org.apache.avalon.fortress.impl.factory
Class BCELCodeGenerator

java.lang.Object
  org.apache.avalon.fortress.impl.factory.BCELCodeGenerator

public final class BCELCodeGenerator
extends Object

BCELCodeGenerator creates implementations for the Methods and Fields needed in creating a WrapperClass.

Author:

Avalon Development Team

Constructor Summary

BCELCodeGenerator()
Default constructor.

Method Summary

org.apache.bcel.classfile.Method	createDefaultConstructor() Create the wrapper class' default constructor:
org.apache.bcel.classfile.Method[]	createImplementation(org.apache.bcel.classfile.JavaClass[] interfacesToImplement) Creates an implementation for the supplied JavaClass instance representing an interface.
org.apache.bcel.classfile.Method	createMethodWrapper(org.apache.avalon.fortress.impl.factory.BCELCodeGenerator.MethodDesc meth) Create a method declaration/definition of the form
org.apache.bcel.classfile.Method	createMethodWrapper(org.apache.bcel.classfile.Method methodToWrap) Create a method declaration/definition of the form
org.apache.bcel.classfile.Method	createWrappedClassAccessor() Create a field accessor for the wrapped class instance of the form
org.apache.bcel.classfile.Field	createWrappedClassField() Create a field declaration of the form
void	init(String wrapperClassName, String wrapperSuperclassName, org.apache.bcel.classfile.JavaClass classToWrap, org.apache.bcel.generic.ClassGen classGenerator)

Methods inherited from class java.lang.Object

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

Constructor Detail

BCELCodeGenerator

public BCELCodeGenerator()

Default constructor.

Method Detail

init

public void init(String wrapperClassName,
                 String wrapperSuperclassName,
                 org.apache.bcel.classfile.JavaClass classToWrap,
                 org.apache.bcel.generic.ClassGen classGenerator)
          throws IllegalArgumentException

Throws:

IllegalArgumentException

createWrappedClassField

public org.apache.bcel.classfile.Field createWrappedClassField()
                                                        throws IllegalStateException

Create a field declaration of the form

  
      private  WRAPPED_CLASS_FN;
  
 

Returns:

Field

Throws:

IllegalStateException - If this instance is not initialized.

createDefaultConstructor

public org.apache.bcel.classfile.Method createDefaultConstructor()
                                                          throws IllegalStateException

Create the wrapper class' default constructor:

  
      public ( classToWrap)
      {
          this. = classToWrap;
      }
  
 

Returns:

The created default constructor

Throws:

IllegalStateException - If this instance is not initialized.

createWrappedClassAccessor

public org.apache.bcel.classfile.Method createWrappedClassAccessor()
                                                            throws IllegalStateException

Create a field accessor for the wrapped class instance of the form

  
      public Object ()
      {
          return this.;
      }
  
 

Returns:

Method

Throws:

IllegalStateException

createMethodWrapper

public org.apache.bcel.classfile.Method createMethodWrapper(org.apache.avalon.fortress.impl.factory.BCELCodeGenerator.MethodDesc meth)
                                                     throws IllegalArgumentException,
                                                            IllegalStateException

Create a method declaration/definition of the form

  
      public  ()
          throws 
      {
          return this..();
      }
  
 

Parameters:

meth - The method descriptor

Returns:

Method The Method object representing the created method

Throws:

IllegalArgumentException - If any of the parameters passed in is null.

IllegalStateException - If this instance is not initialized.

createMethodWrapper

public org.apache.bcel.classfile.Method createMethodWrapper(org.apache.bcel.classfile.Method methodToWrap)
                                                     throws IllegalArgumentException,
                                                            IllegalStateException

Create a method declaration/definition of the form

  
      public  ()
          throws 
      {
          return this..();
      }
  
 

Parameters:

methodToWrap - The Method to create a wrapper for.

Returns:

Method The wrapper method.

Throws:

IllegalArgumentException - If methodToWrao is null.

IllegalStateException - If this instance is not initialized.

createImplementation

public org.apache.bcel.classfile.Method[] createImplementation(org.apache.bcel.classfile.JavaClass[] interfacesToImplement)
                                                        throws Exception

Creates an implementation for the supplied JavaClass instance representing an interface.

Parameters:

interfacesToImplement - The interfaces we want to create an implementation for

Returns:

Method[] An array of Method instances representing the interface implementation.

Throws:

IllegalArgumentException - If interfaceToImplement is null or does not represent an interface

IllegalStateException - If this instance has not been initialized

Exception