com.metamatrix.query.resolver.util
Class BindVariableVisitor

java.lang.Object
  com.metamatrix.query.sql.LanguageVisitor
      com.metamatrix.query.resolver.util.BindVariableVisitor

public class BindVariableVisitor
extends LanguageVisitor

Given a LanguageObject containing References and the List of String binding expressions from a query transformation, this visitor will parse and resolve each binding and set the resolved expression on the appropriate Reference, making sure to match up the correct binding with the correct Reference. The Reference is fully resolved after this happens.

Optionally, a Map can be built up which maps the String virtual group to a List of Reference objects which have bindings to an element of the virtual group key. This may be useful to have on hand the Reference objects which are dependent on the changing tuples of a virtual group during query processing.

Constructor Summary

BindVariableVisitor(java.util.List bindings, QueryMetadataInterface metadata)
Constructor

Method Summary

static void	bindReferences(LanguageObject obj, java.util.List bindings, QueryMetadataInterface metadata) Convenient static method for using this visitor
MetaMatrixComponentException	getComponentException()
QueryResolverException	getResolverException()
void	visit(Reference obj) Visit a Reference object and bind it based on the bindings
void	visit(StoredProcedure storedProcedure)

Methods inherited from class com.metamatrix.query.sql.LanguageVisitor

setAbort, shouldAbort, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class java.lang.Object

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

Constructor Detail

BindVariableVisitor

public BindVariableVisitor(java.util.List bindings,
                           QueryMetadataInterface metadata)

Constructor

Parameters:

bindings - List of String binding expressions from query transformation node

metadata - source of metadata

Method Detail

getComponentException

public MetaMatrixComponentException getComponentException()

getResolverException

public QueryResolverException getResolverException()

visit

public void visit(Reference obj)

Visit a Reference object and bind it based on the bindings

Overrides:

visit in class LanguageVisitor

See Also:

LanguageVisitor.visit(Reference)

visit

public void visit(StoredProcedure storedProcedure)

Overrides:

visit in class LanguageVisitor

bindReferences

public static void bindReferences(LanguageObject obj,
                                  java.util.List bindings,
                                  QueryMetadataInterface metadata)
                           throws QueryResolverException,
                                  MetaMatrixComponentException

Convenient static method for using this visitor

Parameters:

obj - LanguageObject which has References to be bound

bindings - List of String binding expressions from query transformation node

metadata - source of metadata

boundReferencesMap - Map to be filled with String group name to List of References

Throws:

QueryResolverException

MetaMatrixComponentException