com.ericsson.otp.erlang
Class OtpErlangPid

java.lang.Object
  extended by com.ericsson.otp.erlang.OtpErlangObject
      extended by com.ericsson.otp.erlang.OtpErlangPid
All Implemented Interfaces:
java.io.Serializable, java.lang.Cloneable, java.lang.Comparable<java.lang.Object>

public class OtpErlangPid
extends OtpErlangObject
implements java.lang.Comparable<java.lang.Object>

Provides a Java representation of Erlang PIDs. PIDs represent Erlang processes and consist of a nodename and a number of integers.

See Also:
Serialized Form

Nested Class Summary
 
Nested classes/interfaces inherited from class com.ericsson.otp.erlang.OtpErlangObject
OtpErlangObject.Hash
 
Field Summary
 
Fields inherited from class com.ericsson.otp.erlang.OtpErlangObject
hashCodeValue
 
Constructor Summary
protected OtpErlangPid(int tag, java.lang.String node, int id, int serial, int creation)
          Create an Erlang pid from its components.
  OtpErlangPid(OtpInputStream buf)
          Create an Erlang PID from a stream containing a PID encoded in Erlang external format.
  OtpErlangPid(OtpLocalNode self)
          Deprecated. use OtpLocalNode:createPid() instead
  OtpErlangPid(java.lang.String node, int id, int serial, int creation)
          Create an Erlang pid from its components.
 
Method Summary
 int compareTo(java.lang.Object o)
           
 int creation()
          Get the creation number from the PID.
protected  int doHashCode()
           
 void encode(OtpOutputStream buf)
          Convert this PID to the equivalent Erlang external representation.
 boolean equals(java.lang.Object o)
          Determine if two PIDs are equal.
 int id()
          Get the id number from the PID.
 java.lang.String node()
          Get the node name from the PID.
 int serial()
          Get the serial number from the PID.
protected  int tag()
           
 java.lang.String toString()
          Get the string representation of the PID.
 
Methods inherited from class com.ericsson.otp.erlang.OtpErlangObject
bind, clone, decode, hashCode, match
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
 

Constructor Detail

OtpErlangPid

@Deprecated
public OtpErlangPid(OtpLocalNode self)
Deprecated. use OtpLocalNode:createPid() instead

Create a unique Erlang PID belonging to the local node.

Parameters:
self - the local node.

OtpErlangPid

public OtpErlangPid(OtpInputStream buf)
             throws OtpErlangDecodeException
Create an Erlang PID from a stream containing a PID encoded in Erlang external format.

Parameters:
buf - the stream containing the encoded PID.
Throws:
OtpErlangDecodeException - if the buffer does not contain a valid external representation of an Erlang PID.

OtpErlangPid

public OtpErlangPid(java.lang.String node,
                    int id,
                    int serial,
                    int creation)
Create an Erlang pid from its components.

Parameters:
node - the nodename.
id - an arbitrary number. Only the low order 15 bits will be used.
serial - another arbitrary number. Only the low order 13 bits will be used.
creation - yet another arbitrary number. Ony the low order 2 bits will be used.

OtpErlangPid

protected OtpErlangPid(int tag,
                       java.lang.String node,
                       int id,
                       int serial,
                       int creation)
Create an Erlang pid from its components.

Parameters:
tag - the external format to be compliant with OtpExternal.pidTag where only a subset of the bits are significant (see other constructor). OtpExternal.newPidTag where all 32 bits of id,serial and creation are significant. newPidTag can only be decoded by OTP-19 and newer.
node - the nodename.
id - an arbitrary number.
serial - another arbitrary number.
creation - yet another arbitrary number.
Method Detail

tag

protected int tag()

serial

public int serial()
Get the serial number from the PID.

Returns:
the serial number from the PID.

id

public int id()
Get the id number from the PID.

Returns:
the id number from the PID.

creation

public int creation()
Get the creation number from the PID.

Returns:
the creation number from the PID.

node

public java.lang.String node()
Get the node name from the PID.

Returns:
the node name from the PID.

toString

public java.lang.String toString()
Get the string representation of the PID. Erlang PIDs are printed as #Pid<node.id.serial>

Specified by:
toString in class OtpErlangObject
Returns:
the string representation of the PID.

encode

public void encode(OtpOutputStream buf)
Convert this PID to the equivalent Erlang external representation.

Specified by:
encode in class OtpErlangObject
Parameters:
buf - an output stream to which the encoded PID should be written.

equals

public boolean equals(java.lang.Object o)
Determine if two PIDs are equal. PIDs are equal if their components are equal.

Specified by:
equals in class OtpErlangObject
Parameters:
o - the other PID to compare to.
Returns:
true if the PIDs are equal, false otherwise.

doHashCode

protected int doHashCode()
Overrides:
doHashCode in class OtpErlangObject

compareTo

public int compareTo(java.lang.Object o)
Specified by:
compareTo in interface java.lang.Comparable<java.lang.Object>