com.google.instrumentation.common

Class Provider

java.lang.Object

com.google.instrumentation.common.Provider

public final class Provider
extends Object

Instrumentation specific service provider mechanism.

 // Initialize a static variable using reflection.
 static final Foo foo = Provider.newInstance("Foo", new NoopFoo());
 

Constructor Summary

Constructors

Constructor and Description
Provider()

Method Summary

Modifier and Type	Method and Description
static <T> T	createInstance(Class<?> rawClass, Class<T> superclass) Tries to create an instance of the given rawClass as a subclass of the given superclass.
static <T> ClassLoader	getCorrectClassLoader(Class<T> superClass) Get the correct ClassLoader that must be used when loading using reflection.
static <T> T	newInstance(String name, T defaultValue) Returns a new instance of the class specified with name by invoking the empty-argument constructor via reflections.

Methods inherited from class java.lang.Object

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

Constructor Detail

Provider

public Provider()

Method Detail

newInstance

@Nullable
public static <T> T newInstance(String name,
                                          @Nullable
                                          T defaultValue)

Returns a new instance of the class specified with name by invoking the empty-argument constructor via reflections. If the specified class is not found, the defaultValue is returned.

createInstance

public static <T> T createInstance(Class<?> rawClass,
                                   Class<T> superclass)

Tries to create an instance of the given rawClass as a subclass of the given superclass.

Parameters:

rawClass - The class that is initialized.

superclass - The initialized class must be a subclass of this.

Returns:

an instance of the class given rawClass which is a subclass of the given superclass.

Throws:

ServiceConfigurationError - if any error happens.

getCorrectClassLoader

public static <T> ClassLoader getCorrectClassLoader(Class<T> superClass)

Get the correct ClassLoader that must be used when loading using reflection.

Returns:

The correct ClassLoader that must be used when loading using reflection.