add javaStackTrace() function

eclipse-archived · Jul 26, 2015 · 7f712c9 · 7f712c9
1 parent 8ccfb95
commit 7f712c9
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Showing 2 changed files with 34 additions and 10 deletions.
diff --git a/source/ceylon/interop/java/internal/Util.java b/source/ceylon/interop/java/internal/Util.java
@@ -29,20 +29,30 @@ public java.lang.String javaString(
     @SuppressWarnings("unchecked")
     public <T> java.lang.Class<T> 
     javaClass(@Ignore TypeDescriptor $reifiedT) {
-        if ($reifiedT instanceof TypeDescriptor.Class){
-            TypeDescriptor.Class klass = (TypeDescriptor.Class) $reifiedT;
+        if ($reifiedT instanceof TypeDescriptor.Class) {
+            TypeDescriptor.Class klass = 
+                    (TypeDescriptor.Class) $reifiedT;
             if (klass.getTypeArguments().length > 0)
                 throw new RuntimeException("given type has type arguments");
             return (java.lang.Class<T>) klass.getKlass();
         } 
-        else if($reifiedT instanceof TypeDescriptor.Member 
-                && ((TypeDescriptor.Member)$reifiedT).getMember() instanceof TypeDescriptor.Class) {
-            TypeDescriptor.Member.Class klass =  (TypeDescriptor.Class)((TypeDescriptor.Member)$reifiedT).getMember();
-            if (klass.getTypeArguments().length > 0)
-                throw new RuntimeException("given type has type arguments");
-            return (java.lang.Class<T>) klass.getKlass();
+        else if ($reifiedT instanceof TypeDescriptor.Member) {
+            TypeDescriptor.Member member = 
+                    (TypeDescriptor.Member) $reifiedT;
+            TypeDescriptor m = member.getMember();
+            if (m instanceof TypeDescriptor.Class) {
+                TypeDescriptor.Member.Class klass = 
+                        (TypeDescriptor.Class) m;
+                if (klass.getTypeArguments().length > 0)
+                    throw new RuntimeException("given type has type arguments");
+                return (java.lang.Class<T>) klass.getKlass();
+            }
         }
         throw new RuntimeException("unsupported type");
     }
-
+
+    public StackTraceElement[] javaStackTrace(Throwable t) {
+        return t.getStackTrace();
+    }
+
 }
diff --git a/source/ceylon/interop/java/misc.ceylon b/source/ceylon/interop/java/misc.ceylon
@@ -4,7 +4,8 @@ import ceylon.interop.java.internal {
 
 import java.lang {
     JavaString=String,
-    Class
+    Class,
+    StackTraceElement
 }
 
 "The [[java.lang::String]] underling the given Ceylon 
@@ -24,4 +25,17 @@ shared Class<out Type> javaClassFromInstance<Type>(Type instance)
         given Type satisfies Object
         => util.javaClassFromInstance(instance);
 
+"The stack trace information for the given [[Throwable]] as 
+ a sequence of Java [[StackTraceElement]]s, or the empty
+ sequence if no stack trace information is available. The 
+ first element of the sequence is the top of the stack, that 
+ is, the most deeply nested stack frame. This is usually the
+ stack frame in which the given `Throwable` was created
+ and thrown."
+shared StackTraceElement[] javaStackTrace(Throwable throwable) 
+        => [ for (stackElement in 
+                    util.javaStackTrace(throwable).iterable) 
+             if (exists stackElement) 
+                stackElement ];
+
 Util util = Util();