Sample implementation of an interactive modification

Author: j-fliegenschmidt

src/main/java/de/rub/nds/modifiablevariable/biginteger/BigIntegerInteractiveModification.java

@@ -0,0 +1,49 @@
+/**
+ * ModifiableVariable - A Variable Concept for Runtime Modifications
+ *
+ * Copyright 2014-2017 Ruhr University Bochum / Hackmanit GmbH
+ *
+ * Licensed under Apache License 2.0
+ * http://www.apache.org/licenses/LICENSE-2.0
+ */
+package de.rub.nds.modifiablevariable.biginteger;
+
+import de.rub.nds.modifiablevariable.VariableModification;
+import java.math.BigInteger;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+/**
+ * @author Janis Fliegenschmidt - janis.fliegenschmidt@rub.de
+ */
+@XmlRootElement
+@XmlType(propOrder = {"interactive", "modificationFilter", "postModification"})
+public class BigIntegerInteractiveModification extends VariableModification<BigInteger> {
+
+    private InteractiveBigIntegerModification modification;
+
+    public BigIntegerInteractiveModification() {
+        this(new InteractiveBigIntegerModification() {
+            @Override
+            public BigInteger modify(BigInteger oldVal) {
+                // Fail fast
+                throw new UnsupportedOperationException("No interactive modifi"
+                        + "cation specified.");
+            }
+        });
+    }
+
+    protected BigIntegerInteractiveModification(InteractiveBigIntegerModification modification) {
+        this.modification = modification;
+    }
+
+    @Override
+    protected BigInteger modifyImplementationHook(final BigInteger input) {
+        return this.modification.modify(input);
+    }
+
+    public interface InteractiveBigIntegerModification {
+
+        BigInteger modify(BigInteger oldVal);
+    }
+}

src/main/java/de/rub/nds/modifiablevariable/biginteger/BigIntegerModificationFactory.java

@@ -88,6 +88,24 @@ public static VariableModification<BigInteger> explicitValueFromFile(int value)
         return modifications.get(pos);
     }
 
+    public static VariableModification<BigInteger> interactive() {
+        return new BigIntegerInteractiveModification(
+                new BigIntegerInteractiveModification.InteractiveBigIntegerModification() {
+            @Override
+            public BigInteger modify(BigInteger oldVal) {
+                BigInteger result = null;
+                
+                System.out.println("Enter new value for BigInt (Old value is " 
+                        + oldVal.toString() + "): ");
+                String input = System.console().readLine().trim();
+                
+                result = new BigInteger(input);
+                
+                return result;
+            }
+        });
+    }
+
     public static synchronized List<VariableModification<BigInteger>> modificationsFromFile() {
         try {
             if (modificationsFromFile == null) {