1 files changed, 86 insertions, 10 deletions
diff --git a/src/java/com/jogamp/common/ExceptionUtils.java b/src/java/com/jogamp/common/ExceptionUtils.java
index c848a99..386f42b 100644
--- a/src/java/com/jogamp/common/ExceptionUtils.java
+++ b/src/java/com/jogamp/common/ExceptionUtils.java
@@ -58,21 +58,97 @@ public class ExceptionUtils {
     }
 
     /**
-     * Dumps a {@link Throwable} in a decorating message including the current thread name,
+     * Interface allowing {@link Throwable} specializations to provide their custom stack trace presentation.
+     * @since 2.3.2
+     */
+    public static interface CustomStackTrace {
+        /**
+         * Prints this {@link Throwable} as a cause to the output {@link PrintStream} {@code s},
+         * not iterating over all inner causes!
+         * @param s output stream
+         * @param causeStr the cause title
+         * @param causeIdx the cause index over all causes known by caller
+         * @param stackDepth the maximum depth for stack entries, or {@code -1} for all
+         * @since 2.3.2
+         */
+        void printCauseStack(final PrintStream s, final String causeStr, final int causeIdx, final int stackDepth);
+        /**
+         * Custom {@code printStackTrace} method, similar to {@link Throwable#printStackTrace(PrintStream, int, int)}.
+         * @param s output stream
+         * @param causeDepth the maximum depth for causes, or {@code -1} for all
+         * @param stackDepth the maximum depth for stack entries, or {@code -1} for all
+         */
+        void printStackTrace(final PrintStream s, final int causeDepth, final int stackDepth);
+    }
+
+    /**
+     * Prints the given {@link Throwable} cause to the output {@link PrintStream} {@code s}.
+     * @param s output stream
+     * @param causeStr the cause title
+     * @param cause the {@link Throwable} cause for output
+     * @param causeIdx the cause index over all causes known by caller
+     * @param causeDepth the maximum depth for causes, or {@code -1} for all
+     * @param stackDepth the maximum depth for stack entries, or {@code -1} for all
+     * @since 2.3.2
+     */
+    public static int printCause(final PrintStream s, final String causeStr, Throwable cause, final int causeIdx, final int causeDepth, final int stackDepth) {
+        int i=causeIdx;
+        for(; null != cause && ( -1 == causeDepth || i < causeDepth ); cause = cause.getCause()) {
+            if( cause instanceof CustomStackTrace ) {
+                ((CustomStackTrace)cause).printCauseStack(s, causeStr, i, stackDepth);
+            } else {
+                s.println(causeStr+"["+i+"] by "+cause.getClass().getSimpleName()+": "+cause.getMessage()+" on thread "+Thread.currentThread().getName());
+                dumpStack(s, cause.getStackTrace(), 0, stackDepth);
+            }
+            i++;
+        }
+        return i;
+    }
+
+    /**
+     * Prints the given {@link Throwable} to the output {@link PrintStream} {@code s}.
+     * @param s output stream
+     * @param t the {@link Throwable} for output
+     * @param causeDepth the maximum depth for causes, or {@code -1} for all
+     * @param stackDepth the maximum depth for stack entries, or {@code -1} for all
+     * @since 2.3.2
+     */
+    public static void printStackTrace(final PrintStream s, final Throwable t, final int causeDepth, final int stackDepth) {
+        if( t instanceof CustomStackTrace ) {
+            ((CustomStackTrace)t).printStackTrace(s, causeDepth, stackDepth);
+        } else {
+            s.println(t.getClass().getSimpleName()+": "+t.getMessage()+" on thread "+Thread.currentThread().getName());
+            dumpStack(s, t.getStackTrace(), 0, stackDepth);
+            printCause(s, "Caused", t.getCause(), 0, causeDepth, stackDepth);
+        }
+    }
+
+    /**
+     * Dumps a {@link Throwable} to {@link System.err} in a decorating message including the current thread name,
      * and its {@link #dumpStack(PrintStream, StackTraceElement[], int, int) stack trace}.
      * <p>
      * Implementation will iterate through all {@link Throwable#getCause() causes}.
      * </p>
+     * @param additionalDescr additional text placed before the {@link Throwable} details.
+     * @param t the {@link Throwable} for output
      */
     public static void dumpThrowable(final String additionalDescr, final Throwable t) {
-        System.err.println("Caught "+additionalDescr+" "+t.getClass().getSimpleName()+": "+t.getMessage()+" on thread "+Thread.currentThread().getName());
-        dumpStack(System.err, t.getStackTrace(), 0, -1);
-        int causeDepth = 1;
-        for( Throwable cause = t.getCause(); null != cause; cause = cause.getCause() ) {
-            System.err.println("Caused["+causeDepth+"] by "+cause.getClass().getSimpleName()+": "+cause.getMessage()+" on thread "+Thread.currentThread().getName());
-            dumpStack(System.err, cause.getStackTrace(), 0, -1);
-            causeDepth++;
-        }
+        dumpThrowable(additionalDescr, t, -1, -1);
+    }
+    /**
+     * Dumps a {@link Throwable} to {@link System.err} in a decorating message including the current thread name,
+     * and its {@link #dumpStack(PrintStream, StackTraceElement[], int, int) stack trace}.
+     * <p>
+     * Implementation will iterate through all {@link Throwable#getCause() causes}.
+     * </p>
+     * @param additionalDescr additional text placed before the {@link Throwable} details.
+     * @param t the {@link Throwable} for output
+     * @param causeDepth the maximum depth for causes, or {@code -1} for all
+     * @param stackDepth the maximum depth for stack entries, or {@code -1} for all
+     * @since 2.3.2
+     */
+    public static void dumpThrowable(final String additionalDescr, final Throwable t, final int causeDepth, final int stackDepth) {
+        System.err.print("Caught "+additionalDescr+" ");
+        printStackTrace(System.err, t, causeDepth, stackDepth);
     }
-
 }