How to check long attachment name in mail handler?

[nihcet]

Hi,
There is 256 character limit for attachment in Jira. We create issue from scriptrunner mail handler. When e-mail have long than 256 character attachment, the email is not deleted from the inbox after creating a problem. And a e-mail is create a lot of issues.
How to check long attachment name in mail handler?

Thanks

Jira v7.12.1

Scriptrunner v5.6.1

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.config.util.JiraHome
import com.atlassian.jira.service.services.file.FileService
import com.atlassian.jira.service.util.ServiceUtils
import com.atlassian.jira.service.util.handler.MessageUserProcessor
import com.atlassian.jira.user.ApplicationUser
import com.atlassian.jira.user.util.UserManager
import com.atlassian.mail.MailUtils
import org.apache.commons.io.FileUtils
import javax.mail.Message

def userManager = ComponentAccessor.getComponent(UserManager)
def projectManager = ComponentAccessor.getProjectManager()
def issueFactory = ComponentAccessor.getIssueFactory()
def messageUserProcessor = ComponentAccessor.getComponent(MessageUserProcessor)
JiraHome jiraHome = ComponentAccessor.getComponent(JiraHome)

def subject = message.getSubject() as String
def issue = ServiceUtils.findIssueObjectInString(subject)

if (issue) {
return
}

ApplicationUser user = userManager.getUserByName("jiramail")
ApplicationUser reporter = messageUserProcessor.getAuthorFromSender(message) ?: user
def sender = message.getFrom() as String
def project = projectManager.getProjectObjByKey("AAA")
def issueObject = issueFactory.getIssue()
issueObject.setProjectObject(project)


def addressesTo = message.getRecipients(Message.RecipientType.TO) as String
def addressesCc = message.getRecipients(Message.RecipientType.CC) as String
def addressesBcc = message.getRecipients(Message.RecipientType.BCC) as String
def allAddresses = (addressesTo + addressesCc + addressesBcc) as String
// def addresses = addressesTo.take(254)
def customFieldManager = ComponentAccessor.getCustomFieldManager()
def kab = customFieldManager.getCustomFieldObjectByName("BBB")
issueObject.setCustomFieldValue(kab, allAddresses)


def sortSubject = subject.take(255) as String
issueObject.setSummary(sortSubject)
// issueObject.setSummary(subject)

issueObject.setDescription(MailUtils.getBody(message))

issueObject.setIssueTypeId(project.issueTypes.find { it.name == "Mail" }.id)
issueObject.setReporter(reporter)

// add sender to custom field
def emailCf = customFieldManager.getCustomFieldObjectByName("CCC")
issueObject.setCustomFieldValue(emailCf, sender)
// add sender to custom field

issue = messageHandlerContext.createIssue(user, issueObject)

def attachments = MailUtils.getAttachments(message)

attachments.each { MailUtils.Attachment attachment ->
def destination = new File(jiraHome.home, FileService.MAIL_DIR).getCanonicalFile()
def file = FileUtils.getFile(destination, attachment.filename) as File 
FileUtils.writeByteArrayToFile(file, attachment.contents)
messageHandlerContext.createAttachment(file, attachment.filename, attachment.contentType, user, issue) 
}