com.holonplatform.core

Interface ExpressionResolver<E extends Expression,R extends Expression>

Type Parameters:

E - Expression type

R - Resolved expression type

All Superinterfaces:

Expression.ExpressionResolverFunction<E,R>, Serializable

All Known Subinterfaces:

DataTarget.DataTargetResolver<T>, QueryFilter.QueryFilterResolver<T>, QuerySort.QuerySortResolver<T>

All Known Implementing Classes:

CallbackExpressionResolver

public interface ExpressionResolver<E extends Expression,R extends Expression>
extends Expression.ExpressionResolverFunction<E,R>, Serializable

Resolver to translate an Expression into another Expression type.

The Priority annotation can be used on a resolver implementation class to control the invokation order within a set of resolvers. The less is the priority value, the more will be the priority level of the resolver.

Since:

5.0.0

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	ExpressionResolver.ExpressionResolverBuilder<C extends ExpressionResolver.ExpressionResolverBuilder<C>> Builder fragment to support ExpressionResolver registration.
static interface	ExpressionResolver.ExpressionResolverHandler Handler to perform Expression resolution using a set of registered ExpressionResolvers.
static interface	ExpressionResolver.ExpressionResolverProvider ExpressionResolver provider.
static interface	ExpressionResolver.ExpressionResolverSupport Interface to declare the support for ExpressionResolver by a class.
static interface	ExpressionResolver.ResolutionContext Expression resolution context.

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_PRIORITY Default ExpressionResolver priority if not specified using Priority annotation.

Method Summary

Modifier and Type	Method and Description
static <E extends Expression,R extends Expression> ExpressionResolver<E,R>	create(Class<? extends E> expressionType, Class<? extends R> resolvedType, Expression.ExpressionResolverFunction<E,R> function) Create an ExpressionResolver providing expression types and resolution function.
Class<? extends E>	getExpressionType() Get the expression type which this resolver can handle.
Class<? extends R>	getResolvedType() Get the resolved expression type

Methods inherited from interface com.holonplatform.core.Expression.ExpressionResolverFunction

resolve

Field Detail

DEFAULT_PRIORITY

static final int DEFAULT_PRIORITY

Default ExpressionResolver priority if not specified using Priority annotation.

See Also:

Constant Field Values

Method Detail

getExpressionType

Class<? extends E> getExpressionType()

Get the expression type which this resolver can handle.

Returns:

Expression type (not null)

getResolvedType

Class<? extends R> getResolvedType()

Get the resolved expression type

Returns:

Resolved expression type (not null)

create

static <E extends Expression,R extends Expression> ExpressionResolver<E,R> create(Class<? extends E> expressionType,
                                                                                  Class<? extends R> resolvedType,
                                                                                  Expression.ExpressionResolverFunction<E,R> function)

Create an ExpressionResolver providing expression types and resolution function.

Type Parameters:

E - Expression type

R - Resolved expression type

Parameters:

expressionType - The expression type which this resolver can handle (not null)

resolvedType - The resolved expression type (not null)

function - Actual resolver function (not null)

Returns:

A new ExpressionResolver