Class RPCause

  • All Implemented Interfaces:
    DataObject, FastSerializable, Serializable

    public final class RPCause
    extends AbstractLazyEncodedByteArray
    implements FastSerializable
    Class RPCause represents the cause of a relay protocol error. It represents the ASN.1 OCTET STRING type CAP-datatypes.RPCause.

    The API offered by this class is as if the type were specified in ASN.1 as follows.

     RPCause ::= SEQUENCE {
       causeValue CauseValue,
       diagnostic INTEGER (0..255) OPTIONAL
     }
    The class takes care of encoding the field values into a byte-array and decoding field values from a byte-array, the encoded representation being as tabulated below.

    Data Encoding - based on 3GPP TS 24.011 V8.2.0 (2009-06) §8.2.5.4 pp39-41
    87654321
    1 octetExt?Cause value
    1 octet*Diagnostic if any

    The octet numbering in the above table is that used in 3GPP TS 24.011 version 8.2.0 (2009-06). Field names ending in ? are booleans: 1 for true, 0 for false. The optional diagnostic is present iff the Ext bit is 1. (This is different from what the standard says about the Ext bit, because what the standard says is nonsense and google found some code here http://www.mail-archive.com/wireshark-dev@wireshark.org/msg00580.html that does make sense.)
    See Also:
    Serialized Form
    • Constructor Detail

      • RPCause

        public RPCause()
        Constructs a new RPCause object with no fields set.
      • RPCause

        public RPCause​(byte[] data)
        Constructs a new RPCause object from network-encoded data. The data is not decoded and might not be decodable.
        Parameters:
        data - network-encoded data
        Throws:
        NullPointerException - if data is null
      • RPCause

        public RPCause​(byte[] data,
                       int start,
                       int len)
        Constructs a new RPCause object from part of network-encoded data. The part starts at index start and is len bytes long. The data is not decoded and might not be decodable.
        Parameters:
        data - network-encoded data
        start - starting offset of network-encoded data in byte array
        len - default length if not predictable
        Throws:
        NullPointerException - if data is null
        IllegalArgumentException - if len is negative
      • RPCause

        public RPCause​(DataInput in)
                throws IOException
        Constructs a new RPCause object from data deserialized from a stream that was written by toStream(DataOutput).
        Parameters:
        in - the stream to read from
        Throws:
        EOFException - if reading is pre-empted by end-of-file
        IOException - if the data cannot be read
      • RPCause

        public RPCause​(RPCause.CauseValue causeValue)
        Constructs a new RPCause object from the given argument, with no diagnostic.
        Parameters:
        causeValue - the cause
      • RPCause

        public RPCause​(RPCause.CauseValue causeValue,
                       int diagnostic)
        Constructs a new RPCause object from the given arguments.
        Parameters:
        causeValue - the cause
        diagnostic - the diagnostic associated with the cause. Not all causes permit and not all protocols support diagnostic information, in which case don't use this constructor.
    • Method Detail

      • hasCauseValue

        public boolean hasCauseValue()
                              throws DecodeException
        Tests whether the field CauseValue has a value.
        Returns:
        whether the field has a value
        Throws:
        DecodeException - if encoded state cannot be decoded
      • hasDiagnostic

        public boolean hasDiagnostic()
                              throws DecodeException
        Tests whether the field Diagnostic has a value.
        Returns:
        whether the field has a value
        Throws:
        DecodeException - if encoded state cannot be decoded
      • setDiagnosticPresent

        public RPCause setDiagnosticPresent​(boolean flag)
                                     throws IllegalStateException
        Sets the presence or absence of the field Diagnostic.
        Parameters:
        flag - whether the field should be marked as present
        Returns:
        this
        Throws:
        IllegalStateException - if this instance has been marked as read-only
      • getDiagnostic

        public int getDiagnostic()
                          throws DecodeException
        Gets the value of any diagnostic.
        Returns:
        int representation of any diagnostic
        Throws:
        DecodeException - if encoded state cannot be decoded
      • copyOf

        public static RPCause copyOf​(RPCause from)
        Creates a new object of this type, cloning the values of common fields from the given object of any subclass of the same base type.
        Parameters:
        from - the object from which to copy
        Returns:
        RPCause
      • getFieldAccessors

        public static FieldAccessor[] getFieldAccessors()
        Gets a new array of the accessors for fields of this type.
        Returns:
        FieldAccessor[]
      • getFieldsMap

        public Map<String,​Object> getFieldsMap​(boolean withAbsents)
        Gets a Map from field-name to field-value for the fields of a sequence. For a field of primitive type, the field-value is boxed. For an absent optional field, the field-value is AbstractFieldsObject.FIELD_ABSENT. For an uninitialised mandatory field, the field-value is AbstractFieldsObject.FIELD_UNINITIALISED. For a field of String type, the encoded form is used if the String cannot be decoded. For a type that represents an OCTET STRING that cannot be decoded, a map from "encodedValue" to the byte array value is returned.
        Specified by:
        getFieldsMap in class AbstractFieldsObject
        Parameters:
        withAbsents - whether to put absent optional fields into Map
        Returns:
        Map from field-name to field-value
      • encodedIsInvalid

        protected boolean encodedIsInvalid()
        Determines whether the encoded form is invalid.
        Returns:
        boolean
      • getEncodedForm

        public byte[] getEncodedForm()
                              throws EncodeException
        Gets the encoded form.
        Returns:
        encoded form
        Throws:
        EncodeException - if encoding fails