org.apache.tapestry5.plastic
Class PlasticManager

java.lang.Object
  org.apache.tapestry5.plastic.PlasticManager

All Implemented Interfaces:

PlasticClassListenerHub

public class PlasticManager
extends Object
implements PlasticClassListenerHub

Manages the internal class loaders and other logics necessary to load and transform existing classes, or to create new classes dynamically at runtime. New instances are instantiates using withClassLoader(ClassLoader) or withContextClassLoader(), then configuring the returned options object before invoking PlasticManager.PlasticManagerBuilder.create().

Nested Class Summary

static class

PlasticManager.PlasticManagerBuilder A builder object for configuring the PlasticManager before instantiating it.

Method Summary

void	addPlasticClassListener(PlasticClassListener listener)
<T> ClassInstantiator<T>	createClass(Class<T> baseClass, PlasticClassTransformer callback) Creates an entirely new class, extending from the provided base class.
<T> ClassInstantiator<T>	createProxy(Class<T> interfaceType, PlasticClassTransformer callback) Creates an entirely new class.
<T> PlasticClassTransformation<T>	createProxyTransformation(Class interfaceType) Creates the underlying PlasticClassTransformation for an interface proxy.
<T> ClassInstantiator<T>	getClassInstantiator(String className) Gets the ClassInstantiator for the indicated class, which must be in a transformed package.
ClassLoader	getClassLoader() Returns the ClassLoader that is used to instantiate transformed classes.
void	removePlasticClassListener(PlasticClassListener listener)
static PlasticManager.PlasticManagerBuilder	withClassLoader(ClassLoader loader) Creates a new builder using the specified class loader.
static PlasticManager.PlasticManagerBuilder	withContextClassLoader() Creates a new builder using the thread's context class loader.

Methods inherited from class java.lang.Object

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

Method Detail

withContextClassLoader

public static PlasticManager.PlasticManagerBuilder withContextClassLoader()

Creates a new builder using the thread's context class loader.

withClassLoader

public static PlasticManager.PlasticManagerBuilder withClassLoader(ClassLoader loader)

Creates a new builder using the specified class loader.

getClassLoader

public ClassLoader getClassLoader()

Returns the ClassLoader that is used to instantiate transformed classes. The parent class loader of the returned class loader is the context class loader, or the class loader specified by withClassLoader(ClassLoader).

Returns:

class loader used to load classes in controlled packages

getClassInstantiator

public <T> ClassInstantiator<T> getClassInstantiator(String className)

Gets the ClassInstantiator for the indicated class, which must be in a transformed package.

Parameters:

className - fully qualified class name

Returns:

instantiator (configured via the delegate for the class

Throws:

IllegalArgumentException - if the class is not a transformed class

createClass

public <T> ClassInstantiator<T> createClass(Class<T> baseClass,
                                            PlasticClassTransformer callback)

Creates an entirely new class, extending from the provided base class.

Parameters:

baseClass - class to extend from, which must be a class, not an interface

callback - used to configure the new class

Returns:

the instantiator, which allows instances of the new class to be created

createProxy

public <T> ClassInstantiator<T> createProxy(Class<T> interfaceType,
                                            PlasticClassTransformer callback)

Creates an entirely new class. The class extends from Object and implements the provided interface.

Parameters:

interfaceType - class to extend from, which must be a class, not an interface

callback - used to configure the new class

Returns:

the instantiator, which allows instances of the new class to be created

See Also:

createProxyTransformation(Class)

createProxyTransformation

public <T> PlasticClassTransformation<T> createProxyTransformation(Class interfaceType)

Creates the underlying PlasticClassTransformation for an interface proxy. This should only be used in the cases where encapsulating the PlasticClass construction into a callback is not feasible (which is the case for some of the older APIs inside Tapestry IoC).

Parameters:

interfaceType - class proxy will extend from

Returns:

transformation from which an instantiator may be created

addPlasticClassListener

public void addPlasticClassListener(PlasticClassListener listener)

Specified by:

addPlasticClassListener in interface PlasticClassListenerHub

removePlasticClassListener

public void removePlasticClassListener(PlasticClassListener listener)

Specified by:

removePlasticClassListener in interface PlasticClassListenerHub