org.jpox.enhancer.bcel
Class BCELClassMethod

java.lang.Object
  org.jpox.enhancer.ClassMethod
      org.jpox.enhancer.bcel.BCELClassMethod

Direct Known Subclasses:

CheckReadMethod, CheckWriteMethod, DefaultConstructor, InitFieldFlags, InitFieldNames, InitFieldTypes, InitPersistenceCapableSuperClass, IsXXXMethod, JdoCopyField, JdoCopyFields, JdoCopyKeyFieldsFromObjectId, JdoCopyKeyFieldsFromObjectId2, JdoCopyKeyFieldsToObjectId, JdoCopyKeyFieldsToObjectId2, JdoGetManagedFieldCount, JdoIsDetached, JdoIsDirty, JdoMakeDirty, JdoNewInstance1, JdoNewInstance2, JdoNewObjectIdInstance1, JdoNewObjectIdInstance2, JdoProvideField, JdoReplaceDetachedState, JdoReplaceField, JdoReplaceFlags, JdoReplaceStateManager, LoadClass, MediateReadMethod, MediateWriteMethod, NormalGetMethod, NormalSetMethod, ParentManagedFieldNum, ReplaceMethodCallback, SimpleStateManagerCall, SuperClone, SwitchInverseTarget, SwitchTarget, WriteObject

public abstract class BCELClassMethod
extends ClassMethod

Representation of a method required by an enhanced class, for use by BCEL.

Version:

$Revision: 1.4 $

Field Summary

protected org.apache.bcel.generic.ClassGen	classGen target ClassGen instance
protected java.lang.String	className target class name
protected BCELClassMetaData	cmd ClassMetaData for the class
protected org.apache.bcel.generic.ConstantPoolGen	constantPoolGen target ConstantPoolGen instance
protected org.apache.bcel.generic.InstructionFactory	factory InstructionFactory instance
protected org.apache.bcel.generic.InstructionList	il InstructionList instance
protected static org.jpox.util.Localiser	LOCALISER Localisation of messages
protected org.apache.bcel.generic.MethodGen	methodGen MethodGen instance
protected boolean	synthetic is synthetic

Fields inherited from class org.jpox.enhancer.ClassMethod

access, argNames, argTypes, enhancer, exceptions, methodName, returnType

Constructor Summary

BCELClassMethod(java.lang.String methodName, int permissions, org.apache.bcel.generic.Type returnType, org.apache.bcel.generic.Type[] argTypes, java.lang.String[] argNames, boolean synthetic, BCELClassEnhancer enhancer)
Constructor.

Method Summary

void	close() Method to close the definition of the class method
protected org.apache.bcel.generic.InstructionHandle	createThrowException(java.lang.String newException, java.lang.String message) Helper method to create a throw exception instruction.
protected org.apache.bcel.generic.InstructionHandle	createThrowException(java.lang.String newException, java.lang.String message, org.apache.bcel.generic.Instruction intMessage) Helper method to create a throw exception instruction.
void	execute() Method to add the contents of the class method.
protected BCELClassEnhancer	getClassEnhancer() Convenience accessor for the BCELClassEnhancer
void	initialise() Method to initialise the class method.

Methods inherited from class org.jpox.enhancer.ClassMethod

equals, getAccess, getMethodAdditionMessage, getName, hashCode

Methods inherited from class java.lang.Object

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

Field Detail

LOCALISER

protected static org.jpox.util.Localiser LOCALISER

Localisation of messages

factory

protected org.apache.bcel.generic.InstructionFactory factory

InstructionFactory instance

il

protected org.apache.bcel.generic.InstructionList il

InstructionList instance

methodGen

protected org.apache.bcel.generic.MethodGen methodGen

MethodGen instance

synthetic

protected boolean synthetic

is synthetic

classGen

protected org.apache.bcel.generic.ClassGen classGen

target ClassGen instance

className

protected java.lang.String className

target class name

constantPoolGen

protected org.apache.bcel.generic.ConstantPoolGen constantPoolGen

target ConstantPoolGen instance

cmd

protected BCELClassMetaData cmd

ClassMetaData for the class

Constructor Detail

BCELClassMethod

public BCELClassMethod(java.lang.String methodName,
                       int permissions,
                       org.apache.bcel.generic.Type returnType,
                       org.apache.bcel.generic.Type[] argTypes,
                       java.lang.String[] argNames,
                       boolean synthetic,
                       BCELClassEnhancer enhancer)

Constructor.

Parameters:

methodName - method name

permissions - bcel method type

returnType - return type

argTypes - argment types

argNames - argment names

synthetic - synthetic method

enhancer - Class Enhancer

Method Detail

getClassEnhancer

protected BCELClassEnhancer getClassEnhancer()

Convenience accessor for the BCELClassEnhancer

Returns:

ClassEnhancer for BCEL

initialise

public void initialise()

Method to initialise the class method.

Specified by:

initialise in class ClassMethod

execute

public void execute()

Method to add the contents of the class method.

Specified by:

execute in class ClassMethod

close

public void close()

Method to close the definition of the class method

Overrides:

close in class ClassMethod

createThrowException

protected org.apache.bcel.generic.InstructionHandle createThrowException(java.lang.String newException,
                                                                         java.lang.String message,
                                                                         org.apache.bcel.generic.Instruction intMessage)

Helper method to create a throw exception instruction.
this method generate below code...
throw new [newExceptin param class]([message param]+[intMessage param]);

Parameters:

newException - throw exception

message - exception message

intMessage - exception message append ,like ICONST_2 or ILOAD_1

Returns:

first InstructionHandle

createThrowException

protected org.apache.bcel.generic.InstructionHandle createThrowException(java.lang.String newException,
                                                                         java.lang.String message)

Helper method to create a throw exception instruction.
this method generate below code...
throw new [newExceptin param class]([message param]);

Parameters:

newException - throw exception

message - exception message

Returns:

first InstructionHandle