public static String getMessage()

in nifi-extension-bundles/nifi-groovyx-bundle/nifi-groovyx-processors/src/main/java/org/apache/nifi/processors/groovyx/util/Throwables.java [53:151]
84 lines of code
39 McCabe index (conditional complexity)

    public static String getMessage(Throwable e, Object priority, int maxlen) {

        if (e == null) {
            return null;
        }
        e = getRootException(e);

        StackTraceElement[] trace = e.getStackTrace();
        int traceIndex = -1;

        if (priority != null) {
            if (priority instanceof String) {
                for (int i = 0; i < trace.length; i++) {
                    if (trace[i].getClassName().startsWith((String) priority)) {
                        traceIndex = i;
                        break;
                    }
                }
            } else {
                if (!(priority instanceof Class)) {
                    priority = priority.getClass();
                }

                String cl = ((Class) priority).getName();
                for (int i = 0; i < trace.length; i++) {
                    if (trace[i].getClassName().startsWith(cl)) {
                        traceIndex = i;
                        break;
                    }
                }
                if (traceIndex == -1) {
                    cl = ((Class) priority).getPackage().getName();
                    for (int i = 0; i < trace.length; i++) {
                        if (trace[i].getClassName().startsWith(cl)) {
                            traceIndex = i;
                            break;
                        }
                    }
                }
            }
        }

        if (traceIndex == -1) {
            for (int i = 0; i < trace.length; i++) {
                String cl = trace[i].getClassName();
                if (cl.startsWith("java.") || cl.startsWith("javax.") || cl.startsWith("org.omg.") || cl.startsWith("org.w3c.") || cl.startsWith("org.xml.") || cl.startsWith("groovy.lang.") || cl
                        .startsWith("groovy.util.") || cl.startsWith("org.codehaus.") || cl.startsWith("com.springsource.") || cl.startsWith("org.springframework.") || cl.startsWith("org.apache.")
                        || cl.startsWith("sun.") || cl.startsWith("com.sun.") || cl.startsWith("org.junit.") || cl.startsWith("junit.framework.")

                        ) {
                    //skip standard classes
                } else {
                    traceIndex = i;
                    break;
                }
            }
        }

        if (traceIndex == -1) {
            traceIndex = 0;
        }

        //build message text
        String msg = e.getMessage();
        if (msg == null) {
            msg = "";
        }
        msg = msg.trim();
        //append dot at the end if no others
        if (msg.length() > 0 && ".!:,;?".indexOf(msg.substring(msg.length() - 1)) == -1) {
            msg += ".";
        }

        //exception class name without package
        String msgSuffix = " " + e.getClass().getName().replaceAll("^.*\\.(\\w+)$", "$1") + " at ";
        //append callers line
        if (traceIndex < 0 || traceIndex >= trace.length) {
            System.err.println("Error formatting exception: " + e);
            e.printStackTrace(System.err);
            msgSuffix = e.getClass().getName();
        } else {
            msgSuffix += trace[traceIndex].toString();
        }
        if (maxlen > 0 && msgSuffix.length() + msg.length() > maxlen) {
            if (maxlen > msgSuffix.length() + 2) {
                int newlen = maxlen - msgSuffix.length() - 2;
                if (newlen < msg.length()) {
                    msg = msg.substring(0, newlen);
                }
                msg = msg + ".." + msgSuffix;
            } else if (msg.length() > maxlen) {
                msg = msg.substring(0, maxlen);
            }
        } else {
            msg = msg + msgSuffix;
        }

        return msg;
    }