Interface ProxyServices
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- All Superinterfaces:
Service
public interface ProxyServices extends Service
Support services related to proxy generation and serialization which are required to be implemented by all containers.
These services are used by all Weld proxy classes to ensure the correct class loaders are used and to aid in the serialization and deserialization of these classes across container instances.
Required in all environments since proxies are always in use. If no such service is provided by integrator, a default implementation will be used which will use the information extracted directly from the type of proxy.
ProxyServices
is a per-deployment service.- Author:
- David Allen, Matej Novotny
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Method Summary
All Methods Instance Methods Abstract Methods Default Methods Deprecated Methods Modifier and Type Method Description default Class<?>
defineClass(Class<?> originalClass, String className, byte[] classBytes, int off, int len)
Given a base type (class or interface), define a proxy class for this type.default Class<?>
defineClass(Class<?> originalClass, String className, byte[] classBytes, int off, int len, ProtectionDomain protectionDomain)
Given a base type (class or interface), define a proxy class for this type.ClassLoader
getClassLoader(Class<?> proxiedBeanType)
Deprecated.defineClass()
methods should be used instead.Class<?>
loadBeanClass(String className)
Deprecated.loadClass(Class<?>, String)
should be used instead.default Class<?>
loadClass(Class<?> originalClass, String classBinaryName)
Given a base type (class or interface), attempts to load a proxy of that class.default boolean
supportsClassDefining()
Deprecated.
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Method Detail
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getClassLoader
@Deprecated ClassLoader getClassLoader(Class<?> proxiedBeanType)
Deprecated.defineClass()
methods should be used instead. Returns the class loader that will load the proxy class which extends or implements the given type. This class loader may simply be the same class loader used for the type, or it may be another class loader designed to hold proxies while still providing access to the given type and any of its ancestors and used types.- Parameters:
proxiedBeanType
- the base type (class or interface) being proxied- Returns:
- the class loader to use for the proxy class
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loadBeanClass
@Deprecated Class<?> loadBeanClass(String className)
Deprecated.loadClass(Class<?>, String)
should be used instead.Loads classes or interfaces extended/implemented by a bean or in particular a proxy class for a bean. This includes application types of the bean as well as Weld types used for proxy classes. Thus the class loader(s) used here must be able to resolve both application classes and Weld implementation classes.
This method is only called during deserialization of a proxy object. It does not necessarily need to use the same class loader that the proxy class itself exists in since
getClassLoader(Class)
will still be used to get the correct class loader for the bean type.- Parameters:
className
- the class name- Returns:
- the corresponding Class object
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defineClass
default Class<?> defineClass(Class<?> originalClass, String className, byte[] classBytes, int off, int len) throws ClassFormatError
Given a base type (class or interface), define a proxy class for this type. Integrators should use the base type to determine a properClassLoader
instance to forward creation to. MimicsClassLoader.defineClass(String name, byte[] b, int off, int len)
. Returns the created class object or throws an exception if there data are not valid or if there is any other problem registering the class with theClassLoader
.- Parameters:
originalClass
- The base type (class or interface) being proxiedclassName
- The binary name of the classclassBytes
- The bytes that make up the class dataoff
- The start offset in classBytes of the class datalen
- The length of the class data- Returns:
- The
Class
object created from the data - Throws:
ClassFormatError
- If the data did not contain a valid class
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defineClass
default Class<?> defineClass(Class<?> originalClass, String className, byte[] classBytes, int off, int len, ProtectionDomain protectionDomain) throws ClassFormatError
Given a base type (class or interface), define a proxy class for this type. Integrators should use the base type to determine a properClassLoader
instance to forward creation to. TheProtectionDomain
passed as an argument can be null (see default implementation of the seconddefineClass()
method). In such a case a newProtectionDomain
should be derived from the originalClass. MimicsClassLoader.defineClass(String name, byte[] b, int off, int len, ProtectionDomain domain)
. Returns the created class object or throws an exception if there data are not valid or if there is any other problem registering the class with theClassLoader
.- Parameters:
originalClass
- The base type (class or interface) being proxiedclassName
- The binary name of the classclassBytes
- The bytes that make up the class dataoff
- The start offset in classBytes of the class datalen
- The length of the class dataprotectionDomain
- The ProtectionDomain of the class or null- Returns:
- The
Class
object created from the data - Throws:
ClassFormatError
- If the data did not contain a valid class
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loadClass
default Class<?> loadClass(Class<?> originalClass, String classBinaryName) throws ClassNotFoundException
Given a base type (class or interface), attempts to load a proxy of that class. Integrators should use the base type to determine properClassLoader
instance to query.- Parameters:
originalClass
- The base type (class or interface) whose proxy we try to loadclassBinaryName
- The binary name of the class- Returns:
- The
Class
object for given binary name of the class - Throws:
ClassNotFoundException
- If the class was not found
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supportsClassDefining
@Deprecated default boolean supportsClassDefining()
Deprecated.This method is now deprecated and Weld assumes that all implementations support class defining. Otherwise, an exception will be thrown. Works as a differentiator between the old (deprecated) approach of asking forClassLoader
and the new one where Weld delegates class loading and creation to the integrator. If this method returns true, then Weld will route all proxy lookup and definition to newly added method. Should it return false, Weld will only use the oldClassLoader
approach.- Returns:
- true if this implementation implements
defineClass()
andloadClass()
methods, false otherwise.
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