[cweb-CVS] junit-ext/src/java/junit/framework TestCase2.java, 1.24, 1.25

[Bryan T. <tho...@us...>]

Update of /cvsroot/cweb/junit-ext/src/java/junit/framework
In directory sc8-pr-cvs4.sourceforge.net:/tmp/cvs-serv5364/src/java/junit/framework

Modified Files:
	TestCase2.java 
Log Message:
Added getInnerCause and isInnerCause.

Index: TestCase2.java
===================================================================
RCS file: /cvsroot/cweb/junit-ext/src/java/junit/framework/TestCase2.java,v
retrieving revision 1.24
retrieving revision 1.25
diff -C2 -d -r1.24 -r1.25
*** TestCase2.java	10 Sep 2007 11:09:13 -0000	1.24
--- TestCase2.java	18 Oct 2007 16:53:59 -0000	1.25
***************
*** 2254,2258 ****
  //     * Place. This specifies how big an error we are willing to accept
  //     * in terms of the value of the least significant digit of the
! //     * floating point number's representation.  <i>maxUlps</i> can
  //     * also be interpreted in terms of how many representable floats
  //     * we are willing to accept between A and B.  This function will
--- 2254,2258 ----
  //     * Place. This specifies how big an error we are willing to accept
  //     * in terms of the value of the least significant digit of the
! //     * floating point number’s representation.  <i>maxUlps</i> can
  //     * also be interpreted in terms of how many representable floats
  //     * we are willing to accept between A and B.  This function will
***************
*** 2329,2333 ****
  //     * Place. This specifies how big an error we are willing to accept
  //     * in terms of the value of the least significant digit of the
! //     * floating point number's representation.  <i>maxUlps</i> can
  //     * also be interpreted in terms of how many representable doubles
  //     * we are willing to accept between A and B.  This function will
--- 2329,2333 ----
  //     * Place. This specifies how big an error we are willing to accept
  //     * in terms of the value of the least significant digit of the
! //     * floating point number’s representation.  <i>maxUlps</i> can
  //     * also be interpreted in terms of how many representable doubles
  //     * we are willing to accept between A and B.  This function will
***************
*** 2590,2592 ****
--- 2590,2657 ----
      }
  
+     /**
+      * Examines a stack trace for an instance of the specified cause nested to
+      * any level within that stack trace.
+      * 
+      * @param t
+      *            The stack trace.
+      * @param cls
+      *            The class of exception that you are looking for in the stack
+      *            trace.
+      *            
+      * @return An exception that is an instance of that class iff one exists in
+      *         the stack trace and <code>null</code> otherwise.
+      *         
+      * @throws IllegalArgumentException
+      *             if any parameter is null.
+      */
+     static public Throwable getInnerCause(Throwable t, Class<? extends Throwable> cls) {
+         
+         if (t == null)
+             throw new IllegalArgumentException();
+ 
+         if (cls == null)
+             throw new IllegalArgumentException();
+         
+         {
+             Class x = t.getClass();
+             while(x != null){
+                 if( x == cls) 
+                     return t;
+                 x = x.getSuperclass();
+             }
+             
+         }
+          
+         t = t.getCause();
+ 
+         if (t == null)
+             return null;
+ 
+         return getInnerCause(t, cls);
+ 
+     }
+ 
+     /**
+      * Examines a stack trace for an instance of the specified cause nested to
+      * any level within that stack trace.
+      * 
+      * @param t
+      *            The stack trace.
+      * @param cls
+      *            The class of exception that you are looking for in the stack
+      *            trace.
+      * 
+      * @return <code>true</code> iff an exception that is an instance of that
+      *         class iff one exists in the stack trace.
+      * 
+      * @throws IllegalArgumentException
+      *             if any parameter is null.
+      */
+     static public boolean isInnerCause(Throwable t, Class<? extends Throwable>cls) {
+         
+         return getInnerCause(t, cls) != null;
+         
+     }
+     
  }