Create migrate command to update the golden masters

src/main/java/de/retest/recheck/cli/subcommands/Migrate.java

@@ -0,0 +1,86 @@
+package de.retest.recheck.cli.subcommands;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import de.retest.recheck.Properties;
+import de.retest.recheck.configuration.ProjectRootFinderUtil;
+import de.retest.recheck.persistence.GoldenMasterProviderImpl;
+import de.retest.recheck.persistence.NoGoldenMasterFoundException;
+import de.retest.recheck.persistence.Persistence;
+import de.retest.recheck.persistence.PersistenceFactory;
+import de.retest.recheck.persistence.xml.util.StdXmlClassesProvider;
+import de.retest.recheck.ui.descriptors.SutState;
+import picocli.CommandLine.Command;
+import picocli.CommandLine.Option;
+import picocli.CommandLine.Parameters;
+
+@Command( name = "migrate", description = "Migrate Golden Master(s)." )
+public class Migrate implements Runnable {
+
+	private static final String RECHECK_FOLDER = "/src/test/resources/retest/recheck";
+	private static final Logger logger = LoggerFactory.getLogger( Migrate.class );
+
+	@Option( names = "--help", usageHelp = true, hidden = true )
+	private boolean displayHelp;
+
+	@Parameters( arity = "1", defaultValue = "", description = "The path of the Golden Master(s)." )
+	private String goldenMasterPath;
+
+	private final GoldenMasterProviderImpl goldenMasterProvider =
+			new GoldenMasterProviderImpl( createSutStatePersistence() );
+
+	@Override
+	public void run() {
+		try {
+			migrateAllGoldenMasters( getAllGoldenMasters() );
+		} catch ( final IOException e ) {
+			logger.error( "The directory '{}' does not exist.", e.getMessage() );
+		} catch ( final NoGoldenMasterFoundException e ) {
+			logger.error( "There is no Golden Master(s) in the  directory '{}'.", e.getFilename() );
+		}
+	}
+
+	private void migrateAllGoldenMasters( final List<String> goldenMastersPaths ) throws NoGoldenMasterFoundException {
+		if ( goldenMastersPaths.isEmpty() ) {
+			throw new NoGoldenMasterFoundException( goldenMasterPath );
+		}
+		goldenMastersPaths.stream().forEach( path -> {
+			final File file = new File( path );
+			final SutState sutState = goldenMasterProvider.loadGoldenMaster( file );
+			goldenMasterProvider.saveGoldenMaster( file, sutState );
+		} );
+	}
+
+	private List<String> getAllGoldenMasters() throws IOException {
+		final String path = !goldenMasterPath.equals( "" ) ? goldenMasterPath : RECHECK_FOLDER;
+		final File gmPath =
+				ProjectRootFinderUtil.getProjectRoot().map( gm -> Paths.get( gm.toAbsolutePath().toString(), path ) )
+						.map( Path::toFile ).orElseThrow( () -> new IOException() );
+		try ( final Stream<Path> goldenMasterPaths = Files.walk( gmPath.toPath() ) ) {
+			return goldenMasterPaths.filter( goldenMaster -> goldenMaster.endsWith( Properties.DEFAULT_XML_FILE_NAME ) )
+					.map( goldenMaster -> goldenMaster.getParent().toString() ).collect( Collectors.toList() );
+		}
+	}
+
+	private static Persistence<SutState> createSutStatePersistence() {
+		return new PersistenceFactory( new HashSet<>( Arrays.asList( StdXmlClassesProvider.getXmlDataClasses() ) ) )
+				.getPersistence();
+	}
+
+	boolean isDisplayHelp() {
+		return displayHelp;
+	}
+
+}