Package org.osgi.service.upnp

Interface UPnPStateVariable

All Known Subinterfaces:
UPnPLocalStateVariable
public interface UPnPStateVariable
The meta-information of a UPnP state variable as declared in the device's service state table (SST).

Method calls to interact with a device (e.g. UPnPAction.invoke(...);) use this class to encapsulate meta information about the input and output arguments.

The actual values of the arguments are passed as Java objects. The mapping of types from UPnP data types to Java data types is described with the field definitions.

  • Field Details

    • TYPE_UI1

      static final String TYPE_UI1
      Unsigned 1 Byte int.

      Mapped to an Integer object.

      See Also:

    • TYPE_UI2

      static final String TYPE_UI2
      Unsigned 2 Byte int.

      Mapped to Integer object.

      See Also:

    • TYPE_UI4

      static final String TYPE_UI4
      Unsigned 4 Byte int.

      Mapped to Long object.

      See Also:

    • TYPE_I1

      static final String TYPE_I1
      1 Byte int.

      Mapped to Integer object.

      See Also:

    • TYPE_I2

      static final String TYPE_I2
      2 Byte int.

      Mapped to Integer object.

      See Also:

    • TYPE_I4

      static final String TYPE_I4
      4 Byte int.

      Must be between -2147483648 and 2147483647

      Mapped to Integer object.

      See Also:

    • TYPE_INT

      static final String TYPE_INT
      Integer number.

      Mapped to Integer object.

      See Also:

    • TYPE_R4

      static final String TYPE_R4
      4 Byte float.

      Same format as float. Must be between 3.40282347E+38 to 1.17549435E-38.

      Mapped to Float object.

      See Also:

    • TYPE_R8

      static final String TYPE_R8
      8 Byte float.

      Same format as float. Must be between -1.79769313486232E308 and -4.94065645841247E-324 for negative values, and between 4.94065645841247E-324 and 1.79769313486232E308 for positive values, i.e., IEEE 64-bit (8-Byte) double.

      Mapped to Double object.

      See Also:

    • TYPE_NUMBER

      static final String TYPE_NUMBER
      Same as r8.

      Mapped to Double object.

      See Also:

    • TYPE_FIXED_14_4

      static final String TYPE_FIXED_14_4
      Same as r8 but no more than 14 digits to the left of the decimal point and no more than 4 to the right.

      Mapped to Double object.

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    • TYPE_FLOAT

      static final String TYPE_FLOAT
      Floating-point number.

      Mantissa (left of the decimal) and/or exponent may have a leading sign. Mantissa and/or exponent may have leading zeros. Decimal character in mantissa is a period, i.e., whole digits in mantissa separated from fractional digits by period. Mantissa separated from exponent by E. (No currency symbol.) (No grouping of digits in the mantissa, e.g., no commas.)

      Mapped to Float object.

      See Also:

    • TYPE_CHAR

      static final String TYPE_CHAR
      Unicode string.

      One character long.

      Mapped to Character object.

      See Also:

    • TYPE_STRING

      static final String TYPE_STRING
      Unicode string.

      No limit on length.

      Mapped to String object.

      See Also:

    • TYPE_DATE

      static final String TYPE_DATE
      A calendar date.

      Date in a subset of ISO 8601 format without time data.

      See http://www.w3.org/TR/ xmlschema-2/#date .

      Mapped to java.util.Date object. Always 00:00 hours.

      See Also:

    • TYPE_DATETIME

      static final String TYPE_DATETIME
      A specific instant of time.

      Date in ISO 8601 format with optional time but no time zone.

      See http://www.w3.org /TR/xmlschema-2/#dateTime .

      Mapped to java.util.Date object using default time zone.

      See Also:

    • TYPE_DATETIME_TZ

      static final String TYPE_DATETIME_TZ
      A specific instant of time.

      Date in ISO 8601 format with optional time and optional time zone.

      See http://www.w3.org /TR/xmlschema-2/#dateTime .

      Mapped to java.util.Date object adjusted to default time zone.

      See Also:

    • TYPE_TIME

      static final String TYPE_TIME
      An instant of time that recurs every day.

      Time in a subset of ISO 8601 format with no date and no time zone.

      See http://www.w3.org /TR/xmlschema-2/#time .

      Mapped to Long. Converted to milliseconds since midnight.

      See Also:

    • TYPE_TIME_TZ

      static final String TYPE_TIME_TZ
      An instant of time that recurs every day.

      Time in a subset of ISO 8601 format with optional time zone but no date.

      See http://www.w3.org /TR/xmlschema-2/#time .

      Mapped to Long object. Converted to milliseconds since midnight and adjusted to default time zone, wrapping at 0 and 24*60*60*1000.

      See Also:

    • TYPE_BOOLEAN

      static final String TYPE_BOOLEAN
      True or false.

      Mapped to Boolean object.

      See Also:

    • TYPE_BIN_BASE64

      static final String TYPE_BIN_BASE64
      MIME-style Base64 encoded binary BLOB.

      Takes 3 Bytes, splits them into 4 parts, and maps each 6 bit piece to an octet. (3 octets are encoded as 4.) No limit on size.

      Mapped to byte[] object. The Java byte array will hold the decoded content of the BLOB.

      See Also:

    • TYPE_BIN_HEX

      static final String TYPE_BIN_HEX
      Hexadecimal digits representing octets.

      Treats each nibble as a hex digit and encodes as a separate Byte. (1 octet is encoded as 2.) No limit on size.

      Mapped to byte[] object. The Java byte array will hold the decoded content of the BLOB.

      See Also:

    • TYPE_URI

      static final String TYPE_URI
      Universal Resource Identifier.

      Mapped to String object.

      See Also:

    • TYPE_UUID

      static final String TYPE_UUID
      Universally Unique ID.

      Hexadecimal digits representing octets. Optional embedded hyphens are ignored.

      Mapped to String object.

      See Also:

  • Method Details

    • getName

      String getName()
      Returns the variable name.
      • All standard variables defined by a UPnP Forum working committee must not begin with X_ nor A_.
      • All non-standard variables specified by a UPnP vendor and added to a standard service must begin with X_.

      This method must continue to return the state variable name after the UPnP state variable has been removed from the network.

      Returns:
      Name of state variable. Must not contain a hyphen character nor a hash character. Should be < 32 characters.

    • getJavaDataType

      Class<?> getJavaDataType()
      Returns the Java class associated with the UPnP data type of this state variable.

      Mapping between the UPnP data types and Java classes is performed according to the schema mentioned above. 

       
  Integer              ui1, ui2, i1, i2, i4, int
  Long                 ui4, time, time.tz
  Float                r4, float
  Double               r8, number, fixed.14.4
  Character            char
  String               string, uri, uuid
  Date                 date, dateTime, dateTime.tz
  Boolean              boolean
  byte[]               bin.base64, bin.hex

      This method must continue to return the state variable java type after the UPnP state variable has been removed from the network.

      Returns:
      A class object corresponding to the Java type of this argument.

    • getUPnPDataType

      String getUPnPDataType()
      Returns the UPnP type of this state variable. Valid types are defined as constants.

      This method must continue to return the state variable UPnP data type after the UPnP state variable has been removed from the network.

      Returns:
      The UPnP data type of this state variable, as defined in above constants.

    • getDefaultValue

      Object getDefaultValue()
      Returns the default value, if defined.

      This method must continue to return the state variable default value after the UPnP state variable has been removed from the network.

      Returns:
      The default value or null if not defined. The type of the returned object can be determined by getJavaDataType.

    • getAllowedValues

      String[] getAllowedValues()
      Returns the allowed values, if defined. Allowed values can be defined only for String types.

      This method must continue to return the state variable allowed values after the UPnP state variable has been removed from the network.

      Returns:
      The allowed values or null if not defined. Should be less than 32 characters.

    • getMinimum

      Number getMinimum()
      Returns the minimum value, if defined. Minimum values can only be defined for numeric types.

      This method must continue to return the state variable minimum value after the UPnP state variable has been removed from the network.

      Returns:
      The minimum value or null if not defined.

    • getMaximum

      Number getMaximum()
      Returns the maximum value, if defined. Maximum values can only be defined for numeric types.

      This method must continue to return the state variable maximum value after the UPnP state variable has been removed from the network.

      Returns:
      The maximum value or null if not defined.

    • getStep

      Number getStep()
      Returns the size of an increment operation, if defined. Step sizes can be defined only for numeric types.

      This method must continue to return the step size after the UPnP state variable has been removed from the network.

      Returns:
      The increment size or null if not defined.

    • sendsEvents

      boolean sendsEvents()
      Tells if this StateVariable can be used as an event source. If the StateVariable is eventable, an event listener service can be registered to be notified when changes to the variable appear.

      This method must continue to return the correct value after the UPnP state variable has been removed from the network.

      Returns:
      true if the StateVariable generates events, false otherwise.