org.teiid.query.sql.visitor
Class CriteriaTranslatorVisitor

java.lang.Object
  org.teiid.query.sql.LanguageVisitor
      org.teiid.query.sql.visitor.ExpressionMappingVisitor
          org.teiid.query.sql.visitor.CriteriaTranslatorVisitor

public class CriteriaTranslatorVisitor
extends ExpressionMappingVisitor

This class is used to translate criteria specified on the user's update command against the virtual group, the elements on this criteria are replaced by elements on the query transformation that defines the virtual group. Parts of the criteria are selectively translated if a CriteriaSelector is specified, also if the user explicty defines translations for some of the elements those translations override any symbol mappings.

Constructor Summary

CriteriaTranslatorVisitor()
This constructor initialises the visitor

CriteriaTranslatorVisitor(java.util.Map symbolMap)
This constructor initializes this object by setting the symbolMap.

Method Summary

java.util.Map<ElementSymbol,Reference>	getImplicitParams()
Expression	replaceExpression(Expression obj)
void	setCriteriaSelector(CriteriaSelector selector) Set the criteria selector used to restrict the part of the criteria that needs to be translated.
void	setTranslations(java.util.Collection translations) Set the translations to be used to replace elements on the user's command against the virtual group.
void	translate(Criteria crit)

Methods inherited from class org.teiid.query.sql.visitor.ExpressionMappingVisitor

createAliases, getVariableValues, mapExpressions, setVariableValues, 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 org.teiid.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

Methods inherited from class java.lang.Object

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

Constructor Detail

CriteriaTranslatorVisitor

public CriteriaTranslatorVisitor()

This constructor initialises the visitor

CriteriaTranslatorVisitor

public CriteriaTranslatorVisitor(java.util.Map symbolMap)

This constructor initializes this object by setting the symbolMap.

Parameters:

symbolMap - A map of virtual elements to their counterparts in transform defining the virtual group

Method Detail

setCriteriaSelector

public void setCriteriaSelector(CriteriaSelector selector)

Set the criteria selector used to restrict the part of the criteria that needs to be translated.

Parameters:

selector - The CriteriaSelector on the TranslateCriteria object

setTranslations

public void setTranslations(java.util.Collection translations)

Set the translations to be used to replace elements on the user's command against the virtual group.

Parameters:

translations - Collection of ComapreCriteria objects used to specify translations

replaceExpression

public Expression replaceExpression(Expression obj)

Overrides:

replaceExpression in class ExpressionMappingVisitor

getImplicitParams

public java.util.Map<ElementSymbol,Reference> getImplicitParams()

translate

public void translate(Criteria crit)
               throws QueryValidatorException

Throws:

QueryValidatorException