Package org.apache.axis.utils.bytecode
Class ParamReader
- java.lang.Object
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- java.io.InputStream
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- java.io.ByteArrayInputStream
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- org.apache.axis.utils.bytecode.ClassReader
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- org.apache.axis.utils.bytecode.ParamReader
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- All Implemented Interfaces:
java.io.Closeable
,java.lang.AutoCloseable
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
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Constructor Summary
Constructors Constructor Description ParamReader(byte[] b)
process the given class bytes directly.ParamReader(java.lang.Class c)
process a class file, given it's class.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.String[]
getParameterNames(java.lang.reflect.Constructor ctor)
return the names of the declared parameters for the given constructor.protected java.lang.String[]
getParameterNames(java.lang.reflect.Member member, java.lang.Class[] paramTypes)
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 attributevoid
readLocalVariableTable()
this is invoked when a LocalVariableTable attribute is encountered.-
Methods inherited from class org.apache.axis.utils.bytecode.ClassReader
findAttributeReaders, getBytes, getSignature, readAttributes, readCpool, readInt, readShort, resolveClass, resolveField, resolveMethod, resolveNameAndType, resolveUtf8, skipAttributes, skipFully
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Constructor Detail
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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
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ParamReader
public ParamReader(byte[] b) throws java.io.IOException
process the given class bytes directly.- Parameters:
b
-- Throws:
java.io.IOException
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Method Detail
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readCode
public void readCode() throws java.io.IOException
Description copied from class:ClassReader
read a code attribute- Overrides:
readCode
in classClassReader
- Throws:
java.io.IOException
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getParameterNames
public java.lang.String[] getParameterNames(java.lang.reflect.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
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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
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getParameterNames
protected java.lang.String[] getParameterNames(java.lang.reflect.Member member, java.lang.Class[] paramTypes)
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readLocalVariableTable
public void readLocalVariableTable() throws java.io.IOException
this is invoked when a LocalVariableTable attribute is encountered.- Throws:
java.io.IOException
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