soaprmi.util.bytecode
Class ParamReader

java.lang.Object
  extended byjava.io.InputStream
      extended byjava.io.ByteArrayInputStream
          extended bysoaprmi.util.bytecode.ClassReader
              extended bysoaprmi.util.bytecode.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.

Adapted from Apache AXIS by Alek.

Author:
Edwin Smith, Macromedia, Aleksander Slominski

Constructor Summary
ParamReader(byte[] b)
          process the given class bytes directly.
ParamReader(java.lang.Class c)
          process a class file, given it's class.
 
Method Summary
 java.lang.String[] getParameterNames(java.lang.reflect.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 java.io.ByteArrayInputStream
available, close, mark, markSupported, read, read, reset, skip
 
Methods inherited from class java.io.InputStream
read
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ParamReader

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

Parameters:
c -
Throws:
java.io.IOException

ParamReader

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

Parameters:
b -
Throws:
java.io.IOException
Method Detail

readCode

public void readCode()
              throws java.io.IOException
Description copied from class: ClassReader
read a code attribute

Overrides:
readCode in class ClassReader
Throws:
java.io.IOException

getParameterNames

public java.lang.String[] getParameterNames(java.lang.reflect.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

readLocalVariableTable

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

Throws:
java.io.IOException


Copyright (c) 2004 IU Extreme! Lab http://www.extreme.indiana.edu/ All Rights Reserved.