com.voytechs.jnetstream.codec
Class Linker

java.lang.Object
  com.voytechs.jnetstream.npl.Visitor
      com.voytechs.jnetstream.codec.Linker

All Implemented Interfaces:

ProtocolLinker

public class Linker
extends Visitor
implements ProtocolLinker

Linker for NPL AST tree. Links all the variable references.

Field Summary

boolean

debug

Constructor Summary

Linker()

Method Summary

protected void	exportProperty(java.lang.String name, SymTable sym)
NodeList	getAST() Returns the root of the AST.
java.lang.String	getDefaultCandidate()
SymTable	getGlobalSymTable()
SymTable	getPacketSymTable()
SymTable	getTypesSymTable()
void	link(NodeList block)
void	linkHeaders(NodeList block)
void	linkProtocol(Protocol protocol)
void	linkProtocolBinding(Protocol proto)
void	loadTypePrimitives()
void	recordDefinitions(NodeList block) traverses the top level nodes and records their definitions in the SymTable.
void	resolveReferences(NodeList block)
void	resolveReferences(NodeList block, SymTable table)
void	resolveTypes(NodeList block)
boolean	traverse(AssertStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(BufferStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(ConstReferenceNode node, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(EnumReferenceNode node, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(EnumStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(FamilyStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(FieldStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(FlowentryStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(FlowkeyStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(ForStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(HeaderStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(IfStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(LinkStatement stat, java.lang.Object user1, java.lang.Object user2) Process the "link" NPL statement by linking protocol headers.
boolean	traverse(MutableReferenceNode node, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(OpNode op, java.lang.Object user1, java.lang.Object user2) Special OpNode traversal routine that records the last node visited.
boolean	traverse(PrintStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(ProcessStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(PropertyStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(VariableStatement stat, java.lang.Object user1, java.lang.Object user2)
boolean	traverse(WhileStatement stat, java.lang.Object user1, java.lang.Object user2)
void	unLinkProtocolBinding(ProtocolBinding binding)

Methods inherited from class com.voytechs.jnetstream.npl.Visitor

traverse, traverse, traverse, traverse, traverse, traverse, traverse, visit

Methods inherited from class java.lang.Object

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

Field Detail

debug

public boolean debug

Constructor Detail

Linker

public Linker()

Parameters:

-

Throws:

Method Detail

link

public void link(NodeList block)
          throws NodeException

Throws:

NodeException

resolveTypes

public void resolveTypes(NodeList block)
                  throws NodeException

Throws:

NodeException

resolveReferences

public void resolveReferences(NodeList block)
                       throws NodeException

Throws:

NodeException

resolveReferences

public void resolveReferences(NodeList block,
                              SymTable table)
                       throws NodeException

Throws:

NodeException

linkHeaders

public void linkHeaders(NodeList block)
                 throws NodeException

Throws:

NodeException

exportProperty

protected void exportProperty(java.lang.String name,
                              SymTable sym)

recordDefinitions

public void recordDefinitions(NodeList block)
                       throws NodeException

traverses the top level nodes and records their definitions in the SymTable. Only statement are expected at this level. If any non-statement nodes ie. expression are found, an error message is reported.

Throws:

NodeException

loadTypePrimitives

public void loadTypePrimitives()
                        throws NodeException

Throws:

NodeException

getAST

public NodeList getAST()

Returns the root of the AST.

traverse

public boolean traverse(FamilyStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(HeaderStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(FieldStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(AssertStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(BufferStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(FlowkeyStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(FlowentryStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(ProcessStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(LinkStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Process the "link" NPL statement by linking protocol headers.

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(MutableReferenceNode node,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(VariableStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(ConstReferenceNode node,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(EnumReferenceNode node,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(OpNode op,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Special OpNode traversal routine that records the last node visited.

Overrides:

traverse in class Visitor

Parameters:

op - OpNode to be traversed.

user1 - Depends at what stage of linking. Usually SymTable.

user2 - Parent node that called this.

Throws:

NodeException

traverse

public boolean traverse(IfStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(ForStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(WhileStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(PrintStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(EnumStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

traverse

public boolean traverse(PropertyStatement stat,
                        java.lang.Object user1,
                        java.lang.Object user2)
                 throws NodeException

Overrides:

traverse in class Visitor

Throws:

NodeException

getDefaultCandidate

public java.lang.String getDefaultCandidate()

Returns:

Returns the defaultCandidate.

linkProtocol

public void linkProtocol(Protocol protocol)
                  throws NodeException

Specified by:

linkProtocol in interface ProtocolLinker

Throws:

NodeException

linkProtocolBinding

public void linkProtocolBinding(Protocol proto)
                         throws ProtocolBindingException

Specified by:

linkProtocolBinding in interface ProtocolLinker

Throws:

ProtocolBindingException

getGlobalSymTable

public SymTable getGlobalSymTable()

Returns:

Returns the globalSymTable.

getPacketSymTable

public SymTable getPacketSymTable()

Returns:

Returns the packetSymTable.

getTypesSymTable

public SymTable getTypesSymTable()

Returns:

Returns the typesSymTable.

unLinkProtocolBinding

public void unLinkProtocolBinding(ProtocolBinding binding)

Specified by:

unLinkProtocolBinding in interface ProtocolLinker