Module org.easymock

Package org.easymock.internal

Class ReflectionUtils

java.lang.Object

org.easymock.internal.ReflectionUtils

public final class ReflectionUtils
extends Object

Helper class for reflection.

Author:

Henri Tremblay

Field Summary

Fields

Modifier and Type	Field	Description
static final Predicate<Method>	NOT_PRIVATE
static final Method	OBJECT_EQUALS
static final Method	OBJECT_FINALIZE
static final Method	OBJECT_HASHCODE
static final Method	OBJECT_TOSTRING

Method Summary

Modifier and Type	Method	Description
static Method	findMethod(Class<?> clazz, String name, Predicate<Method> filter)	Attempt to find a Method on the supplied class with the supplied name and no parameters.
static Method	findMethod(Class<?> clazz, String name, Predicate<Method> filter, Class<?>... paramTypes)	Attempt to find a Method on the supplied class with the supplied name and parameter types.
static <T> Constructor<T>	getConstructor(Class<T> clazz, Object... objs)	Returns a constructor that contains objs as arguments.
static Method	getDeclaredMethod(Class<?> clazz, String name, Class<?>... paramTypes)	Basically calls getDeclaredMethod on a Class but wraps the NoSuchMethodException into a Runtime.
static Set<Method>	getDefaultMethods(Class<?> clazz)	Return all default methods of an interface and it's inherited interface.
static boolean	isClassAvailable(String className)	Tells if a class is available in the classpath

Methods inherited from class java.lang.Object

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

Field Details

NOT_PRIVATE

public static final Predicate<Method> NOT_PRIVATE

OBJECT_EQUALS

public static final Method OBJECT_EQUALS

OBJECT_HASHCODE

public static final Method OBJECT_HASHCODE

OBJECT_TOSTRING

public static final Method OBJECT_TOSTRING

OBJECT_FINALIZE

public static final Method OBJECT_FINALIZE

Method Details

findMethod

public static Method findMethod(Class<?> clazz,
 String name,
 Predicate<Method> filter)

Attempt to find a Method on the supplied class with the supplied name and no parameters. Searches all superclasses up to Object. The filter is used to ignore some kind of methods the caller doesn't want to see returned. In this case they are totally ignored and can't clash with a non-ignored one to cause ambiguity.

Returns null if no Method can be found.

Parameters:

clazz - the class to introspect

name - the name of the method

filter - tells what methods to ignore in the research

Returns:

the Method object, or null if none found

findMethod

public static Method findMethod(Class<?> clazz,
 String name,
 Predicate<Method> filter,
 Class<?>... paramTypes)

Attempt to find a Method on the supplied class with the supplied name and parameter types. Searches all superclasses up to Object. The filter is used to ignore some kind of methods the caller doesn't want to see returned. In this case they are totally ignored and can't clash with a non-ignored one to cause ambiguity.

Returns null if no Method can be found.

Parameters:

clazz - the class to introspect

name - the name of the method

filter - tells what methods to ignore in the research

paramTypes - the parameter types of the method (may be null to indicate any signature)

Returns:

the Method object, or null if none found

getConstructor

public static <T> Constructor<T> getConstructor(Class<T> clazz,
 Object... objs)
                                         throws NoSuchMethodException

Returns a constructor that contains objs as arguments.

We could not do something like clazz.getConstructor(objs.class()) because that would require casting all the passed arguments to the exact parameter types of the desired constructor.

Type Parameters:

T - type of the class searched

Parameters:

clazz - class on which we are searching the constructor

objs - list of arguments of the constructor

Returns:

a constructor with the arguments in objs

Throws:

NoSuchMethodException - when the constructor with args does not exist or is ambiguous

getDeclaredMethod

public static Method getDeclaredMethod(Class<?> clazz,
 String name,
 Class<?>... paramTypes)

Basically calls getDeclaredMethod on a Class but wraps the NoSuchMethodException into a Runtime.

Parameters:

clazz - class on which the getDeclaredMethod is called

name - method name

paramTypes - method parameters

Returns:

the method searched

isClassAvailable

public static boolean isClassAvailable(String className)

Tells if a class is available in the classpath

Parameters:

className - full class name

Returns:

true if the class was found

getDefaultMethods

public static Set<Method> getDefaultMethods(Class<?> clazz)

Return all default methods of an interface and it's inherited interface.

Parameters:

clazz - class for which we want the default method

Returns:

all default methods