org.mule.metadata.message.api.el

Interface ExpressionLanguageMetadataTypeResolver

public interface ExpressionLanguageMetadataTypeResolver

Resolves the metadata for a specific expression language.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	ExpressionLanguageMetadataTypeResolver.MessageCallback Callback from the resolver
static class	ExpressionLanguageMetadataTypeResolver.MessageLocation Represents a message location
static class	ExpressionLanguageMetadataTypeResolver.MessagePosition A position with the line , column and offset in a document

Method Summary

Modifier and Type	Method and Description
void	getInputType(String expression, MetadataType output, MuleEventMetadataTypeBuilder builder, ExpressionLanguageMetadataTypeResolver.MessageCallback callback) Infers the expected input mule event type MuleEventMetadataType for specified output type with the given script.
static ExpressionLanguageMetadataTypeResolver	getInstance() Returns the default instance for this Type Resolver
static ExpressionLanguageMetadataTypeResolver	getInstance(ClassLoader loader)
MetadataType	getMetadataFromSample(InputStream sample, Map<String,Object> readerProperties, String mimeType) Infers the metadata out of a sample data
MetadataType	getOutputType(TypeBindings typeBindings, String expression, ExpressionLanguageMetadataTypeResolver.MessageCallback callback) Returns the result type expression when invoked with the given TypeBindings.
MetadataType	getOutputType(TypeBindings typeBindings, String expression, String outputMimeType, ExpressionLanguageMetadataTypeResolver.MessageCallback callback) Returns the result type expression when invoked with the given TypeBindings.
boolean	isAssignable(MetadataType assignment, MetadataType expected, ExpressionLanguageMetadataTypeResolver.MessageCallback callback) Returns if the assignment type can be assigned to the expected type
Map<String,MetadataType>	resolveAssignment(MetadataType assignment, MetadataType expected, ExpressionLanguageMetadataTypeResolver.MessageCallback callback) Returns the substitution that needs to be done in order for this two types can be assigned
MetadataType	substitute(MetadataType assignment, Map<String,MetadataType> substitution) Returns a new type with the substitution being applied
MetadataType	unify(List<MetadataType> metadataTypes) Unify all the specified types into one type.

Method Detail

getInputType

void getInputType(String expression,
                  MetadataType output,
                  MuleEventMetadataTypeBuilder builder,
                  ExpressionLanguageMetadataTypeResolver.MessageCallback callback)

Infers the expected input mule event type MuleEventMetadataType for specified output type with the given script.

Parameters:

expression - The scripting text.

output - The expected output type

builder - The builder to be used to build the event type

callback - The callback

getOutputType

MetadataType getOutputType(TypeBindings typeBindings,
                           String expression,
                           ExpressionLanguageMetadataTypeResolver.MessageCallback callback)

Returns the result type expression when invoked with the given TypeBindings.

Parameters:

typeBindings - The script bindings

expression - The scripting text.

callback - The callback

Returns:

The return type of the expression.

getOutputType

MetadataType getOutputType(TypeBindings typeBindings,
                           String expression,
                           String outputMimeType,
                           ExpressionLanguageMetadataTypeResolver.MessageCallback callback)

Returns the result type expression when invoked with the given TypeBindings.

Parameters:

typeBindings - The script bindings

expression - The scripting text.

outputMimeType - The output mimeType of the expression

callback - The callback

Returns:

The return type of the expression.

getMetadataFromSample

MetadataType getMetadataFromSample(InputStream sample,
                                   Map<String,Object> readerProperties,
                                   String mimeType)

Infers the metadata out of a sample data

Parameters:

sample - The sample data to be use

readerProperties - The configuration properties to read the sample data

mimeType - The mimeType of the sample data

Returns:

The infered MetadataType

isAssignable

boolean isAssignable(MetadataType assignment,
                     MetadataType expected,
                     ExpressionLanguageMetadataTypeResolver.MessageCallback callback)

Returns if the assignment type can be assigned to the expected type

Parameters:

assignment - The type to be assigned

expected - The expected type

callback - Callback for error messages. All the reasons of why it was not able to assign

Returns:

True if it can be assign

resolveAssignment

Map<String,MetadataType> resolveAssignment(MetadataType assignment,
                                           MetadataType expected,
                                           ExpressionLanguageMetadataTypeResolver.MessageCallback callback)

Returns the substitution that needs to be done in order for this two types can be assigned

Parameters:

assignment - The assignment type

expected - The expected type

callback - The callback for errors and warnings

Returns:

The substitution

substitute

MetadataType substitute(MetadataType assignment,
                        Map<String,MetadataType> substitution)

Returns a new type with the substitution being applied

Parameters:

assignment - The type to be substituted

substitution - The substitution

Returns:

The new type

unify

MetadataType unify(List<MetadataType> metadataTypes)

Unify all the specified types into one type. It will remove duplications and return a UnionType only if required

Parameters:

metadataTypes - The types to be unified

Returns:

The new type

getInstance

static ExpressionLanguageMetadataTypeResolver getInstance()

Returns the default instance for this Type Resolver

Returns:

The default instance

getInstance

static ExpressionLanguageMetadataTypeResolver getInstance(ClassLoader loader)