org.mule.runtime.core.el

Class ExpressionLanguageAdaptorHandler

java.lang.Object

org.mule.runtime.core.el.ExpressionLanguageAdaptorHandler

All Implemented Interfaces:

ExpressionLanguageAdaptor, ExtendedExpressionLanguageAdaptor

public class ExpressionLanguageAdaptorHandler
extends Object
implements ExtendedExpressionLanguageAdaptor

Implementation of an ExtendedExpressionLanguageAdaptor which adapts MVEL and DW together, deciding via a prefix whether one or the other should be call. It will allow MVEL and DW to be used together in compatibility mode.

Since:

4.0

Constructor Summary

Constructors

Constructor and Description
ExpressionLanguageAdaptorHandler(DataWeaveExpressionLanguageAdaptor defaultExtendedExpressionLanguage, MVELExpressionLanguage mvelExpressionLanguage)

Method Summary

Modifier and Type	Method and Description
void	addGlobalBindings(org.mule.runtime.api.el.BindingContext bindingContext) Registers the given BindingContext entries as globals.
void	enrich(String expression, Event event, Event.Builder eventBuilder, FlowConstruct flowConstruct, Object object) Enriches an event.
void	enrich(String expression, Event event, Event.Builder eventBuilder, FlowConstruct flowConstruct, org.mule.runtime.api.metadata.TypedValue value) Enriches an event using a typed value.
org.mule.runtime.api.metadata.TypedValue	evaluate(String expression, org.mule.runtime.api.metadata.DataType expectedOutputType, Event event, org.mule.runtime.api.el.BindingContext context) Evaluates an expression according to a given BindingContext and outputs .
org.mule.runtime.api.metadata.TypedValue	evaluate(String expression, org.mule.runtime.api.metadata.DataType expectedOutputType, Event event, FlowConstruct flowConstruct, org.mule.runtime.api.el.BindingContext context, boolean failOnNull) Evaluates an expression according to a given BindingContext, an Event and a FlowConstruct.
org.mule.runtime.api.metadata.TypedValue	evaluate(String expression, Event event, org.mule.runtime.api.el.BindingContext context) Evaluates an expression according to a given BindingContext.
org.mule.runtime.api.metadata.TypedValue	evaluate(String expression, Event event, Event.Builder eventBuilder, FlowConstruct flowConstruct, org.mule.runtime.api.el.BindingContext bindingContext) Execute the expression returning the result.
org.mule.runtime.api.metadata.TypedValue	evaluate(String expression, Event event, FlowConstruct flowConstruct, org.mule.runtime.api.el.BindingContext bindingContext) Evaluates an expression according to a given BindingContext, an Event and a FlowConstruct.
boolean	isMelDefault()
Iterator<org.mule.runtime.api.metadata.TypedValue<?>>	split(String expression, Event event, org.mule.runtime.api.el.BindingContext bindingContext) Splits using the specified expression and group it with the batch size.
Iterator<org.mule.runtime.api.metadata.TypedValue<?>>	split(String expression, Event event, FlowConstruct flowConstruct, org.mule.runtime.api.el.BindingContext bindingContext) Splits using the specified expression and group it with the batch size.
org.mule.runtime.api.el.ValidationResult	validate(String expression) Verifies whether an expression is valid or not syntactically.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionLanguageAdaptorHandler

public ExpressionLanguageAdaptorHandler(DataWeaveExpressionLanguageAdaptor defaultExtendedExpressionLanguage,
                                        MVELExpressionLanguage mvelExpressionLanguage)

Method Detail

isMelDefault

public boolean isMelDefault()

addGlobalBindings

public void addGlobalBindings(org.mule.runtime.api.el.BindingContext bindingContext)

Description copied from interface: ExpressionLanguageAdaptor

Registers the given BindingContext entries as globals. Notice globals cannot be removed once registered, only overwritten by the registration of a binding with the same identifier. Implementations should be thread safe to avoid race conditions between registration and expression evaluation.

Specified by:

addGlobalBindings in interface ExpressionLanguageAdaptor

Parameters:

bindingContext - the context to register

evaluate

public org.mule.runtime.api.metadata.TypedValue evaluate(String expression,
                                                         Event event,
                                                         org.mule.runtime.api.el.BindingContext context)
                                                  throws ExpressionRuntimeException

Description copied from interface: ExpressionLanguageAdaptor

Evaluates an expression according to a given BindingContext.

Specified by:

evaluate in interface ExpressionLanguageAdaptor

Parameters:

expression - the expression to be executed

event - the current event being processed

Returns:

the result of execution of the expression.

Throws:

ExpressionRuntimeException - if a problem occurs evaluating the expression

evaluate

public org.mule.runtime.api.metadata.TypedValue evaluate(String expression,
                                                         org.mule.runtime.api.metadata.DataType expectedOutputType,
                                                         Event event,
                                                         org.mule.runtime.api.el.BindingContext context)
                                                  throws ExpressionRuntimeException

Description copied from interface: ExpressionLanguageAdaptor

Evaluates an expression according to a given BindingContext and outputs .

Specified by:

evaluate in interface ExpressionLanguageAdaptor

Parameters:

expression - the expression to be executed

expectedOutputType - the expected output type so that automatic conversion can be performed for the resulting value type.

event - the current event being processed

Returns:

the result of execution of the expression.

Throws:

ExpressionRuntimeException - if a problem occurs evaluating the expression

evaluate

public org.mule.runtime.api.metadata.TypedValue evaluate(String expression,
                                                         org.mule.runtime.api.metadata.DataType expectedOutputType,
                                                         Event event,
                                                         FlowConstruct flowConstruct,
                                                         org.mule.runtime.api.el.BindingContext context,
                                                         boolean failOnNull)
                                                  throws ExpressionRuntimeException

Description copied from interface: ExpressionLanguageAdaptor

Evaluates an expression according to a given BindingContext, an Event and a FlowConstruct.

Specified by:

evaluate in interface ExpressionLanguageAdaptor

Parameters:

expression - the expression to be executed

expectedOutputType - the expected output type so that automatic conversion can be performed for the resulting value type.

event - the current event being processed

flowConstruct - the flow where the event is being processed

context - the bindings to consider

failOnNull - indicates if should fail if the evaluation result is null

Returns:

the result of execution of the expression.

Throws:

ExpressionRuntimeException - if a problem occurs evaluating the expression

evaluate

public org.mule.runtime.api.metadata.TypedValue evaluate(String expression,
                                                         Event event,
                                                         FlowConstruct flowConstruct,
                                                         org.mule.runtime.api.el.BindingContext bindingContext)
                                                  throws ExpressionRuntimeException

Description copied from interface: ExpressionLanguageAdaptor

Evaluates an expression according to a given BindingContext, an Event and a FlowConstruct.

Specified by:

evaluate in interface ExpressionLanguageAdaptor

Parameters:

expression - the expression to be executed

event - the current event being processed

flowConstruct - the flow where the event is being processed

bindingContext - the bindings to consider

Returns:

the result of execution of the expression.

Throws:

ExpressionRuntimeException - if a problem occurs evaluating the expression

validate

public org.mule.runtime.api.el.ValidationResult validate(String expression)

Description copied from interface: ExpressionLanguageAdaptor

Verifies whether an expression is valid or not syntactically.

Specified by:

validate in interface ExpressionLanguageAdaptor

Parameters:

expression - to be validated

Returns:

a ValidationResult indicating whether the validation was successful or not

evaluate

public org.mule.runtime.api.metadata.TypedValue evaluate(String expression,
                                                         Event event,
                                                         Event.Builder eventBuilder,
                                                         FlowConstruct flowConstruct,
                                                         org.mule.runtime.api.el.BindingContext bindingContext)
                                                  throws ExpressionRuntimeException

Description copied from interface: ExtendedExpressionLanguageAdaptor

Execute the expression returning the result. The expression will be executed with MuleEvent context, meaning the expression language implementation should provided access to the message. A Map of variables can be provided that will be able to the expression when executed. Variable provided in the map will only be available if there are no conflict with context variables provided by the expression language implementation. This version of evaluate allows Event or InternalMessage mutation performed within the expression to be maintained post-evaluation via the use of a result Event.Builder which should be created from the original event before being passed and then used to construct the post-evaluation event.

Specified by:

evaluate in interface ExtendedExpressionLanguageAdaptor

Parameters:

expression - the expression to be executed

event - the current event being processed

eventBuilder - event builder instance used to mutate the current message or event.

flowConstruct - the flow where the event is being processed

bindingContext - the bindings to consider

Returns:

the result of execution of the expression.

Throws:

ExpressionRuntimeException - if a problem occurs evaluating the expression

enrich

public void enrich(String expression,
                   Event event,
                   Event.Builder eventBuilder,
                   FlowConstruct flowConstruct,
                   Object object)

Description copied from interface: ExtendedExpressionLanguageAdaptor

Enriches an event. This version of enrich allows Event or InternalMessage mutation performed within the expression to be maintained post-evaluation via the use of a result Event.Builder which should be created from the original event before being passed and then used to construct the post-evaluation event.

Specified by:

enrich in interface ExtendedExpressionLanguageAdaptor

Parameters:

expression - a single expression i.e. header://foo that defines how the message should be enriched

event - The event to be enriched

eventBuilder - event builder instance used to mutate the current message or event.

flowConstruct - the flow where the event is being processed

object - The object used for enrichment

enrich

public void enrich(String expression,
                   Event event,
                   Event.Builder eventBuilder,
                   FlowConstruct flowConstruct,
                   org.mule.runtime.api.metadata.TypedValue value)

Description copied from interface: ExtendedExpressionLanguageAdaptor

Enriches an event using a typed value. This version of enrich allows Event or InternalMessage mutation performed within the expression to be maintained post-evaluation via the use of a result Event.Builder which should be created from the original event before being passed and then used to construct the post-evaluation event.

Specified by:

enrich in interface ExtendedExpressionLanguageAdaptor

Parameters:

expression - a single expression i.e. header://foo that defines how the message should be enriched

event - The event to be enriched

eventBuilder - event builder instance used to mutate the current message or event.

flowConstruct - the flow where the event is being processed

value - The typed value used for enrichment

split

public Iterator<org.mule.runtime.api.metadata.TypedValue<?>> split(String expression,
                                                                   Event event,
                                                                   FlowConstruct flowConstruct,
                                                                   org.mule.runtime.api.el.BindingContext bindingContext)
                                                            throws ExpressionRuntimeException

Description copied from interface: ExpressionLanguageAdaptor

Splits using the specified expression and group it with the batch size. If batch size is less or equals to zero then no batching is done. The expression should return a collection of elements.

Specified by:

split in interface ExpressionLanguageAdaptor

Parameters:

expression - the expression to be executed

event - the current event being processed

flowConstruct - the flow where the event is being processed

bindingContext - the bindings to consider

Returns:

the result of execution of the expression.

Throws:

ExpressionRuntimeException - if a problem occurs evaluating the expression

split

public Iterator<org.mule.runtime.api.metadata.TypedValue<?>> split(String expression,
                                                                   Event event,
                                                                   org.mule.runtime.api.el.BindingContext bindingContext)
                                                            throws ExpressionRuntimeException

Description copied from interface: ExpressionLanguageAdaptor

Splits using the specified expression and group it with the batch size. If batch size is less or equals to zero then no batching is done. The expression should return a collection of elements.

Specified by:

split in interface ExpressionLanguageAdaptor

Parameters:

expression - the expression to be executed

event - the current event being processed

bindingContext - the bindings to consider

Returns:

the result of execution of the expression.

Throws:

ExpressionRuntimeException - if a problem occurs evaluating the expression