copied command line support from OHDM here.

Author: thsc42

src/net/sharksystem/utils/Commandline.java

@@ -0,0 +1,41 @@
+package net.sharksystem.utils;
+
+import java.util.HashMap;
+
+public class Commandline {
+    public static HashMap<String, String> parametersToMap(String args[], boolean valueRequired, String helpMessage) {
+        if(valueRequired && args.length % 2 != 0) {
+            System.err.println("malformed parameter list: each parameter needs a value. ");
+            System.err.println(helpMessage);
+            return null;
+        }
+
+        HashMap<String, String> argumentMap = new HashMap<>();
+
+        int i = 0;
+        while(i < args.length) {
+            // key is followed by value. Key starts with -
+            if(!args[i].startsWith("-")) {
+                /* found parameter that does not start with '-'
+                maybe shell parameters. Leave it alone. We are done here
+                */
+                return argumentMap;
+            }
+
+            // value can be empty
+            if(args.length > i+1 && !args[i+1].startsWith("-")) {
+                // it is a value
+                argumentMap.put(args[i], args[i+1]);
+                i += 2;
+            } else {
+                // no value - next parameter
+                argumentMap.put(args[i], null);
+                i += 1;
+            }
+        }
+
+        return argumentMap;
+    }
+
+
+}

test/net/sharksystem/CommandlineTests.java

@@ -0,0 +1,26 @@
+package net.sharksystem;
+
+import net.sharksystem.utils.Commandline;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.HashMap;
+
+public class CommandlineTests {
+    @Test
+    public void test1() {
+        String key0 = "-help";
+        String key1 = "-o";
+        String value1 = "xyz";
+        String[] args = new String[] {key0, key1, value1};
+        HashMap<String, String> argsMap = Commandline.parametersToMap(args, false, "helpmessage");
+
+        Assert.assertEquals(2, argsMap.size());
+
+        // 0
+        Assert.assertNull(argsMap.get(key0));
+        // 1
+        String valueInMap = argsMap.get(key1);
+        Assert.assertTrue(valueInMap.equalsIgnoreCase(value1));
+    }
+}

test/net/sharksystem/V1TestSuite.java

@@ -22,7 +22,8 @@
         LongerMessages.class,
         CryptoUsage.class,
         HelperTester.class,
-        MultihopTests.class
+        MultihopTests.class,
+        CommandlineTests.class
         //E2EStreamPairLinkTestVersion2.class TODO
 })
 public class V1TestSuite {