@Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (!(obj instanceof FileStarted)) {
            return false;
        }
        FileStarted other = (FileStarted) obj;
        if (resourceId == null) {
            if (other.resourceId != null) {
                return false;
            }
        } else if (!resourceId.equals(other.resourceId)) {
            return false;
        }
        return started == other.started;
    }
@return elapsed milliseconds this the start of processing of this
file resource
tika-batch/src/main/java/org/apache/tika/batch/FileStarted.java