used Tuple0 as a better type parameter for the function on Tuple/StringTemplate

runtime/src/jet/StringTemplate.java

@@ -20,10 +20,10 @@ package jet;
  *
  * It is represented as an object that contains a Tuple
  */
-public class StringTemplate<T extends Tuple> {
+public class StringTemplate {
-    private final T tuple;
+    private final Tuple tuple;
 
-    public StringTemplate(T tuple) {
+    public StringTemplate(Tuple tuple) {
         this.tuple = tuple;
     }
 
@@ -50,11 +50,11 @@ public class StringTemplate<T extends Tuple> {
     @Override
     public String toString() {
         final StringBuilder builder = new StringBuilder();
-        tuple.forEach(new Function1<Object,Void>(){
+        tuple.forEach(new Function1<Object,Tuple0>(){
             @Override
-            public Void invoke(Object o) {
+            public Tuple0 invoke(Object o) {
                 builder.append(o);
-                return null;
+                return Tuple0.INSTANCE;
             }
         });
         return builder.toString();
@@ -62,9 +62,20 @@ public class StringTemplate<T extends Tuple> {
     }
 
     /**
-     * Returns the values in the string template
+     * Returns the tuple of values in the string template
      */
-    public T getValues() {
+    public Tuple getValues() {
         return tuple;
     }
+
+
+    /**
+     * Performs the given function on each value in the string template
+     */
+    public void forEach(Function1<Object, Tuple0> fn) {
+        if (tuple != null) {
+            tuple.forEach(fn);
+        }
+    }
+
 }

runtime/src/jet/Tuple.java

@@ -23,7 +23,7 @@ public abstract class Tuple extends DefaultJetObject {
     /**
      * Performs the given function on each item in the tuple
      */
-    public abstract void forEach(Function1<Object, Void> fn);
+    public abstract void forEach(Function1<Object, Tuple0> fn);
 
     /**
      * Returns the size of the tuple

runtime/src/jet/Tuple0.java

@@ -41,7 +41,7 @@ public class Tuple0 extends Tuple {
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
     }
 
     @Override

runtime/src/jet/Tuple1.java

@@ -46,7 +46,7 @@ public class Tuple1<T1> extends Tuple {
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
     }
 

runtime/src/jet/Tuple10.java

@@ -109,7 +109,7 @@ public class Tuple10<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> extends Tuple {
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple11.java

@@ -116,7 +116,7 @@ public class Tuple11<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> extends Tuple
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple12.java

@@ -123,7 +123,7 @@ public class Tuple12<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> extends
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple13.java

@@ -130,7 +130,7 @@ public class Tuple13<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13> ext
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple14.java

@@ -137,7 +137,7 @@ public class Tuple14<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple15.java

@@ -144,7 +144,7 @@ public class Tuple15<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple16.java

@@ -151,7 +151,7 @@ public class Tuple16<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple17.java

@@ -158,7 +158,7 @@ public class Tuple17<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple18.java

@@ -165,7 +165,7 @@ public class Tuple18<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple19.java

@@ -172,7 +172,7 @@ public class Tuple19<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple2.java

@@ -53,7 +53,7 @@ public class Tuple2<T1, T2> extends Tuple {
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
     }

runtime/src/jet/Tuple20.java

@@ -179,7 +179,7 @@ public class Tuple20<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple21.java

@@ -186,7 +186,7 @@ public class Tuple21<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple22.java

@@ -193,7 +193,7 @@ public class Tuple22<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple3.java

@@ -60,7 +60,7 @@ public class Tuple3<T1, T2, T3> extends Tuple {
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple4.java

@@ -67,7 +67,7 @@ public class Tuple4<T1, T2, T3, T4> extends Tuple {
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple5.java

@@ -74,7 +74,7 @@ public class Tuple5<T1, T2, T3, T4, T5> extends Tuple {
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple6.java

@@ -81,7 +81,7 @@ public class Tuple6<T1, T2, T3, T4, T5, T6> extends Tuple {
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple7.java

@@ -88,7 +88,7 @@ public class Tuple7<T1, T2, T3, T4, T5, T6, T7> extends Tuple {
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple8.java

@@ -95,7 +95,7 @@ public class Tuple8<T1, T2, T3, T4, T5, T6, T7, T8> extends Tuple {
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);

runtime/src/jet/Tuple9.java

@@ -102,7 +102,7 @@ public class Tuple9<T1, T2, T3, T4, T5, T6, T7, T8, T9> extends Tuple {
     }
 
     @Override
-    public void forEach(Function1<Object, Void> fn) {
+    public void forEach(Function1<Object, Tuple0> fn) {
         fn.invoke(_1);
         fn.invoke(_2);
         fn.invoke(_3);