javassist.tools.reflect
public class ClassMetaobject extends Object implements Serializable
A ClassMetaobject
is created for every
class of reflective objects. It can be used to hold values
shared among the reflective objects of the same class.
To obtain a class metaobject, calls _getClass()
on a reflective object. For example,
ClassMetaobject cm = ((Metalevel)reflectiveObject)._getClass();
See Also: Metaobject Metalevel
Field Summary | |
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static boolean | useContextClassLoader
Specifies how a java.lang.Class object is loaded.
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Constructor Summary | |
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ClassMetaobject(String[] params)
Constructs a ClassMetaobject .
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Method Summary | |
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Class | getJavaClass()
Obtains the java.lang.Class representing this class. |
Method | getMethod(int identifier)
Returns the java.lang.reflect.Method object representing
the method specified by identifier .
|
int | getMethodIndex(String originalName, Class[] argTypes)
Returns the identifier index of the method, as identified by its
original name.
|
String | getMethodName(int identifier)
Returns the name of the method specified
by identifier . |
String | getName()
Obtains the name of this class. |
Class[] | getParameterTypes(int identifier)
Returns an array of Class objects representing the
formal parameter types of the method specified
by identifier . |
Method[] | getReflectiveMethods()
Returns an array of the methods defined on the given reflective
object. |
Class | getReturnType(int identifier)
Returns a Class objects representing the
return type of the method specified by identifier . |
static Object | invoke(Object target, int identifier, Object[] args)
Invokes a method whose name begins with
methodPrefix "_m_" and the identifier.
|
boolean | isInstance(Object obj)
Returns true if obj is an instance of this class. |
Object | newInstance(Object[] args)
Creates a new instance of the class.
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Object | trapFieldRead(String name)
Is invoked when static fields of the base-level
class are read and the runtime system intercepts it.
|
void | trapFieldWrite(String name, Object value)
Is invoked when static fields of the base-level
class are modified and the runtime system intercepts it.
|
Object | trapMethodcall(int identifier, Object[] args)
Is invoked when static methods of the base-level
class are called and the runtime system intercepts it.
|
java.lang.Class
object is loaded.
If true, it is loaded by:
Thread.currentThread().getContextClassLoader().loadClass()
If false, it is loaded by Class.forName()
.
The default value is false.
ClassMetaobject
.
Parameters: params params[0]
is the name of the class
of the reflective objects.
java.lang.Class
representing this class.java.lang.reflect.Method
object representing
the method specified by identifier
.
Note that the actual method returned will be have an altered,
reflective name i.e. _m_2_..
.
Parameters: identifier the identifier index
given to trapMethodcall()
etc.
See Also: (int,Object[])
(int,Object[])
This method is useful, in conjuction with ClassMetaobject#getMethod(), to obtain a quick reference to the original method in the reflected class (i.e. not the proxy method), using the original name of the method.
Written by Brett Randall and Shigeru Chiba.
Parameters: originalName The original name of the reflected method argTypes array of Class specifying the method signature
Returns: the identifier index of the original method
Throws: NoSuchMethodException if the method does not exist
See Also: ClassMetaobject
identifier
.Class
objects representing the
formal parameter types of the method specified
by identifier
.Class
objects representing the
return type of the method specified by identifier
.methodPrefix "_m_"
and the identifier.
Throws: CannotInvokeException if the invocation fails.
obj
is an instance of this class.Parameters: args the arguments passed to the constructor.
static
fields of the base-level
class are read and the runtime system intercepts it.
This method simply returns the value of the field.
Every subclass of this class should redefine this method.
static
fields of the base-level
class are modified and the runtime system intercepts it.
This method simply sets the field to the given value.
Every subclass of this class should redefine this method.
static
methods of the base-level
class are called and the runtime system intercepts it.
This method simply executes the intercepted method invocation
with the original parameters and returns the resulting value.
Every subclass of this class should redefine this method.