Class BluetoothUuid

java.lang.Object
com.codename1.bluetooth.BluetoothUuid
public final class BluetoothUuid extends Object

Immutable 128-bit Bluetooth UUID value type used throughout the com.codename1.bluetooth API for services, characteristics and descriptors. The Codename One core has no java.util.UUID, so this class fills that role and adds Bluetooth-specific conveniences: 16/32-bit SIG assigned numbers are expanded over the Bluetooth Base UUID via fromShort(int) and recognized by isShortUuid().

BluetoothUuid heartRate = BluetoothUuid.fromShort(0x180D);
BluetoothUuid custom = BluetoothUuid.fromString(
        "5f47a3c0-1234-4e6b-9d00-000000000001");

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final BluetoothUuid
    BASE
    The Bluetooth Base UUID, 00000000-0000-1000-8000-00805f9b34fb.
    static final BluetoothUuid
    CCCD
    The Client Characteristic Configuration descriptor (0x2902) written by the stack when enabling notifications/indications.
    static final BluetoothUuid
    SPP
    The classic Serial Port Profile service (0x1101) used as the default UUID for RFCOMM connections.

  • Constructor Summary

    Constructors
    Constructor
    Description
    BluetoothUuid(long mostSigBits, long leastSigBits)
    Creates a UUID from its raw 64-bit halves, mirroring java.util.UUID(long, long).

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    equals(Object o)
    Indicates whether some other object is "equal to" this one.
    static BluetoothUuid
    fromShort(int assignedNumber)
    Expands a 16 or 32-bit Bluetooth SIG assigned number over the Bluetooth Base UUID, e.g.
    static BluetoothUuid
    fromString(String uuid)
    Parses a UUID string.
    long
    getLeastSignificantBits()
    The least significant 64 bits, mirroring java.util.UUID.getLeastSignificantBits().
    long
    getMostSignificantBits()
    The most significant 64 bits, mirroring java.util.UUID.getMostSignificantBits().
    int
    getShortValue()
    The 16/32-bit SIG assigned number of a Base-UUID derivation.
    int
    hashCode()
    Returns a hash code value for the object.
    boolean
    isShortUuid()
    true when this UUID is a Bluetooth Base UUID derivation, i.e.
    String
    toString()
    Canonical lowercase 36 character form, e.g.

    Methods inherited from class Object

    clone, getClass, notify, notifyAll, wait, wait, wait

  • Field Details

    • BASE

      public static final BluetoothUuid BASE
      The Bluetooth Base UUID, 00000000-0000-1000-8000-00805f9b34fb. All 16/32-bit SIG assigned numbers are derivations of it.

    • CCCD

      public static final BluetoothUuid CCCD
      The Client Characteristic Configuration descriptor (0x2902) written by the stack when enabling notifications/indications.

    • SPP

      public static final BluetoothUuid SPP
      The classic Serial Port Profile service (0x1101) used as the default UUID for RFCOMM connections.

  • Constructor Details

    • BluetoothUuid

      public BluetoothUuid(long mostSigBits, long leastSigBits)
      Creates a UUID from its raw 64-bit halves, mirroring java.util.UUID(long, long).

  • Method Details

    • fromString

      public static BluetoothUuid fromString(String uuid)
      Parses a UUID string. Accepts the full canonical 36 character form (0000180d-0000-1000-8000-00805f9b34fb), an 8 hex digit 32-bit SIG assigned number (0000180D) or a 4 hex digit 16-bit one (180D); the short forms are expanded over the Bluetooth Base UUID. Case insensitive. Throws IllegalArgumentException on malformed input.

    • fromShort

      public static BluetoothUuid fromShort(int assignedNumber)
      Expands a 16 or 32-bit Bluetooth SIG assigned number over the Bluetooth Base UUID, e.g. fromShort(0x180D) yields 0000180d-0000-1000-8000-00805f9b34fb (the Heart Rate service).

    • getMostSignificantBits

      public long getMostSignificantBits()
      The most significant 64 bits, mirroring java.util.UUID.getMostSignificantBits().

    • getLeastSignificantBits

      public long getLeastSignificantBits()
      The least significant 64 bits, mirroring java.util.UUID.getLeastSignificantBits().

    • isShortUuid

      public boolean isShortUuid()
      true when this UUID is a Bluetooth Base UUID derivation, i.e. a 16/32-bit SIG assigned number expanded via fromShort(int) or an equivalent string form. When true, getShortValue() returns the assigned number.

    • getShortValue

      public int getShortValue()
      The 16/32-bit SIG assigned number of a Base-UUID derivation. Throws IllegalStateException when isShortUuid() is false.

    • toString

      public String toString()
      Canonical lowercase 36 character form, e.g. 0000180d-0000-1000-8000-00805f9b34fb.
      Overrides:
      toString in class Object

    • equals

      public boolean equals(Object o)
      Description copied from class: Object
      Indicates whether some other object is "equal to" this one. The equals method implements an equivalence relation: It is reflexive: for any reference value x, x.equals(x) should return true. It is symmetric: for any reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true. It is transitive: for any reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true. It is consistent: for any reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the object is modified. For any non-null reference value x, x.equals(null) should return false. The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any reference values x and y, this method returns true if and only if x and y refer to the same object (x==y has the value true).
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Description copied from class: Object
      Returns a hash code value for the object. This method is supported for the benefit of hashtables such as those provided by java.util.Hashtable. The general contract of hashCode is: Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hashtables. As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.)
      Overrides:
      hashCode in class Object