Momento Design Pattern

Author: rohitksingh

src/MomenoDesignPattern/SaveState.java

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+package MomenoDesignPattern;
+
+public class SaveState {
+
+Object savedState;
+
+public void save(SomeIndependentClass sic)
+{
+savedState = sic;
+}
+
+public Object restore()
+{
+return savedState;
+}
+
+
+}

src/MomenoDesignPattern/SomeIndependentClass.java

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+package MomenoDesignPattern;
+
+public class SomeIndependentClass {
+
+int counter;
+private SaveState saveState;
+
+public SomeIndependentClass(SaveState saveState)
+{
+this.saveState = saveState;
+}
+
+public void run()
+{
+for(int i=0;i<10;i++)
+{
+counter++;
+saveState.save(this);
+}
+}
+
+public int getCounterValue()
+{
+return counter;
+}
+
+}

src/MomenoDesignPattern/Test.java

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+package MomenoDesignPattern;
+
+public class Test {
+
+public static void main(String[] args)
+{
+SaveState state = new SaveState();
+
+SomeIndependentClass sic = new SomeIndependentClass(state);
+sic.run();
+sic.run();
+sic.run();
+
+SomeIndependentClass s1 = (SomeIndependentClass)state.restore();
+System.out.println(s1.getCounterValue());
+}
+
+}