io.opentracing.contrib.common

Class Classes

java.lang.Object

io.opentracing.contrib.common.Classes

public final class Classes
extends Object

Method Summary

Modifier and Type	Method and Description
static Class<?>[]	getAllInterfaces(Class<?> cls) Returns all interfaces implemented by the class or interface represented by the specified class.
static Method	getDeclaredMethod(Class<?> cls, String name, Class<?>... parameterTypes) Returns a Method object that reflects the specified declared method of the class or interface represented by cls (excluding inherited methods), or null if the method is not found.
static Method	getDeclaredMethodDeep(Class<?> cls, String name, Class<?>... parameterTypes) Returns a Method object that reflects the specified declared method of the class or interface represented by cls (including inherited methods), or null if the method is not found.

Methods inherited from class java.lang.Object

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

Method Detail

getAllInterfaces

public static Class<?>[] getAllInterfaces(Class<?> cls)

Returns all interfaces implemented by the class or interface represented by the specified class. This method differentiates itself from Class.getInterfaces() by returning all interfaces (full depth and breadth) instead of just the interfaces directly implemented by the class.

Parameters:

cls - The class.

Returns:

All interfaces implemented by the class or interface represented by the specified class.

Throws:

NullPointerException - If cls is null.

getDeclaredMethod

public static Method getDeclaredMethod(Class<?> cls,
                                       String name,
                                       Class<?>... parameterTypes)

Returns a Method object that reflects the specified declared method of the class or interface represented by cls (excluding inherited methods), or null if the method is not found.

Declared methods include public, protected, default (package) access, and private visibility.

The name parameter is a String that specifies the simple name of the desired method, and the parameterTypes parameter is an array of Class objects that identify the method's formal parameter types, in declared order. If more than one method with the same parameter types is declared in a class, and one of these methods has a return type that is more specific than any of the others, that method is returned; otherwise one of the methods is chosen arbitrarily. If the name is "<init>" or "<clinit>" this method returns null. If this Class object represents an array type, then this method does not find the clone() method.

This method differentiates itself from Class.getDeclaredMethod(String,Class...) by returning null when a method is not found, instead of throwing NoSuchMethodException.

Parameters:

cls - The class in which to find the declared method.

name - The simple name of the method.

parameterTypes - The parameter array.

Returns:

A Method object that reflects the specified declared method of the class or interface represented by cls (excluding inherited methods), or null if the method is not found.

Throws:

NullPointerException - If cls or name is null.

getDeclaredMethodDeep

public static Method getDeclaredMethodDeep(Class<?> cls,
                                           String name,
                                           Class<?>... parameterTypes)

Returns a Method object that reflects the specified declared method of the class or interface represented by cls (including inherited methods), or null if the method is not found.

Declared methods include public, protected, default (package) access, and private visibility.

The name parameter is a String that specifies the simple name of the desired method, and the parameterTypes parameter is an array of Class objects that identify the method's formal parameter types, in declared order. If more than one method with the same parameter types is declared in a class, and one of these methods has a return type that is more specific than any of the others, that method is returned; otherwise one of the methods is chosen arbitrarily. If the name is "<init>" or "<clinit>" this method returns null. If this Class object represents an array type, then this method does not find the clone() method.

This method differentiates itself from Class.getDeclaredMethod(String,Class...) by returning null when a method is not found, instead of throwing NoSuchMethodException.

Parameters:

cls - The class in which to find the declared method.

name - The simple name of the method.

parameterTypes - The parameter array.

Returns:

A Method object that reflects the specified declared method of the class or interface represented by cls (including inherited methods), or null if the method is not found.

Throws:

NullPointerException - If cls or name is null.