Package com.intergral.deep.agent.api.reflection

Interface IReflection

All Known Implementing Classes:

Java9ReflectionImpl, ReflectionImpl

public interface IReflection

This type exposes helpful reflection methods.

Method Summary

Modifier and Type	Method	Description
<T> T	callConstructor(Constructor<?> constructor, Object... args)	Call a constructor with the arguments.
<T> T	callField(Object target, Field field)	Call a field on a target.
<T> T	callMethod(Object target, String methodName, Object... args)	Call a method on the target object.
Constructor<?>	findConstructor(Class<?> clazz, Class<?>... args)	Find a constructor on the given class.
Method	findMethod(Class<?> clazz, String methodName, Class<?>... argTypes)	Scan the hierarchy of the input class for a method with the given name.
Field	getField(Object target, String fieldName)	Get a filed from the target.
Iterator<Field>	getFieldIterator(Class<?> clazz)	Get an iterator that will iterator over all the available fields on the given class.
<T> T	getFieldValue(Object target, String fieldName)	Get a field from an object.
Set<String>	getModifiers(Field field)	Get the modifier names of a field.
boolean	setAccessible(Class<?> clazz, Constructor<?> constructor)	Set the constructor as accessible.
boolean	setAccessible(Class<?> clazz, Field field)	Set the field as accessible.
boolean	setAccessible(Class<?> clazz, Method method)	Set the method as accessible.

Method Detail

setAccessible

boolean setAccessible(Class<?> clazz,
                      Field field)

Set the field as accessible.

Parameters:

clazz - the clazz the field is on

field - the field to access

Returns:

could we complete the operation

See Also:

Field.setAccessible(boolean)

setAccessible

boolean setAccessible(Class<?> clazz,
                      Method method)

Set the method as accessible.

Parameters:

clazz - the clazz the field is on

method - the method to access

Returns:

could we complete the operation

See Also:

Method.setAccessible(boolean)

setAccessible

boolean setAccessible(Class<?> clazz,
                      Constructor<?> constructor)

Set the constructor as accessible.

Parameters:

clazz - the clazz the field is on

constructor - the constructor to set

Returns:

could we complete the operation

See Also:

Constructor.setAccessible(boolean)

callMethod

<T> T callMethod(Object target,
                 String methodName,
                 Object... args)

Call a method on the target object.

This will look for the method using findMethod(Class, String, Class[]) using the input arguments as the argument types of the method. The method will then be invoked on the target argument.

Type Parameters:

T - the type of the response

Parameters:

target - the target instance to call the method on

methodName - the name of the method to call

args - the arguments to the method

Returns:

the response of the method

findMethod

Method findMethod(Class<?> clazz,
                  String methodName,
                  Class<?>... argTypes)

Scan the hierarchy of the input class for a method with the given name. This will scan declared methods and methods, as well as stepping up the super class.

Parameters:

clazz - the class to start the scan on

methodName - the name of the method to look for

argTypes - the argument types in the method signature

Returns:

the discovered method or null

getField

Field getField(Object target,
               String fieldName)

Get a filed from the target.

Parameters:

target - the target instance to look on.

fieldName - the name of the field to get

Returns:

the field, or null

getFieldValue

<T> T getFieldValue(Object target,
                    String fieldName)

Get a field from an object.

Type Parameters:

T - the type to return as

Parameters:

target - the object to look at

fieldName - the field name to look for

Returns:

the field as T, else null

getFieldIterator

Iterator<Field> getFieldIterator(Class<?> clazz)

Get an iterator that will iterator over all the available fields on the given class.

Parameters:

clazz - the class to scan

Returns:

the iterator for the fields

callField

<T> T callField(Object target,
                Field field)

Call a field on a target.

Type Parameters:

T - the type of the return

Parameters:

target - the object to get the field from

field - the field to call

Returns:

the value of the field

getModifiers

Set<String> getModifiers(Field field)

Get the modifier names of a field.

Parameters:

field - the field to look at

Returns:

a set of strings that represent the modifiers.

findConstructor

Constructor<?> findConstructor(Class<?> clazz,
                               Class<?>... args)

Find a constructor on the given class.

Parameters:

clazz - the class to look on

args - the arguments for the constructor

Returns:

the constructor or null

callConstructor

<T> T callConstructor(Constructor<?> constructor,
                      Object... args)
               throws DeepRuntimeException

Call a constructor with the arguments.

Type Parameters:

T - the type of the return

Parameters:

constructor - the constructor to call

args - the arguments for the constructor

Returns:

the new object, or null

Throws:

DeepRuntimeException - if we could not create a new object