Package com._1c.g5.v8.dt.ql.resource

Class DbViewVirtualFieldProcessor

java.lang.Object

com._1c.g5.v8.dt.ql.resource.DbViewVirtualFieldProcessor

All Implemented Interfaces:

IExpectedTypesComputer

public class DbViewVirtualFieldProcessor
extends Object
implements IExpectedTypesComputer

Special class for processing virtual table (see SelectDbView) in Ql language
This class implements pattern "State"
The state defines by the processing virtual table (see SelectDbView)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DbViewVirtualFieldProcessor.State	Defines actual state of DbViewVirtualFieldProcessor

Constructor Summary

Constructors

Constructor	Description
DbViewVirtualFieldProcessor()

Method Summary

Modifier and Type	Method	Description
protected void	defineState(DbViewSelectDef virtualTable)	Defines actual state by virtualTable
DbViewVirtualFieldProcessor.State	getCurrentState()	Gets actual DbViewVirtualFieldProcessor.State
TypeDescriptionSource	getExpectedType(org.eclipse.emf.ecore.EObject expression, org.eclipse.emf.ecore.EStructuralFeature feature, int featureIndex)	Gets expected type for feature of expression
List<? extends DbViewElement>	getVirtualFields(DbViewSelectDef virtualTable, List<QuerySchemaTableParameter> parameters)	Computes fields for virtual table by list of parameters QuerySchemaTableParameter
IExpressionTypeChecker.CheckResult	validate(DbViewSelectDef virtualTable, List<QuerySchemaTableParameter> parameters)	Validates parameters for current virtual table

Methods inherited from class java.lang.Object

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

Constructor Detail

DbViewVirtualFieldProcessor

public DbViewVirtualFieldProcessor()

Method Detail

getVirtualFields

public List<? extends DbViewElement> getVirtualFields(DbViewSelectDef virtualTable,
                                                      List<QuerySchemaTableParameter> parameters)

Computes fields for virtual table by list of parameters QuerySchemaTableParameter

Parameters:

virtualTable - current virtual table, can't be null

parameters - list of QuerySchemaTableParameter

Returns:

list of computed fields. You should always return empty list if errors was detected.
Return results can't be null

validate

public IExpressionTypeChecker.CheckResult validate(DbViewSelectDef virtualTable,
                                                   List<QuerySchemaTableParameter> parameters)

Validates parameters for current virtual table

Parameters:

virtualTable - current virtual table, can't be null

parameters - list of QuerySchemaTableParameter, can't be null

Returns:

results of validation (see IExpressionTypeChecker.CheckResult).
Return results can be null if validator for virtualTable wasn't found

getCurrentState

public DbViewVirtualFieldProcessor.State getCurrentState()

Gets actual DbViewVirtualFieldProcessor.State

Returns:

current DbViewVirtualFieldProcessor.State or null if state hasn't been initialized yet

getExpectedType

public TypeDescriptionSource getExpectedType(org.eclipse.emf.ecore.EObject expression,
                                             org.eclipse.emf.ecore.EStructuralFeature feature,
                                             int featureIndex)

Description copied from interface: IExpectedTypesComputer

Gets expected type for feature of expression

Specified by:

getExpectedType in interface IExpectedTypesComputer

Parameters:

expression - expression, can't be null

feature - feature of the expression, can be null

featureIndex - index of feature

Returns:

expected type for feature of expression, empty TypeDescription corresponding to anything type

See Also:

ITypeSystem

defineState

protected void defineState(DbViewSelectDef virtualTable)

Defines actual state by virtualTable

Parameters:

virtualTable - current virtual table, can't be null