Package com.yourkit.probes

Class ReflectionUtil

java.lang.Object

com.yourkit.probes.ReflectionUtil

public class ReflectionUtil
extends Object

Provide reflection utility methods for probes.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	OBJECT_SIG
static final String	SIG_SEP
static final String	STRING_SIG

Constructor Summary

Constructors

Constructor	Description
ReflectionUtil()

Method Summary

Modifier and Type	Method	Description
static Object	callMethod0(Class<?> aClass, Object object, String methodName, CallStatus callStatus)	Invokes instance or static method with no parameters and any return type.
static Object	callMethod0(Object object, String methodName)	Invokes instance method with no parameters and any return type.
static Object	callMethod0(Object object, String methodName, CallStatus callStatus)	Invokes instance method with no parameters and any return type.
static Object	callMethod1(Class<?> aClass, Object object, String methodNameAndSignature, Object arg1, CallStatus callStatus)	Invokes a method with one parameter and any return type.
static long	getFieldPrimValue(Class<?> aClass, Object object, String fieldName)	Gets the value of a field of primitive type, either instance or static.
static long	getFieldPrimValue(Object object, String fieldName)	Gets the value of an instance field of primitive type.
static <T> T	getFieldValue(Class<?> aClass, Object object, String fieldName)	Gets value of a reference field, either instance or static
static <T> T	getFieldValue(Class<?> aClass, Object object, String fieldName, CallStatus callStatus)	Gets value of a reference field, either instance or static
static <T> T	getFieldValue(Object object, String fieldName)
static void	setFieldObjectValue(Class<?> aClass, Object object, String fieldName, Object value)	Sets value to a reference field, either instance or static

Methods inherited from class java.lang.Object

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

Field Details

SIG_SEP

public static final String SIG_SEP

See Also:

• Constant Field Values

OBJECT_SIG

public static final String OBJECT_SIG

See Also:

• Constant Field Values

STRING_SIG

public static final String STRING_SIG

See Also:

• Constant Field Values

Constructor Details

ReflectionUtil

public ReflectionUtil()

Method Details

callMethod0

@Nullable
public static Object callMethod0(@NotNull
 Class<?> aClass,
 @Nullable
 Object object,
 @NotNull
 String methodName,
 @Nullable
 CallStatus callStatus)

Invokes instance or static method with no parameters and any return type.

Parameters:

object - should be NULL for static method

callStatus - if specified, allows to retrieve thrown exception if the call fails

Returns:

the method return value, or NULL if the method has thrown an exception or cannot be called (e.g. does not exist)

callMethod0

@Nullable
public static Object callMethod0(@NotNull
 Object object,
 @NotNull
 String methodName,
 @Nullable
 CallStatus callStatus)

Invokes instance method with no parameters and any return type.

Parameters:

callStatus - if specified, allows to retrieve thrown exception if the call fails

Returns:

the method return value, or NULL if the method has thrown an exception or cannot be called (e.g. does not exist)

callMethod0

@Nullable
public static Object callMethod0(@NotNull
 Object object,
 @NotNull
 String methodName)

Invokes instance method with no parameters and any return type.

Returns:

the method return value, or NULL if the method has thrown an exception or cannot be called (e.g. does not exist)

callMethod1

@Nullable
public static Object callMethod1(@NotNull
 Class<?> aClass,
 @Nullable
 Object object,
 @NotNull
 String methodNameAndSignature,
 @Nullable
 Object arg1,
 @Nullable
 CallStatus callStatus)

Invokes a method with one parameter and any return type.

Parameters:

object - should be NULL for static method

getFieldValue

@Nullable
public static <T> T getFieldValue(@NotNull
 Object object,
 @NotNull
 String fieldName)

getFieldValue

@Nullable
public static <T> T getFieldValue(@NotNull
 Class<?> aClass,
 @Nullable
 Object object,
 @NotNull
 String fieldName,
 @Nullable
 CallStatus callStatus)

Gets value of a reference field, either instance or static

getFieldValue

@Nullable
public static <T> T getFieldValue(@NotNull
 Class<?> aClass,
 @Nullable
 Object object,
 @NotNull
 String fieldName)

Gets value of a reference field, either instance or static

setFieldObjectValue

public static void setFieldObjectValue(@NotNull
 Class<?> aClass,
 @Nullable
 Object object,
 @NotNull
 String fieldName,
 @Nullable
 Object value)

Sets value to a reference field, either instance or static

getFieldPrimValue

public static long getFieldPrimValue(@NotNull
 Class<?> aClass,
 @Nullable
 Object object,
 @NotNull
 String fieldName)

Gets the value of a field of primitive type, either instance or static.

getFieldPrimValue

public static long getFieldPrimValue(@NotNull
 Object object,
 @NotNull
 String fieldName)

Gets the value of an instance field of primitive type.