ThrowableUtil Class — netty Architecture

Source Code

common/src/main/java/io/netty/util/internal/ThrowableUtil.java lines 23–83

public final class ThrowableUtil {

    private ThrowableUtil() { }

    /**
     * Set the {@link StackTraceElement} for the given {@link Throwable}, using the {@link Class} and method name.
     */
    public static <T extends Throwable> T unknownStackTrace(T cause, Class<?> clazz, String method) {
        cause.setStackTrace(new StackTraceElement[] { new StackTraceElement(clazz.getName(), method, null, -1)});
        return cause;
    }

    /**
     * Gets the stack trace from a Throwable as a String.
     *
     * @param cause the {@link Throwable} to be examined
     * @return the stack trace as generated by {@link Throwable#printStackTrace(java.io.PrintWriter)} method.
     */
    @Deprecated
    public static String stackTraceToString(Throwable cause) {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        PrintStream pout = new PrintStream(out);
        cause.printStackTrace(pout);
        pout.flush();
        try {
            return out.toString();
        } finally {
            try {
                out.close();
            } catch (IOException ignore) {
                // ignore as should never happen
            }
        }
    }

    @Deprecated
    public static boolean haveSuppressed() {
        return true;
    }

    public static void addSuppressed(Throwable target, Throwable suppressed) {
        if (suppressed != null) {
            target.addSuppressed(suppressed);
        }
    }

    public static void addSuppressedAndClear(Throwable target, List<Throwable> suppressed) {
        addSuppressed(target, suppressed);
        suppressed.clear();
    }

    public static void addSuppressed(Throwable target, List<Throwable> suppressed) {
        for (Throwable t : suppressed) {
            addSuppressed(target, t);
        }
    }

    public static Throwable[] getSuppressed(Throwable source) {
        return source.getSuppressed();
    }
}