Class InterpretingELExpressionParser

java.lang.Object

io.micronaut.el.interpreter.InterpretingELExpressionParser

All Implemented Interfaces:

ELExpressionParser

@Internal
public final class InterpretingELExpressionParser
extends Object
implements ELExpressionParser

Creates the expressions that were not compiled at compilation time by parsing them at runtime.

The implementation is registered as a service, so adding this module to the runtime classpath is enough to make jakarta.el.ExpressionFactory accept expression strings that are only known at runtime.

Since:

1.0

Author:

Denis Stepanov

Constructor Summary

Constructors

Constructor	Description
InterpretingELExpressionParser()	Creates a parser using the method executors visible to the context class loader.
InterpretingELExpressionParser(List<ELMethodExecutor> executors)	Creates a parser using the given method executors, instead of the ones the context class loader declares as services.

Method Summary

Modifier and Type	Method	Description
jakarta.el.MethodExpression	createMethodExpression(@Nullable jakarta.el.ELContext context, String expression, Class<?> expectedReturnType, Class<?> @Nullable [] expectedParamTypes)	Parses a method expression.
jakarta.el.ValueExpression	createValueExpression(@Nullable jakarta.el.ELContext context, String expression, Class<?> expectedType)	Parses a value expression.

Methods inherited from class Object

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

Constructor Details

InterpretingELExpressionParser

public InterpretingELExpressionParser()

Creates a parser using the method executors visible to the context class loader.

InterpretingELExpressionParser

public InterpretingELExpressionParser(List<ELMethodExecutor> executors)

Creates a parser using the given method executors, instead of the ones the context class loader declares as services.

This is how an application registers its own executor programmatically, and the only way it can leave one out: a deployment that must not reach a method reflectively passes the executors it wants, rather than relying on the reflective one being absent from the classpath.

Parameters:

executors - The executors, in any order; they are consulted following the Ordered contract

Method Details

createValueExpression

public jakarta.el.ValueExpression createValueExpression(@Nullable jakarta.el.ELContext context,
 String expression,
 Class<?> expectedType)

Description copied from interface: ELExpressionParser

Parses a value expression.

Specified by:

createValueExpression in interface ELExpressionParser

Parameters:

context - The context the expression is created for, can be null

expression - The expression

expectedType - The expected type of the evaluation result

Returns:

The value expression

createMethodExpression

public jakarta.el.MethodExpression createMethodExpression(@Nullable jakarta.el.ELContext context,
 String expression,
 Class<?> expectedReturnType,
 Class<?> @Nullable [] expectedParamTypes)

Description copied from interface: ELExpressionParser

Parses a method expression.

Specified by:

createMethodExpression in interface ELExpressionParser

Parameters:

context - The context the expression is created for, can be null

expression - The expression

expectedReturnType - The expected return type

expectedParamTypes - The expected parameter types

Returns:

The method expression