Package javax.jmdns.impl

Class DNSEntry

  • Direct Known Subclasses:
    DNSQuestion, DNSRecord
    public abstract class DNSEntry
extends Object
    DNS entry with a name, type, and class. This is the base class for questions and records.
    Author:
    Arthur van Hoff, Pierre Frisch, Rick Blair

    • Method Detail

      • isSameEntry

        public boolean isSameEntry​(DNSEntry entry)
        Check if two entries have exactly the same name, type, and class.
        Parameters:
        entry -
        Returns:
        true if the two entries have are for the same record, false otherwise

      • sameSubtype

        public boolean sameSubtype​(DNSEntry other)
        Check if two entries have the same subtype.
        Parameters:
        other -
        Returns:
        true if the two entries have are for the same subtype, false otherwise

      • matchRecordClass

        public boolean matchRecordClass​(DNSRecordClass recordClass)
        Check if the requested record class match the current record class
        Parameters:
        recordClass -
        Returns:
        true if the two entries have compatible class, false otherwise

      • matchRecordType

        public boolean matchRecordType​(DNSRecordType recordType)
        Check if the requested record tyep match the current record type
        Parameters:
        recordType -
        Returns:
        true if the two entries have compatible type, false otherwise

      • getSubtype

        public String getSubtype()
        Returns the subtype of this entry
        Returns:
        subtype of this entry

      • getName

        public String getName()
        Returns the name of this entry
        Returns:
        name of this entry

      • getType

        public String getType()
        Returns:
        the type

      • getKey

        public String getKey()
        Returns the key for this entry. The key is the lower case name.
        Returns:
        key for this entry

      • getRecordType

        public DNSRecordType getRecordType()
        Returns:
        record type

      • getRecordClass

        public DNSRecordClass getRecordClass()
        Returns:
        record class

      • isUnique

        public boolean isUnique()
        Returns:
        true if unique

      • isServicesDiscoveryMetaQuery

        public boolean isServicesDiscoveryMetaQuery()

      • isDomainDiscoveryQuery

        public boolean isDomainDiscoveryQuery()

      • isReverseLookup

        public boolean isReverseLookup()

      • isV4ReverseLookup

        public boolean isV4ReverseLookup()

      • isV6ReverseLookup

        public boolean isV6ReverseLookup()

      • isStale

        public abstract boolean isStale​(long now)
        Check if the record is stale, i.e. it has outlived more than half of its TTL.
        Parameters:
        now - update date
        Returns:
        true is the record is stale, false otherwise.

      • isExpired

        public abstract boolean isExpired​(long now)
        Check if the record is expired.
        Parameters:
        now - update date
        Returns:
        true is the record is expired, false otherwise.

      • isSameRecordClass

        public boolean isSameRecordClass​(DNSEntry entry)
        Check that 2 entries are of the same class.
        Parameters:
        entry -
        Returns:
        true is the two class are the same, false otherwise.

      • isSameType

        public boolean isSameType​(DNSEntry entry)
        Check that 2 entries are of the same type.
        Parameters:
        entry -
        Returns:
        true is the two type are the same, false otherwise.

      • toByteArray

        protected byte[] toByteArray()
        Creates a byte array representation of this record. This is needed for tie-break tests according to draft-cheshire-dnsext-multicastdns-04.txt chapter 9.2.
        Returns:
        byte array representation

      • compareTo

        public int compareTo​(DNSEntry that)
        Does a lexicographic comparison of the byte array representation of this record and that record. This is needed for tie-break tests according to draft-cheshire-dnsext-multicastdns-04.txt chapter 9.2.
        Parameters:
        that -
        Returns:
        a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object.

      • hashCode

        public int hashCode()
        Overriden, to return a value which is consistent with the value returned by equals(Object).
        Overrides:
        hashCode in class Object

      • toString

        protected void toString​(StringBuilder sb)
        Parameters:
        sb -