61,11 +61,9 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 
 	public static void main(final String[] args) throws Exception {
 		final ArgumentApplicationParser parser = new ArgumentApplicationParser(
-			IOUtils
+				IOUtils
-				.toString(
+						.toString(MigrateDbEntitiesApplication.class
-					MigrateDbEntitiesApplication.class
+								.getResourceAsStream("/eu/dnetlib/dhp/oa/graph/migrate_db_entities_parameters.json")));
-						.getResourceAsStream(
-							"/eu/dnetlib/dhp/oa/graph/migrate_db_entities_parameters.json")));
 
 		parser.parseArgument(args);
 
@@ -78,7 +76,7 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 		final boolean processClaims = parser.get("action") != null && parser.get("action").equalsIgnoreCase("claims");
 
 		try (final MigrateDbEntitiesApplication smdbe = new MigrateDbEntitiesApplication(hdfsPath, dbUrl, dbUser,
-			dbPassword)) {
+				dbPassword)) {
 			if (processClaims) {
 				log.info("Processing claims...");
 				smdbe.execute("queryClaims.sql", smdbe::processClaims);
@@ -109,15 +107,15 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 	}
 
 	public MigrateDbEntitiesApplication(
-		final String hdfsPath, final String dbUrl, final String dbUser, final String dbPassword)
+			final String hdfsPath, final String dbUrl, final String dbUser, final String dbPassword)
-		throws Exception {
+			throws Exception {
 		super(hdfsPath);
 		this.dbClient = new DbClient(dbUrl, dbUser, dbPassword);
 		this.lastUpdateTimestamp = new Date().getTime();
 	}
 
 	public void execute(final String sqlFile, final Function<ResultSet, List<Oaf>> producer)
-		throws Exception {
+			throws Exception {
 		final String sql = IOUtils.toString(getClass().getResourceAsStream("/eu/dnetlib/dhp/oa/graph/sql/" + sqlFile));
 
 		final Consumer<ResultSet> consumer = rs -> producer.apply(rs).forEach(oaf -> emitOaf(oaf));
@@ -136,10 +134,7 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 			ds.setId(createOpenaireId(10, rs.getString("datasourceid"), true));
 			ds.setOriginalId(Arrays.asList(rs.getString("datasourceid")));
 			ds
-				.setCollectedfrom(
+					.setCollectedfrom(listKeyValues(createOpenaireId(10, rs.getString("collectedfromid"), true), rs.getString("collectedfromname")));
-					listKeyValues(
-						createOpenaireId(10, rs.getString("collectedfromid"), true),
-						rs.getString("collectedfromname")));
 			ds.setPid(new ArrayList<>());
 			ds.setDateofcollection(asString(rs.getDate("dateofcollection")));
 			ds.setDateoftransformation(null); // Value not returned by the SQL query
@@ -180,8 +175,7 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 			ds.setCertificates(field(rs.getString("certificates"), info));
 			ds.setPolicies(new ArrayList<>()); // The sql query returns an empty array
 			ds
-				.setJournal(
+					.setJournal(prepareJournal(rs.getString("officialname"), rs.getString("journal"), info)); // Journal
-					prepareJournal(rs.getString("officialname"), rs.getString("journal"), info)); // Journal
 			ds.setDataInfo(info);
 			ds.setLastupdatetimestamp(lastUpdateTimestamp);
 
@@ -201,10 +195,7 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 			p.setId(createOpenaireId(40, rs.getString("projectid"), true));
 			p.setOriginalId(Arrays.asList(rs.getString("projectid")));
 			p
-				.setCollectedfrom(
+					.setCollectedfrom(listKeyValues(createOpenaireId(10, rs.getString("collectedfromid"), true), rs.getString("collectedfromname")));
-					listKeyValues(
-						createOpenaireId(10, rs.getString("collectedfromid"), true),
-						rs.getString("collectedfromname")));
 			p.setPid(new ArrayList<>());
 			p.setDateofcollection(asString(rs.getDate("dateofcollection")));
 			p.setDateoftransformation(asString(rs.getDate("dateoftransformation")));
@@ -221,8 +212,7 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 			p.setDuration(field(Integer.toString(rs.getInt("duration")), info));
 			p.setEcsc39(field(Boolean.toString(rs.getBoolean("ecsc39")), info));
 			p
-				.setOamandatepublications(
+					.setOamandatepublications(field(Boolean.toString(rs.getBoolean("oamandatepublications")), info));
-					field(Boolean.toString(rs.getBoolean("oamandatepublications")), info));
 			p.setEcarticle29_3(field(Boolean.toString(rs.getBoolean("ecarticle29_3")), info));
 			p.setSubjects(prepareListOfStructProps(rs.getArray("subjects"), info));
 			p.setFundingtree(prepareListFields(rs.getArray("fundingtree"), info));
@@ -259,10 +249,7 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 			o.setId(createOpenaireId(20, rs.getString("organizationid"), true));
 			o.setOriginalId(Arrays.asList(rs.getString("organizationid")));
 			o
-				.setCollectedfrom(
+					.setCollectedfrom(listKeyValues(createOpenaireId(10, rs.getString("collectedfromid"), true), rs.getString("collectedfromname")));
-					listKeyValues(
-						createOpenaireId(10, rs.getString("collectedfromid"), true),
-						rs.getString("collectedfromname")));
 			o.setPid(new ArrayList<>());
 			o.setDateofcollection(asString(rs.getDate("dateofcollection")));
 			o.setDateoftransformation(asString(rs.getDate("dateoftransformation")));
@@ -277,15 +264,12 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 			o.setEclegalperson(field(Boolean.toString(rs.getBoolean("eclegalperson")), info));
 			o.setEcnonprofit(field(Boolean.toString(rs.getBoolean("ecnonprofit")), info));
 			o
-				.setEcresearchorganization(
+					.setEcresearchorganization(field(Boolean.toString(rs.getBoolean("ecresearchorganization")), info));
-					field(Boolean.toString(rs.getBoolean("ecresearchorganization")), info));
 			o.setEchighereducation(field(Boolean.toString(rs.getBoolean("echighereducation")), info));
 			o
-				.setEcinternationalorganizationeurinterests(
+					.setEcinternationalorganizationeurinterests(field(Boolean.toString(rs.getBoolean("ecinternationalorganizationeurinterests")), info));
-					field(Boolean.toString(rs.getBoolean("ecinternationalorganizationeurinterests")), info));
 			o
-				.setEcinternationalorganization(
+					.setEcinternationalorganization(field(Boolean.toString(rs.getBoolean("ecinternationalorganization")), info));
-					field(Boolean.toString(rs.getBoolean("ecinternationalorganization")), info));
 			o.setEcenterprise(field(Boolean.toString(rs.getBoolean("ecenterprise")), info));
 			o.setEcsmevalidated(field(Boolean.toString(rs.getBoolean("ecsmevalidated")), info));
 			o.setEcnutscode(field(Boolean.toString(rs.getBoolean("ecnutscode")), info));
@@ -304,9 +288,7 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 			final DataInfo info = prepareDataInfo(rs);
 			final String orgId = createOpenaireId(20, rs.getString("organization"), true);
 			final String dsId = createOpenaireId(10, rs.getString("datasource"), true);
-			final List<KeyValue> collectedFrom = listKeyValues(
+			final List<KeyValue> collectedFrom = listKeyValues(createOpenaireId(10, rs.getString("collectedfromid"), true), rs.getString("collectedfromname"));
-				createOpenaireId(10, rs.getString("collectedfromid"), true),
-				rs.getString("collectedfromname"));
 
 			final Relation r1 = new Relation();
 			r1.setRelType("datasourceOrganization");
@@ -339,9 +321,7 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 			final DataInfo info = prepareDataInfo(rs);
 			final String orgId = createOpenaireId(20, rs.getString("resporganization"), true);
 			final String projectId = createOpenaireId(40, rs.getString("project"), true);
-			final List<KeyValue> collectedFrom = listKeyValues(
+			final List<KeyValue> collectedFrom = listKeyValues(createOpenaireId(10, rs.getString("collectedfromid"), true), rs.getString("collectedfromname"));
-				createOpenaireId(10, rs.getString("collectedfromid"), true),
-				rs.getString("collectedfromname"));
 
 			final Relation r1 = new Relation();
 			r1.setRelType("projectOrganization");
@@ -371,17 +351,10 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 
 	public List<Oaf> processClaims(final ResultSet rs) {
 
-		final DataInfo info = dataInfo(
+		final DataInfo info =
-			false,
+				dataInfo(false, null, false, false, qualifier("user:claim", "user:claim", "dnet:provenanceActions", "dnet:provenanceActions"), "0.9");
-			null,
-			false,
-			false,
-			qualifier(
-				"user:claim", "user:claim", "dnet:provenanceActions", "dnet:provenanceActions"),
-			"0.9");
 
-		final List<KeyValue> collectedFrom = listKeyValues(
+		final List<KeyValue> collectedFrom = listKeyValues(createOpenaireId(10, "infrastruct_::openaire", true), "OpenAIRE");
-			createOpenaireId(10, "infrastruct_::openaire", true), "OpenAIRE");
 
 		try {
 
@@ -467,19 +440,11 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 		final String inferenceprovenance = rs.getString("inferenceprovenance");
 		final Boolean inferred = rs.getBoolean("inferred");
 		final String trust = rs.getString("trust");
-		return dataInfo(
+		return dataInfo(deletedbyinference, inferenceprovenance, inferred, false, MigrationConstants.ENTITYREGISTRY_PROVENANCE_ACTION, trust);
-			deletedbyinference,
-			inferenceprovenance,
-			inferred,
-			false,
-			MigrationConstants.ENTITYREGISTRY_PROVENANCE_ACTION,
-			trust);
 	}
 
 	private Qualifier prepareQualifierSplitting(final String s) {
-		if (StringUtils.isBlank(s)) {
+		if (StringUtils.isBlank(s)) { return null; }
-			return null;
-		}
 		final String[] arr = s.split("@@@");
 		return arr.length == 4 ? qualifier(arr[0], arr[1], arr[2], arr[3]) : null;
 	}
@@ -493,22 +458,19 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 	}
 
 	private StructuredProperty prepareStructProp(final String s, final DataInfo dataInfo) {
-		if (StringUtils.isBlank(s)) {
+		if (StringUtils.isBlank(s)) { return null; }
-			return null;
-		}
 		final String[] parts = s.split("###");
 		if (parts.length == 2) {
 			final String value = parts[0];
 			final String[] arr = parts[1].split("@@@");
-			if (arr.length == 4) {
+			if (arr.length == 4) { return structuredProperty(value, arr[0], arr[1], arr[2], arr[3], dataInfo); }
-				return structuredProperty(value, arr[0], arr[1], arr[2], arr[3], dataInfo);
-			}
 		}
 		return null;
 	}
 
 	private List<StructuredProperty> prepareListOfStructProps(
-		final Array array, final DataInfo dataInfo) throws SQLException {
+			final Array array,
+			final DataInfo dataInfo) throws SQLException {
 		final List<StructuredProperty> res = new ArrayList<>();
 		if (array != null) {
 			for (final String s : (String[]) array.getArray()) {
@@ -526,11 +488,9 @@ public class MigrateDbEntitiesApplication extends AbstractMigrationApplication
 		if (StringUtils.isNotBlank(sj)) {
 			final String[] arr = sj.split("@@@");
 			if (arr.length == 3) {
-				final String issn = StringUtils.isNotBlank(arr[0]) ? arr[0] : null;
+				final String issn = StringUtils.isNotBlank(arr[0]) ? arr[0].trim() : null;
-				final String eissn = StringUtils.isNotBlank(arr[1]) ? arr[1] : null;
+				final String eissn = StringUtils.isNotBlank(arr[1]) ? arr[1].trim() : null;;
-				;
+				final String lissn = StringUtils.isNotBlank(arr[2]) ? arr[2].trim() : null;;
-				final String lissn = StringUtils.isNotBlank(arr[2]) ? arr[2] : null;
-				;
 				if (issn != null || eissn != null || lissn != null) {
 					return journal(name, issn, eissn, eissn, null, null, null, null, null, null, null, info);
 				}

dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/common/DbClient.java

@@ -14,7 +14,7 @@ public class DbClient implements Closeable {
 
 	private static final Log log = LogFactory.getLog(DbClient.class);
 
-	private Connection connection;
+	private final Connection connection;
 
 	public DbClient(final String address, final String login, final String password) {
 

dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/common/PacePerson.java

@@ -2,6 +2,7 @@
 package eu.dnetlib.dhp.oa.graph.raw.common;
 
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.text.Normalizer;
 import java.util.HashSet;
 import java.util.List;
@@ -141,7 +142,7 @@ public class PacePerson {
 	public String hash() {
 		return Hashing
 			.murmur3_128()
-			.hashString(getNormalisedFullname(), Charset.forName(UTF8))
+			.hashString(getNormalisedFullname(), StandardCharsets.UTF_8)
 			.toString();
 	}
 

dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/sx/graph/parser/AbstractScholexplorerParser.java

@@ -25,7 +25,7 @@ public abstract class AbstractScholexplorerParser {
 
 	protected static final Log log = LogFactory.getLog(AbstractScholexplorerParser.class);
 	static final Pattern pattern = Pattern.compile("10\\.\\d{4,9}/[-._;()/:A-Z0-9]+$", Pattern.CASE_INSENSITIVE);
-	private List<String> datasetSubTypes = Arrays
+	private final List<String> datasetSubTypes = Arrays
 		.asList(
 			"dataset",
 			"software",

dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/sql/queryDatasources.sql

@@ -108,7 +108,7 @@ SELECT
 		ELSE 'Other'
 	END || '@@@dnet:datasource_typologies@@@dnet:datasource_typologies'                               AS datasourcetype,
 	'sysimport:crosswalk:entityregistry@@@sysimport:crosswalk:entityregistry@@@dnet:provenance_actions@@@dnet:provenance_actions' AS provenanceaction,
-	CONCAT(d.issn, '@@@', d.eissn, '@@@', d.lissn)                                                    AS journal
+	CONCAT(d.issn, ' @@@ ', d.eissn, ' @@@ ', d.lissn)                                                    AS journal
 
 FROM dsm_datasources d
 

dhp-workflows/dhp-graph-provision-scholexplorer/src/main/java/eu/dnetlib/dhp/provision/update/CrossRefParserJSON.java

@@ -18,7 +18,7 @@ import eu.dnetlib.dhp.utils.DHPUtils;
 
 public class CrossRefParserJSON {
 
-	private static List<ScholixCollectedFrom> collectedFrom = generateCrossrefCollectedFrom("complete");
+	private static final List<ScholixCollectedFrom> collectedFrom = generateCrossrefCollectedFrom("complete");
 
 	public static ScholixResource parseRecord(final String record) {
 		if (record == null)

dhp-workflows/dhp-graph-provision-scholexplorer/src/main/java/eu/dnetlib/dhp/provision/update/DataciteClient.java

@@ -16,7 +16,7 @@ public class DataciteClient {
 	private String host;
 	private String index = "datacite";
 	private String indexType = "dump";
-	private Datacite2Scholix d2s;
+	private final Datacite2Scholix d2s;
 
 	public DataciteClient(String host) {
 		this.host = host;

dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/utils/RelationPartitioner.java

@@ -12,7 +12,7 @@ import eu.dnetlib.dhp.oa.provision.model.SortableRelation;
  */
 public class RelationPartitioner extends Partitioner {
 
-	private int numPartitions;
+	private final int numPartitions;
 
 	public RelationPartitioner(int numPartitions) {
 		this.numPartitions = numPartitions;

dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/utils/StreamingInputDocumentFactory.java

@@ -46,7 +46,7 @@ public class StreamingInputDocumentFactory {
 
 	private static final String INDEX_RECORD_ID = INDEX_FIELD_PREFIX + "indexrecordidentifier";
 
-	private static final String outFormat = new String("yyyy-MM-dd'T'hh:mm:ss'Z'");
+	private static final String outFormat = "yyyy-MM-dd'T'hh:mm:ss'Z'";
 
 	private static final List<String> dateFormats = Arrays
 		.asList("yyyy-MM-dd'T'hh:mm:ss", "yyyy-MM-dd", "dd-MM-yyyy", "dd/MM/yyyy", "yyyy");
@@ -61,15 +61,18 @@ public class StreamingInputDocumentFactory {
 
 	private static final int MAX_FIELD_LENGTH = 25000;
 
-	private ThreadLocal<XMLInputFactory> inputFactory = ThreadLocal.withInitial(() -> XMLInputFactory.newInstance());
+	private final ThreadLocal<XMLInputFactory> inputFactory = ThreadLocal
+		.withInitial(() -> XMLInputFactory.newInstance());
 
-	private ThreadLocal<XMLOutputFactory> outputFactory = ThreadLocal.withInitial(() -> XMLOutputFactory.newInstance());
+	private final ThreadLocal<XMLOutputFactory> outputFactory = ThreadLocal
+		.withInitial(() -> XMLOutputFactory.newInstance());
 
-	private ThreadLocal<XMLEventFactory> eventFactory = ThreadLocal.withInitial(() -> XMLEventFactory.newInstance());
+	private final ThreadLocal<XMLEventFactory> eventFactory = ThreadLocal
+		.withInitial(() -> XMLEventFactory.newInstance());
 
-	private String version;
+	private final String version;
 
-	private String dsId;
+	private final String dsId;
 
 	private String resultName = DEFAULTDNETRESULT;
 

dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/utils/TemplateFactory.java

@@ -17,7 +17,7 @@ import eu.dnetlib.dhp.schema.oaf.OafEntity;
 
 public class TemplateFactory {
 
-	private TemplateResources resources;
+	private final TemplateResources resources;
 
 	private static final char DELIMITER = '$';
 

dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/utils/TemplateResources.java

@@ -8,17 +8,17 @@ import com.google.common.io.Resources;
 
 public class TemplateResources {
 
-	private String record = read("eu/dnetlib/dhp/oa/provision/template/record.st");
+	private final String record = read("eu/dnetlib/dhp/oa/provision/template/record.st");
 
-	private String instance = read("eu/dnetlib/dhp/oa/provision/template/instance.st");
+	private final String instance = read("eu/dnetlib/dhp/oa/provision/template/instance.st");
 
-	private String rel = read("eu/dnetlib/dhp/oa/provision/template/rel.st");
+	private final String rel = read("eu/dnetlib/dhp/oa/provision/template/rel.st");
 
-	private String webresource = read("eu/dnetlib/dhp/oa/provision/template/webresource.st");
+	private final String webresource = read("eu/dnetlib/dhp/oa/provision/template/webresource.st");
 
-	private String child = read("eu/dnetlib/dhp/oa/provision/template/child.st");
+	private final String child = read("eu/dnetlib/dhp/oa/provision/template/child.st");
 
-	private String entity = read("eu/dnetlib/dhp/oa/provision/template/entity.st");
+	private final String entity = read("eu/dnetlib/dhp/oa/provision/template/entity.st");
 
 	private static String read(final String classpathResource) throws IOException {
 		return Resources.toString(Resources.getResource(classpathResource), StandardCharsets.UTF_8);

dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/utils/XmlRecordFactory.java

@@ -48,13 +48,13 @@ import eu.dnetlib.dhp.schema.oaf.Result;
 public class XmlRecordFactory implements Serializable {
 
 	public static final String REL_SUBTYPE_DEDUP = "dedup";
-	private Map<String, LongAccumulator> accumulators;
+	private final Map<String, LongAccumulator> accumulators;
 
-	private Set<String> specialDatasourceTypes;
+	private final Set<String> specialDatasourceTypes;
 
-	private ContextMapper contextMapper;
+	private final ContextMapper contextMapper;
 
-	private String schemaLocation;
+	private final String schemaLocation;
 
 	private boolean indent = false;
 

dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/utils/XmlSerializationUtils.java

@@ -41,7 +41,7 @@ public class XmlSerializationUtils {
 
 	public static String mapStructuredProperty(String name, StructuredProperty t) {
 		return asXmlElement(
-			name, t.getValue(), t.getQualifier(), t.getDataInfo() != null ? t.getDataInfo() : null);
+			name, t.getValue(), t.getQualifier(), t.getDataInfo());
 	}
 
 	public static String mapQualifier(String name, Qualifier q) {

dhp-workflows/dhp-graph-provision/src/test/java/eu/dnetlib/dhp/oa/provision/GraphJoinerTest.java

@@ -9,7 +9,7 @@ import org.junit.jupiter.api.BeforeEach;
 
 public class GraphJoinerTest {
 
-	private ClassLoader cl = getClass().getClassLoader();
+	private final ClassLoader cl = getClass().getClassLoader();
 	private Path workingDir;
 	private Path inputDir;
 	private Path outputDir;

dhp-workflows/dhp-stats-update/pom.xml

@@ -22,6 +22,7 @@
 			<plugin>
 				<groupId>pl.project13.maven</groupId>
 				<artifactId>git-commit-id-plugin</artifactId>
+                <version>2.1.11</version>
 				<configuration>
 					<failOnNoGitDirectory>false</failOnNoGitDirectory>
 				</configuration>