Fix director typemaps for pointers so that NULL pointers are correctly marshalled to C#/Java null in director methods

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@10662 626c5289-ae23-0410-ae9c-e8d60b6d4f22

CHANGES.current

@@ -1,6 +1,10 @@
 Version 1.3.37 (in progress)
 =============================
 
+2008-07-14: wsfultonn
+            [Java, C#] Fix director typemaps for pointers so that NULL pointers are correctly 
+            marshalled to C#/Java null in director methods.
+
 2008-07-04: olly
 	    [PHP] For std_vector.i and std_map.i, rename empty() to is_empty()
 	    since "empty" is a PHP reserved word.  Based of patch from Mark Klein

Examples/test-suite/csharp/director_basic_runme.cs

@@ -0,0 +1,74 @@
+using System;
+
+namespace director_basicNamespace {
+
+public class runme
+{
+  static void Main() 
+  {
+    runme r = new runme();
+    r.run();
+  }
+
+  void run()
+  {
+    director_basic_MyFoo a = new director_basic_MyFoo();
+
+    if (a.ping() != "director_basic_MyFoo::ping()") {
+      throw new Exception ( "a.ping()" );
+    }
+
+    if (a.pong() != "Foo::pong();director_basic_MyFoo::ping()") {
+      throw new Exception ( "a.pong()" );
+    }
+
+    Foo b = new Foo();
+
+    if (b.ping() != "Foo::ping()") {
+      throw new Exception ( "b.ping()" );
+    }
+
+    if (b.pong() != "Foo::pong();Foo::ping()") {
+      throw new Exception ( "b.pong()" );
+    }
+
+    A1 a1 = new A1(1, false);
+    a1.Dispose();
+
+    {
+      MyOverriddenClass my = new MyOverriddenClass();
+
+      my.expectNull = true;
+      if (MyClass.call_pmethod(my, null) != null)
+        throw new Exception("null pointer marshalling problem");
+
+      Bar myBar = new Bar();
+      my.expectNull = false;
+      Bar myNewBar = MyClass.call_pmethod(my, myBar);
+      if (myNewBar == null)
+        throw new Exception("non-null pointer marshalling problem");
+      myNewBar.x = 10;
+    }
+  }
+}
+
+class director_basic_MyFoo : Foo {
+  public director_basic_MyFoo() : base() {
+  }
+
+  public override string ping() {
+    return "director_basic_MyFoo::ping()";
+  }
+}
+
+class MyOverriddenClass : MyClass {
+  public bool expectNull = false;
+  public bool nonNullReceived = false;
+  public override Bar pmethod(Bar b) {
+    if ( expectNull && (b != null) )
+      throw new Exception("null not received as expected");
+    return b;
+  }
+}
+
+}

Examples/test-suite/director_basic.i

@@ -112,12 +112,14 @@ public:
     return vmethod(b);
   }  
 
-
   static MyClass *get_self(MyClass *c) 
   {
     return c;
   }
-  
+
+  static Bar * call_pmethod(MyClass *myclass, Bar *b) {
+    return myclass->pmethod(b);
+  }
 };
 
 template<class T>

Examples/test-suite/java/director_basic_runme.java

@@ -14,28 +14,43 @@ public class director_basic_runme {
 
   public static void main(String argv[]) {
 
-      director_basic_MyFoo a = new director_basic_MyFoo();
+    director_basic_MyFoo a = new director_basic_MyFoo();
 
-      if (!a.ping().equals("director_basic_MyFoo::ping()")) {
-          throw new RuntimeException ( "a.ping()" );
-      }
+    if (!a.ping().equals("director_basic_MyFoo::ping()")) {
+      throw new RuntimeException ( "a.ping()" );
+    }
 
-      if (!a.pong().equals("Foo::pong();director_basic_MyFoo::ping()")) {
-          throw new RuntimeException ( "a.pong()" );
-      }
+    if (!a.pong().equals("Foo::pong();director_basic_MyFoo::ping()")) {
+      throw new RuntimeException ( "a.pong()" );
+    }
 
-      Foo b = new Foo();
+    Foo b = new Foo();
 
-      if (!b.ping().equals("Foo::ping()")) {
-          throw new RuntimeException ( "b.ping()" );
-      }
+    if (!b.ping().equals("Foo::ping()")) {
+      throw new RuntimeException ( "b.ping()" );
+    }
 
-      if (!b.pong().equals("Foo::pong();Foo::ping()")) {
-          throw new RuntimeException ( "b.pong()" );
-      }
+    if (!b.pong().equals("Foo::pong();Foo::ping()")) {
+      throw new RuntimeException ( "b.pong()" );
+    }
 
-      A1 a1 = new A1(1, false);
-      a1.delete();
+    A1 a1 = new A1(1, false);
+    a1.delete();
+
+    {
+      MyOverriddenClass my = new MyOverriddenClass();
+
+      my.expectNull = true;
+      if (MyClass.call_pmethod(my, null) != null)
+        throw new RuntimeException("null pointer marshalling problem");
+
+      Bar myBar = new Bar();
+      my.expectNull = false;
+      Bar myNewBar = MyClass.call_pmethod(my, myBar);
+      if (myNewBar == null)
+        throw new RuntimeException("non-null pointer marshalling problem");
+      myNewBar.setX(10);
+    }
   }
 }
 
@@ -45,3 +60,13 @@ class director_basic_MyFoo extends Foo {
     }
 }
 
+class MyOverriddenClass extends MyClass {
+  public boolean expectNull = false;
+  public boolean nonNullReceived = false;
+  public Bar pmethod(Bar b) {
+    if ( expectNull && (b != null) )
+      throw new RuntimeException("null not received as expected");
+    return b;
+  }
+}
+

Lib/csharp/csharp.swg

@@ -428,7 +428,8 @@ SWIGINTERN const char * SWIG_UnpackData(const char *c, void *ptr, size_t sz) {
 %typemap(directorin) SWIGTYPE &
 %{ $input = ($1_ltype) &$1; %}
 
-%typemap(csdirectorin) SWIGTYPE *, SWIGTYPE (CLASS::*), SWIGTYPE & "new $csclassname($iminput, false)"
+%typemap(csdirectorin) SWIGTYPE *, SWIGTYPE (CLASS::*) "($iminput == IntPtr.Zero) ? null : new $csclassname($iminput, false)"
+%typemap(csdirectorin) SWIGTYPE & "new $csclassname($iminput, false)"
 %typemap(csdirectorout) SWIGTYPE *, SWIGTYPE (CLASS::*), SWIGTYPE & "$csclassname.getCPtr($cscall).Handle"
 
 /* Default array handling */

Lib/java/java.swg

@@ -620,7 +620,8 @@
 %typemap(directorin,descriptor="L$packagepath/$javaclassname;") SWIGTYPE &
 %{ *($&1_ltype)&$input = ($1_ltype) &$1; %}
 
-%typemap(javadirectorin) SWIGTYPE *, SWIGTYPE (CLASS::*), SWIGTYPE & "new $javaclassname($jniinput, false)"
+%typemap(javadirectorin) SWIGTYPE *, SWIGTYPE (CLASS::*) "($jniinput == 0) ? null : new $javaclassname($jniinput, false)"
+%typemap(javadirectorin) SWIGTYPE & "new $javaclassname($jniinput, false)"
 %typemap(javadirectorout) SWIGTYPE *, SWIGTYPE (CLASS::*), SWIGTYPE & "$javaclassname.getCPtr($javacall)"
 
 /* Default array handling */