Simple prototype

src/main/java/de/vanitasvitae/imi/codes/InputValidator.java

@@ -1,5 +1,6 @@
 package de.vanitasvitae.imi.codes;
 
+import java.io.File;
 import java.util.regex.Pattern;
 
 public class InputValidator {
@@ -74,4 +75,19 @@ public class InputValidator {
 
         return i;
     }
+
+    /**
+     * Validate, that the user-provided path is writable and that any parent folders exist.
+     * Otherwise throw a {@link InvalidOptionException}.
+     *
+     * @param path file path (absolut or relative) as a string.
+     * @return file
+     *
+     * @throws InvalidOptionException in case any parent folder does not exist, the path points to a directory or the
+     * destination is not writable.
+     */
+    public static File validateOutputPath(String path) throws InvalidOptionException {
+        // TODO
+        return null;
+    }
 }

src/main/java/de/vanitasvitae/imi/codes/Main.java

@@ -1,5 +1,7 @@
 package de.vanitasvitae.imi.codes;
 
+import java.io.File;
+
 import org.apache.commons.cli.CommandLine;
 import org.apache.commons.cli.CommandLineParser;
 import org.apache.commons.cli.DefaultParser;
@@ -26,11 +28,38 @@ public class Main {
             return;
         }
 
-        // User issues '-h', so just show help text and exit.
+        // User issues '-h', so just show help text and exit right now.
         if (arguments.hasOption(Arguments.HELP)) {
             printHelp(options);
             return;
         }
+
+        // Parse arguments
+        String studyNumber;
+        SampleType sampleType;
+        int numberOfCodes;
+        File outputPath;
+        boolean externalBrowser;
+
+        try {
+            studyNumber = InputValidator.validateStudyNumber(arguments.getOptionValue(Arguments.STUDY_NUMBER));
+            sampleType = InputValidator.validateSampleType(arguments.getOptionValue(Arguments.SAMPLE_TYPE));
+            numberOfCodes = InputValidator.validateNumberOfCodes(arguments.getOptionValue(Arguments.NUMBER_CODES));
+            outputPath = InputValidator.validateOutputPath(arguments.getOptionValue(Arguments.OUTPUT_DESTINATION));
+            externalBrowser = arguments.hasOption(Arguments.EXTERNAL_BROWSER);
+        } catch (InvalidOptionException e) {
+            // Something is wrong with the users input, so exit.
+            System.out.println(e.getMessage());
+            return;
+        }
+
+        // Debug. TODO: Remove
+        System.out.println("StudyNr: " + studyNumber + " sampleType: " + sampleType + " #codes: " + numberOfCodes
+                + " output: " + outputPath + " browser: " + externalBrowser);
+
+        for (int i = 0; i < numberOfCodes; i++) {
+            System.out.format("%s%04d%n", studyNumber + sampleType, i);
+        }
     }
 
     /**