com.holonplatform.core.internal

Class DefaultExpressionResolverRegistry

java.lang.Object

com.holonplatform.core.internal.DefaultExpressionResolverRegistry

All Implemented Interfaces:

ExpressionResolver.ExpressionResolverHandler, ExpressionResolver.ExpressionResolverProvider, ExpressionResolver.ExpressionResolverSupport, ExpressionResolverRegistry, Serializable

public class DefaultExpressionResolverRegistry
extends Object
implements ExpressionResolverRegistry

Default ExpressionResolverRegistry implementation.

Since:

5.0.0

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DefaultExpressionResolverRegistry() Contructor with cache enabled by default.
DefaultExpressionResolverRegistry(boolean cacheEnabled) Contructor with cache enabling flag.

Method Summary

Modifier and Type	Method and Description
<E extends Expression,R extends Expression> void	addExpressionResolver(ExpressionResolver<E,R> expressionResolver) Add an ExpressionResolver.
Iterable<ExpressionResolver>	getExpressionResolvers() Get the available ExpressionResolvers.
<E extends Expression,R extends Expression> void	removeExpressionResolver(ExpressionResolver<E,R> expressionResolver) Remove an ExpressionResolver.
<E extends Expression,R extends Expression> Optional<R>	resolve(E expression, Class<R> resolutionType, ExpressionResolver.ResolutionContext context) Try to resolve given expression to obtain an Expression of the specified resolutionType, using the suitable ExpressionResolvers among all available resolvers for given expression and resolution type.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.holonplatform.core.ExpressionResolverRegistry

create, create

Methods inherited from interface com.holonplatform.core.ExpressionResolver.ExpressionResolverSupport

addExpressionResolvers

Constructor Detail

DefaultExpressionResolverRegistry

public DefaultExpressionResolverRegistry()

Contructor with cache enabled by default.

DefaultExpressionResolverRegistry

public DefaultExpressionResolverRegistry(boolean cacheEnabled)

Contructor with cache enabling flag.

Parameters:

cacheEnabled - Whether to enable the expression resolvers cache

Method Detail

addExpressionResolver

public <E extends Expression,R extends Expression> void addExpressionResolver(ExpressionResolver<E,R> expressionResolver)

Description copied from interface: ExpressionResolver.ExpressionResolverSupport

Add an ExpressionResolver.

Specified by:

addExpressionResolver in interface ExpressionResolver.ExpressionResolverSupport

Type Parameters:

E - Expression type

R - Resolved expression type

Parameters:

expressionResolver - Resolver to add (not null)

removeExpressionResolver

public <E extends Expression,R extends Expression> void removeExpressionResolver(ExpressionResolver<E,R> expressionResolver)

Description copied from interface: ExpressionResolver.ExpressionResolverSupport

Remove an ExpressionResolver.

Specified by:

removeExpressionResolver in interface ExpressionResolver.ExpressionResolverSupport

Type Parameters:

E - Expression type

R - Resolved expression type

Parameters:

expressionResolver - Resolver to remove (not null)

getExpressionResolvers

public Iterable<ExpressionResolver> getExpressionResolvers()

Description copied from interface: ExpressionResolver.ExpressionResolverProvider

Get the available ExpressionResolvers.

Specified by:

getExpressionResolvers in interface ExpressionResolver.ExpressionResolverProvider

Returns:

the available ExpressionResolvers iterable (not null)

resolve

public <E extends Expression,R extends Expression> Optional<R> resolve(E expression,
                                                                       Class<R> resolutionType,
                                                                       ExpressionResolver.ResolutionContext context)
                                                                throws Expression.InvalidExpressionException

Description copied from interface: ExpressionResolver.ExpressionResolverHandler

Try to resolve given expression to obtain an Expression of the specified resolutionType, using the suitable ExpressionResolvers among all available resolvers for given expression and resolution type.

ExpressionResolvers invokation order is defined relying on Priority annotation on resolvers class, if available.

Specified by:

resolve in interface ExpressionResolver.ExpressionResolverHandler

Type Parameters:

E - Expression type to resolve

R - Resolved expression type

Parameters:

expression - Expression to resolve (not null)

resolutionType - Type of the expression to obtain from resolvers (not null)

context - Resolution context

Returns:

Optional resolved expression, empty if none of the suitable ExpressionResolvers, if any, resolved the expression

Throws:

Expression.InvalidExpressionException - If an error occurred during expression resolution