com.pixelmed.network
Class Association

java.lang.Object
  com.pixelmed.network.Association

public abstract class Association
extends Object

Field Summary

protected int	associationNumber
protected String	calledAETitle
protected String	callingAETitle
protected int	debugLevel
protected InputStream	in
protected String	localHostName
protected int	maximumLengthReceived
protected OutputStream	out
protected LinkedList	presentationContexts
protected String	remoteHostName
protected LinkedList	scuSCPRoleSelections
protected Socket	socket

Constructor Summary

protected

Association(int debugLevel)

Method Summary

void	abort() Send an A-ABORT-RQ.
int	getAssociationNumber()
AssociationOutputStream	getAssociationOutputStream(byte presentationContextID) A factory method to build an AssociationOutputStream for this Association, on which to send data which is fragmented as appropriate into PDUs.
abstract String	getCalledAEHostName()
abstract int	getCalledAEPort()
String	getCalledAETitle()
abstract String	getCallingAEHostName()
abstract int	getCallingAEPort()
String	getCallingAETitle()
String	getEndpointDescription()
protected String	getLocalHostName()
protected int	getLocalPort()
protected String	getRemoteHostName()
protected int	getRemotePort()
protected static byte[]	getRestOfPDU(InputStream in, byte[] startBuffer, int pduLength)
byte	getSuitablePresentationContextID(String abstractSyntaxUID) Find a Presentation Context for the a particular SOP Class UID, using any available Transfer Syntax but preferring compressed then, Explicit VR Little Endian, then any Explicit VR, over Implicit VR.
byte	getSuitablePresentationContextID(String abstractSyntaxUID, String transferSyntaxUID) Find a Presentation Context for a particular combination of SOP Class UID and Transfer Syntax.
String	getTransferSyntaxForPresentationContextID(byte identifier) Get the Transfer Syntax UID of the Presentation Context specified by the Presentation Context ID.
protected static void	readInsistently(InputStream in, byte[] b, int offset, int length, String what)
void	release() Send an A-RELEASE-RQ.
void	send(byte presentationContextID, byte[] command, byte[] data) Send a command and/or data in a single PDU, each PDV with the last fragment flag set.
void	setReceivedDataHandler(ReceivedDataHandler h) Register a ReceivedDataHandler to handle each PDU as it is received.
protected void	setSocketOptions(Socket socket, int ourMaximumLengthReceived, int socketReceiveBufferSize, int socketSendBufferSize, int debugLevel) Set the socket options for either initiator or acceptor.
String	toString()
void	waitForCommandPDataPDUs() Continue to transfer data (remain in State 6) until the last fragment of a command has been received.
void	waitForDataPDataPDUs() Continue to transfer data (remain in State 6) until the last fragment of data has been received.
void	waitForOnePDataPDU() Continue to transfer data (remain in State 6) until one PDU has been received.
void	waitForPDataPDUs(int count, boolean stopAfterLastFragmentOfCommand, boolean stopAfterLastFragmentOfData, boolean stopAfterHandlerReportsDone) Continue to transfer data (remain in State 6) until the specified number of PDUs have been received or the specified conditions are satisfied.
void	waitForPDataPDUsUntilHandlerReportsDone() Continue to transfer data (remain in State 6) until the data handler reports that it is done.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

associationNumber

protected int associationNumber

debugLevel

protected int debugLevel

calledAETitle

protected String calledAETitle

callingAETitle

protected String callingAETitle

presentationContexts

protected LinkedList presentationContexts

scuSCPRoleSelections

protected LinkedList scuSCPRoleSelections

maximumLengthReceived

protected int maximumLengthReceived

socket

protected Socket socket

in

protected InputStream in

out

protected OutputStream out

remoteHostName

protected String remoteHostName

localHostName

protected String localHostName

Constructor Detail

Association

protected Association(int debugLevel)

Method Detail

setSocketOptions

protected void setSocketOptions(Socket socket,
                                int ourMaximumLengthReceived,
                                int socketReceiveBufferSize,
                                int socketSendBufferSize,
                                int debugLevel)
                         throws IOException

Set the socket options for either initiator or acceptor.

Must be called before using the socket or the options won't set.

Parameters:

socket - the socket whose options to set

ourMaximumLengthReceived - the maximum PDU length that we will offer to receive

socketReceiveBufferSize - the TCP socket receive buffer size to set (if possible), 0 means leave at the default

socketSendBufferSize - the TCP socket send buffer size to set (if possible), 0 means leave at the default

debugLevel - 0 for no debugging, > 0 for increasingly verbose debugging

Throws:

IOException

readInsistently

protected static void readInsistently(InputStream in,
                                      byte[] b,
                                      int offset,
                                      int length,
                                      String what)
                               throws DicomNetworkException,
                                      IOException

Parameters:

in -

b -

offset -

length -

what -

Throws:

IOException

DicomNetworkException

getRestOfPDU

protected static byte[] getRestOfPDU(InputStream in,
                                     byte[] startBuffer,
                                     int pduLength)
                              throws DicomNetworkException,
                                     IOException

Parameters:

in -

startBuffer -

pduLength -

Throws:

IOException

DicomNetworkException

release

public void release()
             throws DicomNetworkException

Send an A-RELEASE-RQ. This is a confirmed service, so a normal return is the A-RELEASE confirmation primitive.

Throws:

DicomNetworkException

abort

public void abort()
           throws DicomNetworkException

Send an A-ABORT-RQ. This is an unconfirmed service, so a normal return is expected.

Throws:

DicomNetworkException

send

public void send(byte presentationContextID,
                 byte[] command,
                 byte[] data)
          throws DicomNetworkException

Send a command and/or data in a single PDU, each PDV with the last fragment flag set.

Parameters:

presentationContextID - included in the header of each PDU

command - the command PDV payload, or null if none

data - the data PDV payload, or null if none

Throws:

DicomNetworkException

getAssociationOutputStream

public AssociationOutputStream getAssociationOutputStream(byte presentationContextID)
                                                   throws DicomNetworkException

A factory method to build an AssociationOutputStream for this Association, on which to send data which is fragmented as appropriate into PDUs.

Parameters:

presentationContextID - included in the header of each PDU

Throws:

DicomNetworkException

setReceivedDataHandler

public void setReceivedDataHandler(ReceivedDataHandler h)
                            throws DicomNetworkException

Register a ReceivedDataHandler to handle each PDU as it is received.

Parameters:

h - an implementation of the abstract class ReceivedDataHandler

Throws:

DicomNetworkException

waitForPDataPDUs

public void waitForPDataPDUs(int count,
                             boolean stopAfterLastFragmentOfCommand,
                             boolean stopAfterLastFragmentOfData,
                             boolean stopAfterHandlerReportsDone)
                      throws DicomNetworkException,
                             AReleaseException

Continue to transfer data (remain in State 6) until the specified number of PDUs have been received or the specified conditions are satisfied. The registered receivedDataHandler is sent a PDataIndication.

Parameters:

count - the number of PDUs to be transferred, or -1 if no limit (stop only when conditions satisfied)

stopAfterLastFragmentOfCommand - stop after the last fragment of a command has been received

stopAfterLastFragmentOfData - stop after the last fragment of data has been received

stopAfterHandlerReportsDone - stop after data handler reports that it is done

Throws:

DicomNetworkException - A-ABORT or A-P-ABORT indication

AReleaseException - A-RELEASE indication; transport connection is closed

waitForOnePDataPDU

public void waitForOnePDataPDU()
                        throws DicomNetworkException,
                               AReleaseException

Continue to transfer data (remain in State 6) until one PDU has been received. The registered receivedDataHandler is sent a PDataIndication.

Throws:

DicomNetworkException - A-ABORT or A-P-ABORT indication

AReleaseException - A-RELEASE indication; transport connection is closed

waitForCommandPDataPDUs

public void waitForCommandPDataPDUs()
                             throws DicomNetworkException,
                                    AReleaseException

Continue to transfer data (remain in State 6) until the last fragment of a command has been received. The registered receivedDataHandler is sent a PDataIndication.

Throws:

DicomNetworkException - A-ABORT or A-P-ABORT indication

AReleaseException - A-RELEASE indication; transport connection is closed

waitForDataPDataPDUs

public void waitForDataPDataPDUs()
                          throws DicomNetworkException,
                                 AReleaseException

Continue to transfer data (remain in State 6) until the last fragment of data has been received. The registered receivedDataHandler is sent a PDataIndication.

Throws:

DicomNetworkException - A-ABORT or A-P-ABORT indication

AReleaseException - A-RELEASE indication; transport connection is closed

waitForPDataPDUsUntilHandlerReportsDone

public void waitForPDataPDUsUntilHandlerReportsDone()
                                             throws DicomNetworkException,
                                                    AReleaseException

Continue to transfer data (remain in State 6) until the data handler reports that it is done. The registered receivedDataHandler is sent a PDataIndication.

Throws:

DicomNetworkException - A-ABORT or A-P-ABORT indication

AReleaseException - A-RELEASE indication; transport connection is closed

getSuitablePresentationContextID

public byte getSuitablePresentationContextID(String abstractSyntaxUID)
                                      throws DicomNetworkException

Find a Presentation Context for the a particular SOP Class UID, using any available Transfer Syntax but preferring compressed then, Explicit VR Little Endian, then any Explicit VR, over Implicit VR.

Parameters:

abstractSyntaxUID - the SOP Class UID for which to find a suitable Presentation Context

Returns:

the Presentation Context ID of a suitable Presentation Context

Throws:

DicomNetworkException - thrown if no suitable Presentation Context

getSuitablePresentationContextID

public byte getSuitablePresentationContextID(String abstractSyntaxUID,
                                             String transferSyntaxUID)
                                      throws DicomNetworkException

Find a Presentation Context for a particular combination of SOP Class UID and Transfer Syntax.

Parameters:

abstractSyntaxUID - the SOP Class UID for which to find a suitable Presentation Context

transferSyntaxUID - the Transfer Syntax UID for which to find a suitable Presentation Context

Returns:

the Presentation Context ID of a suitable Presentation Context

Throws:

DicomNetworkException - thrown if no suitable Presentation Context

getTransferSyntaxForPresentationContextID

public String getTransferSyntaxForPresentationContextID(byte identifier)
                                                 throws DicomNetworkException

Get the Transfer Syntax UID of the Presentation Context specified by the Presentation Context ID.

Parameters:

identifier - the Presentation Context ID

Returns:

the only or first Transfer Syntax UID

Throws:

DicomNetworkException - thrown if no such Presentation Context or no Transfer Syntax for that Presentation Context (e.g. it was rejected)

getAssociationNumber

public int getAssociationNumber()

getCalledAETitle

public String getCalledAETitle()

getCallingAETitle

public String getCallingAETitle()

toString

public String toString()

Overrides:

toString in class Object

getEndpointDescription

public String getEndpointDescription()

getRemoteHostName

protected String getRemoteHostName()

getLocalHostName

protected String getLocalHostName()

getCallingAEHostName

public abstract String getCallingAEHostName()

getCalledAEHostName

public abstract String getCalledAEHostName()

getRemotePort

protected int getRemotePort()

getLocalPort

protected int getLocalPort()

getCallingAEPort

public abstract int getCallingAEPort()

getCalledAEPort

public abstract int getCalledAEPort()