complex aspect!

diff --git a/tests/java5/generics/genericaspects/GenericAspectV.aj b/tests/java5/generics/genericaspects/GenericAspectV.aj
new file mode 100644 (file)
index 0000000..74585d7
--- /dev/null
+++ b/tests/java5/generics/genericaspects/GenericAspectV.aj
@@ -0,0 +1,160 @@
+import java.util.*;
+import java.lang.reflect.*;
+import org.aspectj.lang.annotation.*;
+
+// ABRACADABRA
+
+abstract aspect ParentChildRelationship<Parent,Child> {
+
+  // The interfaces
+  interface ParentHasChildren<C extends ChildHasParent>{
+    List<C> getChildren();
+    void addChild(C child);
+    void removeChild(C child);
+  }
+
+  interface ChildHasParent<P extends ParentHasChildren>{
+    P getParent();
+    void setParent(P parent);
+  }
+
+
+  // Put the interfaces on the relevant people
+  declare parents: Parent implements ParentHasChildren<Child>;
+  declare parents: Child  implements ChildHasParent<Parent>; 
+
+  public E ChildHasParent<E>.getParent() {
+    return parent;
+  }
+
+  public List<A> ParentHasChildren<A>.children = new ArrayList<A>();
+  public       B ChildHasParent<B>.parent;
+
+  public List<D> ParentHasChildren<D>.getChildren() {
+    return Collections.unmodifiableList(children);  
+  }
+
+  public void ChildHasParent<F>.setParent(F parent) {
+    this.parent = parent;
+  }
+
+  public void ParentHasChildren<G>.addChild(G child) {
+    if (child.getParent() != null) {
+      child.getParent().removeChild(child);
+    }
+    children.add(child);
+  }
+
+  public void ParentHasChildren<H>.removeChild(H child) {
+    if (children.remove(child)) {
+      child.setParent(null);
+    }
+  }
+
+}
+
+aspect GenericAspectV extends ParentChildRelationship<Top,Bottom> { 
+
+  public static void main(String []argv) {
+
+    // Check the state of top
+    Top t = new Top();
+    check(t instanceof ParentHasChildren,"Top should implement ParentHasChildren");
+    Type[] intfs = Top.class.getGenericInterfaces();
+    check(intfs[0] instanceof ParameterizedType,
+          "Expected Top to have parameterized interface but found "+intfs[0]);
+    ParameterizedType pt = (ParameterizedType) intfs[0];
+    Type[] tArgs = pt.getActualTypeArguments();
+    check(tArgs[0]==Bottom.class,
+          "Expecting Bottom parameter but found " + tArgs[0]);
+
+
+    // Check the state of top
+    Bottom b = new Bottom();
+    check(b instanceof ChildHasParent,"Bottom should implement ChildHasParent");
+    intfs = Bottom.class.getGenericInterfaces();
+    check(intfs[0] instanceof ParameterizedType,
+          "Expected Bottom to have parameterized interface but found "+intfs[0]);
+    pt = (ParameterizedType) intfs[0];
+    tArgs = pt.getActualTypeArguments();
+    check(tArgs[0]==Top.class,
+          "Expecting Top parameter but found " + tArgs[0]);
+
+
+
+
+    // Field fiddling
+    b.parent = t;
+    List<Bottom> kids = new ArrayList<Bottom>();
+    kids.add(b);
+    t.children = kids;
+
+
+    // start using the methods
+    List<Bottom> kids2 = t.getChildren();
+    check(kids2.size()==1,
+      "Expected one child of the Top but found "+kids2.size());
+    check(kids2.get(0).equals(b),
+      "Expected one child of the Top which was what we put in there!"+kids2.get(0));
+
+    // and the parent methods
+    Top retrievedParent = b.getParent();
+    check(retrievedParent==t,
+      "parent check 1 failed "+
+      "retrieved="+retrievedParent+"  expected="+t);
+
+
+    Top top2 = new Top();
+    b.setParent(top2);
+    Top retrievedParent2 = b.getParent();
+    check(retrievedParent2==top2,
+      "parent check 2 failed "+
+      "retrieved="+retrievedParent2+"  expected="+top2);
+    
+    Top top3 = new Top();
+    Bottom bot2 = new Bottom();
+    top3.addChild(bot2);
+    Bottom aBottom = top3.getChildren().get(0);
+    check(aBottom==bot2,"Incorrect child? expected="+bot2+" found="+aBottom);
+    top3.removeChild(bot2);
+    int size=top3.getChildren().size();
+    check(size==0,"Should be no children but there were "+size);
+
+
+  }
+
+  public static void check(boolean b,String msg) {
+    if (!b) throw new RuntimeException(msg);
+  }
+}
+
+class Top {}
+class Bottom {}
+
+//////////////////////////////////////////////////////////////////
+
+/* End game for test Z, as bits work they are promoted up into the 
+   testcase above :)
+
+   TestN promoted the declare parents statements up
+   TestO promoted the fields up - a parent knows its children, a 
+         child knows its parents - but then used them incorrectly
+   TestP uses the fields correctly
+   TestQ ... tests some stumbling blocks I encountered before R...
+   TestR promoted getChildren() method
+   TestS promoted getParent() and setParent()
+   TestT ... tests some stumbling blocks I encountered before U...
+   TestU promoted addChild and removeChild
+
+public abstract aspect ParentChildRelationship<Parent,Child> {
+
+    @SuppressAjWarnings
+    public pointcut addingChild(Parent p, Child c) :
+      execution(* Parent.addChild(Child)) && this(p) && args(c);
+      
+    @SuppressAjWarnings
+    public pointcut removingChild(Parent p, Child c) :
+      execution(* Parent.removeChild(Child)) && this(p) && args(c);
+}
+*/
+