net.sf.farrago.ddl
Class DdlHandler

java.lang.Object
  net.sf.farrago.ddl.DdlHandler

All Implemented Interfaces:

ReflectiveVisitor

Direct Known Subclasses:

DdlMedHandler, DdlRelationalHandler, DdlRoutineHandler, DdlSecurityHandler, FarragoRngDdlHandler

public abstract class DdlHandler
extends Object
implements ReflectiveVisitor

DdlHandler is an abstract base for classes which provide implementations for the actions taken by DdlValidator on individual objects. See FarragoSessionDdlHandler for an explanation.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/ddl/DdlHandler.java#41 $

Author:

John V. Sichi

Field Summary

protected FarragoRepos	repos
protected FarragoResource	res An instance of FarragoResource for use in throwing validation errors.
protected static Logger	tracer
protected FarragoSessionDdlValidator	validator

Constructor Summary

DdlHandler(FarragoSessionDdlValidator validator)

Method Summary

Throwable	adjustExceptionParserPosition(CwmModelElement modelElement, Throwable ex)
void	convertFieldToCwmColumn(RelDataTypeField field, CwmColumn column, CwmNamespace owner) Initializes a CwmColumn definition based on a RelDataTypeField.
private void	convertSqlToCatalogType(SqlDataTypeSpec dataType, FemSqltypedElement element)
private void	convertTypeToCwmColumn(RelDataType type, CwmColumn column, CwmNamespace owner) Populates a CwmColumn object with type information.
FarragoSessionDdlValidator	getValidator()
private RuntimeException	newContextException(CwmModelElement element, Exception e) Adds position information to an exception.
void	validateAttribute(FemAbstractAttribute attribute)
void	validateAttributeSet(CwmClass cwmClass)
void	validateBaseColumnSet(FemBaseColumnSet columnSet)
private void	validateDefaultClause(FemAbstractAttribute attribute, FarragoSession session, String defaultExpression)
void	validateTypedElement(FemAbstractTypedElement abstractElement, CwmNamespace cwmNamespace)
private void	validateTypedElement(FemSqltypedElement element, CwmNamespace cwmNamespace)

Methods inherited from class java.lang.Object

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

Field Detail

tracer

protected static final Logger tracer

validator

protected final FarragoSessionDdlValidator validator

repos

protected final FarragoRepos repos

res

protected final FarragoResource res

An instance of FarragoResource for use in throwing validation errors. The name is intentionally short to keep line length under control.

Constructor Detail

DdlHandler

public DdlHandler(FarragoSessionDdlValidator validator)

Method Detail

getValidator

public FarragoSessionDdlValidator getValidator()

validateAttributeSet

public void validateAttributeSet(CwmClass cwmClass)

validateBaseColumnSet

public void validateBaseColumnSet(FemBaseColumnSet columnSet)

validateAttribute

public void validateAttribute(FemAbstractAttribute attribute)

convertSqlToCatalogType

private void convertSqlToCatalogType(SqlDataTypeSpec dataType,
                                     FemSqltypedElement element)

validateTypedElement

public void validateTypedElement(FemAbstractTypedElement abstractElement,
                                 CwmNamespace cwmNamespace)

validateTypedElement

private void validateTypedElement(FemSqltypedElement element,
                                  CwmNamespace cwmNamespace)

newContextException

private RuntimeException newContextException(CwmModelElement element,
                                             Exception e)

Adds position information to an exception.

This method is similar to SqlValidator.newValidationError(SqlNode, SqlValidatorException) and should be unified with it, if only we could figure out how.

Parameters:

element - Element which had the error, and is therefore the locus of the exception

e - Exception raised

Returns:

Exception with position information

convertFieldToCwmColumn

public void convertFieldToCwmColumn(RelDataTypeField field,
                                    CwmColumn column,
                                    CwmNamespace owner)

Initializes a CwmColumn definition based on a RelDataTypeField.

As well as calling CwmStructuralFeature.setType(CwmClassifier), also calls CwmColumn.setPrecision(Integer), CwmColumn.setScale(Integer) and CwmColumn.setIsNullable(NullableType).

If the column has no name, the name is initialized from the field name; otherwise, the existing name is left unmodified.

Parameters:

field - input field

column - on input, contains unintialized CwmColumn instance;

owner - The object which is to own any anonymous datatypes created; typically, the table which this column belongs to

"Precondition:"

field != null && column != null && owner != null

convertTypeToCwmColumn

private void convertTypeToCwmColumn(RelDataType type,
                                    CwmColumn column,
                                    CwmNamespace owner)

Populates a CwmColumn object with type information.

As well as calling CwmStructuralFeature.setType(CwmClassifier), also calls CwmColumn.setPrecision(Integer), CwmColumn.setScale(Integer) and CwmColumn.setIsNullable(NullableType).

If the type is structured or a multiset, the implementation is recursive.

Parameters:

type - Type to convert

column - Column to populate with type information

owner - The object which is to own any anonymous datatypes created; typically, the table which this column belongs to

adjustExceptionParserPosition

public Throwable adjustExceptionParserPosition(CwmModelElement modelElement,
                                               Throwable ex)

validateDefaultClause

private void validateDefaultClause(FemAbstractAttribute attribute,
                                   FarragoSession session,
                                   String defaultExpression)