py4j.reflection

Class ReflectionEngine

java.lang.Object

py4j.reflection.ReflectionEngine

public class ReflectionEngine
extends Object

The reflection engine is responsible for accessing the classes, the instances and members in a JVM.

Author:

Barthelemy Dagenais

Field Summary

Fields

Modifier and Type	Field and Description
static int	cacheSize
static Object	RETURN_VOID

Constructor Summary

Constructors

Constructor and Description
ReflectionEngine()

Method Summary

Modifier and Type	Method and Description
Object	createArray(String fqn, int[] dimensions)
Class<?>	getClass(Class<?> clazz, String name)
MethodInvoker	getConstructor(Class<?> clazz, Class<?>[] parameters)
MethodInvoker	getConstructor(String classFQN, Object[] parameters)
Field	getField(Class<?> clazz, String name)
Field	getField(Object obj, String name)
Field	getField(String classFQN, String name)
Object	getFieldValue(Object obj, Field field) Wrapper around Field.get
Method	getMethod(Class<?> clazz, String name)
MethodInvoker	getMethod(Class<?> clazz, String name, Class<?>[] parameters)
MethodInvoker	getMethod(Object object, String name, Object[] parameters)
MethodInvoker	getMethod(String classFQN, String name, Object[] parameters)
String[]	getPublicFieldNames(Object obj) Retrieve the names of all the public fields in the obj
String[]	getPublicMethodNames(Object obj) Retrieve the names of all the public methods in the obj
String[]	getPublicStaticClassNames(Class<?> clazz) Retrieve the names of all the public static classes in the clazz
String[]	getPublicStaticFieldNames(Class<?> clazz) Retrieve the names of all the public static fields in the clazz
String[]	getPublicStaticMethodNames(Class<?> clazz) Retrieve the names of all the public static methods in the clazz
String[]	getPublicStaticNames(Class<?> clazz) Retrieve the names of all the public static fields, methods and classes in the clazz
Object	invoke(Object object, MethodInvoker invoker, Object[] parameters)
void	setFieldValue(Object obj, Field field, Object value) Wrapper around Field.set

Methods inherited from class java.lang.Object

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

Field Detail

cacheSize

public static final int cacheSize

See Also:

Constant Field Values

RETURN_VOID

public static final Object RETURN_VOID

Constructor Detail

ReflectionEngine

public ReflectionEngine()

Method Detail

createArray

public Object createArray(String fqn,
                          int[] dimensions)

getClass

public Class<?> getClass(Class<?> clazz,
                         String name)

getConstructor

public MethodInvoker getConstructor(Class<?> clazz,
                                    Class<?>[] parameters)

getConstructor

public MethodInvoker getConstructor(String classFQN,
                                    Object[] parameters)

getField

public Field getField(Class<?> clazz,
                      String name)

Parameters:

clazz -

name -

Returns:

The field or null if a field with this name does not exist in this class or in its hierarchy.

getField

public Field getField(Object obj,
                      String name)

Parameters:

obj -

name -

Returns:

The field or null if a field with this name does not exist in the class of this object or in its hierarchy.

getField

public Field getField(String classFQN,
                      String name)

getFieldValue

public Object getFieldValue(Object obj,
                            Field field)

Wrapper around Field.get

Parameters:

obj -

field -

Returns:

getMethod

public Method getMethod(Class<?> clazz,
                        String name)

getMethod

public MethodInvoker getMethod(Class<?> clazz,
                               String name,
                               Class<?>[] parameters)

getMethod

public MethodInvoker getMethod(Object object,
                               String name,
                               Object[] parameters)

getMethod

public MethodInvoker getMethod(String classFQN,
                               String name,
                               Object[] parameters)

invoke

public Object invoke(Object object,
                     MethodInvoker invoker,
                     Object[] parameters)

setFieldValue

public void setFieldValue(Object obj,
                          Field field,
                          Object value)

Wrapper around Field.set

Parameters:

obj -

field -

value -

getPublicMethodNames

public String[] getPublicMethodNames(Object obj)

Retrieve the names of all the public methods in the obj

Parameters:

obj - the object to inspect

Returns:

list of all the names of public methods in obj

getPublicFieldNames

public String[] getPublicFieldNames(Object obj)

Retrieve the names of all the public fields in the obj

Parameters:

obj - the object to inspect

Returns:

list of all the names of public fields in obj

getPublicStaticFieldNames

public String[] getPublicStaticFieldNames(Class<?> clazz)

Retrieve the names of all the public static fields in the clazz

Parameters:

clazz - the object to inspect

Returns:

list of all the names of public statics

getPublicStaticMethodNames

public String[] getPublicStaticMethodNames(Class<?> clazz)

Retrieve the names of all the public static methods in the clazz

Parameters:

clazz - the object to inspect

Returns:

list of all the names of public statics

getPublicStaticClassNames

public String[] getPublicStaticClassNames(Class<?> clazz)

Retrieve the names of all the public static classes in the clazz

Parameters:

clazz - the object to inspect

Returns:

list of all the names of public statics

getPublicStaticNames

public String[] getPublicStaticNames(Class<?> clazz)

Retrieve the names of all the public static fields, methods and classes in the clazz

Parameters:

clazz - the object to inspect

Returns:

list of all the names of public statics