Package org.assertj.core.util.introspection

Class MethodSupport

java.lang.Object

org.assertj.core.util.introspection.MethodSupport

public class MethodSupport
extends Object

Utility class for reflective method invocation.

Author:

Michał Piotrkowski

Field Summary

Fields

Modifier and Type	Field	Description
private static String	METHOD_HAS_NO_RETURN_VALUE
private static String	METHOD_NOT_FOUND

Constructor Summary

Constructors

Constructor	Description
MethodSupport()

Method Summary

Modifier and Type	Method	Description
private static void	assertHasReturnType(Class<?> itemClass, Method method)
private static Method	findMethod(String methodName, Class<?> itemClass)
private static Object	invokeMethod(Object item, Method method)
static Object	methodResultFor(Object instance, String methodName)	Returns result of given method invocation on provided object.
private static IllegalArgumentException	prepareMethodNotFoundException(String methodName, Class<?> itemClass, Exception cause)

Methods inherited from class java.lang.Object

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

Field Detail

METHOD_HAS_NO_RETURN_VALUE

private static final String METHOD_HAS_NO_RETURN_VALUE

See Also:

Constant Field Values

METHOD_NOT_FOUND

private static final String METHOD_NOT_FOUND

See Also:

Constant Field Values

Constructor Detail

MethodSupport

public MethodSupport()

Method Detail

methodResultFor

public static Object methodResultFor(Object instance,
                                     String methodName)

Returns result of given method invocation on provided object.

Following requirements have to be met to extract method results:

• method has to be public,
• method cannot accept any arguments,
• method cannot return void.

Parameters:

instance - object on which

methodName - name of method to be invoked

Returns:

result of method invocation

Throws:

IllegalArgumentException - if method does not exist or is not public, method returns void or method accepts any argument

invokeMethod

private static Object invokeMethod(Object item,
                                   Method method)

findMethod

private static Method findMethod(String methodName,
                                 Class<?> itemClass)

prepareMethodNotFoundException

private static IllegalArgumentException prepareMethodNotFoundException(String methodName,
                                                                       Class<?> itemClass,
                                                                       Exception cause)

assertHasReturnType

private static void assertHasReturnType(Class<?> itemClass,
                                        Method method)