org.teiid.query.sql.visitor

Class AbstractSymbolMappingVisitor

java.lang.Object

org.teiid.query.sql.LanguageVisitor

org.teiid.query.sql.visitor.ExpressionMappingVisitor

org.teiid.query.sql.visitor.AbstractSymbolMappingVisitor

Direct Known Subclasses:

StaticSymbolMappingVisitor

public abstract class AbstractSymbolMappingVisitor
extends ExpressionMappingVisitor

This class is used to update LanguageObjects by replacing one set of symbols with another. There is one abstract method which must be overridden to define how the mapping lookup occurs.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractSymbolMappingVisitor()

Method Summary

Modifier and Type	Method and Description
protected abstract Symbol	getMappedSymbol(Symbol symbol) Get the mapped symbol from the specified symbol.
List	getUnmappedSymbols() Get all symbols that were not mapped during life of visitor.
Expression	replaceExpression(Expression element)
void	visit(Delete obj) This method updates the Delete object it receives as an argument by replacing the virtual groups/elements with their physical counterparts.
void	visit(Insert obj) This method updates the Insert object it receives as an argument by replacing the virtual groups/elements with their physical counterparts.
void	visit(MultipleElementSymbol obj) Swap each ElementSymbol referenced by AllInGroupSymbol
void	visit(SetClause obj)
void	visit(StoredProcedure obj) Swap name of stored proc and elements in stored procedure parameter expressions
void	visit(UnaryFromClause obj) Swap group in unary from clause.
void	visit(Update obj) This method updates the Update object it receives as an argument by replacing the virtual groups/elements with their physical counterparts.

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

createAliases, getVariableValues, isClone, mapExpressions, mapExpressions, setClone, 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, 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, visit

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractSymbolMappingVisitor

protected AbstractSymbolMappingVisitor()

Method Detail

getMappedSymbol

protected abstract Symbol getMappedSymbol(Symbol symbol)

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

Parameters:

symbol - Source symbol

Returns:

Target symbol

visit

public void visit(Insert obj)

This method updates the Insert object it receives as an argument by replacing the virtual groups/elements with their physical counterparts.

Overrides:

visit in class ExpressionMappingVisitor

Parameters:

obj - The Insert object to be updated with physical groups/elements

See Also:

LanguageVisitor.visit(org.teiid.query.sql.lang.Insert)

visit

public void visit(Delete obj)

This method updates the Delete object it receives as an argument by replacing the virtual groups/elements with their physical counterparts.

Overrides:

visit in class LanguageVisitor

Parameters:

obj - The Delete object to be updated with physical groups

visit

public void visit(Update obj)

This method updates the Update object it receives as an argument by replacing the virtual groups/elements with their physical counterparts.

Overrides:

visit in class LanguageVisitor

Parameters:

obj - The Update object to be updated with physical groups

visit

public void visit(SetClause obj)

Overrides:

visit in class ExpressionMappingVisitor

visit

public void visit(MultipleElementSymbol obj)

Swap each ElementSymbol referenced by AllInGroupSymbol

Overrides:

visit in class LanguageVisitor

Parameters:

obj - Object to remap

visit

public void visit(UnaryFromClause obj)

Swap group in unary from clause.

Overrides:

visit in class LanguageVisitor

Parameters:

obj - Object to remap

visit

public void visit(StoredProcedure obj)

Swap name of stored proc and elements in stored procedure parameter expressions

Overrides:

visit in class ExpressionMappingVisitor

Parameters:

obj - Object to remap

replaceExpression

public Expression replaceExpression(Expression element)

Overrides:

replaceExpression in class ExpressionMappingVisitor

See Also:

ExpressionMappingVisitor.replaceExpression(org.teiid.query.sql.symbol.Expression)

getUnmappedSymbols

public List getUnmappedSymbols()

Get all symbols that were not mapped during life of visitor. If all symbols were mapped, this will return null.

Returns:

List of ElementSymbol and GroupSymbol that were unmapped OR null if all symbols mapped successfully