com.metamatrix.query.optimizer.xml
Class XMLNodeMappingVisitor

java.lang.Object
  com.metamatrix.query.sql.LanguageVisitor
      com.metamatrix.query.sql.visitor.ExpressionMappingVisitor
          com.metamatrix.query.sql.visitor.AbstractSymbolMappingVisitor
              com.metamatrix.query.optimizer.xml.XMLNodeMappingVisitor

public class XMLNodeMappingVisitor
extends AbstractSymbolMappingVisitor

This visitor is able to map symbols based on the XML document model: given a symbol representing one of the nodes of the document which is mapped, this object will find the Symbol representing the relational element it is mapped to.

Constructor Summary

XMLNodeMappingVisitor(MappingDocument rootNode, QueryMetadataInterface metadata)
Constructor for XMLNodeMappingVisitor.

Method Summary

static Criteria	convertCriteria(Criteria simpleCrit, MappingDocument rootNode, QueryMetadataInterface metadata) Convert the criteria from names using document identifiers to names using result set (i.e.
static LanguageObject	convertObject(LanguageObject object, MappingDocument rootNode, QueryMetadataInterface metadata)
protected Symbol	getMappedSymbol(Symbol symbol) Get the mapped symbol from the specified symbol.

Methods inherited from class com.metamatrix.query.sql.visitor.AbstractSymbolMappingVisitor

getUnmappedSymbols, replaceExpression, visit, visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class com.metamatrix.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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

XMLNodeMappingVisitor

public XMLNodeMappingVisitor(MappingDocument rootNode,
                             QueryMetadataInterface metadata)

Constructor for XMLNodeMappingVisitor.

Method Detail

getMappedSymbol

protected Symbol getMappedSymbol(Symbol symbol)

Description copied from class: AbstractSymbolMappingVisitor

Get the mapped symbol from the specified symbol. Subclasses should implement this method to look up the target symbol from the specified symbol.

Specified by:

getMappedSymbol in class AbstractSymbolMappingVisitor

Parameters:

symbol - Source symbol

Returns:

Target symbol

See Also:

AbstractSymbolMappingVisitor.getMappedSymbol(Symbol)

convertCriteria

public static Criteria convertCriteria(Criteria simpleCrit,
                                       MappingDocument rootNode,
                                       QueryMetadataInterface metadata)
                                throws QueryPlannerException,
                                       MetaMatrixComponentException

Convert the criteria from names using document identifiers to names using result set (i.e. mapping class) identifiers.

Parameters:

simpleCrit - Criteria to convert

rootNode - Root of mapping node tree

Returns:

Criteria Converted criteria

Throws:

QueryPlannerException - if simpleCrit has a XML document model element that is not mapped to data in a mapping class

MetaMatrixComponentException

convertObject

public static LanguageObject convertObject(LanguageObject object,
                                           MappingDocument rootNode,
                                           QueryMetadataInterface metadata)
                                    throws QueryPlannerException,
                                           MetaMatrixComponentException

Throws:

QueryPlannerException

MetaMatrixComponentException