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java.lang.Objectorg.eclipse.persistence.jpa.jpql.Resolver
public abstract class Resolver
A Resolver
is responsible to resolve a property by retrieving either the managed
type, the mapping, the type and the type declaration depending on the type of resolver.
Provisional API: This interface is part of an interim API that is still under development and expected to change significantly before reaching stability. It is available at this early stage to solicit feedback from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken (repeatedly) as the API evolves.
Constructor Summary | |
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protected |
Resolver(Resolver parent)
Creates a new Resolver . |
Method Summary | |
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abstract void |
accept(ResolverVisitor visitor)
Visits this Resolver by the given visitor . |
protected void |
addChild(java.lang.String variableName,
Resolver resolver)
Caches the given Resolver . |
protected IType |
buildType()
Resolves the IType of the property handled by this Resolver . |
protected abstract ITypeDeclaration |
buildTypeDeclaration()
Resolves the ITypeDeclaration of the property handled by this Resolver . |
protected void |
checkParent(Resolver parent)
|
protected Resolver |
getChild(java.lang.String variableName)
Retrieves the child of this Resolver that has the given variable name. |
IManagedType |
getManagedType()
Returns the IManagedType associated with the field handled by this Resolver . |
IMapping |
getMapping()
Returns the IMapping for the wrapped field. |
Resolver |
getParent()
Returns the parent of this Resolver . |
protected IManagedType |
getParentManagedType()
Returns the managed type of the parent resolver. |
protected IMapping |
getParentMapping()
Returns the IMapping of the parent resolver. |
protected IType |
getParentType()
Returns the type of the parent resolver. |
protected ITypeDeclaration |
getParentTypeDeclaration()
Returns the type declaration of the parent resolver. |
protected IManagedTypeProvider |
getProvider()
Returns the provider of managed types. |
protected IQuery |
getQuery()
Returns the external form representing the JPQL query. |
IType |
getType()
Returns the IType of the field handled by this Resolver . |
protected IType |
getType(java.lang.Class<?> type)
Returns the IType of the given Java type. |
protected IType |
getType(java.lang.String typeName)
Retrieves the external class for the given fully qualified class name. |
protected ITypeDeclaration |
getTypeDeclaration()
Returns the ITypeDeclaration of the field handled by this Resolver . |
protected TypeHelper |
getTypeHelper()
Returns a helper that gives access to the most common types . |
protected ITypeRepository |
getTypeRepository()
Returns the type repository for the application. |
boolean |
isNullAllowed()
Determines whether the Expression
to be created, which wraps the attribute or query key name allows the target of the 1:1
relationship to be null if there is no corresponding relationship in the database. |
void |
setNullAllowed(boolean nullAllowed)
Sets whether the Expression to be
created, which wraps the attribute or query key name allows the target of the 1:1 relationship
to be null if there is no corresponding relationship in the database. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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protected Resolver(Resolver parent)
Resolver
.
parent
- The parent of this resolver, which is never null
java.lang.NullPointerException
- If the parent is null
Method Detail |
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public abstract void accept(ResolverVisitor visitor)
Resolver
by the given visitor
.
visitor
- The visitor
to visit this objectprotected final void addChild(java.lang.String variableName, Resolver resolver)
Resolver
.
variableName
- The key used to cache the given Resolver
resolver
- The Resolver
to cacheprotected IType buildType()
IType
of the property handled by this Resolver
.
IType
that was resolved by this Resolver
or the IType
for IType.UNRESOLVABLE_TYPE
if it could not be resolvedprotected abstract ITypeDeclaration buildTypeDeclaration()
ITypeDeclaration
of the property handled by this Resolver
.
ITypeDeclaration
that was resolved by this Resolver
or the
ITypeDeclaration
for IType.UNRESOLVABLE_TYPE
if it could not be resolvedprotected void checkParent(Resolver parent)
protected final Resolver getChild(java.lang.String variableName)
Resolver
that has the given variable name.
variableName
- The name of the property that was cached
Resolver
mapped with the given property name; otherwise null
public IManagedType getManagedType()
IManagedType
associated with the field handled by this Resolver
.
If this Resolver
does not handle a field that has a IManagedType
, then
null
should be returned.
For example: "SELECT e FROM Employee e
", the Resolver
for
e would be returning the IManagedType
for Employee.
IManagedType
, if it could be resolved; null
otherwisepublic IMapping getMapping()
IMapping
for the wrapped field.
IMapping
or null
if none existspublic Resolver getParent()
Resolver
.
Resolver
protected final IManagedType getParentManagedType()
protected final IMapping getParentMapping()
IMapping
of the parent resolver.
IMapping
of the parent resolverprotected final IType getParentType()
protected final ITypeDeclaration getParentTypeDeclaration()
protected final IManagedTypeProvider getProvider()
protected IQuery getQuery()
public final IType getType()
IType
of the field handled by this Resolver
.
IType
that was resolved by this Resolver
or the IType
for IType.UNRESOLVABLE_TYPE
if it could not be resolvedprotected final IType getType(java.lang.Class<?> type)
IType
of the given Java type.
type
- The Java type for which its external form will be returned
IType
representing the given Java typeprotected final IType getType(java.lang.String typeName)
typeName
- The fully qualified class name of the class to retrieve
protected final ITypeDeclaration getTypeDeclaration()
ITypeDeclaration
of the field handled by this Resolver
.
ITypeDeclaration
that was resolved by this Resolver
or the
ITypeDeclaration
for IType.UNRESOLVABLE_TYPE
if it could not be resolvedprotected final TypeHelper getTypeHelper()
types
.
IType
protected final ITypeRepository getTypeRepository()
ITypes
public boolean isNullAllowed()
Expression
to be created, which wraps the attribute or query key name allows the target of the 1:1
relationship to be null
if there is no corresponding relationship in the database.
true
to allow null
if the corresponding relationship in the
database does not exists; false
otherwisepublic void setNullAllowed(boolean nullAllowed)
Expression
to be
created, which wraps the attribute or query key name allows the target of the 1:1 relationship
to be null
if there is no corresponding relationship in the database.
nullAllowed
- true
to allow null
if the corresponding
relationship in the database does not exists; false
otherwise
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