org.eclipse.persistence.jpa.jpql
Class NumericResolver

java.lang.Object
  org.eclipse.persistence.jpa.jpql.Resolver
      org.eclipse.persistence.jpa.jpql.NumericResolver

public class NumericResolver
extends Resolver

This Resolver is responsible to return the numeric type for a list of Resolvers.

The result of a CASE expression, COALESCE expression, NULLIF expression, or arithmetic expression (+, -, *, /) is determined by applying the following rule to its operands.

• If there is an operand of type Double or double, the result of the operation is of type Double;
• otherwise, if there is an operand of type Float or float, the result of the operation is of type Float;
• otherwise, if there is an operand of type BigDecimal, the result of the operation is of type BigDecimal;
• otherwise, if there is an operand of type BigInteger, the result of the operation is of type BigInteger, unless the operator is / (division), in which case the numeric result type is not further defined;
• otherwise, if there is an operand of type Long or long, the result of the operation is of type Long, unless the operator is / (division), in which case the numeric result type is not further defined;
• otherwise, if there is an operand of integral type, the result of the operation is of type Integer, unless the operator is / (division), in which case the numeric result type is not further defined.

Version:

2.4

Author:

Pascal Filion

Since:

2.3

Constructor Summary

NumericResolver(Resolver parent, java.util.Collection<Resolver> typeResolvers)
Creates a new NumericResolver.

NumericResolver(Resolver parent, Resolver resolver)
Creates a new NumericResolver.

Method Summary

void	accept(ResolverVisitor visitor) Visits this Resolver by the given visitor.
protected IType	buildType() Resolves the IType of the property handled by this Resolver.
protected ITypeDeclaration	buildTypeDeclaration() Resolves the ITypeDeclaration of the property handled by this Resolver.

Methods inherited from class org.eclipse.persistence.jpa.jpql.Resolver

addChild, checkParent, getChild, getManagedType, getMapping, getParent, getParentManagedType, getParentMapping, getParentType, getParentTypeDeclaration, getProvider, getQuery, getType, getType, getType, getTypeDeclaration, getTypeHelper, getTypeRepository, isNullAllowed, setNullAllowed

Methods inherited from class java.lang.Object

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

Constructor Detail

NumericResolver

public NumericResolver(Resolver parent,
                       java.util.Collection<Resolver> typeResolvers)

Creates a new NumericResolver.

Parameters:

parent - The parent Resolver, which is never null

typeResolvers - The resolvers used to calculate the numeric type

NumericResolver

public NumericResolver(Resolver parent,
                       Resolver resolver)

Creates a new NumericResolver.

Parameters:

parent - The parent Resolver, which is never null

resolver - The Resolver used to calculate the numeric type

Method Detail

accept

public void accept(ResolverVisitor visitor)

Visits this Resolver by the given visitor.

Specified by:

accept in class Resolver

Parameters:

visitor - The visitor to visit this object

buildType

protected IType buildType()

Resolves the IType of the property handled by this Resolver.

Overrides:

buildType in class Resolver

Returns:

Either the IType that was resolved by this Resolver or the IType for IType.UNRESOLVABLE_TYPE if it could not be resolved

buildTypeDeclaration

protected ITypeDeclaration buildTypeDeclaration()

Resolves the ITypeDeclaration of the property handled by this Resolver.

Specified by:

buildTypeDeclaration in class Resolver

Returns:

Either the ITypeDeclaration that was resolved by this Resolver or the ITypeDeclaration for IType.UNRESOLVABLE_TYPE if it could not be resolved