mailbox/api/src/main/java/org/apache/james/mailbox/MailboxUtil.java

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package org.apache.james.mailbox;

import org.apache.james.mailbox.model.Mailbox;

public class MailboxUtil {

    public static boolean isMailboxChildOf(Mailbox mailbox, Mailbox potentialParent, MailboxSession mailboxSession) {
        return mailbox.getNamespace().equals(potentialParent.getNamespace())
            && mailbox.getUser().equals(potentialParent.getUser())
            && mailbox.getName().startsWith(potentialParent.getName() + mailboxSession.getPathDelimiter());
    }
}