org.jboss.weld.util.bytecode

Class ConstructorUtils

java.lang.Object

org.jboss.weld.util.bytecode.ConstructorUtils

public class ConstructorUtils
extends java.lang.Object

Utility class for working with constructors in the low level javassist API

Author:

Stuart Douglas

Method Summary

Methods

Modifier and Type	Method and Description
static void	addConstructor(java.lang.String descriptor, java.lang.String[] exceptions, javassist.bytecode.ClassFile file, javassist.bytecode.Bytecode initialValueBytecode) Adds a constructor that delegates to a super constructor with the same descriptor.
static void	addDefaultConstructor(javassist.bytecode.ClassFile file, javassist.bytecode.Bytecode initialValueBytecode) adds a constructor that calls super()

Methods inherited from class java.lang.Object

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

Method Detail

addDefaultConstructor

public static void addDefaultConstructor(javassist.bytecode.ClassFile file,
                         javassist.bytecode.Bytecode initialValueBytecode)

adds a constructor that calls super()

addConstructor

public static void addConstructor(java.lang.String descriptor,
                  java.lang.String[] exceptions,
                  javassist.bytecode.ClassFile file,
                  javassist.bytecode.Bytecode initialValueBytecode)

Adds a constructor that delegates to a super constructor with the same descriptor. The bytecode in inialValueBytecode will be executed at the start of the constructor and can be used to inialize fields to a default value. As the object is not properly constructed at this point this bytecode may not reference this (i.e. the variable at location 0)

Parameters:

descriptor - the constructor descriptor

exceptions - any exceptions that are thrown

file - the classfile to add the constructor to

initialValueBytecode - bytecode that can be used to set inial values