Java compact2, compact3 java.rmi.server Class ObjID（JDK8）

Field Detail

• REGISTRY_ID

  public static final int REGISTRY_ID

  Object number for well-known ObjID of the registry.

  See Also:

  Constant Field Values

• ACTIVATOR_ID

  public static final int ACTIVATOR_ID

  Object number for well-known ObjID of the activator.

  See Also:

  Constant Field Values

• DGC_ID

  public static final int DGC_ID

  Object number for well-known ObjID of the distributed garbage collector.

  See Also:

  Constant Field Values

Constructor Detail

• ObjID

  public ObjID()

  Generates a unique object identifier.

  If the system property java.rmi.server.randomIDs is defined to equal the string "true" (case insensitive), then this constructor will use a cryptographically strong random number generator to choose the object number of the returned ObjID.

• ObjID

  public ObjID(int objNum)

  Creates a "well-known" object identifier.

  An ObjID created via this constructor will not clash with any ObjIDs generated via the no-arg constructor.

  Parameters:

  objNum - object number for well-known object identifier

Method Detail

• write

  public void write(ObjectOutput out)
             throws IOException

  Marshals a binary representation of this ObjID to an ObjectOutput instance.

  Specifically, this method first invokes the given stream's DataOutput.writeLong(long) method with this object identifier's object number, and then it writes its address space identifier by invoking its UID.write(DataOutput) method with the stream.

  Parameters:

  out - the ObjectOutput instance to write this ObjID to

  Throws:

  IOException - if an I/O error occurs while performing this operation

• read

  public static ObjID read(ObjectInput in)
                    throws IOException

  Constructs and returns a new ObjID instance by unmarshalling a binary representation from an ObjectInput instance.

  Specifically, this method first invokes the given stream's DataInput.readLong() method to read an object number, then it invokes UID.read(DataInput) with the stream to read an address space identifier, and then it creates and returns a new ObjID instance that contains the object number and address space identifier that were read from the stream.

  Parameters:

  in - the ObjectInput instance to read ObjID from

  Returns:

  unmarshalled ObjID instance

  Throws:

  IOException - if an I/O error occurs while performing this operation

• hashCode

  public int hashCode()

  Returns the hash code value for this object identifier, the object number.

  Overrides:

  hashCode in class Object

  Returns:

  the hash code value for this object identifier

  See Also:

  Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

• equals

  public boolean equals(Object obj)

  Compares the specified object with this ObjID for equality. This method returns true if and only if the specified object is an ObjID instance with the same object number and address space identifier as this one.

  Overrides:

  equals in class Object

  Parameters:

  obj - the object to compare this ObjID to

  Returns:

  true if the given object is equivalent to this one, and false otherwise

  See Also:

  Object.hashCode(), HashMap

• toString

  public String toString()

  Returns a string representation of this object identifier.

  Overrides:

  toString in class Object

  Returns:

  a string representation of this object identifier