org.apache.commons.jexl3.introspection
Interface JexlUberspect

All Known Implementing Classes:

SandboxUberspect, Uberspect

public interface JexlUberspect

'Federated' introspection/reflection interface to allow JEXL introspection behavior to be customized.

Since:

1.0

POJO

static final List<JexlUberspect.PropertyResolver> POJO

A resolver types list tailored for POJOs, favors '.' over '[]'.

MAP

static final List<JexlUberspect.PropertyResolver> MAP

A resolver types list tailored for Maps, favors '[]' over '.'.

JEXL_STRATEGY

static final JexlUberspect.ResolverStrategy JEXL_STRATEGY

The default strategy.

If the operator is '[]' or if the operator is null and the object is a map, use the MAP list of resolvers; Other cases use the POJO list of resolvers.

MAP_STRATEGY

static final JexlUberspect.ResolverStrategy MAP_STRATEGY

The map strategy.

If the operator is '[]' or if the object is a map, use the MAP list of resolvers. Otherwise, use the POJO list of resolvers.

getResolvers

List<JexlUberspect.PropertyResolver> getResolvers(JexlOperator op,
                                                  Object obj)

Applies this uberspect property resolver strategy.

Parameters:

op - the operator

obj - the object

Returns:

the applied strategy resolver list

setClassLoader

void setClassLoader(ClassLoader loader)

Sets the class loader to use.

This increments the version.

Parameters:

loader - the class loader

getVersion

int getVersion()

Gets this uberspect version.

Returns:

the class loader modification count

getConstructor

JexlMethod getConstructor(Object ctorHandle,
                          Object... args)

Returns a class constructor.

Parameters:

ctorHandle - a class or class name

args - constructor arguments

Returns:

a JexlMethod

Since:

3.0

getMethod

JexlMethod getMethod(Object obj,
                     String method,
                     Object... args)

Returns a JexlMethod.

Parameters:

obj - the object

method - the method name

args - method arguments

Returns:

a JexlMethod

getPropertyGet

JexlPropertyGet getPropertyGet(Object obj,
                               Object identifier)

Property getter.

returns a JelPropertySet apropos to an expression like bar.woogie.

Parameters:

obj - the object to get the property from

identifier - property name

Returns:

a JexlPropertyGet or null

getPropertyGet

JexlPropertyGet getPropertyGet(List<JexlUberspect.PropertyResolver> resolvers,
                               Object obj,
                               Object identifier)

Property getter.

Seeks a JexlPropertyGet apropos to an expression like bar.woogie.

See JexlUberspect.ResolverStrategy.apply(JexlOperator, java.lang.Object)

Parameters:

resolvers - the list of property resolvers to try

obj - the object to get the property from

identifier - property name

Returns:

a JexlPropertyGet or null

Since:

3.0

getPropertySet

JexlPropertySet getPropertySet(Object obj,
                               Object identifier,
                               Object arg)

Property setter.

Seeks a JelPropertySet apropos to an expression like foo.bar = "geir".

Parameters:

obj - the object to get the property from.

identifier - property name

arg - value to set

Returns:

a JexlPropertySet or null

getPropertySet

JexlPropertySet getPropertySet(List<JexlUberspect.PropertyResolver> resolvers,
                               Object obj,
                               Object identifier,
                               Object arg)

Property setter.

Seeks a JelPropertySet apropos to an expression like foo.bar = "geir".

See JexlUberspect.ResolverStrategy.apply(JexlOperator, java.lang.Object)

Parameters:

resolvers - the list of property resolvers to try,

obj - the object to get the property from

identifier - property name

arg - value to set

Returns:

a JexlPropertySet or null

Since:

3.0

getIterator

Iterator<?> getIterator(Object obj)

Gets an iterator from an object.

Parameters:

obj - to get the iterator from

Returns:

an iterator over obj or null

getArithmetic

JexlArithmetic.Uberspect getArithmetic(JexlArithmetic arithmetic)

Gets an arithmetic operator resolver for a given arithmetic instance.

Parameters:

arithmetic - the arithmetic instance

Returns:

the arithmetic uberspect or null if no operator method were overridden

Since:

3.0