Class IntrospectionELResolver

java.lang.Object

jakarta.el.ELResolver

io.micronaut.el.resolver.IntrospectionELResolver

All Implemented Interfaces:

io.micronaut.core.order.Ordered, ELMethodExecutor

@Internal
public final class IntrospectionELResolver
extends jakarta.el.ELResolver
implements ELMethodExecutor

The ELResolver resolving the types annotated with Introspected through the bean introspection generated for them at compilation time.

The properties are read and written through the generated BeanIntrospection, so no reflection is used. The methods annotated with io.micronaut.context.annotation.Executable are invoked the same way; the other methods are left to the rest of the chain. A type without an introspection is left unresolved, so that the standard resolvers of the specification can handle it.

Since:

1.0

Author:

Denis Stepanov

Field Summary

Fields inherited from interface io.micronaut.core.order.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

Constructors

Constructor	Description
IntrospectionELResolver()	Creates a resolver using the shared introspector.
IntrospectionELResolver(boolean readOnly)
IntrospectionELResolver(io.micronaut.core.beans.BeanIntrospector introspector, boolean readOnly)

Method Summary

Modifier and Type	Method	Description
@Nullable Class<?>	getCommonPropertyType(jakarta.el.ELContext context, @Nullable Object base)
int	getOrder()	Returns the executor order.
@Nullable Class<?>	getType(jakarta.el.ELContext context, @Nullable Object base, @Nullable Object property)
@Nullable Object	getValue(jakarta.el.ELContext context, @Nullable Object base, @Nullable Object property)
@Nullable Object	invoke(jakarta.el.ELContext context, @Nullable Object base, @Nullable Object method, Class<?> @Nullable [] paramTypes, Object @Nullable [] params)
boolean	isReadOnly(jakarta.el.ELContext context, @Nullable Object base, @Nullable Object property)
@Nullable ELMethod	resolve(jakarta.el.ELContext context, @Nullable Object base, @Nullable Object method, io.micronaut.core.type.Argument<?> @Nullable [] argumentTypes, Object @Nullable [] arguments)	Resolves an instance or static method, or a constructor represented by <init>.
void	setValue(jakarta.el.ELContext context, @Nullable Object base, @Nullable Object property, @Nullable Object value)

Methods inherited from class jakarta.el.ELResolver

convertToType

Methods inherited from class Object

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

Methods inherited from interface ELMethodExecutor

isReflective, resolveFunction

Constructor Details

IntrospectionELResolver

public IntrospectionELResolver()

Creates a resolver using the shared introspector.

IntrospectionELResolver

public IntrospectionELResolver(boolean readOnly)

Parameters:

readOnly - Whether the resolver should reject the assignment of properties

IntrospectionELResolver

public IntrospectionELResolver(io.micronaut.core.beans.BeanIntrospector introspector,
 boolean readOnly)

Parameters:

introspector - The introspector

readOnly - Whether the resolver should reject the assignment of properties

Method Details

getOrder

public int getOrder()

Description copied from interface: ELMethodExecutor

Returns the executor order. Lower values run first, following the Micronaut Ordered contract, so direct/generated implementations can take precedence over a general fallback such as reflection.

Specified by:

getOrder in interface ELMethodExecutor

Specified by:

getOrder in interface io.micronaut.core.order.Ordered

Returns:

The order, zero by default

getValue

public @Nullable Object getValue(jakarta.el.ELContext context,
 @Nullable Object base,
 @Nullable Object property)

Specified by:

getValue in class jakarta.el.ELResolver

getType

public @Nullable Class<?> getType(jakarta.el.ELContext context,
 @Nullable Object base,
 @Nullable Object property)

Specified by:

getType in class jakarta.el.ELResolver

setValue

public void setValue(jakarta.el.ELContext context,
 @Nullable Object base,
 @Nullable Object property,
 @Nullable Object value)

Specified by:

setValue in class jakarta.el.ELResolver

isReadOnly

public boolean isReadOnly(jakarta.el.ELContext context,
 @Nullable Object base,
 @Nullable Object property)

Specified by:

isReadOnly in class jakarta.el.ELResolver

invoke

public @Nullable Object invoke(jakarta.el.ELContext context,
 @Nullable Object base,
 @Nullable Object method,
 Class<?> @Nullable [] paramTypes,
 Object @Nullable [] params)

Overrides:

invoke in class jakarta.el.ELResolver

resolve

public @Nullable ELMethod resolve(jakarta.el.ELContext context,
 @Nullable Object base,
 @Nullable Object method,
 io.micronaut.core.type.Argument<?> @Nullable [] argumentTypes,
 Object @Nullable [] arguments)

Description copied from interface: ELMethodExecutor

Resolves an instance or static method, or a constructor represented by <init>.

Specified by:

resolve in interface ELMethodExecutor

Parameters:

context - The EL context

base - The instance, or an ELClass for a static method or constructor

method - The method name

argumentTypes - The parameter types supplied when the method expression was created, or null

arguments - The evaluated arguments, or null

Returns:

The resolved method, or null when this executor does not handle it

getCommonPropertyType

public @Nullable Class<?> getCommonPropertyType(jakarta.el.ELContext context,
 @Nullable Object base)

Specified by:

getCommonPropertyType in class jakarta.el.ELResolver