Clean up CloneNotSupportedException handling in Cloneables.

Wrap it in an AssertionError.
I looked to Java sources to see what the best practice was:
Sometimes it's ignored, sometimes an InternalError is thrown,
sometimes an AssertionError without the "cause", but sometimes
this pattern, which is clearly the best of those.


git-svn-id: https://samskivert.googlecode.com/svn/trunk@2660 6335cc39-0255-0410-8fd6-9bcaacd3b74c

src/java/com/samskivert/jdbc/jora/FieldMask.java

@@ -144,7 +144,7 @@ public class FieldMask
             mask._modified = new boolean[_modified.length];
             return mask;
         } catch (CloneNotSupportedException cnse) {
-            throw new RuntimeException("Oh god, the clones!");
+            throw new AssertionError(cnse); // won't happen; we're Cloneable
         }
     }
 

src/java/com/samskivert/util/ArrayIntSet.java

@@ -332,7 +332,7 @@ public class ArrayIntSet extends AbstractIntSet
             return nset;
 
         } catch (CloneNotSupportedException cnse) {
-            throw new RuntimeException("Internal clone error.");
+            throw new AssertionError(cnse); // won't happen; we're Cloneable
         }
     }
 

src/java/com/samskivert/util/BaseArrayList.java

@@ -28,8 +28,6 @@ import java.util.RandomAccess;
 
 import java.lang.reflect.Array;
 
-import static com.samskivert.Log.log;
-
 /**
  * Provides a base for extending the standard Java {@link ArrayList}
  * functionality (which we'd just extend directly if those pig fuckers hadn't
@@ -177,8 +175,7 @@ public abstract class BaseArrayList<E> extends AbstractList<E>
             return dup;
 
         } catch (CloneNotSupportedException cnse) {
-            log.warning("clone failed", cnse); // won't happen.
-            return null;
+            throw new AssertionError(cnse); // won't happen; we are Cloneable
         }
     }
 

src/java/com/samskivert/util/HashIntMap.java

@@ -471,7 +471,7 @@ public class HashIntMap<V> extends AbstractMap<Integer,V>
             return result;
 
         } catch (CloneNotSupportedException cnse) {
-            throw new RuntimeException(cnse); // won't happen
+            throw new AssertionError(cnse); // won't happen; we're Cloneable
         }
     }
 
@@ -599,7 +599,7 @@ public class HashIntMap<V> extends AbstractMap<Integer,V>
                 return result;
 
             } catch (CloneNotSupportedException cnse) {
-                throw new RuntimeException(cnse); // won't happen
+                throw new AssertionError(cnse); // won't happen; we are Cloneable.
             }
         }
     }