org.apache.axis.utils.bytecode

Class ParamReader


public class ParamReader
extends ClassReader

This is the class file reader for obtaining the parameter names for declared methods in a class. The class must have debugging attributes for us to obtain this information.

This does not work for inherited methods. To obtain parameter names for inherited methods, you must use a paramReader for the class that originally declared the method.

don't get tricky, it's the bare minimum. Instances of this class are not threadsafe -- don't share them.

Author:
Edwin Smith, Macromedia

Constructor Summary

ParamReader(Class c)
process a class file, given it's class.
ParamReader(byte[] b)
process the given class bytes directly.

Method Summary

String[]
getParameterNames(Constructor ctor)
return the names of the declared parameters for the given constructor.
protected String[]
getParameterNames(Member member, Class[] paramTypes)
String[]
getParameterNames(Method method)
return the names of the declared parameters for the given method.
void
readCode()
read a code attribute
void
readLocalVariableTable()
this is invoked when a LocalVariableTable attribute is encountered.

Methods inherited from class org.apache.axis.utils.bytecode.ClassReader

findAttributeReaders, getBytes, getSignature, readAttributes, readCode, readCpool, readInt, readShort, resolveClass, resolveField, resolveMethod, resolveNameAndType, resolveUtf8, skipAttributes, skipFully

Constructor Details

ParamReader

public ParamReader(Class c)
            throws IOException
process a class file, given it's class. We'll use the defining classloader to locate the bytecode.

Parameters:
c -


ParamReader

public ParamReader(byte[] b)
            throws IOException
process the given class bytes directly.

Parameters:
b -

Method Details

getParameterNames

public String[] getParameterNames(Constructor ctor)
return the names of the declared parameters for the given constructor. If we cannot determine the names, return null. The returned array will have one name per parameter. The length of the array will be the same as the length of the Class[] array returned by Constructor.getParameterTypes().

Parameters:
ctor -

Returns:
String[] array of names, one per parameter, or null


getParameterNames

protected String[] getParameterNames(Member member,
                                     Class[] paramTypes)


getParameterNames

public String[] getParameterNames(Method method)
return the names of the declared parameters for the given method. If we cannot determine the names, return null. The returned array will have one name per parameter. The length of the array will be the same as the length of the Class[] array returned by Method.getParameterTypes().

Parameters:
method -

Returns:
String[] array of names, one per parameter, or null


readCode

public void readCode()
            throws IOException
read a code attribute
Overrides:
readCode in interface ClassReader


readLocalVariableTable

public void readLocalVariableTable()
            throws IOException
this is invoked when a LocalVariableTable attribute is encountered.


Copyright B) 2005 Apache Web Services Project. All Rights Reserved.