StateGof commit

src/main/java/org/mfusco/fromgoftolambda/examples/state/StateGof.java

@@ -0,0 +1,75 @@
+package org.mfusco.fromgoftolambda.examples.state;
+
+interface Statelike {
+    void writeName(StateContext context, String name);  
+}
+
+class StateLowerCase implements Statelike {
+
+    @Override
+    public void writeName(final StateContext context, final String name) {
+        System.out.println(name.toLowerCase());
+        context.setState(new StateMultipleUpperCase());
+    }
+
+}
+
+class StateMultipleUpperCase implements Statelike {
+    /** Counter local to this state */
+    private int count = 0;
+
+    @Override
+    public void writeName(final StateContext context, final String name) {
+        System.out.println(name.toUpperCase());
+        /* Change state after StateMultipleUpperCase's writeName() gets invoked twice */
+        if(++count > 1) {
+            context.setState(new StateLowerCase());
+        }
+    }
+
+}
+
+class StateContext {
+    private Statelike myState;
+    StateContext() {
+        setState(new StateLowerCase());
+    }
+
+    /**
+     * Setter method for the state.
+     * Normally only called by classes implementing the State interface.
+     * @param newState the new state of this context
+     */
+    void setState(final Statelike newState) {
+        myState = newState;
+    }
+
+    public void writeName(final String name) {
+        myState.writeName(this, name);
+    }
+}
+
+
+public class StateGof {
+
+    public static void main(String[] args) {
+        final StateContext sc = new StateContext();
+
+        sc.writeName("january");
+        sc.writeName("february");
+        sc.writeName("march");
+        sc.writeName("april");
+        sc.writeName("may");
+        sc.writeName("june");
+        sc.writeName("july");
+        sc.writeName("august");
+        sc.writeName("september");
+        sc.writeName("october");
+        sc.writeName("november");
+        sc.writeName("december");
+
+    }
+}
+
+
+

src/main/java/org/mfusco/fromgoftolambda/examples/state/StateLambda.java

@@ -0,0 +1,30 @@
+package org.mfusco.fromgoftolambda.examples.state;
+
+import java.util.function.Supplier;
+
+public class StateLambda {
+
+	final static StateContext sc = new StateContext();
+	static void display(Supplier<String> arg) {
+		sc.writeName(arg.get());
+	}
+
+	public static void main(String[] args) {
+
+		display(() -> "january");
+		display(() -> "february");
+		display(() -> "march");
+		display(() -> "april");
+
+		display(() -> "may");
+		display(() -> "june");
+		display(() -> "july");
+		display(() -> "august");
+
+		display(() -> "september");
+		display(() -> "october");
+		display(() -> "november");
+		display(() -> "december");
+	}
+
+}